Mixing calciner

An object of this invention is to provide a mixing calciner that can separate and recover CO 2 gas in a high concentration, which is generated when a to-be-calcined cement material is mixed with a superheated calcined portion and calcined, by employing a fluidized-bed type or a spouted-bed type. The invention provides a mixing calciner ( 12 ) which mixes the calcined cement material with the superheated calcined portion to cause a calcination reaction, wherein the mixing calciner is the fluidized-bed type or the spouted-bed type, and is provided with a plurality of feed lines ( 25 ) for feeding the to-be-calcined cement material. In addition, this invention provides a mixing calciner which easily fluidizes or spouts a cement material even when a heat medium has a particle diameter larger than that of the cement material, and can separate and recover CO 2 gas generated in a cement-manufacturing facility in a high concentration.

Powder Lime Calcining Process and System

A powder lime calcining process comprises: transporting fine granules of limestones having a water content less than 4%, and a granule size less than 15 mm, from a raw material storing bin to a small material bin, transporting the materials from the small material bin into an airflow pipe by a belt conveyer, heating and drying the materials, sieving the materials by a sieving device, transporting granules into a cyclone cylinder deduster and a clothbag deduster in turn by airflow pipes, the fine powders of limestones after dedusted are transported into an intermediate bin; the materials within the intermediate bin are transported to four preheating cyclone cylinders by a pneumatic lift pump and airflow pipes, and are preheated and separated; the materials after separated are transported into three cooling cyclone cylinders for cooling and separating the materials, finally transported into a finished product bin by a finished product transporting system. 1. A powder lime calcining process comprising: transporting fine granules of limestones having a water content less than 4% , and a granule size less than 15 mm , from a raw material storing bin to a small material bin , transporting the materials from the small material bin into airflow pipes by a belt conveyer , heating and drying the materials within the pipes , and sieving the materials , wherein coarser granules having a granule size more than 3 mm are transported into a breaking machine for breaking , finer granules having a granule size less than 3 mm are transported by airflow pipes into a cyclone cylinder deduster and a clothbag deduster in turn; the fine powders of limestones adapting to be calcined in a kiln after dedusted , collected , dried and broken are transported into an intermediate bin , where the fine powders of limestones having a water content less than 1% , and a granule size less than 3 mm; the materials within the intermediate bin are transported to four preheating cyclone cylinders disposed ...

Recirculated-suspension pre-calciner system

A recirculated-suspension pre-calciner system is disclosed, comprising: a vortex cyclone dust collecting equipment including a plurality of devices, wherein a top device of the vortex cyclone dust collecting equipment is used as a feed system; a vertical combustion kiln; a blower; and a powder purge system, wherein powders in the feed system fall into the vortex cyclone dust collecting equipment and pass through a plurality of the devices to mix and exchange heat with flue gas comprising CO 2 , generating calcination reaction and releasing CO2 into the flue gas. and the steam is separated and transported to the feed system by the blower and acts as a carrier gas of powders.

SYSTEM FOR CALCINING ACTIVE LIME WITH A PRECALCINING FURNACE AND METHOD USING THE SAME

The invention provides a system for calcining active lime, including a precalcining furnace for receiving limestone materials to be calcined and precalcining the limestone materials, and a rotary kiln for receiving the materials containing precalcined product from the precalcining furnace, outputting the formed active lime, and at the same time supplying a first flue gas to the precalcining furnace. The calcining system further includes a precalcining furnace combustion device, which generates a second flue gas and supplies it to the precalcining furnace, such that the limestone materials are precalcined in the precalcining furnace under the action of the first flue gas and the second flue gas. In this way, the precalcining rate of the limestone materials in the precalcining furnace is significantly improved. Since the heat exchange in the precalcining furnace is mainly in the form of convective heat exchange having a high heat efficiency, the heat exchange efficiency of the whole system is improved, and thus the heat consumption of the system is reduced. 1. A system for calcining active lime , includinga precalcining furnace for receiving limestone materials to be calcined and precalcining the limestone materials,a rotary kiln for receiving the materials containing precalcined product from the precalcining furnace, outputting the formed active lime, and at the same time supplying a first flue gas to the precalcining furnace,characterized in that the calcining system further includes a precalcining furnace combustion device, which generates a second flue gas and supplies it to the precalcining furnace, such that the limestone materials are precalcined in the precalcining furnace under the action of the first flue gas and the second flue gas.2. The calcining system according to claim 1 , characterized in that the temperature of the second flue gas is higher than that of the first flue gas.3. The calcining system according to claim 2 , characterized in that the second ...

Solid fuel skewer suspension burning system

A skewer system comprises a skewer rod that holds tires in suspension during an incineration process where the tires are burned for fuel in a kiln such as a cement kiln or a lime kiln. In certain implementations, the skewer system also comprises a fuel advancing system to advance tires loaded onto the skewer rod into the heated gas in a stationary heat transfer station of the kiln. In further exemplary implementations, the skewer system comprises a mechanism to recover wire remnants from incinerated tires, the wire can be cut off the skewer and dropped into the kiln, or the wire itself can be burned off.

CARBON DIOXIDE PRODUCTION

Apparatus for the production of carbon dioxide from limestone includes a nuclear reactor () for generating heat and a rotary kiln (). The rotary kiln () has an inlet () for the introduction of limestone and an outlet () for the release of carbon dioxide. A heat transfer arrangement is provided for transferring heat from the nuclear reactor () to the interior of the rotary kiln (). The heat transfer arrangement includes feed and return primary conduits () for passing a heat transfer fluid () through the nuclear reactor () so that heat may be extracted from the nuclear reactor () for transfer to the interior of the rotary kiln (). Limestone in the rotary kiln () is thereby heated to a temperature sufficient for the release of carbon dioxide. 1. Apparatus for the production of carbon dioxide from limestone , comprising:a nuclear reactor for generating heat;a rotary kiln having an inlet for the introduction of limestone and an outlet for the release of carbon dioxide; anda heat transfer arrangement for transferring heat from the nuclear reactor to the interior of the rotary kiln, the heat transfer arrangement including feed and return primary conduits for passing a heat transfer fluid through the nuclear reactor to extract heat therefrom for transfer to the interior of the rotary kiln thereby to heat the limestone to a temperature sufficient for the release of carbon dioxide.2. Apparatus as claimed in claim 1 , wherein the heat transfer arrangement includes a heat exchanger through which the heat transfer fluid is passed for the supply of heat from the nuclear reactor to the heat exchanger.3. Apparatus as claimed in claim 2 , wherein the heat exchanger comprises a water boiler to generate steam and a secondary conduit for the steam generated by the boiler claim 2 , to feed steam to the rotary kiln for heating limestone therein.4. Apparatus as claimed in claim 3 , wherein the secondary conduit comprises a feed secondary conduit for the supply of steam to the rotary kiln ...

LONG FLAME PROCESS HEATER

A flame used to heat a process material may be extended or otherwise shaped by the application of voltages using electrodes. 1. A long flame process heater , comprising:a burner configured to support a flame along an axis substantially parallel to a process material;a charge electrode configured to impart a first polarity voltage or majority charge to the flame; anda field electrode disposed distal to the burner and configured to electrically attract the first polarity voltage or majority charge with a second voltage different from the first voltage and to thereby cause the flame to extend toward the field electrode.2. The long flame process heater of claim 1 , wherein the second electrode is configured to carry a voltage having a second polarity opposite to the first polarity.3. The long flame process heater of claim 1 , wherein the second electrode is configured for electrical continuity with a voltage ground.4. The long flame process heater of claim 1 , further comprising:a process material support mechanism or conveyor configured to support or convey the process material while it is exposed to radiation heat transfer from the flame.5. The long flame process heater of claim 4 , wherein the process material support mechanism includes a rack configured to support a batch of process material.6. The long flame process heater of claim 4 , wherein the conveyor includes a rotating kiln shell.7. The long flame process heater of claim 1 , wherein the charge electrode and the field electrode are configured to cooperate to draw the flame to a stable length longer than a stable length achievable without the cooperation of the charge electrode and the field electrode.8. The long flame process heater of claim 1 , wherein the charge electrode and the field electrode are configured to cooperate to draw the flame to a stable length having at least one of less flicker or less length variation than a stable length achievable without the cooperation of the charge electrode and the ...

Postponed Onset of Quicklime Hydration

The present invention provides compositions and methods relative to controlling hydration onset of an alkaline earth metal oxide such as calcium oxide, comprising heating an inorganic alkaline earth metal oxide to sub-calcination temperatures in the presence of organic material comprising a carbohydrate, an amino-carboxylic acid, a hydroxycarboxylic acid, or a mixture thereof. Preferred treated particles comprise at least 40% and more preferably at least 80% by dry weight calcium oxide which is heated in the presence of ascorbic acid and a starch. Treated particles of the present invention manifest an unexpected, surprising hydration induction postponement behavior as demonstrated through calorimetric testing. 1. A composition comprising: treated alkaline earth metal oxide particles treated by heating precursor alkaline earth metal oxide particles comprising 40-100 percent by total dry weight of calcium oxide , magnesium oxide , or mixture thereof , at an average temperature within 200° C.-700° C. , for a period of 20-300 minutes , in the presence of an organic material comprising a carbohydrate , amino-carboxylic acid , hydroxycarboxylic acid , or mixture thereof.2. The composition of wherein the treated alkaline earth metal oxide particles comprise at least 50 percent by total dry weight of calcium oxide based on total dry weight of the inorganic portion of particles; and the treated particles are treated by heating to 250° C.-500° C. for 20-200 minutes.3. The composition of wherein the treated alkaline earth metal oxide particles comprise at least 80-100 percent by total dry weight of calcium oxide based on total dry weight of the inorganic portion of the particles; and the treated particles were treated by heating to 250° C.-500° C. for 20-200 minutes.4. The composition of wherein the treated alkaline earth metal oxide particles claim 1 , after completion of heating claim 1 , have delayed onset of hydration of at least 30 minutes when the particles are mixed ...

METHODS AND SYSTEMS FOR UTILIZING CALCIUM COMPOUND FROM CALCINED LIMESTONE

Provided herein are methods comprising a) calcining limestone in a cement plant to form carbon dioxide and calcium compound selected from calcium oxide, calcium hydroxide, or combination thereof; b) treating the calcium compound with N-containing salt in water to produce an aqueous solution comprising calcium salt and N-containing salt; and c) contacting the aqueous solution with the carbon dioxide under one or more precipitation conditions to produce a precipitation material comprising calcium carbonate and a supernatant aqueous solution wherein the calcium carbonate comprises vaterite. 1. A method comprising:a) calcining limestone in a cement plant to form carbon dioxide and calcium compound selected from calcium oxide, calcium hydroxide, or combination thereof;b) treating the calcium compound with N-containing salt in water to produce an aqueous solution comprising calcium salt and N-containing salt; andc) contacting the aqueous solution with the carbon dioxide under one or more precipitation conditions to produce a precipitation material comprising calcium carbonate and a supernatant aqueous solution wherein the calcium carbonate comprises vaterite.2. The method of claim 1 , wherein the treating step further comprises adding anhydrous ammonia or an aqueous solution of ammonia.3. The method of claim 1 , wherein the N-containing salt is N-containing inorganic salt claim 1 , N-containing organic salt claim 1 , or combination thereof.4. The method of claim 1 , wherein the N-containing salt is N-containing inorganic salt selected from the group consisting of ammonium halide claim 1 , ammonium acetate claim 1 , ammonium sulfate claim 1 , ammonium sulfite claim 1 , ammonium nitrate claim 1 , ammonium nitrite claim 1 , and combinations thereof.5. The method of claim 1 , wherein the N-containing salt is ammonium chloride.6. The method of claim 1 , wherein the N-containing salt is N-containing organic salt that has N-containing organic compound selected from the group ...

METHOD FOR BURNING PELLETIZED GOOD

According to the invention, the method for burning fragmented material is carried out in at least one shaft which comprises a preheating zone, a combustion zone and a cooling zone, coal having a swelling index>1 being supplied via combustion lances, and the temperature of the coal in the combustion lances being maintained below a temperature value at which melting phases of the coal used are formed. 1. Method for burning fragmented material in at least one shaft which comprises a preheating zone , a combustion zone and a cooling zone , coal being supplied via combustion lances ,characterised in that coal having a swelling index greater than 1 is supplied and the temperature of the coal in the combustion lances is maintained below a temperature value at which melting phases of the coal used are formed.2. Method according to claim 1 , characterised in that the combustion lances are arranged in the preheating zone or the combustion zone of the shaft and are in operational contact with the fragmented material located there in order to heat the coal in the combustion lances.3. Method according to claim 1 , characterised in that the temperature of the coal in the combustion lances is kept below 250° C. claim 1 , preferably below 200° C. and in a most preferable manner below 150° C.4. Method according to claim 1 , characterised in that the combustion lances are provided with an insulation.5. Method according to claim 1 , characterised in that the combustion lances are cooled.6. Method according to claim 1 , characterised in that the coal is cooled before being supplied to the combustion lances.7. Method according to claim 1 , characterised in that the coal is supplied with a transport gas via the combustion lances and the temperature of the coal is adjusted by means of the quantity and/or temperature of the transport gas.8. Method according to claim 1 , characterised in that non-combustible components claim 1 , in particular CaO or CaCO3-containing components claim 1 , are ...

Method for controlling nox concentration in exhaust gas in combustion facility using pulverized coal

A method for controlling an NOx concentration in an exhaust gas in a combustion facility by: measuring a reaction velocity k i of each of a plurality of chars, each corresponding to a plurality of types of pulverized coals; determining a relationship between the NOx concentration in the exhaust gas and the reaction velocity k i for each of the chars; (iii) blending the plurality of the types of the pulverized coal, wherein a blending ratio of the plurality of the types of the pulverized coal is determined by using, as an index, a reaction velocity k blend of the char of the blended pulverized coal, which corresponds to a target NOx concentration or below, on the basis of the relationship; and supplying the blended pulverized coal to the combustion facility as the fuel of the combustion facility.

Oxide products formed from calcined carbonate powder for use as biocide, chemical detoxifier and catalyst support products

A process and apparatus for manufacture of oxide products for use as biocide, chemical detoxifying, and catalytic support products, from caustic calcined carbonate powder, preferably from magnesite, dolomite, or hydromagnesite, is described. These oxide particles are characterized by high surface area, high porosity and a high degree of calcination, and the method of manufacture of utilizes an indirectly heated counterflow reactor. The oxides may be used as a powder, granules, or formulated into a slurry and used as a spray, emulsion, foam or fog, or the powder product may be directly applied. Also described is the formation of particles with microstructures defined by at least one nano-crystalline structure positioned on the outer surface of the particles.

DEVICE AND SYSTEM FOR PRODUCING CEMENT CLINKER

In the method according to the invention for producing cement clinker, raw cement meal is preheated in a preheater, the preheated raw cement meal is precalcined in a calciner and the precalcined raw cement meal is burnt in a kiln, fuel and combustion air having an oxygen content of at least 75 mol % being used in the calciner, and the raw cement meal being precalcined in a fluidised bed in the calciner. The exhaust gases occurring in the kiln are delivered to the preheater, bypassing the calciner, and the exhaust gases of the calciner are delivered to a COpreparation device.

LIME KILN APPARATUS FULLY RECYCLING CO2

The present application provides a lime kiln apparatus recycling COwhich includes a kiln body () and a heat-accumulating furnace set (). The kiln body () defines no burner therein, and the heat-accumulating furnace set () provides hot CO() heated to a set temperature to the kiln body () for calcining mineral material, thereby finished lime is obtained. COgenerated during the lime production is all recycled. After being dedusted, a part of the recycled COis transported to the heat-accumulating furnace set () for heating, and is sent back to the kiln for calcining the mineral material after being heated to a temperature within a range of 800° C.-1200° C., and the other part of the recycled COis recycled for use. 11002010020100201001002010020100. A lime kiln apparatus fully recycling CO , wherein comprising a kiln body () and a heat-accumulating furnace set () , the kiln body () defines no burner , the heat-accumulating furnace set () is configured to heat COto a set temperature , and to send the heated COto the kiln body () to calcinate a preheated mineral material; wherein COgenerated during the calcination mixes with the COheated by the heat-accumulating furnace set () to go upwards to preheat a mineral material at an upper part of the kiln body () , and the mixed COis pumped out of the upper part of the kiln body () to enter the heat-accumulating furnace set (); the mixed COis sent to the kiln body () after being heated to the set temperature by the heat-accumulating furnace set (); and finished lime obtained by the calcination is discharged from a bottom of the kiln body () after being cooled.210030401001101201301003011012040130120130505010013010040. The lime kiln apparatus fully recycling COaccording to claim 1 , wherein the kiln body () comprises a in-in-feeding device () and a out-in-feeding device (); a working area of the kiln body () comprises a preheating section () claim 1 , a calcining section () and a cooling section () sequentially arranged from top to ...

PROCESS AND SYSTEM FOR PRODUCING COMMERCIAL QUALITY CARBON DIOXIDE FROM RECAUSTICIZING PROCESS CALCIUM CARBONATES

The invention features methods and systems for recovering carbon dioxide, for producing commercial quality carbon dioxide (CO) of 90% to +99% purity using, wet calcium carbonate lime mud produced in a recausticizing process that also produces caustic soda, for instance, Kraft paper pulp mill lime mud (a.k.a., “lime mud”) as a feedstock to a multi-stage lime mud calcination process. This process may be fueled with low, or negative cost “carbon-neutral” fuels such as waste water treatment plant (WWTP) sludge, biomass, precipitated lignins, coal, or other low cost solid fuels. High reactivity, high-quality calcined lime mud (a.k.a. re-burned lime, or calcine), required in the Kraft paper pulp mill's recausticizing process is also produced, and superheated high pressure steam and hot boiler feed-water is generated and exported to the mill's steam distribution and generation system as well as hot process water for use in the mill's manufacturing operation. The system for calcining calcium carbonate lime mud produced from a recausticizing manufacturing operation and converting it to calcined lime mud and COcomprises a calciner and a combustor linked by a moving media heat transfer (MMHT) system or apparatus. The MMHT system or apparatus thermally links separate fluid bed combustion (exothermic) and calcination (endothermic) stages with a solid particulate media. The system further comprises a flash dryer or spray dryer that utilizes exhausted enthalpy from the calcination stage. 1. A method for recovering carbon dioxide comprising:(a) providing wet lime mud sufficiently near a bubbling fluid bed calciner and a spray dryer or flash dryer such that the calciner and flash dryer or spray dryer operate in counter/current gas/solids flow wherein exiting calciner gases substantially dry the wet lime mud and the resulting dry lime mud is fed to the calciner;(b) feeding substantially dry lime mud to the fluid bed calciner wherein the fluid bed calciner is thermally linked by ...

METHOD AND DEVICE FOR CARRYING OUT ENDOTHERMIC GAS PHASE-SOLID OR GAS-SOLID REACTIONS

The present invention relates to a process for conducting endothermic gas phase or gas-solid reactions, wherein the endothermic reaction is conducted in a production phase in a first reactor zone, the production zone, which is at least partly filled with solid particles, where the solid particles are in the form of a fixed bed, of a moving bed and in sections/or in the form of a fluidized bed, and the product-containing gas stream is drawn off from the production zone in the region of the highest temperature level plus/minus 200 K and the product-containing gas stream is guided through a second reactor zone, the heat recycling zone, which at least partly comprises a fixed bed, where the heat from the product-containing gas stream is stored in the fixed bed, and, in the subsequent purge step, a purge gas is guided through the production zone and the heat recycling zone in the same flow direction, and, in a heating zone disposed between the production zone and the heat recycling zone, the heat required for the endothermic reaction is introduced into the product-containing gas stream and into the purge stream or into the purge stream, and then, in a regeneration phase, a gas is passed through the two reactor zones in the reverse flow direction and the production zone is heated up; the present invention further relates to a structured reactor comprising three zones, a production zone containing solid particles, a heating zone and a heat recycling zone containing a fixed bed, wherein the solid particles and the fixed bed consist of different materials. 1: A process for conducting endothermic gas phase or gas-solid reactions , the process comprising:conducting an endothermic reaction in a production step in a first reactor zone, a production zone, which is at least partly filled with solid particles, where the solid particles are in the form of a fixed bed, of a moving bed and in sections or in the form of a fluidized bed, anddrawing off a product-containing gas stream ...

PROCESS AND PLANT FOR MANUFACTURING CEMENT IN THE OXYFUEL MODE

Process for operating a cement or lime plant comprising a cement or lime kiln and a calciner, wherein heat is generated by combustion of a fuel in the kiln and/or calciner, wherein a gas fed to the kiln and the calciner or to the calciner for combustion of the fuel contains an oxygen rich exhaust gas from a bioreactor containing photoautotrophic organisms and wherein the plant is preferably operated in the oxyfuel mode by using exhaust gas from the kiln and/or calciner together with the oxygen from the bioreactor as the gas fed to the kiln and/or calciner for combustion of the fuel. 11112131212111213121211121312122124142434. A process for operating a cement or lime plant comprising a cement or lime kiln ( , , , ) and a calciner ( , ) in case of a cement plant , wherein heat is generated by combustion of a fuel in the kiln ( , , , ) and/or in the calciner ( , ) , wherein a gas fed to the kiln ( , , , ) and the calciner ( , ) or to the calciner ( , ) for combustion of the fuel contains an oxygen rich exhaust gas from a bioreactor ( , , , ) containing photoautotrophic organisms.2121212121212. The process according to claim 1 , wherein an exhaust gas from the kiln ( claim 1 , ) and/or calciner () is partly recycled into the kiln ( claim 1 , ) and/or calciner () claim 1 , operating the kiln ( claim 1 , ) and/or calciner () in the oxyfuel mode.312121221212121241424. The process according to claim 2 , wherein the gas fed to the the kiln ( claim 2 , ) and the calciner ( claim 2 , ) or to the calciner ( claim 2 , ) consists of the recycled exhaust gas from the kiln ( claim 2 , ) and/or calciner ( claim 2 , ) and the oxygen rich exhaust gas from the bioreactor ( claim 2 , claim 2 , ).4111213121211121312124142434. The process according to claim 2 , wherein the exhaust gas from the kiln ( claim 2 , claim 2 , claim 2 , ) and/or calciner ( claim 2 , ) that is not recycled into the kiln ( claim 2 , claim 2 , claim 2 , ) and/or calciner ( claim 2 , ) is passed into the bioreactor ( ...

SYSTEM HAVING A FURNACE AND METHOD FOR OPERATING SUCH A SYSTEM

A method of operating a plant having a furnace including at least two vertical shafts connected by an overflow duct, wherein at least one burner is arranged above the overflow duct in each case such that the burner gases therefrom flow downward in burning operation of the respective shaft. A cooling gas supply is provided beneath the overflow duct in each case such that, in combination with the operation of a burner in the burner-operated shaft, the burner gas flowing downward is deflected in the direction of the overflow duct by the cooling gas ascending in the burner-operated shaft, and a supply of cooling gas is adjusted such that the temperature of the burner charge through which the burner gas flows at least in the burner-operated shaft is kept above the deacidification temperature thereof. 113.-. (canceled)14. A method of operating a plant having a furnace comprising:two vertical shafts,an overflow duct connecting the two vertical shafts,a burner disposed in each of the two vertical shafts above the overflow duct and configured such that combustion gases therefrom flow downward in burning operation of each of the two vertical shafts, anda cooling gas supply disposed in each of the two vertical shafts beneath the overflow duct and configured such that, in combination with the operation of each respective burner, the combustion gas flowing downward is deflected in the direction of the overflow duct by ascending cooling gas from the cooling gas supply,the method comprising:adjusting a supply of the cooling gas such that the temperature of a burner charge through which the burner gas flows at least in each of the two vertical shafts is kept above the deacidification temperature thereof.15. The method of claim 14 , wherein the temperature of the burner charge through which the burner gas flows is kept above 800° C.16. The method of claim 14 , further comprising discharging the burner charge from the two vertical shafts and transferring the discharged burner charge ...

PROCESS FOR PRODUCING HIGH GRADE HYDROMAGNESITE AND MAGNESIUM OXIDE

The present invention provides a process for producing high purity hydromagnesite from a source of magnesium chloride. The process involves preparation of a magnesium chloride brine of a specific concentration, which is ammoniated at a specific temperature range, followed by carbonation, while maintaining the reaction at a specific temperature range to form a hydromagnesite precipitate. The product can be calcined to generate high purity magnesium oxide compounds. 1. A method of preparing hydromagnesite from a source of magnesium chloride , comprising:a) preparing a feedstock brine solution from said source of magnesium chloride, wherein said feedstock brine solution comprises magnesium chloride and calcium chloride;b) mixing a sulfate salt into said feedstock brine solution to convert said calcium chloride into a calcium sulfate precipitate;c) removing said calcium sulfate precipitate from said feedstock brine solution;d) ammoniating said feedstock brine solution produced in step c) at a temperature range of about 20° C. to about 60° C. to convert magnesium chloride at least partially into magnesium hydroxide and to form ammonium chloride; ande) carbonating said magnesium hydroxide while maintaining the reaction temperature at about 20° C. to about 120° C. to form a hydromagnesite precipitate.2. The method of claim 1 , wherein said feedstock brine solution has a specific gravity from about 1.2 to about 1.35.3. The method of claim 1 , wherein said feedstock brine solution contains from about 20% to about 35% by weight magnesium chloride in water.4. The method of claim 1 , further comprising adjusting a magnesium chloride concentration of said brine solution to be in a range of about 10% to about 20% by weight magnesium chloride in water claim 1 , after removing calcium sulfate.5. The method of claim 1 , wherein said carbonation is carried out in multiple steps.6. The method of claim 1 , wherein said sulfate salt is magnesium sulfate or sodium sulfate claim 1 , ...

PROCESS FOR PRODUCING HIGH GRADE HYDROMAGNESITE AND MAGNESIUM OXIDE

The present invention provides a process for producing high purity hydromagnesite from a source of magnesium chloride. The process involves preparation of a magnesium chloride brine of a specific concentration and reacting with sodium carbonate, while maintaining the reaction at a specific temperature range to form a hydromagnesite precipitate. The product can be calcined to generate high purity magnesium oxide compounds. 1. A method of preparing hydromagnesite from a source of magnesium chloride , comprising:a) preparing a feedstock brine solution from said source of magnesium chloride, wherein said feedstock brine solution comprises magnesium chloride and calcium chloride;b) mixing a sulfate salt into said feedstock brine solution to convert said calcium chloride into a calcium sulfate precipitate;c) removing said calcium sulfate precipitate from said feedstock brine solution; andd) mixing said brine solution produced in step c) with sodium carbonate, while maintaining the temperature at about 20° C. to about 120° C. to form a hydromagnesite precipitate.2. The method of claim 1 , wherein said feedstock brine solution has a specific gravity from about 1.2 to about 1.35.3. The method of claim 1 , wherein said feedstock brine solution contains from about 20% to about 35% by weight magnesium chloride in water.4. The method of claim 1 , further comprising adjusting a magnesium chloride concentration of said brine solution to be in a range of about 10% to about 20% by weight magnesium chloride in water claim 1 , after removing calcium sulfate.5. The method of claim 1 , wherein said sodium carbonate is added as a solution of about 5% to about 15% by weight in water.6. The method of claim 1 , wherein said sulfate salt is magnesium sulfate or sodium sulfate and is provided as a solid or a concentrated solution in water.7. The method of claim 1 , wherein said mixing of said sulfate salt is carried out at a temperature of about 50° C. to about 100° C.8. The method of claim 1 ...

Producing Calcium Phosphate Compositions

The disclosure features compositions that include a material featuring three calcium phosphate phases that form one or more integral units of a solid, where a first one of the three phases includes one or more regions formed of hydroxyapatite, a second one of the three phases includes one or more regions formed of β-tricalcium phosphate, a third one of the three phases includes one or more regions formed of amorphous calcium phosphate, and where at least some of the regions corresponding to the first, second, and third phases contact one another in the one or more integral units of the solid.

SELF-HEALING AND DURABLE CEMENT PASTE, MORTARS, AND CONCRETES

Admixture for cementitious building materials can provide a self-healing mechanism to improve material longevity. In certain embodiments, the admixture can include the combination of both a quicklime-based replacement for fine and coarse aggregates and an SCM replacement for OPC in standard mortar and concrete. 1. A composition comprising:standard mortar including an ordinary Portland cement (OPC), a supplementary cementitious material (SCM), fine aggregate and calcined lime, wherein a portion of the OPC of an original formulation has been replaced with the supplementary cementitious material (SCM) and a portion fine aggregate of the original formulation has been replaced with the calcined lime.2. The composition of claim 1 , wherein the standard mortar includes 7-31 wt % of OPC and 69-93 wt % of fine aggregate.3. The composition of claim 2 , wherein up to 30% of OPC is replaced with SCM.4. The composition of claim 2 , wherein up to 45% of fine aggregate is replaced with calcined lime.5. The composition of claims 1 , wherein the SCM includes volcanic ash claims 1 , fly ash claims 1 , granulated blast furnace slag claims 1 , silica fume claims 1 , metakaolin claims 1 , rice husk ash claims 1 , calcined clay claims 1 , brick claims 1 , cocciopesto claims 1 , or other ceramic materials.6. A method of making an admixture for cementitious building materials comprising:making calcined lime by calcining calcium carbonate at temperatures between from 600° C. and 1450° C.;crushing, grounding or milling and sieving the calcined lime; andretaining particles between 150 microns and 4 mm for admixture.7. The method of claim 6 , further comprising replacing fine aggregate with calcined lime up to 45% in standard mortar.8. The method of claim 6 , further comprising replacing OPC with SCM up to 30% in standard mortar.9. The method of claim 7 , wherein the standard mortar includes 7-31 wt % of OPC and 69-93 wt % of fine aggregate.10. The method of claim 6 , calcining calcium ...

Process and system for reducing ringing in lime kilns

This application discloses exemplary processes and systems for reducing mineral ring accumulation in calcination kiln. The processes and systems comprise inserting non-condensable gases (“NCGs”) in a preheating zone of a calcination kiln, upstream of the burner end. The pre -heating zone may be characterized by temperatures ranging from 1,300° F. to 1,750° F. The system may desirably comprise a plenum for inserting the NCGs into the rotating calcination kiln at the pre-heating zone.

METHOD AND SHAFT FURNACE FOR BURNING CARBON-CONTAINING MATERIAL IN A SHAFT FURNACE

A shaft furnace for firing carbonate-containing material may include, in a flow direction of the material, a preheating zone, a firing zone, a cooling zone, and a material outlet for discharging the material from the shaft furnace. Burner lances project into the firing zone. At least one burner lance has a first penetration depth into the firing zone and at least one further burner lance has a second penetration depth into the firing zone that is greater than the first penetration depth. A primary air conduit may be configured to convey combustion air and may be connected to at least one burner lance. An oxygen conduit for conveying oxygen into the firing zone may be arranged such that oxygen flows from the oxygen conduit at least one burner lance having the second penetration depth. 117.-. (canceled)18. A shaft furnace for firing material that contains carbonate , the shaft furnace comprising:in a flow direction of the material, a preheating zone, a firing zone, a cooling zone, and a material outlet for discharging the material;burner lances that project into the firing zone, wherein a first of the burner lances has a first penetration depth into the firing zone and a second of the burner lances has a second penetration depth into the firing zone that is greater than the first penetration depth; a first primary air conduit for conveying combustion air, the first primary air conduit being connected to the first burner lance, and', 'a second primary air conduit for conveying combustion air, the second primary air conduit being connected to the second burner lance; and, 'a primary air conduit comprisingan oxygen conduit for conveying oxygen into the firing zone, wherein the oxygen conduit is disposed such that oxygen is configured to flow from the oxygen conduit to the second burner lance, wherein the oxygen conduit is connected exclusively to the second primary air conduit so that oxygen is configured to flow from the oxygen conduit into the second primary air ...

Direct gas capture systems and methods of use thereof

The present disclosure provides systems and methods that combine direct capture of one or more moieties from a gaseous mixture with one or both of calcium oxide production and power production. The systems and methods can utilize combinations of a capture unit, a regeneration unit, a calcination unit, a slaking unit, a heat exchange unit, a separation unit, and a power production unit. The present disclosure provides the ability to remove carbon dioxide and other moieties from air or other gaseous mixtures in a truly carbon negative manner by utilizing electricity from a power production unit that is operated in a carbon neutral or carbon negative manner and simultaneously provide useful products, such as calcium oxide and calcium hydroxide.

METHOD FOR PREPARING LIGHT MAGNESIUM OXIDE AND CALCIUM OXIDE AND APPLICATION THEREOF FOR PREPARING CALCIUM-MAGNESIUM COMPOSITE EXPANDING AGENT

Disclosed are a method for separately preparing light magnesium oxide and calcium oxide by using dolomite and an application thereof in preparation of a calcium-magnesium composite expanding agent. In the method for preparing light magnesium oxide and calcium oxide, based on the difference in decomposition temperature between magnesium carbonate and calcium carbonate during the calcination and decomposition of dolomite and the difference in the weight of the materials after decomposition, the effective separation of magnesium oxide and calcium oxide is realized by a one-step method, thus separately preparing light magnesium oxide and light calcium oxide. The calcium-magnesium composite expanding agent is prepared by using the foregoing light magnesium oxide and calcium oxide. On the one hand, the present invention solves the problem of the limited origin of the light magnesium oxide raw material of the magnesium expanding component in the calcium-magnesium composite expanding agent. 1. A method for preparing light magnesium oxide and calcium oxide , comprisingpreparing light magnesium oxide and calcium oxide based ona difference in decomposition temperature between magnesium carbonate and calcium carbonate during the calcination and decomposition of dolomite;and a difference in weight of materials after decomposition,separating magnesium oxide and calcium oxide effectively in a suspension reaction tower by a one-step method according to a principle of negative pressure air separation, thus separately preparing light magnesium oxide and light calcium oxide.2. The method according to claim 1 , wherein the suspension reaction tower is composed of two layers of calcination belts claim 1 , upper and lower calcination belts claim 1 , which are separated by an airflow separator.3. The method according to claim 2 , wherein an airflow separator of the suspension reaction tower refers to a specific gravity air separation device which is placed inside the suspension reaction ...

METHOD FOR UTILIZING LIGNIN SEPARATED FROM BLACK LIQUOR AS LIME-KILN FUEL

A method of utilizing lignin-containing material separated from spent kraft pulping liquor including: acidifying the liquor to a pH not less than seven thereby precipitating solid particles, separating precipitated solid particles from the accompanying liquid, and subjecting the separated precipitated solid particles to a washing process in which: the separated precipitated solid particles are washed with an aqueous medium or aqueous media in one or more washing steps, in each one of the washing steps, the aqueous washing medium contains, in a dissolved form, significant amounts of one or more added sodium salts, and a combined concentration of the added sodium salts in the washing medium in each of the washing step exceeds three percent by weight; and utilizing as fuel in a lime kiln at least part of the washed lignin-containing material is utilized as fuel in a lime kiln of a pulp mill. 1. A method of utilizing lignin-containing material separated from spent kraft pulping liquor comprising:acidifying the liquor, or fraction thereof, to a pH not less than 7 thereby precipitating solid particles,separating the precipitated solid particles from the liquor or a fraction thereof, and i. the separated precipitated solid particles are washed with an aqueous medium or aqueous media in one or more washing steps,', 'ii. in each of the one or more washing steps, the aqueous washing medium or media contains, in a dissolved form, significant amounts of one or more added sodium salts, and', 'iii. a combined concentration of the one or more added sodium salts in the aqueous washing medium or media in each of the washing step exceeds three percent (3%) by weight;, 'subjecting the separated precipitated solid particles to a washing process in whichutilizing as fuel in a lime kiln at least part of the washed, separated precipitated solid particles.2. The method according to claim 1 , wherein the combined concentration of the one or more added sodium salts in the aqueous washing ...

METHODS AND SYSTEMS FOR PROVIDING IMPROVED CEMENT INCORPORATING METAL OXIDES AND HYDROXIDES

Cement and concrete compositions are produced via metal hydroxides and metal oxides isolated from aqueous sources such as seawater or wastewater. Aqueous solutions are electrolyzed to produce an alkaline component stream having an elevated pH, which when mixed with mineralized seawater causes metal ions dissolved therein to precipitate out in the form of metal hydroxides such as Mg(OH)and Ca(OH). These metal hydroxide products are then utilized as feedstocks for production of cement and concrete structural elements, or are converted to metal oxides suitable for the same purpose. The hydroxide products are then subjected to pressure and prolonged exposure to carbon dioxide to accelerate carbonation of the hydrated product. The resulting carbonates exhibit sufficient compressive strength for use in making structural components for construction, while reducing or eliminating the carbon footprint associated with traditional methods of cement and concrete manufacturing. Excess demineralized alkaline component can be recycled for additional electrolysis, or returned to a neutral pH for use in water desalination processes or even returned to the environment. 1. A method of making a cementitious composition , comprising:providing an aqueous source of metal ions;providing an aqueous demineralized feedstream to an electrochemical device;isolating an alkaline component and an acidic component from the aqueous demineralized feedstream;mixing the aqueous source of metal ions and the alkaline component to form an aqueous mixture; andprecipitating metal hydroxides from the aqueous mixture to form a metal hydroxide product and a demineralized alkaline component, the metal hydroxide product including metal ions from the aqueous source of metal ions.2. The method according to claim 1 , wherein the aqueous source includes seawater claim 1 , brine claim 1 , brackish water claim 1 , wastewater claim 1 , or combinations thereof.3. The method according to claim 1 , further comprising: ...

Process and system for producing commercial quality carbon dioxide from recausticizing process calcium carbonates

The invention features methods and systems for recovering carbon dioxide, for producing commercial quality carbon dioxide (CO 2 ) of 90% to +99% purity using, wet calcium carbonate lime mud produced in a recausticizing process that also produces caustic soda, for instance, Kraft paper pulp mill lime mud (a.k.a., “lime mud”) as a feedstock to a multi-stage lime mud calcination process. This process may be fueled with low, or negative cost “carbon-neutral” fuels such as waste water treatment plant (WWTP) sludge, biomass, precipitated lignins, coal, or other low cost solid fuels. High reactivity, high-quality calcined lime mud (a.k.a. re-burned lime, or calcine), required in the Kraft paper pulp mill's recausticizing process is also produced, and superheated high pressure steam and hot boiler feed-water is generated and exported to the mill's steam distribution and generation system as well as hot process water for use in the mill's manufacturing operation. The system for calcining calcium carbonate lime mud produced from a recausticizing manufacturing operation and converting it to calcined lime mud and CO 2 comprises a calciner and a combustor linked by a moving media heat transfer (MMHT) system or apparatus. The MMHT system or apparatus thermally links separate fluid bed combustion (exothermic) and calcination (endothermic) stages with a solid particulate media. The system further comprises a flash dryer or spray dryer that utilizes exhausted enthalpy from the calcination stage.

OXYFUEL CLINKER PRODUCTION WITHOUT RECIRCULATION OF THE PREHEATER EXHAUST GASES

Processes and plants for producing cement clinker, wherein no recirculation of preheater exhaust gases occurs and the ratio of solid fed in to exhaust gas in the preheater is set to greater than 1.0 kg of solid to gas. 119.-. (canceled)20. A process for producing cement clinker , comprising:preheating of a starting material to a calcination temperature,performing calcination of the preheated starting material in a calciner,firing of the calcined starting material in a rotary furnace to produce cement clinker,cooling of the cement clinker,introducing an oxygen-containing gas having a proportion of 15% by volume or less of nitrogen and a proportion of 50% by volume or more of oxygen into the calciner,wherein no gases from the rotary furnace are fed to the calciner,providing at least a first and a second cyclone preheater configured for preheating and connected to one another in a cascade-like manner,material transfer means and/or gas transfer means for transferring material between the cyclone preheaters, andwherein recirculation of the preheater exhaust gases does not occur, andwherein the ratio of starting material fed in relative to exhaust gas in said preheating step is set to greater than 1.3 kg of starting material to 1.0 kg of exhaust gas.21. The process of further comprising introducing oxygen-containing gas into the rotary furnace.22. The process of wherein the cyclone preheaters are multistage one-train or multitrain cyclone preheaters.23. The process of wherein the cyclone preheaters are two-train cyclone preheaters having from two to six stages.24. The process of wherein crossing of meal streams but no crossing of the gas streams occurs after each stage between the cyclone preheaters of a multitrain cyclone preheater.25. The process of wherein preheating occurs with involvement of at least one carbonator.26. The process of wherein a cyclone preheater having a carbonator of a second preheater train is supplied with exhaust gases coming from the rotary ...

OXY-CALCINATION PROCESS

Method and installation for calcining cement raw meal in a calciner whereby fuel and a calciner oxidant having an oxygen content of at least 30% vol are introduced into the calciner so as to generate either an oxidant-lean zone or a fuel-lean zone in the calciner located between the lowermost fuel inlet level and the lowermost oxidant inlet level of the calciner, between 50% and 100% by weight of the raw meal being supplied to the calciner upstream of and/or within the oxidant-lean, respectively the fuel-lean zone. 1. A calcination installation for calcining cement raw meal , the installation comprising a calciner having a total calciner height and extending between a bottom end and a top end in a longitudinal direction , the calciner comprising: a lowermost fuel inlet level at which one or more first fuel inlets are located;', 'a flue gas outlet located at the top end of the calciner;', 'a flue-gas recycle inlet located at the bottom end of the calciner; and', the lowermost oxidant inlet level is located above the lowermost fuel inlet level at an oxygen-lean zone distance Do>0 from said lowermost oxidant inlet in the longitudinal direction, at least one raw meal inlet being located below or at the lowermost oxidant inlet level in the longitudinal direction, or', 'the lowermost fuel inlet level is located above the lowermost oxidant inlet level at a fuel-lean zone distance Df>0 from the lowermost oxidant inlet level in the longitudinal direction, at least one raw meal inlet being located below or at the lowermost fuel inlet level in the longitudinal direction., 'one or more raw meal inlets, wherein], 'a lowermost oxidant inlet level at which one or more first oxidant inlets are located, and optionally one or more second oxidant inlet levels located above the lowermost oxidant inlet level in the longitudinal direction and at which one or more second oxidant inlets are located, said first oxidant inlets and, if present, said second oxidant inlets being connected to a ...

BIOACTIVE MATERIAL

A process and apparatus for manufacture of biocide products are described. The biocide properties arise from the caustic calcined powder, from carbonates such as such as magnesite and dolomite, and from hydroxides such as brucite. The method of manufacture is based on the production of high surface area oxide particles using an indirectly heated counterflow reactors for specifically calcining the carbonates and the hydroxides without significant sintering. The biocide products may be a powder or a hydrated slurry. A hydrated slurry is preferred for agricultural applications as a spray. For aquaculture applications, the products have a preferred particle size distribution to impact the aquatic and benthic ecosystems, and a Ca/Mg ratio that promotes the growth of the cultivates species when applied as a powder or a slurry. For applications such as a marine paint, the powder product or the slurry product is mixed with various agents to form a setting coating, and is applied to the infrastructure that is otherwise subject to biofilm growth. 1. A process for producing a biocide powder , comprising the steps of:a. selecting one or more carbonate compounds with a predetermined calcium/magnesium ratio;b. grinding the carbonate compounds to produce a carbonate powder with a first predetermined particle size distribution;c. selecting a magnesium hydroxide compound;d. grinding the hydroxide compound to produce a hydroxide powder with a second particle size distribution;e. calcining the carbonate powder in an externally heated counterflow flash calciner at a first temperature to produce a calcined mixture having a surface area sufficiently high enough to exhibit bioactivity;f. calcining the hydroxide powder in an externally heated counterflow flash calciner at a second temperature to produce a calcined oxide with a surface area sufficiently high enough to exhibit bioactivity; andg. blending the calcined mixture and the calcined oxide in a predetermined proportions.2. The ...

System and Method for the Calcination of Minerals

A system and method for the calcination of minerals. The system comprises a vertically disposed reactor segment configured to impart horizontal forces on particles passing through the reactor segment in a vertical direction; an injector unit for receiving granular feedstock, the injector unit being disposed at a top portion of the reactor segment, whereby granules of the feedstock move through the reactor segment in a granular flow under at least one of a group consisting of a force of steam, gravitational force and a centrifugal force; a reactor heat exchange unit thermally coupled to a wall of the reactor segment for providing heat to the flowing granules inside the reactor segment through heat transfer through the wall of the reactor segment; one or more inlets formed in the reactor segment for introducing a superheated gas into the reactor segment to create conditions of a gas-solid multiphase system; and one or more exhaust openings formed in the retort segment such that gas products are at least partially flushed from the reactor segment under the flow of the superheated gas from the inlets to the exhaust openings.

METHOD FOR CHANGING HEAT TRANSFER BED DEPTH IN PACKED BED HEAT EXCHANGERS

A limestone preheater which segregates material according to particle size and further provides for material bed depth adjustment, preferably during operation. 1. A preheating apparatus for particulate material comprising:a containment vessel;a floor to said containment vessel having a material outlet for discharging preheated particulate material out of the apparatus;a vertically oriented outer annular preheating section which circles the material outlet;a feed pipe having a material entry and material exit, said feed pipe extending vertically downward into the preheating section to deliver particulate material into the annular preheating section to form a material pile in the preheating section extending above the floor, said feed pipe being adaptable to be extended or retracted within the preheating section to thereby lower or raise the material pile;means to deliver hot gas into the annular preheating section; andmeans to discharge said gas from the annular preheating section after the gas has passed through the particulate material in the section.2. The preheating apparatus of wherein the feed pipe is comprised of a plurality of interfitting pipe sections.3. The preheating apparatus of wherein the means to extend and retract the feed pipe can be operated while the preheater is in operation.4. The preheating apparatus of further comprising feed classifier means positioned underneath the feed pipe material exit adaptable to classify the material as said material exits the feed pipe. This application claims the benefit of U.S. Provisional Application No. 61/581,285, filed Dec. 29, 2011.This invention relates to a method and apparatus for preheating particulate material and, more particularly, to an improved method and apparatus for more efficiently preheating particulate material.Although the present invention is applicable generally to the preheating of particulate material, it is particularly applicable to the preheating and precalcining of limestone by flowing ...

SYSTEM FOR THE PRODUCTION OF FINE LIME

The present invention is directed to a method of continuously calcining a limestone particle mix comprising a fine fraction of limestone particles and a coarser fraction of limestone particles. The limestone particles heat treated in a flash calciner in which the mixture is entrained and heated in process gas for an amount of time sufficient to fully calcine the fine fraction but not the coarser fraction. The process gas is separated from the heated limestone mixture. The mixture is directed to a retention vessel in which the mixture is retained for an amount of time sufficient to fully calcine the coarser fraction utilizing the process heat present in the limestone mixture. No external heat needs to be added to the retention vessel during the retention step to promote calcination. 1. A method of continuously calcining a limestone particle mix comprising a fine fraction of limestone particles and a coarser fraction of limestone particles , said method comprising(a) heat treating the limestone particles in a flash calciner in which the particles are entrained and heated in process gas for an amount of time sufficient to fully calcine the fine fraction but not the coarser fraction;(b) separating the heated limestone particles from the process gas;(c) maintaining the separated heated limestone particles in a retention vessel for an amount of time sufficient to fully calcine the coarser fraction by transferring the heat contained in the fine fraction of particles to the coarser fraction of particles.2. The method of wherein the particles in the fine fraction have a nominal diameter up to about 1 mm and the particles in the coarser fraction have a nominal diameter of from greater than 1 mm to about 10 mm.3. The method of wherein the particles in the coarser fraction have a nominal diameter of from greater than 1 mm to about 4 mm.4. The method of wherein the heated limestone mixture is maintained at its minimum fluidization velocity within the retention vessel.5. The ...

OXY-CALCINATION PROCESS

Method and installation for calcining cement raw meal in a calciner whereby fuel and a calciner oxidant having an oxygen content of at least 30% vol are introduced into the calciner so as to generate either an oxidant-lean zone or a fuel-lean zone in the calciner located between the lowermost fuel inlet level and the lowermost oxidant inlet level of the calciner, between 50% and 100% by weight of the raw meal being supplied to the calciner upstream of and/or within the oxidant-lean, respectively the fuel-lean zone.

SYSTEMS AND METHODS FOR REMOVAL OF LEAD AND/OR OTHER CONTAMINANTS FROM LIMESTONE AND RESULTANT CALCIUM OXIDE AND HYDRATED LIME

Systems and methods for impurity removal to limestone using modifications to the typical calcination process of turning calcium carbonate into calcium oxide. Specifically, substantially increasing the temperature to 1100° C. or higher and increasing soak time can result in reductions in certain undesirable impurities, particularly with regards to lead and lead compounds. 1. A method of calcining limestone comprising:providing limestone including calcium carbonate and impurities, said impurities including lead; andcalcining said limestone to produce a calcium oxide composition, said calcining occurring at a temperature of 1100° C. or higher and having a soak time greater than 1 hour;wherein an amount of said lead in said calcium oxide composition is reduced compared to an amount of said lead in said limestone.2. The method of claim 1 , wherein said calcining occurs at a temperature of 1200° C. or greater.3. The method of claim 1 , wherein said calcining occurs at a temperature of 1300° C. or greater.4. The method of claim 1 , wherein said calcining occurs at a temperature of 1400° C. or greater.5. The method of claim 1 , wherein said calcining occurs at a temperature of 1500° C. or greater.6. The method of claim 1 , wherein said calcining occurs at a temperature of 1600° C. or greater.7. The method of wherein said soak time is 2 hours or greater.8. The method of wherein said amount of said lead in said calcium oxide is no more than 75% said amount of said lead in said limestone.9. The method of wherein said amount of said lead in said calcium oxide is no more than 55% said amount of said lead in said limestone.10. The method of wherein said amount of said lead in said calcium oxide is no more than 25% said amount of said lead in said limestone.11. The method of wherein said amount of said lead in said calcium oxide is undetectable.12. A method of calcining limestone comprising:providing limestone including calcium carbonate and impurities, said impurities including ...

A FLASH CALCINER

A method and system for producing nano-active powder materials. The method can be used with a reactor system comprising stages in which input particles flow under gravity progressively through stages of the reactor. A powder injector first stage in which ground input precursor powder is injected into the reactor. An externally heated preheater stage may be in the reactor, in which the precursor powder is heated to a temperature of calcination reaction. An externally heated calciner stage in the reactor, in which primary precursor volatile constituents can be rapidly removed calcination reactions as a high purity gas stream to produce the desired nano-active product. A post-processing reactor stage in which there is a change of the gas stream composition to produce the desired hot powder product by virtue of the nano-activity of the first powder material. A powder ejector stage in which the hot powder product is ejected from the reactor. 1. A method for producing nano-active powder materials in a reactor comprising stages in which input particles flow downwards under gravity progressively through the stages:a. a powder injector first stage in which ground input precursor powder is injected into the reactor; andb. an externally heated preheater stage in which the precursor powder is heated to a temperature of calcination reaction; andc. externally heated calciner reactor stage in which primary precursor volatile constituents are rapidly removed by the calcination reaction as a high purity gas stream to produce the desired nano-active product; andd. a post-processing reactor stage in which there is a change of the gas stream composition to produce the desired hot powder product from the nano-activity of the first powder material; ande. a powder ejector stage in which the hot powder product is ejected from the reactor; andf. a heat exchanger is used to transfer heat from the hot solids from the powder ejector stage to a first portion of the precursor powder, such that ...

Process for Calcining Mineral Rock in a Regenerative Parallel-Flow Vertical Shaft Furnace, and Furnace Used

Process for calcining mineral rock in a regenerative parallel-flow vertical shaft furnace, containing at least two shafts () interconnected by a gas transfer channel (), each shaft operating alternately in firing mode and in preheating mode, the firing mode comprising a combustion of fuel in the presence of air so as to obtain a firing of the rock to give calcined rock, an emission of combustion gases, and a passage of these gases from one shaft to the other by means of said channel (), the preheating mode comprising a heat exchange between said rock and said combustion gases from said channel (), this process additionally comprising an injection of supplementary air into said channel () with oxidation of unburnt products contained in the combustion gases passing through this channel. 2: Method according to claim 1 , wherein the gas containing oxygen supplied to a shaft in firing mode is in the form of a gas containing primary oxygen claim 1 , conveyed simultaneously to the fuel claim 1 , and a gas containing secondary oxygen introduced at the top of this shaft through the rock to be fired.3: Method according to claim 1 , wherein said oxidation of unburnt products is carried out at an oxidation temperature that is high enough to allow for an oxidation of carbon monoxide and low enough to prevent a thermal degradation of the molecules of dinitrogen into atomic nitrogen.4: Method according to claim 3 , wherein said oxidation temperature is between 800 C and 1 claim 3 ,300 C.5: Method according to claim 1 , wherein the quantity of additional oxygen injected into said gas transfer channel using said gas containing the additional oxygen is between 0.1 and 50 times the stoichiometric quantity of oxygen calculated based on the quantity of CO measured at the outlet of the furnace in the absence of this gas containing additional oxygen.6: Method according to claim 1 , wherein the gas containing the additional oxygen has at the time of the injection a temperature between ...

METHOD AND ARRANGEMENT FOR BURNING LIME MUD

An arrangement for burning lime mud into lime in a lime kiln. The lime mud flows counter-currently to flue gases from a feed end to a firing end and the fuel used is flue gas that is produced by gasifying a fuel in the presence of combustion air in a gasifier. The combustion air for gasification is preheated with heat generated in lime mud combustion. The arrangement is provided with a conduit between the lime kiln and the gasifier for leading air from the lime kiln into the gasifier as combustion air. At least a portion of the combustion air for gasification is preheated with heat generated in the lime mud combustion so that air is led into cooling of lime obtained in the combustion and further into the kiln, from or through the firing end of which air is taken into the gasification. 1. A lime mud combustion plant comprising:a lime kiln having a rotary drum with a feed end and a firing end;a lime kiln burner aligned with the firing end of the rotary drum;a gasifier configured to produce fuel gas using combustion air;a fuel gas conduit coupled to the gasifier and forming a passage for fuel gas produced by the gasifier flowing to the lime kiln burner, andat least one conduit coupled to the lime kiln and the gasifier, wherein the at least one air conduit forms a passage providing the combustion air to the gasifier, wherein an air inlet to the at least one air conduit is configured to receive air from or through the firing end of the lime kiln.2. The lime mud combustion plant according to claim 1 , wherein the air inlet to the at least one air conduit extends into an interior of the lime kiln at least to the depth of a dam of the kiln.3. The lime mud combustion plant according to claim 1 , further comprising a cooling conduit adjacent a cooler section of the lime kiln and the cooling conduit is coupled to the at least one air conduit such that air passes through the cooling conduit into the at least one air conduit.4. The lime mud combustion plant according to claim 1 ...

CLOSED LOOP CONTROL WITH CAMERA DETECTION OF PEBBLE SIZE OF LIME PARTICLES TO AMELIORATE LIME KILN RINGING and IMPROVE UPTIME and OPERATING EFFICIENCY

An improved lime mud recycling system including a camera proximate the kiln outlet imaging the granular lime and providing outlet images of the granular lime exiting the kiln, a processor analyzing the outlet images of the granular lime and providing pebble size distributions for the granular lime exiting the kiln, as well as a controller communicating with the processor comparing the pebble size distribution of the granular lime exiting the kiln with predetermined prescribed operating parameters for pebble size distributions for the granular lime exiting the kiln and issuing (I) a notification and/or (II) a control signal prompting remedial action when the pebble size distributions for the granular lime exiting the kiln are outside of the predetermined prescribed operating parameters.

Method of Manufacturing Recycled Asphaltic and Asphaltic Limestone Powder Pellets and Shapes through Densification

This invention relates to manufacturing briquettes, pellets and shapes from recycled asphaltic limestone powder derived from waste residential roofing products. Briquettes and pellets are manufactured through a densification process at varying temperatures, creating recycled asphalt pellets, asphalt limestone pellets and bio mass and coal fines briquettes. Various shapes, including curbs and posts, are manufactured through heat and pressure in molds. Seawalls, walkways and wall panels are manufactured by blending asphaltic limestone powders with polymer resins and extruded or pultruded into shapes. 1. A method of manufacturing an asphalt briquette or pellet , the method comprising:(a) obtaining recycled asphaltic limestone powder less than about 2380 microns in size with a mean size of less than about 150 microns, and(b) densifying the recycled asphaltic limestone powder by applying specific and high pressure, resulting in the formation of a briquette or pellet.2. The method of claim 1 , wherein the briquette or pellet comprises(a) less than 20% of materials other than limestone or asphalt,(b) asphalt in an amount ranging from about 10 wt % to about 50 wt %, and(c) limestone in an amount ranging from about 50 wt % to about 90 wt %.3. The method of claim 2 , wherein the materials other than limestone or asphalt are selected from the group consisting of granules claim 2 , trap rock claim 2 , fiberglass powder and aggregates4. The method of claim 1 , wherein the recycled asphaltic limestone powder contains less than 10% granules.5. An asphalt briquette or pellet made according to the process of .6. The briquette of claim 5 , wherein the asphaltic limestone powder btu/lb. content ranges from 4 claim 5 ,000-12 claim 5 ,000 and the moisture content is less than 3%.7. A fuel source comprising the asphalt briquette of claim 5 , in combination with either a bio-mass or coal fines.8. The fuel source of claim 7 , which is stabilized for shipping and storage.9. The fuel source ...

CARBON DIOXIDE PRODUCTION

Apparatus for the production of carbon dioxide from limestone includes a nuclear energy source () arranged to generate electricity and a rotary kiln (). The rotary kiln () has an inlet () for the introduction of limestone and an outlet () for the release of carbon dioxide. An electrical resistance heating element () disposed within the kiln () is arranged to be supplied with electricity derived from the nuclear energy source () to raise the temperature of the element () for transfer of heat to the interior of the rotary kiln (). Limestone in the rotary kiln () is thereby heated to a temperature sufficient for the release of carbon dioxide. 1. A method for producing carbon dioxide from limestone comprising the steps of:a) heating an electrical resistance heating element disposed within a rotary kiln, to raise the temperature within the kiln, using electricity derived from a nuclear energy source;b) introducing limestone into the rotary kiln through an inlet thereto, to be heated by the heating element;c) operating the rotary kiln to rotate about a longitudinal axis; andd) collecting carbon dioxide released from the limestone, through an outlet from the rotary kiln, whereby the heat transferred from the heating element to the limestone and the rotation of the rotary kiln causes calcination of the limestone to produce carbon dioxide.2. A method as claimed in claim 1 , wherein at least one of a water cooled reactor claim 1 , a liquid metal cooled reactor claim 1 , a gas cooled reactor claim 1 , a molten salt reactor and a generation IV reactor is used as the nuclear energy source.3. A method as claimed in claim 1 , wherein the nuclear energy source generates electricity claim 1 , either directly or indirectly claim 1 , and the electricity is supplied to an electrical heating element disposed within the rotary kiln claim 1 , for heating the limestone.4. A method as claimed in claim 1 , wherein the source of nuclear energy produces steam which is fed to a hydrogen plant ...

PROCESS AND APPARATUS FOR MANUFACTURE OF CALCINED COMPOUNDS FOR THE PRODUCTION OF CALCINED PRODUCTS

A process for producing a highly calcined and uniformly calcined product from a feedstock. The process comprising the steps of grinding the feedstock to powder, preheating the powder, and calcining the powder in a reactor plant that comprises a number of reactor segments in which a flash calciner is used in each progressive reactor segment to incrementally react the powder by raising the temperature in each segment. The last segment may be a high-temperature reactor that has a controlled residence time and temperature that may allow controlled finishing of the calcination process to achieve a desired degree of calcination and sintering of the product; and cooling of the product. 1. A process for producing a calcined product from a feedstock , the process comprising:grinding the feedstock to a powder;preheating the powder;calcining the powder in a reactor plant that comprises a plurality of reactor segments each comprising a flash calciner to incrementally react the powder in a calcination process by raising the temperature in each segment;wherein a final segment is a high-temperature reactor having a controlled residence time and temperature to allow controlled finishing of the calcination process to achieve a selected degree of calcination and sintering of the product; andcooling the product.2. The process of claim 1 , wherein the final reactor segment comprises a circulating fluidized bed reactor.3. The process of claim 2 , wherein the circulating fluidized bed reactor is directly heated by a heating gas claim 2 , and an exhaust gas of the circulating fluidized bed is separately treated from exhaust gases of reactors in the earlier reactor segments.4. The process of claim 1 , wherein the plurality of reactor segments comprises at least one intermediate reactor segment externally heated using a gas stream derived from a combustion process.5. The process of claim 1 , wherein the reactor segments are electrically powered.6. The process of claim 1 , wherein the ...

Solution to air pollution

Air pollution includes emissions from two sources: fixed sources and moving sources. A fixed source could be an electric power generation facility or a lime kiln. A moving source can be a tail pipe such as one on an automobile. The fixed source's emissions are redirected downward into a depleted hydrocarbon reserve through an injection well. The moving source is attached to a Carbonator which takes calcium oxide from the lime kiln and carbon dioxide from the moving source to produce calcium carbonate. This removes two sources of air pollution, first the use of the Carbonator system to remove Carbon Dioxide Emissions into the Atmosphere as described in the Application and secondly the total injection of all smokestack effluents into depleted reservoirs, removing the smokestack and in an electrical generating station HVDC transmission lines are run to the displaced smokestack, and is thus a solution to air pollution.

Direct-fired inclined counterflow rotary kilns and use thereof

Method of operating a long direct-fired inclined counterflow rotary kiln for the thermal treatment of material and counterflow rotary kiln adapted for same, whereby material to be treated is introduced into the kiln at the inlet end and treated material is evacuated from the kiln at the outlet end, whereby a main combustion zone extends inside the kiln over a distance of ¼ to ⅓ of the internal length L int of the kiln, whereby a supplementary combustion zone in which supplementary combustion takes place with an oxygen-rich oxidant extends inside the kiln over a distance from the inlet end of at most ¼ of the internal length L int , and whereby no combustion takes place in a heat exchange zone located between the main combustion zone and the supplementary combustion zone.

CALCINER USING RECIRCULATED GASES

A system for making oxide material may comprise a preheating cyclone stage for receiving a solid carbonate material and operating at a temperature less than a calcination temperature of the solid carbonate material, a calcination cyclone stage for heating the preheated solid carbonate material and operating at a temperature of at least the calcination temperature to convert the preheated solid carbonate material to a solid oxide material and carbon dioxide gas, a cooling cyclone stage for cooling the solid oxide material and operating at a temperature less than the calcination temperature to cool the solid oxide material to ambient temperature, a first recirculating system to extract and recirculate a first gas from an outlet of the calcination cyclone stage to an inlet of the calcination cyclone stage zone, and a second recirculating system to extract and recirculate a second gas from the cooling cyclone stage to the preheating cyclone stage. 1. A method of making quicklime in a calciner , the method comprising:preheating a solid carbonate material in a preheating cyclone stage operating at a temperature less than a calcination temperature of the solid carbonate material;heating the preheated solid carbonate material in a calcination cyclone stage operating at a temperature of at least the calcination temperature to generate a solid oxide material and carbon dioxide gas;cooling the solid oxide material in a cooling cyclone stage operating at a temperature to cool the solid oxide material to ambient temperature;extracting a first gas from an outlet of the calcination cyclone stage and a second gas from the cooling cyclone stage; andrecirculating the first gas to an inlet of the calcination cyclone stage and the second gas to the preheating cyclone stage.2. The method of claim 1 , wherein calciner comprises an indirect-fired vertical kiln comprising an electric kiln.3. The method of claim 1 , wherein the solid carbonate material comprises at least one of calcium ...

Process To Convert Reduced Sulfur Species And Water Into Hydrogen And Sulfuric Acid

In an aspect, provided herein are methods for producing sulfuric acid and hydrogen gas, the methods comprising steps of: providing sulfur dioxide formed by thermal conversion of a sulfur-containing species; electrochemically oxidizing said sulfur dioxide to sulfuric acid in the presence of water; and electrochemically forming hydrogen gas via a reduction reaction. In some embodiments, the methods comprise a step of thermally converting said sulfur-containing species to said sulfur dioxide. Systems configured to perform these methods are also disclosed herein. Also provided herein are methods and systems for producing sulfuric acid and hydrogen gas by electrochemically forming the sulfuric acid and the hydrogen gas in a mixture comprising a sulfur material, a supporting acid, and water. Also provided herein are methods and systems for producing a cement material.

Plant and Method for Generating Negative Emissions of CO2

The invention relates to a plant for generating negative emissions of CO. The plant comprises a gasifier , a lime kiln , a separator , and a COpermanent storage . The gasifier is suitable for receiving as input a fuel and for producing as output a high-temperature syngas flow . The lime kiln is suitable for receiving as input carbonate mineral and the high-temperature syngas flow, the lime kiln being further suitable for producing an oxide and for releasing as output a flow of syngas enriched with CO. The separator is suitable for receiving as input a gas flow containing COand for treating it so as to separately provide at least CO. The COpermanent storage is suitable for enclosing along time the CO. The invention also relates to a method for generating negative emissions of CO. 1100. Plant () for generating negative emissions of CO , comprising:{'b': '110', 'a gasifier ();'}{'b': 130', '110, 'a lime kiln () placed downstream of the gasifier ();'}{'b': 150', '130, 'a separator () placed downstream of the lime kiln (); and'}{'sub': '2', 'b': 170', '150, 'a COpermanent storage () placed downstream of the separator ();'}wherein:{'b': 110', '111', '114, 'the gasifier () is suitable for receiving as input a fuel () and for producing as output a high-temperature syngas flow ();'}{'b': 130', '131', '114', '110', '134', '133, 'sub': '2', 'the lime kiln () is suitable for receiving as input carbonate mineral () and the high-temperature syngas flow () produced by the gasifier (), the lime kiln being further suitable for producing an oxide () and for releasing as output a flow of syngas () enriched with CO;'}{'b': 150', '133', '143', '147', '151, 'sub': 2', '2, 'the separator () is suitable for receiving as input a gas flow (; ; ) containing COand for treating it so as to separately provide at least CO(); and'}{'sub': 2', '2, 'b': 170', '150, 'the COpermanent storage () is suitable for enclosing along time the COprovided by the separator ().'}2100110130120114110. Plant () ...

Nano-dispersed powders and methods for their manufacture

Dispersed powders are disclosed that comprise fine nanoscale powders dispersed on coarser carrier powders. The composition of the dispersed fine powders may be oxides, carbides, nitrides, borides, chalcogenides, metals, and alloys. Fine powders discussed are of sizes less than 100 microns, preferably less than 10 micron, more preferably less than 1 micron, and most preferably less than 100 nanometers. Methods for producing such powders in high volume, low-cost, and reproducible quality are also outlined. Such powders are useful in various applications such as catalysts, sensor, electronic, electrical, photonic, thermal, biomedical, piezo, magnetic, catalytic and electrochemical products.

Post-processed nanoscale powders and method for such post-processing

Post-processing methods for nanoparticles are disclosed. Methods for real time quality control of nanoscale powder manufacture are discussed. Uses of post-processed particles and consolidation methods are disclosed. Disclosed methods can enable commercial use of nanoscale powders in wide range of nanotechnology applications.

Post-processed nanoscale powders and method for such post-processing

Post-processing methods for nanoparticles are disclosed. Methods for real time quality control of nanoscale powder manufacture are discussed. Uses of post-processed particles and consolidation methods are disclosed. Disclosed methods can enable commercial use of nanoscale powders in wide range of nanotechnology applications.

DEVICE AND METHOD FOR HEAT TRANSFER

Kiln for the production of calcium oxide

Furnace for producing calcium oxide, comprising a container (2) which internally has a baking chamber (5) provided with a central axis (6) and with a calcination zone (7) for the calcareous material, provided with burners (10, 11), characterised in that it comprises, at said calcination zone, at least a first group of said burners (10) positioned, with the respective outlets (14), substantially at a same first distance (A) from said central axis (6) and at least a second group of said burners (11) positioned, with the respective outlets (14), substantially at a same second distance (B) from said axis (6), said first group of burners (10) being overlapped to said second group of burners (11) relative to the dropping direction of the calcareous material and said second distance (A) being less than said first distance (B).

Parallel flow-counter flow regenerative lime kiln and method for the operation thereof

The method according to the invention for operating a PFR lime kiln comprising at least two shafts, which each have a preheating zone, a firing zone and a cooling zone, and a cross-over channel connecting the two shafts, consists substantially of the following method steps: both shafts are operated alternately as a burning shaft and an exhaust gas shaft, combustion air and fuel are fed to the burning shaft, wherein a corresponding flame length is formed and the hot gases developing in the burning shaft reach the exhaust gas shaft via the cross-over channel, wherein at least one parameter of the hot gases characteristic of the formation of the flame length is determined by a direct or indirect measurement in the region of the cross-over channel, and the ratio of fuel to combustion air is controlled depending on said parameter in order to set a predetermined flame length.

SYSTEMS AND METHODS FOR REMOVAL OF LEAD AND/OR OTHER CONTAMINANTS FROM LIMESTONE AND RESULTANT CALCIUM OXIDE AND HYDRATED LIME

Systems and methods for impurity removal to limestone using modifications to the typical calcination process of turning calcium carbonate into calcium oxide. Specifically, substantially increasing the temperature to 1100° C. or higher and increasing soak time can result in reductions in certain undesirable impurities, particularly with regards to lead and lead compounds. 1. A method of producing calcium hydroxide , the method comprising:providing limestone including calcium carbonate and impurities, said impurities including at least one of: cadmium, cerium, cesium, cobalt, copper, fluoride, lead, lithium, potassium, rubidium, sodium, thorium, or zinc; andcalcining said limestone to produce a calcium oxide composition, said calcining occurring at a temperature of 1200° C. or higher and having a soak time greater than 1 hour;slaking said calcium oxide composition to produce calcium hydroxide;wherein an amount of said impurities in said calcium hydroxide is reduced compared to an amount of said impurities in said limestone.2. The method of claim 1 , wherein said calcining occurs at a temperature of 1300° C. or greater.3. The method of claim 1 , wherein said calcining occurs at a temperature of 1400° C. or greater.4. The method of claim 1 , wherein said calcining occurs at a temperature of 1500° C. or greater.5. The method of claim 1 , wherein said calcining occurs at a temperature of 1600° C. or greater.6. The method of wherein said soak time is 2 hours or greater.7. The method of wherein said amount of said impurities in said calcium hydroxide is no more than 75% said amount of said impurities in said limestone.8. The method of wherein each impurity in said impurities in said calcium hydroxide is no more than 75% of said impurity in said limestone.9. The method of wherein said amount of said impurities in said calcium hydroxide is no more than 55% said amount of said impurities in said limestone.10. The method of wherein each impurity in said impurities in said ...

PROCESS TO CONVERT REDUCED SULFUR SPECIES AND WATER INTO HYDROGEN AND SULFURIC ACID

In an aspect, provided herein are methods for producing sulfuric acid and hydrogen gas, the methods comprising steps of: providing sulfur dioxide formed by thermal conversion of a sulfur-containing species; electrochemically oxidizing said sulfur dioxide to sulfuric acid in the presence of water; and electrochemically forming hydrogen gas via a reduction reaction. In some embodiments, the methods comprise a step of thermally converting said sulfur-containing species to said sulfur dioxide. Systems configured to perform these methods are also disclosed herein. Also provided herein are methods and systems for producing sulfuric acid and hydrogen gas by electrochemically forming the sulfuric acid and the hydrogen gas in a mixture comprising a sulfur material, a supporting acid, and water. Also provided herein are methods and systems for producing a cement material. 1. A method for producing a cement material comprising:(a) reacting a first acid and a first cement precursor to form a second cement precursor; and(b) converting the second cement precursor to a cement material.2. The method of claim 1 , wherein the first cement precursor comprises an element selected from the group consisting of Ca claim 1 , Si claim 1 , or Al claim 1 , or a combination of thereof.3. The method of claim 1 , wherein step (a) is performed in the presence of water as a wet slurry.4. The method of claim 1 , wherein the second cement precursor comprises an element selected from the group consisting of Ca claim 1 , Si claim 1 , or Al claim 1 , or a combination thereof.5. The method of claim 1 , wherein the second cement precursor comprises Ca.6. The method of claim 1 , wherein the first acid is at a concentration of greater than or equal to 20% by mass.7. The method of claim 1 , wherein converting the second cement precursor to a cement material comprises thermally converting the second cement precursor at an appropriate temperature for sintering or thermally decomposing the second cement ...

Porous silica-based material and portlandite for filling insulating brick with controlled structure and corresponding production method

FIELD: construction. SUBSTANCE: present invention relates to a method for preparing a porous material containing silica and calcium hydroxide. Method for preparing a porous material containing 25 wt% to 75 wt% of silica and from 75 wt% to 25 wt% of calcium hydroxide comprises the following successive steps: a step synthesising quicklime, a step of mixing the quicklime obtained in the previous step, water and silica according to a molar ratio of CaO/SiO 2 of between 0.8 to 1.2, and a weight ratio of water/(CaO+SiO 2 ) of between 2 to 60; a step of hydrothermal synthesis at a saturation water-vapour pressure of higher than or equal to 10 5 Pa (1 bar) and lower or equal to 3×10 5 Pa (3 bar) and at a temperature higher than or equal to 80 °C and lower than 150 °C, a step of drying the ceramic body obtained at a temperature of 100-450 °C. EFFECT: production of highly insulating building bricks. 15 cl, 2 tbl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 592 909 C2 (51) МПК C04B 2/10 (2006.01) C04B 28/18 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014103102/03, 25.06.2012 (24) Дата начала отсчета срока действия патента: 25.06.2012 (72) Автор(ы): ДЕЛЬ-ГАЛЛО Паскаль (FR), КАНТОННЕ Жером (FR) 30.06.2011 EP 11172043.9 (43) Дата публикации заявки: 10.08.2015 Бюл. № 22 R U (73) Патентообладатель(и): Л'ЭР ЛИКИД, СОСЬЕТЕ АНОНИМ ПУР Л'ЭТЮД Э Л'ЭКСПЛУАТАСЬОН ДЕ ПРОСЕДЕ ЖОРЖ КЛОД (FR) Приоритет(ы): (30) Конвенционный приоритет: (45) Опубликовано: 27.07.2016 Бюл. № 21 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 30.01.2014 (86) Заявка PCT: 2 5 9 2 9 0 9 (56) Список документов, цитированных в отчете о поиске: WO2010001000 A1, 07.01.2010. WO 2010000999 A1, 01.07.2010. EP 0264550 A2, 27.04.1988. RU 2303015 C1, 20.07.2007. 2 5 9 2 9 0 9 R U (87) Публикация заявки PCT: WO 2013/000859 (03.01.2013) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма ...

Method for burning fine-dispersed carbonate materials

FIELD: technological processes.SUBSTANCE: invention relates to production of powdered lime from carbonate material and can be used in agglomeration production, non-ferrous metallurgy, chemical, sugar industry, construction materials industry, pulp and paper production. Proposed method of thermal treatment of fine carbonate material, mainly limestone, involves tangential supply of fuel and air through several inputs distributed in height located in upper zones of furnace, supply of fine carbonate material to furnace upper part, roasting of carbonate raw material in descending two-phase flow, removal of finished product from lower part of furnace, and waste gases from upper part of furnace.EFFECT: high quality of the finished product and possibility of firing raw materials of wide fractional composition (0–3 mm).1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 723 793 C1 (51) МПК C04B 2/12 (2006.01) F27B 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C04B 2/12 (2020.02); F27B 1/00 (2020.02) (21)(22) Заявка: 2019133542, 21.10.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: (73) Патентообладатель(и): Закрытое акционерное общество "Липецкметаллургпроект" (RU) 17.06.2020 (56) Список документов, цитированных в отчете о поиске: RU 88350 U1, 10.11.2009. RU 2164329 C2, 20.03.2001. RU 2663425 C1, 06.08.2018. US 6138377 A1, 31.10.2000. US 4052149 A1, 04.10.1977. SU 649936 A1, 28.02.1979. SU 1364843 A2, 07.01.1988. UA 75219 C2, 15.03.2006. WO 2015018504 A1, 12.02.2015. (45) Опубликовано: 17.06.2020 Бюл. № 17 2 7 2 3 7 9 3 R U (54) СПОСОБ ОБЖИГА МЕЛКОДИСПЕРСНЫХ КАРБОНАТНЫХ МАТЕРИАЛОВ (57) Реферат: Изобретение относится к технологии Предлагаемый способ термообработки производства порошковой извести из мелкодисперсного карбонатного материала, карбонатного сырья и может быть использовано преимущественно известняка, включает в агломерационном производстве, цветной тангенциальную подачу ...

Process for burning and cooling carbonate rock in parallel-flow regenerative lime kiln and parallel-flow regenerative lime kiln

FIELD: chemistry. SUBSTANCE: group of inventions relates to a method for burning and cooling carbonate rock in a parallel-flow regenerative lime kiln with two shafts which are operated in alternation as burning shaft and as regenerative shaft, as well as to a parallel-flow regenerative kiln. Method takes place in a parallel-flow regenerative lime kiln with two shafts which are operated in alternation as burning shaft and as regenerative shaft. Carbonate rock is added in an upper region designed as preheat and burning zone of each shaft and is preheated and calcined in that region. Calcined carbonate rock is then cooled in a lower region designed as cooling zone and having a central deflector in each shaft. Cooled calcined carbonate rock is then discharged by way of discharge equipment allocated to each shaft. Cooling air is introduced into the cooling zone to cool the calcined carbonate rock, and one part of which is introduced in the region of the discharge equipment and the other part is introduced by way of the deflector. From 90 to 100% of the cooling air to be introduced into the burning shaft is introduced by way of the deflector. At most 10% is introduced in the region of the discharge device. From 90 to 100% of the cooling air to be introduced into the regeneration shaft is introduced in the region of the discharge equipment. At most 10% is introduced by way of the deflector. EFFECT: technical result is an increase in the uniformity of cooling in the cooling zones of the parallel-flow regenerative kiln using a small amount of cooling air. 11 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 652 594 C2 (51) МПК C04B 2/12 (2006.01) F27B 1/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C04B 2/12 (2018.02); C04B 28/10 (2018.02); F27B 1/005 (2018.02); F27B 1/04 (2018.02); F27B 1/10 (2018.02); F27B 7/38 (2018.02) (21)(22) Заявка: 2016104622, 28.07.2014 28.07.2014 (73) Патентообладатель(и): МЕРЦ ...

Straight-flow-counterflow furnace for calcination of carbonate materials

FIELD: furnaces. SUBSTANCE: invention relates to shaft furnaces for calcination of carbonate materials and can be used in metallurgical, construction, chemical, food and other industries. Furnace contains two wells with heating zones with heat regeneration, burning and cooling of the ready product. Shafts are connected by a transition channel arranged on the boundary of the roasting and cooling zones with a cross-section at the level of the arch of the transition channel in the form of a segment, the base of which is directed towards the transition channel, the peripheral part in the form of a semicircle and the inner part in the form of a rectangle. At that, shafts up to lower part of annealing zone are made with round section, and in lower part of annealing zone with smooth transition from round section to cross section at level of arch of transition channel, at that angle of inclination to horizon of walls in lower part of annealing zone is 75–90°, and at level of arch of transition channel section width of inner part is equal to radius of semicircular section of part periphery. EFFECT: technical result consists in reduction of capital costs and improvement of quality of calcined lime. 1 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 729 679 C1 (51) МПК F27B 1/02 (2006.01) C04B 2/12 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F27B 1/02 (2020.02); C04B 2/12 (2020.02) (21)(22) Заявка: 2019124261, 26.07.2019 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "ИЗВЕСТА" (RU) Дата регистрации: 11.08.2020 (45) Опубликовано: 11.08.2020 Бюл. № 23 2 7 2 9 6 7 9 R U (54) Прямоточно-противоточная печь для обжига карбонатных материалов (57) Реферат: Изобретение относится к шахтным печам для прямоугольника. При этом шахты вверху до обжига карбонатных материалов и может быть нижней части зоны обжига выполнены с круглым использовано в ...

Production of cement clinker and plant to this end

FIELD: process engineering. SUBSTANCE: set of inventions relates to production of clinker cement. Proposed method comprises steps whereat first and second stock portions 6, 7 are heated, calcium carbonate making the main component in first and second cyclone heaters 5 and 7, respectively. First and second heated stock parts 41, 61 are pre-annealed with gas application 9 for fuel combustion in reactor 1 with fluidised bed 13. Flow of fumes 8 produced by reactor 1 without backflow to reactor 1 is directed into second cyclone reactor 7. Annealed stock is roasted to obtain clinker in rotary furnace 2. Fumes 18 produced by rotary furnace 2 are directed into first cyclone heater 5. Clinker obtained in cooler 3 is cooled at forcing of cooling gas via clinker at the level of rotary furnace outlet. Fluidising gas represents gas 8 with content of oxygen of 90-100 % and low rate lower than 2 m/s. EFFECT: facilitated complexation. 15 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 536 578 C2 (51) МПК F27B 7/20 (2006.01) C04B 7/43 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012103452/02, 30.06.2010 (24) Дата начала отсчета срока действия патента: 30.06.2010 (72) Автор(ы): ДЕВРЁ,Себастьян (FR) (73) Патентообладатель(и): ФИВ ФСБ (FR) Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 10.08.2013 Бюл. № 22 R U 02.07.2009 FR 09/03.250 (45) Опубликовано: 27.12.2014 Бюл. № 36 A1, 21.05.2008. FR 2281792 A, 12.03.1973. SU 668589 A3, 15.06.1979; . SU 1085516 A3, 07.04.1984. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 02.02.2012 2 5 3 6 5 7 8 (56) Список документов, цитированных в отчете о поиске: US 4402667 A, 06.09.1983. EP 1923367 2 5 3 6 5 7 8 R U FR 2010/000478 (30.06.2010) C 2 C 2 (86) Заявка PCT: (87) Публикация заявки PCT: WO 2011/001044 (06.01.2011) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент" (54) СПОСОБ ПОЛУЧЕНИЯ ЦЕМЕНТНОГО КЛИНКЕРА В ...

一种二氧化碳镁基吸附剂及其制备方法

本发明属于环境污染防治与洁净煤燃烧技术领域，具体涉及一种二氧化碳镁基吸附剂及其制备方法，包括以下步骤：(1)将菱镁矿研磨成粉末，在一定温度下煅烧一定时间，得到以氧化镁为主要成分的粉末；(2)将步骤(1)得到的煅烧产物投入到高锰酸钾水溶液中，搅拌至混合均匀；(3)将步骤(2)得到的混合物在一定温度下干燥，得到二氧化碳镁基吸附剂。本发明制备的二氧化碳镁基吸附剂，能够保持良好的稳定性，多次循环利用，仍能保持良好的酸性气体吸附能力。在10次碳酸化‑煅烧循环实验中，本发明的制备方法制备的二氧化碳镁基吸附剂的CO 2 吸附效果，是未改性的菱镁矿吸附剂的约4倍。

Procedure and equipment for processing lime slurry

FIELD: oil and gas production. SUBSTANCE: procedure for supply of lime slurry into limestone baking oven including case of rotating oven having internal space between first and second end wall consists in supply of lime slurry by means of supplying device into flow of kiln gas. The supplying device is positioned to facilitate introduction of lime slurry into a lifting pipe in the point located inside the case of the rotating oven or in direct vicinity to the case for preliminary treatment of lime slurry. The procedure also consists in separation of preliminary treated lime slurry from flow of kiln gas. Further, the procedure consists in supply of separated lime slurry into the limestone baking oven and in calcination of separated lime slurry in it. EFFECT: raised wear resistance, elimination of lime slurry sticking to hot surfaces, reduced dimensions of oven at maintaining efficiency and improved repair ability. 17 cl, 3 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 430 899 (13) C2 (51) МПК C04B 2/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2008125084/03, 21.11.2006 (24) Дата начала отсчета срока действия патента: 21.11.2006 (73) Патентообладатель(и): АНДРИТЦ ОЙ (FI) R U Приоритет(ы): (30) Конвенционный приоритет: 21.11.2005 US 11/282,690 (72) Автор(ы): ЛЕЙЧЛИТЕР Джон Махлон III (US) (43) Дата публикации заявки: 27.12.2009 Бюл. № 36 2 4 3 0 8 9 9 (45) Опубликовано: 10.10.2011 Бюл. № 28 (56) Список документов, цитированных в отчете о поиске: US 5711802 A, 27.01.1998. RU 2114945 C1, 10.07.1998. SU 1678791 A1, 23.09.1991. SU 1323541 A1, 15.07.1987. SU 350762 A, 25.09.1972. US 4391671 A, 05.07.1983. 2 4 3 0 8 9 9 R U (86) Заявка PCT: FI 2006/000383 (21.11.2006) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 23.06.2008 (87) Публикация заявки РСТ: WO 2007/057512 (24.05.2007) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, стр.3, ООО " ...

一种石灰回转窑用预制件及其制备方法

本发明公开了一种以富镁镁铝尖晶石废砖为主原料的石灰回转窑用预制件及其制备方法，其技术方案是：按重量百分比，由1～3mm的富镁镁铝尖晶石废砖35～40%、0.088～1mm富镁镁铝尖晶石废砖18～25%、≤0.088mm富镁镁铝尖晶石废砖粉30～35%、≤0.03mm氮化硅细粉3～6%、≤0.246mm金属铝粉0.05～1%及复合结合剂4～6%构成；外加水占主料总重量的5～6%；所述复合结合剂由重量百分比20～40%的硅微粉和重量百分比60～80%的铝酸盐水泥组成，其中硅微粉重量百分比SiO 2 含量≥93%，铝酸盐水泥重量百分比Al 2 O 3 含量≥68.75%；其制备方法包括破碎、筛分、研磨、配料、成型、烘干和热处理等工序。本发明以上述废砖为主原料，价格低廉，引入氮化硅、金属铝粉及复合结合剂显著改善该预制件性能及质量。

用于处理石灰渣的方法和设备

一种用于将石灰渣供给到石灰窑中的方法，该石灰窑包括旋转窑壳，所述旋转窖壳具有位于第一端壁和第二端壁之间的内部，该方法包括：将石灰渣供给到位于旋转窑壳内部或者紧邻窑壳的烟道气流中以对石灰渣进行预处理；从烟道气流分离出经过预处理的石灰渣；将分离出的石灰渣输送到石灰窑中，并且在石灰窑中煅烧分离出的石灰渣。

一种富氧煅烧制备活性氧化钙的工艺方法

本发明公开了一种富氧煅烧制备活性氧化钙的工艺方法，其步骤包括：首先，将原料石灰石进行破碎筛分处理，使之粒度符合10～55mm，输送到截面为圆形的料仓内，料仓设置于竖式预热器上部；接着，料仓内的原料由下料管均匀输送到竖式预热器内，用高温窑气和竖式冷却器的冷却气体进行预热；然后，物料进入到回转窑中，从窑头通入富氧空气进行富氧煅烧；再接着，煅烧分解后得到的氧化钙进入竖式冷却器中用空气进行冷却即得活性氧化钙。本发明通过分级预热、富氧煅烧、分级冷却、温度动态监测等工艺的集成，并利用高温窑气和出冷却器高温气体联合预热原料，大幅度提高了系统的传热效率，显著提高氧化钙的活性，并降低了能耗，实现了节能减排。

脱除石灰窑细颗粒粉尘的风选装置及控制方法、石灰窑

本发明公开了一种脱除石灰窑细颗粒粉尘的风选装置及控制方法、石灰窑，风选装置包括：筒体，筒体的顶部设有出风口，筒体的上部设有进料口；旋转反射板式风选机构，旋转反射板式风选机构包括一设于筒体内的旋转反射蓖板，旋转反射蓖板上开设有多个布风孔，旋转反射蓖板的一端安装在筒体的侧壁上，旋转反射蓖板的另一端为自由端，筒体的外壁上安装一旋转电机，旋转电机的输出端通过一旋转联轴器与旋转反射蓖板连接；进风装置，安装在筒体的下部且位于旋转反射板式风选机构的下方，进风装置用于向筒体内鼓入气流。该风选装置及石灰窑有效地解决了现有的石灰窑出料时环境污染严重、粉矿资源浪费严重的问题。

Method of lump material burning in shaft furnace and device for inlet of gaseous fuel and air, made in form of central gas burner for mine burning furnace

Изобретение относится к способу обжига кускового материала в шахтной печи и устройству ввода газообразного топлива и воздуха в виде центральной газовой горелки, используемому при осуществлении способа. При осуществлении обжига кускового материала в шахтной печи в приосевой области зоны обжига формируют два концентрических фронта горения за счет охвата осевого потока воздуха из центральной газовой горелки кольцеобразным потоком газообразного топлива, который также охватывается кольцеобразным потоком воздуха, часть которого подают в приосевую область печи ниже выходов газообразного топлива из центральной газовой горелки, по меньшей мере, по одному отдельному каналу, минуя зону охлаждения материала в печи. Упомянутый отдельный канал выполнен обеспечивающим концентрический, равномерно охватывающий корпус газовой камеры поток воздуха с возможностью независимой регулировки его расхода. Технический результат заключается в повышении производительности печи, снижении удельного расхода топлива, повышении качества продукта обжига и увеличении срока службы футеровки и горелки. 2 н. и 7 з.п. ф-лы, 2 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 733 602 C1 (51) МПК C22B 1/214 (2006.01) F27B 1/16 (2006.01) F23D 14/20 (2006.01) F27D 7/06 (2006.01) C04B 2/12 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C22B 1/214 (2020.05); F27B 1/16 (2020.05); F23D 14/20 (2020.05); F27D 7/06 (2020.05); C04B 2/12 (2020.05) (21)(22) Заявка: 2019144519, 27.12.2019 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Калашников Георгий Линардович (RU) Дата регистрации: 05.10.2020 (45) Опубликовано: 05.10.2020 Бюл. № 28 2 7 3 3 6 0 2 R U (54) Способ обжига кускового материала в шахтной печи и устройство ввода газообразного топлива и воздуха, выполненное в виде центральной газовой горелки для шахтной обжиговой печи (57) Реферат: Изобретение относится к способу обжига выходов газообразного топлива из центральной кускового ...

Double-chamber lime kiln system and control method thereof

本申请公开了双膛石灰窑系统及其控制方法，根据上述系统和方法，利用所述测量装置测量所述烟气连接通道的某些参数，最终确定石灰石煅烧的程度，由此，本申请提供的系统和方法，可以确保所述双膛石灰窑本体在合适的时间对第一石灰窑本体和第二石灰窑本体的煅烧带的工作状态转换，最终得到优质的生石灰，同时节约能源。

Settable composition and uses therefor

A dry powdered flowable cement composition contains calcium carbonate and a partially decarbonated magnesium carbonate. A slurry of the composition will set hard with various organic fillers including waste products and toxic waste. The composition can be slurried with contaminated water such as sea water, mineral laden ground water and muddy water. A high percentage of filler can be added while still having an acceptable set.

Light-burned magnesium production device and production method

本发明的目的是针对于现有生产轻烧镁技术中存在的热能浪费、粉尘多的问题，提供了一种轻烧镁生产装置及生产方法，属于轻烧镁制备技术领域。本发明的轻烧镁生产装置由进料单元，预热器，回转窑，燃烧器，筛分锁风控料装置，冷却换热装置，成品仓，引风机和窑尾除尘器组成；本发明的方法通过预热、焙烧及冷却换热流程将菱镁矿石焙烧为轻烧镁。本装置生产能力大、热量利用率高、污染少。

Raw material mixture for making lime

Изобретение относитс  к технологии строительных материалов и может быть использовано при получе- - йии извести, примен емой в прйизвод- стве силикатных материалов. Цель изобретени  - уменьшение времени об- . жига извести при сохранении прочности автоклавированных изделий на ее основе Сырьева  смесь дл  получени  извести содержит, мас.%: природный . мел 97-98; отход травлени  плат в радиоэлектронике на.основе хлористых солей 2-3. Брем  обжига извести 1,4 ч, прочность известково-песча- ных изделий 24,6 МПа. 1 табл. The invention relates to the technology of building materials and can be used in the preparation of lime used in the manufacture of silicate materials. The purpose of the invention is to reduce the time around. lime flush while maintaining the strength of autoclaved products based on it. The raw material for lime production contains, in wt%: natural. chalk 97-98; PCB etching waste on the basis of chloride salts 2-3. The lime calcination time is 1.4 h, the strength of lime sand products is 24.6 MPa. 1 tab.

Industry calcining shaft kiln

本技术提供一种以气体或者液体或者粉体为燃料，煅烧温度更加均匀，产品质量更好，节能环保，自动化程度高的能够对块状或者颗粒状或者球形状物料进行煅烧的工业煅烧立窑。它包括筒体，在筒体上部设置用于向筒体内填加物料的加料装置和用于将尾气排出的排气装置，在筒体下部设置用于向筒体内送入助燃风的助燃风装置和用于将筒体内物料排出的卸料装置，在加料装置与助燃风装置之间的筒体至少有一个突变截面，该突变截面上部的筒体内腔在水平方向尺寸较小，该突变截面下部的筒体内腔在水平方向尺寸较大，物料在筒体内向下流动时，在突变截面下部处形成物料不能自然到达的空腔；燃料燃烧装置中的烧嘴的出口与该空腔相通，燃料从烧嘴喷出。

Cement clinker manufacturing method in equipment, and such cement clinker manufacturing equipment

Method for producing calcia clinker with excellent digestion resistance

Method for producing binder based on dolomite for manufacture of wall and finishing products of civil construction

FIELD: building materials. SUBSTANCE: invention relates to building materials, namely, to obtaining a binder from dolomite, and can be used in the manufacture of wall and finishing products for civil engineering. The method includes grinding dolomite to a fraction of 1 mm, roasting at a temperature of 600-700 °C for 20-25 minutes, cooling and activation. In this case, after cooling, the binder, which is caustic dolomite (MgO×CaCO 3 ), is activated by grinding in an apparatus with an external electromagnetic field, into which it is fed by means of the translational movement of the piston along the inner cavity of a non-magnetic continuous pipe into the zone of rotating anisotropic ferromagnetic bodies with a diameter of 0.8-1.5 mm and 5-10 mm long, the movement of which is provided by the external electromagnetic field of the apparatus. In this case, the energy saturation and the length of the working zone is at least 100 kW/m 3 and 0.6 m, the activation time is 3-7 minutes. EFFECT: technical result is to increase the strength in compression and bending, the uniformity of changes in the volume of the material. 1 cl, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 744 365 C1 (51) МПК C04B 40/00 (2006.01) C04B 9/20 (2006.01) C04B 2/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C04B 40/0014 (2021.01); C04B 9/20 (2021.01); C04B 2/10 (2021.01) (21)(22) Заявка: 2020106858, 13.02.2020 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Общество с ограниченной ответственностью "Доломит" (RU) Дата регистрации: 05.03.2021 (56) Список документов, цитированных в отчете о поиске: RU 2506235 С1, 10.02.2014. RU 2688708 С1, 22.05.2019. RU 2667756 С1, 24.09.2018. RU 2063937 С1, 20.07.1996. WO 9839564 А1, 11.09.1998. В.А. ЛЕБЕДЕВ и др. Сущность и закономерности динамики процесса обработки ферромагнитными гранулированными средами во вращающемся электромагнитном поле. Прогрессивные технологии и ...

Method for manufacturing hydrated magnesium carbonate

The present invention relates to a method for producing high purity hydrate magnesium carbonate, and more particularly, to a method for producing high purity hydrated magnesium carbonate (HMC) and magnesium oxide (MgO) from a solution in which calcium ions and magnesium ions are present coexisting ≪ / RTI > According to the present invention, high purity hydrate magnesium carbonate can be produced in a solution in which calcium ions and magnesium ions are present in a coexistence state, thereby making it possible to create high added value of resources. Compared with the prior art, a high purity hydrate magnesium carbonate And magnesium oxide (MgO) of high purity can be manufactured. Therefore, the economical efficiency due to the reduction of the process can be improved.

Mixture for production of water resistant lime clinker

FIELD: production of refractory materials. SUBSTANCE: mixture for production of water resistant lime clinker comprises, mas.%: lime stone is roasted at 900-1800 C, 4.00-60.0; lime stone is calcined at 100-900 C, 30.0-95.0; additive, the balance. Said additive comprises, mas.%: cerium oxide, 30-70 and at least one compound chosen of neodymium oxide, praseodymium oxide, promethium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, 0.1-5.0; lutecium oxide, the balance. Mixture provides production of clinker having density 3.27-3.33 g/cm 3 . Porosity of clinker is 2.1-2.5 %. Clinker has high refining capacity in respect with ferrous, non-ferrous and precious metals. EFFECT: improved quality of product. 1 tbl 1 з6бэ9ГЬс ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2116 987. 13) Сл С 04 В 35/03 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 96114376/03, 09.07.1996 (46) Дата публикации: 10.08.1998 (56) Ссылки: 4$ 4366257 А, 28.12.82. ЗИ 1294792 А, 07.03.87. КО 2023705 СЛ, 30.11.94. $4 81938 А, 23.07.58. 5Ц 81102 А, 13.07.61. $Ч 147508, А, 1962. ЕК 2129154 А, 01.12.72. СВ 1054415 А, 11.01.67. ОЕ 1216733 А, 12.05.66. (71) Заявитель: Санкт-Петербургский государственный технологический институт (технический университет) (72) Изобретатель: Суворов С.А., Смиловицкий А.М., Долгушев Н.В. (73) Патентообладатель: Санкт-Петербургский государственный технологический институт (технический университет) (54) ШИХТА ДЛЯ ПОЛУЧЕНИЯ ВОДОУСТОЙЧИВОГО ИЗВЕСТКОВОГО КЛИНКЕРА (57) Реферат: Шихта для получения водоустойчивого известкового клинкера относится К производству огнеупоров и может быть использована при получении устойчивого к гидратации известкового клинкера. Шихта для получения водоустойчивого известкового клинкера содержит (в мас.%): обожженный при 900-1800°С известняк 4,00 - 60,0; прокаленный при 100-900°С известняк 30,0-95,0; ...

Crack retardant mixture using lime type Expansive admixture

The present invention relates to a crack prevention and shrinkage reduction composition using a lime-based expansion agent. According to an embodiment of the present invention, the crack prevention and shrinkage reduction composition using a lime-based expansion agent comprises: the lime-based expansion agent including 10-60 parts by weight of anhydrite or gypsum dehydrate for 100 parts by weight of limestone. 100 parts by weight of the lime-based expansion agent includes: 1-5 parts by weight of silicon oxide, and 1-5 parts by weight of silicon carbide. The present invention improves a crack control effect and a shrinkage control effect.

Method of calcining pelletized calcium hydroxide

Pellet-shaped calcium hydroxide forming part of the mixture of flux and ores in electrothermal calcium carbide furnaces is calcined. The pellets are made by granulating or briquetting moist calcium hydroxide, delivered to a sintering grate and conveyed thereon through a heating zone, wherein high temperatures are produced by the combustion of gas, above the grate, and wherein the combustion gas is exhausted, below the grate. The calcium hydroxide pellets are more especially placed on to the grate, covered with a layer of broken limestone and the undried pellets are directly conveyed through the heating zone, in an apparatus for carrying out the process.

Calcination of slurries

A granulated slurry, e.g. of CaCO3, is calcined in at least two temperature stages (30, 31, 32) in a fluidized bed installation (9) with directed movement through the stages. The temperatures in the respective steps (30, 31, 32) can be individually controlled to ensure that the temperature in the hottest stage (32) corresponds to a predetermined degree of decomposition of calcium carbonate. Typically the hottest stage is at a temperature of at least 880 DEG C, whilst the temperature of the other stage or stages is lower. <IMAGE>

Curable Compositions and Uses thereof

무수 분말화 유동성 시멘트 조성물은 탄산칼슘 및 부분적으로 탈탄산염화된 탄산마그네슘을 함유한다. 조성물의 슬러리는 폐기 생성물 및 독성 폐기물을 포함하는 각종 유기 충전재로 경화된다. 당해 조성물은 예를 들어 해수(海水), 광물 함유 지하수 및 진흙탕 물과 같은 오염된 물로 슬러리화될 수 있다. 여전히 허용가능한 경도를 유지하면서 높은 비율의 충전재가 부가될 수 있다.

Method for preparing active magnesium oxide by staged combustion of gas magnesite

一种利用燃气菱镁矿分级燃烧制备活性氧化镁方法，涉及一种矿产煅烧方法，为一种利用燃气的菱镁矿输送/悬浮轻烧制备活性氧化镁分级燃烧方法，具体包括：将菱镁矿粉轻烧所要求的燃气燃烧分成多级，其中，第一级燃烧在菱镁矿煅烧炉之前的燃气燃烧器中进行，所需要的燃烧空气全部从第一级燃烧器供入，该过量空气与燃气燃烧产生的高温烟气进入菱镁矿粉煅烧炉的底部，第二级以后的燃气燃烧通过从煅烧炉底部以上合适位置直接将燃气供入煅烧炉中进行。本发明利用燃气的分级燃烧保证了煅烧炉中温度的恒定性，减少了烟气的产生量，从而保证了轻烧氧化镁的品质均匀和高活性，避免了过烧和欠烧问题。

A kind of light-burned MgO calcining production technology and device

本发明公开一种轻烧MgO煅烧生产工艺和装置。本发明所述生产装置包括原料仓、旋风悬浮预热器、回转窑、烧嘴热风炉、流化冷却床和成品仓；原料仓中碳酸镁粉料由输送设备送入旋风悬浮预热器，与窑尾高温废气在旋风筒内进行均匀热交换；换热后的尾气经废气处理装置处理后排入大气，预热好的碳酸镁粉料由窑尾进入回转窑，在回转窑内煅烧分解成MgO熟料粉，煅烧后的高温MgO熟料粉经流化冷却床冷却后送至成品仓存储。本发明改变现有回转窑煅烧制备轻烧MgO时所存在的缺少预热措施、余热回收利用率低，烧成热耗高等缺点，开发了一种改进型轻烧MgO煅烧生产工艺和装置，该装置具有投资少、余热利用率高、烧成热耗低、产品生产成本低等优点。

Self-feedback calcination control method and device for lime fired by rotary kiln

回转窑烧制石灰的自反馈煅烧控制方法和装置。解决原料石灰石等来源多,大小不均,出现生和过烧的较大差异,造成产品质量的极不稳定。在料出口处设一采样检测装置:出料石灰块由伸缩、取样及皮带传动装置送至检测颗粒大小的三层筛网和配合的生烧率检测装置,或者用有两功能的<机器视觉掇象器>,然后将检测结果传送反馈到控制中心。当检测颗粒大小不变,控制中心自动调节二次风电机、煤粉电机,实现自动升或降温，改善生或过烧程度。当颗粒大小变化，还需同时再调节一次风电机和燃烧器行程电机，实现调温度同时调火焰形态,以适应不同颗粒大小下的石灰煅烧。保证了产品质量的稳定。避免了能源的浪费。且可预防窑体内结圈的产生。适用于长度在55‑65米的烧制石灰的回转窑采用。

METHOD FOR CLEANING THE FLOW OF GAS COMBUSTION PRODUCTS FROM THE PLANT FOR PRODUCING A CLINKER AND THE RELATED DEVICE

1. Способ очистки потока газообразных продуктов сгорания из установки для получения клинкера, включающий следующие стадии:a) удаление пыли из потока газообразных продуктов сгорания, выходящего из суспензионного подогревателя при температуре от 250 до 400°С, с образованием обеспыленного потока газообразных продуктов сгорания;b) осуществление обработки указанного обеспыленного потока газообразных продуктов сгорания посредством селективного каталитического восстановления NOвосстанавливающим агентом с образованием очищенного потока газообразных продуктов сгорания.2. Способ по п.1, в котором стадию (а) проводят при температуре от 270 до 360°С.3. Способ по п.1, в котором удаление пыли на стадии (а) обеспечивает снижение концентрации пыли в обеспыленном потоке газообразных продуктов сгорания до значения ниже 15 г/м(н.у.), предпочтительно ниже 10 г/м(н.у.), а еще более предпочтительно ниже 5 г/м(н.у.),4. Способ по п.1, дополнительно включающий следующую стадию:c) обработку очищенного потока газообразных продуктов сгорания с целью дополнительного удаления загрязняющих веществ и/или извлечения тепла.5. Способ по п.4, в котором стадия (с) включает обработку для снижения содержания оксидов серы, присутствующих в очищенном потоке газообразных продуктов сгорания, в частности SO, предпочтительно посредством введения в указанный очищенный поток газообразных продуктов сгорания соединений на основе оксида и/или гидроксида кальция.6. Способ по п.4, в котором стадия (с) включает извлечение тепла из очищенного потока газообразных продуктов сгорания посредством по меньшей мере одного теплообменника и/или по меньшей мере одной градирни.7. Способ РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C04B 7/36 (13) 2011 127 330 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2011127330/03, 17.12.2009 (71) Заявитель(и): Итальчементи С.п.А. (IT) Приоритет(ы): (30) Конвенционный приоритет: 23.12.2008 IT MI2008A002310 (85) Дата начала ...

METHOD AND EQUIPMENT FOR TREATMENT OF Lime Sludge

1. Способ подачи известкового шлама в печь для обжига известняка, включающий в себя корпус вращающейся печи, имеющий внутреннее пространство между первой и второй торцевой стенкой, способ включает в себя: ! подачу известкового шлама в поток топочного газа во внутреннее пространство корпуса вращающейся печи или в непосредственной близости к корпусу для предварительной обработки известкового шлама; ! отделение предварительно обработанного известкового шлама от потока топочного газа; ! подачу отделенного известкового шлама в печь для обжига известняка, и ! кальцинирование отделенного известкового шлама в печи для обжига известняка. ! 2. Способ по п.1, в котором поток известкового шлама регулируют так, чтобы, по меньшей мере, часть известкового шлама попала непосредственно во внутреннее пространство печи и не проходила предварительную обработку топочными газами. ! 3. Способ по п.1, в котором известковый шлам, не вовлеченный в поток топочного газа, попадает непосредственно во внутреннее пространство печи. ! 4. Способ по п.1, в котором известковый шлам, подлежащий предварительной обработке, представляет собой влажный известковый шлам из фильтра для известкового шлама. ! 5. Способ по п.1, в котором предварительная обработка включает в себя: ! первый этап, на котором влажный известковый шлам сгущают на фильтре для известкового шлама и высушивают посредством топочного газа из печи, и отделяют от топочного газа, и ! второй этап, на котором высушенный известковый шлам с первого этапа предварительно нагревают топочным газом из печи, отделяют от топочного газа, в соответствии с чем, на втором этапе высушенный известковый шлам вво РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2008 125 084 (13) A (51) МПК C04B 2/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2008125084/03, 21.11.2006 (71) Заявитель(и): АНДРИТЦ ОЙ (FI) (30) Конвенционный приоритет: 21.11.2005 US 11/282,690 (43) Дата публикации заявки: ...

Method of producing powdered calcium oxide

본 발명은 통상 로내 온도 825℃∼1,250℃ 분위기로 유지되어 있는 소성로내에 입도 2mm 이하의 석회석분말 또는 석회석슬라지를 로내에 다수열로 배치되고 회전가능한 교반중심축을 가진 교반기를 설치하고 그 평판위에 상기 분말원료를 쌓아놓고, 상기 교반기에 부착한 다수의 교반기 날개에 의해 대략 6∼36 r.p.m의 회전속도로 상기 분말원료를 교반하면서 소성배출되도록 한 것을 특징으로 하는 분생석회제조방법에 대한 것이다. In the present invention, a limestone powder having a particle size of 2 mm or less or limestone slab having a particle size of 2 mm or less is usually arranged in a furnace in a firing furnace maintained at an atmosphere in a furnace at a temperature of 825 ° C to 1,250 ° C. The raw material is stacked, and the pulverized lime manufacturing method characterized in that the pulverized discharge while stirring the powder raw material at a rotational speed of approximately 6 to 36 rpm by a plurality of stirrer blades attached to the stirrer.

Method of magnesia binder producing

FIELD: building materials. SUBSTANCE: MAGNESIA binder is produced from dolomite exhibiting high activity and stability of binding property. Parameters of dolomite calcination (temperature and holding time) were taken by coefficient ratio CO 2 /MgO which is determined by calibration plot that is built by measured method. EFFECT: enhanced property of binder. 2 dwg $506790с ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ” 2 064 905 ' (51) МПК 13) Сл С 04 В 9/20 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 5064555/33, 28.07.1992 (46) Дата публикации: 10.08.1996 (56) Ссылки: А.Я. Вайвад и др. Доломитовые вяжущие вещества, Рига, Изд-во А.Н. Латвийской ССР, 1958, с. 260. (71) Заявитель: Корнеев Валентин Исаакович, Сизоненко Александр Петрович, Шломин Геннадий Павлович (72) Изобретатель: Корнеев Валентин Исаакович, Сизоненко Александр Петрович, Шломин Геннадий Павлович И о (73) Патентообладатель: Корнеев Валентин Исаакович, Сизоненко Александр Петрович, Шломин Геннадий Павлович > © (54) СПОСОБ ПОЛУЧЕНИЯ МАГНЕЗИАЛЬНОГО ВЯЖУЩЕГО © (57) Реферат: 602, % + Способ получения магнезиального вяжущего. Предложен способ получения о магнезиального вяжущего из доломита с высокой активностью и стабильностью <> вяжущих свойств. Параметры обжига с! доломита (температуру и время выдержки выбирают по — коэффициенту, равному отношению СО>5/ МаО и определяемому по калибровочному графику, который строят — расчетным способом. 2 ил. (у 25 т т т | И 0 ре 20 25 30 м0.” Фиг. $506790с ПЧ Го КУЗЗАМ АСЕМСУ ГОК РАТЕМТ$ АМО ТКАОЕМАКК$ (19) 12) АВЗТКАСТ ОЕ 1МУЕМТОМ ВИ” 2 064 905 ' (51) 1пЕ. С1.6 13) Сл С 04 В 9/20 (21), (22) АррИсаНоп: 5064555/33, 28.01.1992 (46) Бае ог рчбИсаНоп: 10.08.1996 (71) АррИсапе: Когпееу УМаепйпт |5ааКомсп, Зхопепко А еКзапаг Регомси, ЭШотт Сеппаан Рамомсп (72) пуетщог. — Когпееу Уаепип |5ааКомсп, Зхопепко АеКзапаг Регомсй, ЭШотт Сеппааи Рамомсп (73) Ргорпеюг: Когпееу Маепйп |5ааКомсп, Зхопепко А еКзапаг Регомси, ЭШотт Сеппаан ...

A kind of limekiln that the hot sending of gasification furnace coal gas of high temperature is directly burnt

本发明涉及一种气化炉高温煤气热送直接燃烧的石灰窑，包括气化炉、石灰窑和高温煤气旁通管路，气化炉设有煤气出口管，石灰窑设有燃烧器。石灰窑为套筒窑、梁式石灰窑、双膛窑和回转窑，燃烧器为烧嘴和/或插入式烧嘴。气化炉的煤气出口管通过高温煤气管路与燃烧器的燃料入口管路连接，高温煤气管路设有高温煤气旁通管路，高温煤气旁通管路用于在窑炉急停状态下，将气化炉产生的高温煤气通过高温煤气旁通管路进行疏导，防止憋压。本发明优化气体燃料的进料形式，充分利用高温煤气携带的显热，提高石灰窑的热效率和煅烧效率，有利于节能减排、降低石灰生产的能耗及成本。

Equipment of mixing for limestone in a rotating burnt furnace

본 발명은 석회석을 가열하여 생석회를 제조하는 회전식 소성로에 관한 것으로써, 상세하게는 로내 충진된 원석 하층부의 균일한 소성으로 고품위 생석회를 제조하는 장치에 관한 것이다. The present invention relates to a rotary kiln for producing quicklime by heating limestone, and more particularly, to an apparatus for producing high quality quicklime by uniform firing of a lower layer of filled raw stones in the furnace. 더욱 상세히 설명하면, 회전식 소성로(100)의 석회석 상하층 혼합장치(160)에 있어서, 소성로(110)의 입구측단부(154)와 출구측단부(150)에 상기 장치(160)를 고정하는 고정부(100)와, 상기 고정부(100)에 의해 고정되어 소성로(110) 내부에서 몸체(159)의 리프터(158)로 석회석을 혼합하는 혼합부(200)와, 상기 로(110) 내에 형성되는 원석충진 각도를 상기 몸체(59)와 연결된 각도조정 레일(157)에 의해 각도 조정이 가능한 각도조정부(300)로 이루어진 것을 특징으로 하는 회전식 소성로의 석회석 혼합장치에 관한 것이다. In more detail, in the limestone upper and lower layer mixing apparatus 160 of the rotary kiln 100, the apparatus 160 is fixed to the inlet end 154 and the outlet side end 150 of the kiln 110. The mixing unit 200 and the mixing unit 200, which is fixed by the fixing unit 100 to mix the limestone with the lifter 158 of the body 159 in the firing furnace 110, and formed in the furnace 110 It relates to a limestone mixing device of a rotary firing furnace, characterized in that the angle of the stone filling angle 300 is adjustable by the angle adjusting rail 157 connected to the body (59).

Lime slaking method by annular shaft kiln

본 발명은 애뉼라 샤프트킬른형 석회 소성로에서의 생석회의 증산방법에 관한 것이며, 구체적으로는 과중한 추가 설비나 기존 설비의 변경없이 애뉼라 샤프트형 석회 소성로에서 석회석을 추가로 소성시켜 생석회의 생산량을 증대시킬 수 있는 생석회의 제조방법에 관한 것이다. The present invention relates to a method for increasing the quicklime of lime in an annular shaft kiln type lime kiln, specifically, to further increase the yield of quicklime by further calcining limestone in an annular shaft type lime kiln without heavy additions or changes to existing equipment. It relates to a method for producing quicklime that can be made. 유체연료를 연소시키기 위해 공급되는 공기의 과잉분에 의해 연소될 수 있는 양의 고체연료를 소성로의 상부로 공급하여 과잉분의 공기에 의해 예열대 하부에서 연소시키고, 이 때 발생되는 열량에 의해 추가로 석회석을 소성시킬 수 있다. The amount of solid fuel that can be combusted by the excess of the air supplied to combust the fluid fuel is fed to the top of the kiln to be burned in the lower part of the preheating zone by the excess air and added by the amount of heat generated at this time. Limestone can be calcined. 본 발명의 방법에 의하면, 기존의 설비를 크게 변경하지 않고 약간의 추가설비만으로 생석회의 생산량을 크게 증대시킬 수 있으며 조업가능한 운전영역을 더 넓게 할 수도 있다. According to the method of the present invention, it is possible to greatly increase the yield of quicklime with only a few additional facilities without significantly changing the existing equipment, and to expand the operable operating range.

A kind of lime kiln device using circulating air

本发明涉及一种采用循环热风的石灰窑装置及工业石灰生产方法，在制取石灰时使用循环热风煅烧石灰石，煅烧后的废循环热风用于对石灰石矿料进行预热，预热后的废循环热风被降温，经除尘后被输送到蓄热式加热炉组，加热到设定的煅烧温度后再送回到石灰窑系统用于煅烧。本发明通过使用循环热风煅烧石灰石，可以显著提高石灰品质、提高石灰成品率、提高生产率、有利于回收高纯度CO 2 ，本发明提出的石灰窑系统循环风采用蓄热式加热炉组加热，石灰窑没有配置燃烧器系统，蓄热式加热炉可以利用低热值的高炉煤气做燃料，因而有利于简化窑体结构、降低石灰窑运行成本。

Preparation method and device for the calcined compound that produces calcination product

一种用于由原料生产高度煅烧且煅烧均匀的产品的方法。该方法包括以下步骤：将所述原料研磨成粉末；对所述粉末进行预热；在反应器设备中煅烧所述粉末，所述反应器设备包括多个反应器区段，其中，在每个顺序的反应器区段中使用快速煅烧器以通过在每个区段中升高温度来使所述粉末逐渐反应。最后区段是高温反应器，所述高温反应器具有受控的停留时间和温度，所述受控的停留时间和温度能够使煅烧过程受控完成，以获得所需的煅烧和烧结程度的产品；以及对所述产品进行冷却。

METHOD AND DEVICE FOR CALCINATING A SLAVE CONTAINING CALCIUM CARBONATE

Installation And Process For Calcining A Mineral Load Containing A Carbonate In Order To Produce A Hydraulic Binder

An installation comprising a combustion chamber having a device for introducing the mineral load and that is connected to a preheater, a combustion device to maintain the chamber at a temperature between 700° C. and 900° C., a treatment gas introducing device, the gas having a controlled carbon dioxide content in order to oppose the dissociation of the carbonate in the chamber and a device for removing the calcined mineral load guided into a cooler. The chamber also forms a fluidized bed. The treatment gas introducing device is supplied, at least partially, by a bypass duct, with some of the flue gases from the chamber coming from a device for discharging these gases into the atmosphere. This may be used in the production of a cement-type hydraulic binder.

Method and device for at least partial calcining of a preheated, powdery raw material

FLOATING GAS REACTOR

Direct-flow/counter-flow regeneration furnace for limestone burning, and furnace operation method

FIELD: heating. SUBSTANCE: invention refers to operation method for direct-flow/counter/flow regeneration furnace for limestone calcination, including at least two wells, each well featuring pre-heating zone, calcination zone and cooling zone, and bypass channel connecting both wells. Method involves use of both wells in turns as calcination well and exhaust well, combustion air and fuel supply to calcination well to form flame of required length, and transfer of hot gas produced in calcination furnace to exhaust well via bypass channel; at least one hot gas parameter characteristic for a given flame length is determined by direct or indirect measurement in the bypass channel area, preferred parameter being the difference of mean hot gas temperature in the bypass channel and mean minimum hot gas temperature in the bypass channel, or NO x content and/or CO content in exhaust gas in the bypass channel, and fuel to combustion air ratio is controlled depending on the parameter to form flame of required length. In addition, invention refers to direct-flow/counter-flow regeneration furnace for limestone calcination. EFFECT: improved quality of burnt limestone. 13 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК F27B 1/02 (11) (13) 2 538 844 C2 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012129962/02, 15.09.2010 (24) Дата начала отсчета срока действия патента: 15.09.2010 (72) Автор(ы): ПИРИНГЕР,Ханнес (CH) (73) Патентообладатель(и): МЕРЦ ОФЕНБАУ АГ (CH) Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 27.01.2014 Бюл. № 3 R U 15.12.2009 DE 102009058304.1 (45) Опубликовано: 10.01.2015 Бюл. № 1 A, 11.11.1981. US 4315735 A, 16.02.1982. US 6453831 B1, 24.09.2002. RU 2085816 C1, 27.07.1997. SU 1796850 А1, 23.02.1993 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 16.07.2012 2 5 3 8 8 4 4 (56) Список документов, цитированных в отчете о поиске: DE 2927834 A1, 27.03.1980. ...