Method for recycling iron on line from iron-containing industrial slag and preparing glass ceramics frit

The invention relates to a method for recycling iron on line from iron-containing industrial slag and preparing a glass ceramics frit, belonging to the technical field of resource comprehensive utilization and material preparation and mainly comprising a two-step method process of iron-containing industrial slag online rough adjustment and modification for reducing iron and fine adjustment and modification for preparing the frit. The method comprises the steps of: discharging high-temperature iron-containing slag into a high-temperature furnace device, and simultaneously adding a reducing agent and a modifying agent to ensure that slag components are adjusted to reach the optimal component point in which iron oxide is reduced; after fully reacted, separating reduced molten iron from the slag, and recycling to obtain high-temperature molten iron; further adding a modifying agent and an adjusting agent into the slag remained after the separation to ensure that the slag components are adjusted ...

Environment protection type energy-saving coombustion technique

An environment protection type energy-saving combustion technique for industrial furnce or kiln features that the heat accumulating body is used to preheat air to high temp and reduce the generation of NOx, realizing the low-oxygen combustion in high-temp condition. Its advantages include saving energy by 30-60%, decreasing the CO2 and SO2 exhaustion by 30-60%, and low level of exhausted NOx (0.03-0.003%).

GASIFICATION METHOD OF FLUIDIZING POWER COAL

A PFMSSB composite flocculent

Abstract of Description A PFMSSB composite flocculent applied for treating the coking wastewater in environmental protection engineering field is provided, which is characterized by the molar ratio of Fe/Si=0.8~2.5, Mg/Fe=0.3~1.5 and B/Si=0.2~0.4; the preparation method of the flocculent is as follows: a certain amount of sodium silicate is weighed and taken, a solution with the 2%~3% quality percentage of SiO 2 is gotten through adding into distilled water, the activation pH value is adjusted between 2-3 by use of sulfuric acid and sodium hydroxide and polymerization is completed in room temperature for 10-30min; the ferric sulfate, magnesium sulfate and sodium tetraborate are added according to molar ratio and stirred in a mixer and the flocculent is finally prepared after curing for 24 hours. During flocculent pre-treating, the dosage of PFMSSB is the minimum of 1-3ml/L and the pH value may not be adjusted. After treatment, the removal rate of turbidity and COD in effluent are 96.2% ...

Metal liquid pulse inoculated treating method

Double-hearth high temperature smelting furnace

The invention discloses a double-hearth high temperature smelting furnace, and belongs to the technical field of electric heating. The double-hearth high temperature smelting furnace is characterized in that: a furnace body has a high temperature heating hearth and an ultrahigh temperature heating hearth at the same time, wherein the high temperature heating hearth has a box-type furnace structure with a lifting bottom, and the ultrahigh temperature heating hearth has a well-type furnace structure with a lifting bottom; and exchange of bottoms of the two heating hearths and heating materials can be realized through furnace bottom lifting and rotating mechanisms. The two heating hearths can be used separately or used at the same time. When the two hearths are used together, the material can be preheated in the high temperature hearth or further cooled, and the preheated material is further smelted in the ultrahigh temperature hearth or cooled. Through a double-hearth structure, the double-hearth ...

Thermal-state slag online modification device

The invention relates to the fields of sensible-heat utilization of metallurgical high-temperature slag and efficient comprehensive utilization of resources, and provides a thermal-state slag online modification device. Through the device, high-quality modified slag can be prepared by use of the sensible heat of slag. The device comprises a top plug, a modification furnace body, a primary wind gap, a secondary wind gap, a third wind gap, a cyclone hearth, a stirring paddle, a partition wall, a slope pool bottom, a slag discharge hole, an iron liquid discharge hole, a scrap iron separation wall, a flue, a handle, a pressure relief hole, a combustion observation hole, an ignition burner, a modification chamber observation hole, a concurrent heating burner, a slag discharge chamber observation hole, a liquid flow hole, a charging hole, a sampling hole, a modification chamber, a scrap iron separation chamber, a slag discharge chamber and a cyclone furnace body. The high-quality modified slag ...

Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field

The invention belongs to the fields of material science and engineering research, and mainly relates to a method for improving the magnetic characteristics of orientated silicon steel by a pulse electric field. The method for improving the magnetic characteristics of orientated silicon steel by heat treatment of a pulse electric field comprises the following steps of: adopting an electric pulse modification (EPM)-C type electric pulse generator for the annealing test, wherein a lead wire is directly connected with two ends on one side of a sample and is protected by a high purity corundum protecting tube; annealing in a box resistance furnace, adopting gas atmosphere protection, heating an oriented silicon steel sheet from the room temperature to the required annealing temperature, insulating for a period of time, treating the oriented silicon steel sheet in the pulse electric field during the insulation period, and then taking out the oriented silicon steel sheet and cooling in the air ...

Double-hearth high temperature smelting furnace

The invention discloses a double-hearth high temperature smelting furnace, and belongs to the technical field of electric heating. The double-hearth high temperature smelting furnace is characterized in that: a furnace body has a high temperature heating hearth and an ultrahigh temperature heating hearth at the same time, wherein the high temperature heating hearth has a box-type furnace structure with a lifting bottom, and the ultrahigh temperature heating hearth has a well-type furnace structure with a lifting bottom; and exchange of bottoms of the two heating hearths and heating materials can be realized through furnace bottom lifting and rotating mechanisms. The two heating hearths can be used separately or used at the same time. When the two hearths are used together, the material can be preheated in the high temperature hearth or further cooled, and the preheated material is further smelted in the ultrahigh temperature hearth or cooled. Through a double-hearth structure, the double-hearth ...

NOZZLE AND PROCESS FOR GASIFYING OF PULVERIZED COAL

This invention provides an atomizer burner for gasifying pulverized coal and relevant technology. The atomizer burnerconsists of a cyclonic nozzle for primary air, jet orifice for tangent entering of secondary air, cyclonic pre-burning chamber, cyclonic duster, chamber for full combustion of ashed carbon, jet orifice for entiring of tertiary air for full combustion, cyclonic regulator for guarternary air, locking hopper for removing ash residues, and ascending tube. Puverized coal is preburned and gasified in cyclonic preburning chamber and then passes through cyclonic duster to remove dust, clean hot coal gas is thus obtained. The carbon remained in ashes is reburned in chamber for full combustion, the ashes are removed as solid residues.

High-strength carbonized steel slag cementing material and preparation method thereof

The invention relates to a high-strength carbonized steel slag cementing material and a preparation method, belongs to the technical field of building materials, and can improve the performance of carbonized steel slag blocks and the storage amount of CO2. The method comprises the following steps: S1, uniformly mixing a lifting agent with water to obtain a lifting agent solution; the improver is ammonium citrate or a mixture of ammonium citrate and at least one of H2SO4, citric acid and sodium citrate; s2, the lifting agent solution and steel slag powder are fully mixed, and a wet mixture is obtained; s3, pressing the wet mixture to obtain a blank body; s4, the blank is placed in a CO2-rich environment for carbonization treatment, and a carbonized steel slag cementing material is obtained; the compressive strength of the high-strength carbonized steel slag cementing material is 99-108 MPa, the CO2 absorption amount of each hectogram of steel slag powder is 16.2-17 g, and the porosity is ...

Magnetic air separating method and device

Said invention refers to the method and device for preparing low purity oxygen or oxygen-enriched air by magnetic force separating air. Said device consists of permanent magnet, oxygen channel and electric heater. When air is near the non-uniform magnetic field, the oxygen in air is magnetized, the volume susceptibility is raised, and the oxygen is attracted into oxygen channel. The volume susceptibility of attracted oxygen becomes lower. The attraction force to rear cold oxygen is larger than that of hot oxygen, a propelling force is formed to make oxygen move. Thermal magnetic convection is formed, so the oxygen is separated from air.

Gas supply and control device for spraying oxygen in blast furnace

The oxygen supply and control apparatus for oxygen-coal blowing of blast furnace features that pressure-regulating control stations for oxygen and nitrogen, flow rate and pressure control valve set, and other important instruments are centralized in one managing station that is isolated from production site of blast furnace. Its advantages include high sensitivity of whole apparatus, reliable operation and long service life.

Anaerobic fermentation technical method of septic tank sediments by assist of industrial waste heat

The invention provides an anaerobic fermentation technical method of septic tank sediments under the assist of industrial waste heat, belonging to the technical field of an environment-friendly energy. The invention is characterized in that the method comprises the following steps of: taking septic tank sediments as a raw material under the condition that the temperature provided by the industrial waste heat is 55 DEG C; adding liquid dung which is adjusted to ensure that pH=7.2-7.4 and Ts=8%-10% into an anaerobic fermentation pot; stirring and fermenting the mixture; when enriched strains meet the condition that fermentation pot operates at the full load, normally generating gas; stopping stirring before fermentation gas generation reaches an inflection point at each time; extracting 2/3 fermenting fluid to produce fertilizer, fermenting the remaining 1/3 fermenting fluid to generate marsh gas; rinsing, desulfurizing, drying and storing the marsh gas in a canning way after the marsh gas ...

Energy-saving slag thermal insulator

The invention relates to an energy-saving slag thermal insulator, and belongs to the technical field of energy conservation, emission reduction and comprehensive utilization in the metallurgy industry. The thermal insulator comprises the following main chemical components in percentage by weight: 25 to 70 percent of SiO2, 1 to 25 percent of Al2O3, 1 to 40 percent of CaO, 0 to 20 percent of MgO, 0 to 10 percent of F<->, 0 to 10 percent of R2O (R is a monovalent metal ion), 0 to 10 percent of Fe2O3, 5 to 60 percent of fixed carbon with bulk density of 0.25 to 0.75g/cm<3>. The thermal insulator has high thermal insulation performance and can reduce the thermal loss of high-temperature slag; the thermal insulator contains a certain amount of fixed carbon, so heat generated in the chemical reaction of the fixed carbon can be used for further making up the thermal loss of the slag; meanwhile, the thermal insulator belongs to a silicon-aluminum material, and part or all of the thermal insulator ...

Composite flocculant of polymeric ferric magnesium sulfate silicate containing boron

The invention relates to a composite flocculant of polymeric ferric magnesium sulfate silicate containing boron (PFMSSB) used for treating coking waste water, and belongs to the field of environmental engineering. The invention is characterized in that the molar ratios of components of polymeric ferric magnesium sulfate silicate containing boron (PFMSSB) are as follows: Fe/Si is equal to the range from 0.8 to 2.5, Mg/Fe is equal to the range from 0.3 to 1.5, and B/Si is equal to the range from 0.2 to 0.4; and the preparation method of the composite flocculant comprises the following steps: a certain amount of sodium silicate is weighed and dissolved in distilled water to make a solution containing 2% to 3% (by mass) of SiO2, the pH value of the solution is adjusted with sulfuric acid and sodium hydroxide until the activated pH value ranges from 2 to 3, and a polymerization reaction is allowed at room temperature for 10 to 30 minutes; ferric sulfate, magnesium sulfate and sodium tetraborate ...

Gas supply and control device for spraying oxygen in blast furnace

Pyroxene ceramic and preparation method thereof

The invention discloses a pyroxene ceramic (also called as pyroxene-quality ceramic), and a preparation method thereof, belonging to the fields of ceramic preparation and comprehensive utilization of resources. The pyroxene ceramic novel ceramic which takes silicon oxide, calcium oxide as well as magnesium oxide, aluminum oxide or ferric oxide as main components. The main raw materials of the pyroxene ceramic can be solid wastes or low-quality mineral raw materials with calcium, iron or magnesium, and the pyroxene ceramic comprises the following main components in percentage by mass: 30-56% of SiO2, 12-30% of CaO, 3-25% of MgO, 2-18% of Al2O3 and 0.1-18% of Fe2O3. The pyroxene ceramic adopts a production process same as that of the conventional ceramic, a procedure of deironing can be canceled, a rapid cooling process can be adopted in the sintering and cooling process. Pyroxene minerals are taken as the principal crystalline phase of the pyroxene ceramic, heavy metal ions can be subjected ...

GASIFICATION METHOD OF FLUIDIZING POWDER COAL

Energy-saving slag thermal insulator

The invention relates to an energy-saving slag thermal insulator, and belongs to the technical field of energy conservation, emission reduction and comprehensive utilization in the metallurgy industry. The thermal insulator comprises the following main chemical components in percentage by weight: 25 to 70 percent of SiO2, 1 to 25 percent of Al2O3, 1 to 40 percent of CaO, 0 to 20 percent of MgO, 0to 10 percent of F<->, 0 to 10 percent of R2O (R is a monovalent metal ion), 0 to 10 percent of Fe2O3, 5 to 60 percent of fixed carbon with bulk density of 0.25 to 0.75g/cm<3>. The thermal insulator has high thermal insulation performance and can reduce the thermal loss of high-temperature slag; the thermal insulator contains a certain amount of fixed carbon, so heat generated in the chemical reaction of the fixed carbon can be used for further making up the thermal loss of the slag; meanwhile, the thermal insulator belongs to a silicon-aluminum material, and part or all of the thermal insulator ...

High-temperature anaerobic fermentation process method for pretreating municipal sludge by using industrial waste heat

The invention belongs to the technical field of environment friendly energy, in particular to a high-temperature anaerobic fermentation process method for pretreating municipal sludge by using industrial waste heat, which comprises the following steps: carrying out pyrohydrolysis pretreatment on the municipal sludge used as a raw material under the condition of 102-115 DEG C provided by the industrial waste heat, and feeding the treated raw material into a high-temperature anaerobic fermentation system the temperature of which is 50-52 DEG C. Compared with marsh gas produced by the traditional high-temperature anaerobic system, the methane content is increased by 20-30%, the pure methane yield is increased by 40-50%, and the methane production peak is put ahead about two days. The invention has the advantages of simple technical process, high methane content (60-85%) of the produced marsh gas, low dependence of the process flow on primary energy and low production cost and operation cost ...

Anaerobic fermentation technical method of septic tank sediments by assist of industrial waste heat

The invention provides an anaerobic fermentation technical method of septic tank sediments under the assist of industrial waste heat, belonging to the technical field of an environment-friendly energy. The invention is characterized in that the method comprises the following steps of: taking septic tank sediments as a raw material under the condition that the temperature provided by the industrial waste heat is 55 DEG C; adding liquid dung which is adjusted to ensure that pH=7.2-7.4 and Ts=8%-10% into an anaerobic fermentation pot; stirring and fermenting the mixture; when enriched strains meet the condition that fermentation pot operates at the full load, normally generating gas; stopping stirring before fermentation gas generation reaches an inflection point at each time; extracting 2/3fermenting fluid to produce fertilizer, fermenting the remaining 1/3 fermenting fluid to generate marsh gas; rinsing, desulfurizing, drying and storing the marsh gas in a canning way after the marsh gas ...

Method for extracting ammonium and modifying electrolytic manganese residue

The invention relates to a method for extracting ammonium and modifying electrolytic manganese residue, and belongs to the field of environmental protection. The method comprises the steps: mixing the electrolytic manganese residue with one or more of quick lime, slake lime, carbide slag, steel slag, red mud or other alkaline slag, and heating and calcining the mixture under the condition of 200 to 500 DEG C. By adopting the method, the disadvantage that pollutants are formed in the heating process of the electrolytic manganese residue containing two volatile gases such as nitrogen and sulfur can be ingeniously avoided, the cementitious activity of the heated modified electrolytic manganese residue can be remarkably improved, and the modified electrolytic manganese residue can be used in cement factories, brick factories, concrete mixing plants and the like; more favorable advantages are as follows: the nitrogen element in the electrolytic manganese residue forms ammonia gas which is prepared ...

Method of blowing water vapor to control converter molten bath temperature and soot production

The invention relates to the field of iron and steel metallurgy, in particular to a method of utilizing water vapor to control converter molten bath temperature and soot production. The invention puts forward blowing of oxygen and water vapor by a converter oxygen lance to conduct mixed blowing so as to replace existing pure oxygen blowing, thus reducing the oxygen consumption of ton steel, and by adjusting the mixing ratio of water vapor, the heating rate of the converter molten bath is controlled, the thermodynamic conditions of dephosphorization at the earlier stage of blowing are improved, and the dephosphorization rate is improved. The water vapor participated molten bath reaction absorbs heat, so that local overheating of a jet impact zone can be alleviated, evaporation loss of iron can be effectively inhibited, and at the same time the soot production of the blowing process is also reduced. The method provided by the invention introduces water vapor as a temperature control gas to ...

Method for producing ceramic material by using metallurgic intermediate cladding slag

The invention relates to a method for producing a ceramic material by using metallurgic intermediate cladding slag, and belongs to the field of comprehensive utilization of solid wastes. The intermediate cladding slag comprises 28-50% (exclusive of 28% and 50%) of SiO2, 12-26% (exclusive of 12% and 26%) of CaO, 10-25% (exclusive of 10% and 25%) of MnO, 1.5-20% (exclusive of 1.5% and 20%) of Fe2O3, and 10-35% (exclusive of 10% and 35%) of (MgO+Al2O3); and ceramic raw materials comprise 25-100% of the intermediate cladding slag, and also comprise 0-50% of clay, 0-25% of feldspar and 0-15% of quartz as key ingredients. The raw materials are processed and sintered through a traditional ceramic technology to obtain the above ceramic product, the highest sintering temperature is 1050-1150DEG C, the flexural strength exceeds 60MPa, and the water absorption rate is smaller than 2%; and the compressive strength of ceramic sintered bricks made by adding aggregates to the raw materials can exceed ...

Method for preparing electrolytic manganese slag ecological cement

The invention discloses a method for preparing electrolytic manganese slag ecological cement, and belongs to the field of building materials and environment protection. The cement is characterized by consisting of calcined electrolytic manganese slag, blast furnace slag, a clinker, gypsum and an additive. The method comprises the following steps of: crushing the electrolytic manganese slag and then calcining the crushed slag at the temperature of between 500 and 900 DEG C, wherein the activity of the slag is increased to be close to that of fly ash from zero activity of volcanic ash; and grinding the blast furnace slag, the clinker, the fly ash or steel slag, the gypsum and the additive together or respectively according to a certain proportion and uniformly mixing the materials to prepare the electrolytic manganese slag ecological cement, wherein the amount of the calcined electrolytic manganese slag in the mixture is 10 to 50 percent. The method has the advantages of circularly utilizing ...

Converter turbid circulating water treatment method utilizing superconductive high-gradient magnetic field

The invention relates to a converter turbid circulating water treatment method utilizing a superconductive high-gradient magnetic field, belonging to the fields of environmental protection and treatment of industrial waste water difficult to treat. The method is characterized in that under a superconductive high-gradient magnetic field, converter turbid circulating water is treated by using an inclined board settling basin and a high-gradient treater; the strong magnetization and strong adsorption effects of the superconductive high-gradient magnetic field can be used for adsorbing strongly magnetic ferric oxide substances in waste water and also can be used for adsorbing weakly magnetic substances and even nonmagnetic substances, such as calcium oxide, silicon dioxide, magnesium oxide, and the like; the suspended particle density of the treated waste water is reduced to 5mg/L from 1,216mg/L, the turbidity is reduced to 22.25 NTU from 2873.5 NTU, and the two indexes both reach the national ...

Architectural ceramic prepared from industrial solid waste through dry method and process for preparing architectural ceramic

The invention discloses architectural ceramic prepared from industrial solid waste through a dry method and a process for preparing the architectural ceramic. The architectural ceramic comprises the following components in percentage by mass: 30-60% of solid waste, 40-70% of ceramic raw material and 1-3% of ceramic additive, wherein the ceramic raw material is selected from one or a composition of multiple of clay raw material, feldspar raw material or talc, and the ceramic additive is one or a combination of multiple of sodium tripolyphosphate, sodium silicate, ammonium chloride, ammonium citrate, sodium humate, sodium lignin sulfonate sodium, ethylenediamine tetraacetic acid disodium and edetic acid. After being pretreated, the granules of the solid waste are fine and are mixed evenly in a dry mixing manner and a spray drying manner and are directly used for pressing of green bricks or stored in a bin for standby, so that the ball milling energy consumption and the peptization cost are ...

Method for preparing ceramic tiles from calcium silicate slag

The invention relates to a method for preparing ceramic tiles from calcium silicate slag, belonging to the field of comprehensive utilization of resources and novel technologies for ceramic preparation. The ceramic tiles contain the following raw materials in percentage by weight: 30-60% of calcium silicate slag, 10-30% of clay, 2-25% of quartz, 0-20% of feldspar, 0-10% of pyrophyllite, 0-10% of green coke and 0-10% of talc. According to the method, ceramics are produced from calcium silicate slag, so that the stacked discharge of calcium silicate slag is reduced, the aim of resource recycling is achieved, and a new way for the high-added-value utilization of calcium silicate slag is added; the utilization ratio of calcium silicate slag in calcium silicate slag ceramics can reach 60%; by using the characteristic that a great deal of alkali metal ions are contained, a feldspar raw material can be replaced partially or totally, and the ceramic tiles are produced under the low-temperature ...

Catalyst for purifying tail gas from automobile by treating nitrogen oxides thereof

Method for treating waste CRT (cathode ray tube) and preparing glass ceramics by using slag

The invention provides a method for treating waste CRT (cathode ray tube) and preparing glass ceramics by using slag, belonging to the field of comprehensive utilization of resources. The full name of CRT is Cathode Ray Tube, namely cathode ray tube. The method disclosed by the invention comprises the main process as follows: prepared waste CRT powder is synchronously added into the slag in proportion in the process of high-temperature metallurgical slag discharge, and the blended slag is further used as a material for preparing the glass ceramics. According to the method disclosed by the invention, the heat of the slag is directly utilized, a large amount of waste CRT can be treated, heavy metal ions in the slag can be solidified, and a product with a high additional value can be prepared, so that the method has good economic and social benefits and is suitable for large-scale application in industrial production.

Catalyst for purifying tail gas fro mautomobile by treating nitrogen oxides thereof

Through the reserch and test of the catalyzing property of various single metallic oxides and composite oxides to the NO/CO reaction, the inventors obtain a kind of new type composite meltallic oxides catalyst Re-Ni-Co-Cu-Ox/Fe2O3 which using Fe2O3 as carrier, Re, Ni, Co and Cu as active ingredients. Said catalyst can be made directly by high temp. roasting. The technological process is simple, the grain strength and catalyzing activity for removing NOx reaction are all good, beside the resistance for sulfur poisoning and anti-collecting carbon property are all good and stable.

一种提高高炉热风炉热风温度的装置

The invention is a kind of device for upgrading the temperature of high furnace hot-air, which belongs to metallurgy field, especially applies to upgrade the temperature of high furnace puddling process. The device is made up of hot-air furnace, combustion device, hot-air, hot coal gas, the character lies in: the invention sets a special front preheating furnace between hot-air furnace and combustion gas source before the assistant air, high furnace coal gas inters the hot-air furnace combustion device, the front preheating furnace is made up of cold coal gas, cold air, combustion device, coal gas, air, air heat exchanger, high furnace coal gas heat exchanger, smoke outlet. The high temperature smoke generated by the high furnace coal gas combustion enters the front combustion furnace, part of the heat are sent to the air heat exchanger, the residue smoke preheats the cold air and is discharged off through outlet. The invention takes advantages of the smoke, upgrades the temperature of ...

High temperature fume dust removal, desulfurization device and its control technology

Converter turbid circulating water treatment method utilizing superconductive high-gradient magnetic field

The invention relates to a converter turbid circulating water treatment method utilizing a superconductive high-gradient magnetic field, belonging to the fields of environmental protection and treatment of industrial waste water difficult to treat. The method is characterized in that under a superconductive high-gradient magnetic field, converter turbid circulating water is treated by using an inclined board settling basin and a high-gradient treater; the strong magnetization and strong adsorption effects of the superconductive high-gradient magnetic field can be used for adsorbing strongly magnetic ferric oxide substances in waste water and also can be used for adsorbing weakly magnetic substances and even nonmagnetic substances, such as calcium oxide, silicon dioxide, magnesium oxide, and the like; the suspended particle density of the treated waste water is reduced to 5mg/L from 1,216mg/L, the turbidity is reduced to 22.25 NTU from 2873.5 NTU, and the two indexes both reach the national ...

Metal liquid pulse inoculation treating method

The impulse inoculating treatment method for molten metal is characterized by that said method possesses extensive application range, has no contamination to molten metal, and its inoculated nucleus is stable, not easily declined, it can raise mechanical property of casting blank (casting) and its operation is convenient. Besides, said invention is implemented by means of impulse inoculation treatment of steel and aluminium-copper alloy.

Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field