Method for producing cryolite

The invention discloses a new method for producing cryolite, which comprises the following steps: Bayer process concentrate solution, hydrofluoric acid and caustic soda are used as raw materials, under normal temperature and pressure, the caustic soda is added into Bayer process concentrate solution, and continuous stirring is performed during adding; when the caustic soda is adequately dissolvedto form composite solution, which is guided into a metering tank together with hydrofluoric acid; the prepared composite solution and hydrofluoric acid are simultaneously added into a synthesis tank via the metering tank, the feeding process is conducted along with the reaction; stirring is done continuously during the process of reaction, so that the feeding process is completed along with the reaction, so as to obtain cryolite slurry; finally, after filtering and drying, the finished cryolite is produced. The cryolite synthesized by adopting the production method in the invention has the advantages ...

Production process of preparing cogeneration concrete from flur-gypsum

The invention discloses a process for producing sulfuric acid integrated with cement by fluorgypsum. The method uses fluorgypsum, clay, pulverized fuel ash, anthracite and additive as materials, and comprises the following steps of: grinding each material into fine particles and mixing the fine particles uniformly; drying the mixed materials; leading the mixed materials into a rotary kiln for calcining after drying; directly using kiln gas after calcination to dry the mixed materials so as to cool the kiln gas after drying; purifying the kiln gas containing sulfur dioxide; and using the prior art to produce a sulfuric acid product with the content over 98 percent after purification; cooling and crushing clinkers generated by calcining the materials in the rotary kiln; adding mixed materials of the clay and the pulverized fuel ash into the clinkers; and then grinding the clinkers and the mixed materials into powder lot, and finally packing the powder lot to acquire a cement product. The ...

Production method of producing sulfuric acid cogeneration concrete using flur-gypsum

The invention discloses a method for manufacturing sulfuric acid integrated with cement by fluorgypsum. The method uses fluorgypsum, clay, pulverized fuel ash, anthracite and additive as materials, and comprises the following steps of: manufacturing blocks after each material is grinded and mixed uniformly, or grinding each material into fine particles and mixing uniformly; leading the materials which are manufactured into blocks to a tunnel klin or the uniformly mixed particle materials into a rotary kiln for calcining; performing heat exchange between kiln gas and condensed water after calcination, and purifying sulfur dioxide, and preparing a sulfuric acid product with content over 98 percent through adopting the prior art after purification; and manufacturing slag generated after the preparation of the sulfuric acid into powder lot via cooling, crushing and grinding, and packing the powder lot to acquire cement products. The method is an initiation of manufacturing the sulfuric acid ...

Noctilucent garbage can with self power supply

The invention discloses a noctilucent garbage can with self power supply, which comprises a garbage can barrel (1) and is characterized in that the garbage can barrel (1) is provided with a pneumatic impeller (2), the pneumatic impeller (2) is connected with a minitype generator (3), the minitype generator (3) is connected with a storage battery (4) arranged at the bottom of the garbage can barrel (1) by a lead, the outer surface of the garbage can barrel (1) is also provided with an electric-optical nameplate (5), and the electric-optical nameplate (5) is also connected with the storage battery (4) by a lead. The noctilucent garbage can with the self power supply can emit light at night to remind people of the specific position of the garbage can, and can supply electric energy by depending on self power generation.

Application process for drying aluminium hydroxide fines

The invention provides a process for applying dry aluminum hydroxide fine materials, comprising the following steps: an aluminum hydroxide finished product is obtained from sodium aluminate seminal fluid through crystal seed decomposition, separation and washing; the aluminum hydroxide finished product is dried and then screened so as to form a coarse material part and a fine material part; the coarse material part is used as raw material to be sent into an aluminum fluoride production system; and the fine material part which is dried and screened is used as a crystal seed for a crystal seed decomposition procedure of the sodium aluminate seminal fluid. As the process directly uses the fine material part after screening the aluminum hydroxide for the crystal seed decomposition procedure of the sodium aluminate seminal fluid, the fine material part of which the price per ton is about 300 yuan lower than the aluminum hydroxide finished product can be directly transformed into the normal aluminum ...

Method for preparing aluminum hydroxide and application of combination of methanol and inducer in process for preparing aluminum hydroxide

The application relates to a method for preparing aluminum hydroxide by catalytic decomposition of solution of sodium aluminate, which comprises the following steps: combining the solution of sodium aluminate, a catalyst methanol and an inducer, and performing catalytic decomposition on the solution of sodium aluminate to prepare the aluminum hydroxide, wherein the inducer is selected from aluminum oxide, aluminum oxide hydrate and aluminum hydroxide. The application also relates to application of the combination of the catalyst methanol and the inducer in the process of preparing the aluminum hydroxide by the catalytic decomposition of the solution of sodium aluminate, wherein the catalyst methanol and the inducer are simultaneously used for performing catalytic decomposition, and the inducer is selected from the aluminum oxide, the aluminum oxide hydrate and the aluminum hydroxide.

Polymer composite corrugated expansion joint

The present invention relates to a high-molecular composite corrugated expansion joint. It includes a corrugated pipe, said corrugated pipe interior includes metal corrugated structure layer, high-molecular corrugated erosion-resisting layer and metal corrugated internal supporting layer which are tightly combined together so as to form the invented high-molecular composite corrugated expansion joint.

Method for preparing modified bentonite flocculating agent

The invention relates to a method for preparing natural mineral modified bentonite flocculating agent. A method for preparing the modified bentonite flocculating agent is characterized by comprising the following steps: firstly, preparing ferrous sulfate solution, secondly, preparing sodium bentonite suspension, thirdly, weighing ferrous sulfate solution and sodium bentonite suspension according to mass ratio between ferrous sulfate and sodium bentonite=1:0.08-1:140, dropping the ferrous sulfate solution into the sodium bentonite suspension, obtaining the solution, fourthly, filtering solution, removing filtrate, collecting solid materials in the solution, drying the solid materials under 50 to 400DEG C, disintegrating, obtaining disintegrated solid, fifthly, placing disintegrated solid into a micro-wave oven, radiating with micro wave for 0.5 to 60min under the power of 100 to 800W, and preparing the modified bentonite flocculating agent. The modified bentonite flocculating agent of the ...

Color-developing agent for carbonless copying paper

The invention discloses a color-developing agent for carbonless copying paper. The preparation method of the color-developing agent comprises the following steps of: firstly adding raw materials of salicylic acid and catalyst in a reaction kettle for constantly stirring, then slowly dipping styrene under constant stirring, ageing the mixture at heat preservation for 2 to 6 hours after finishing the dipping of the styrene, adding zinc oxide for stirring, and finally adding terpenes, octylphenol and formaldehyde for reaction so that modified zinc salicylate-terpene phenolic resins are generatedafter the reaction is finished; adding the mixed liquid of water, polyvinyl alcohol, polyacrylamide and nano-level aluminium hydroxide in the generated modified zinc salicylate-terpene phenolic resins for stirring to form a mixture, fully stirring the mixture for emulsification, and then forming particles, packaging to obtain the color-developing agent after being stabilized by a conventional method ...

Method for producing ultra-fine cryolite

The invention discloses a production method for a super fine cryolite, which is characterized in that Bayer process concentrate solution, caustic soda, and hydrofluoric acid are used as raw materials; wherein, caustic soda is added into the Bayer process concentrate solution to obtain complex liquid, which is then added into a synthesis tank together with hydrofluoric acid for reaction, the reaction temperature is 40 to 60 DEG C, and the Ph value is larger than or equal to 10; after adding the materials, ageing is conducted for 20 to 30 minutes; subsequently, after filtering, the filter cake is dried under the temperature of 150 to 300 DEG C until the water content drops below, thus acquiring the finished cryolite. The production method has the advantages that: as the production method is carried out under normal temperature, the process is simple and easy to operate and control; and the heat source comes from heat of reaction, the need for adding a heating apparatus is obviated; by adjusting ...

Method and system for verifying service orchestration process

The invention discloses a method for verifying a service orchestration process. The method comprises the following steps of: modeling a Petri net for a web service-business process execution language (BPEL) service process subjected to service orchestration and converting the service process into a Petri net markup language (PNML) file; analyzing the PNML file and logically verifying the analyzed PNML file; performing simulation test on the logically verified PNML file; and when the test is passed, converting the PNML file into a BPEL service process. The embodiment of the invention provides the method and a system for verifying the service orchestration BPEL process. Before the service orchestration process is formally put into operation, simulation operation is performed on the service orchestration process to realize the verification process of the service orchestration process.

Method for synthesizing cryolite by using waste from aluminum fluoride and trihydrate alumina production

The invention relates to a method for utilizing wastes generated in the manufacturing process of aluminum fluoride and aluminum hydroxide to synthesize cryolite. The method mainly includes the following steps: (1) the condensed fluid is collected and processed; (2) the carbon alkali solution is blended; (3) the condensed fluid and carbon alkali solution are injected into a cryolite synthesizing tank under the normal temperature and pressure and are stirred for synthesis; (4) the cryolite material slurry is obtained through final aging. The invention utilizes the carbon alkali generated in themanufacturing process of aluminum hydroxide to be reacted with the atmosphere condensed fluid generated in the manufacturing process of dry aluminum fluoride under the normal temperature and pressureto synthesize cryolite as a new product, which breaks the limit of a single manufacturing system so as to convert the atmosphere condensed fluid and carbon alkali which are once wasted into useful things ...

Cosmetics-stage cryolite and producing technique thereof

The invention relates to a cosmetic grade cryolite and the production process; wherein, the production process comprises the following steps: high purity Bayer process concentrate solution and high purity ion film caustic soda are compounded into a composite solution, which then reacts with refined hydrofluoric acid in alkaline water phase at 40-60 DEG C, so as to obtain a composition; then a plurality of steps, like final ageing, filtering, washing and baking are conducted over the composition in order to acquire the cryolite with a grain D50 of 1-5 Mu m, a whiteness larger than or equal to 90%, and a molecular ratio of NaF to AlF3 being 1.8-2.2; wherein, the charging proportion relationship among the high purity Bayer process concentrate solution, high purity ion caustic soda and refinedhydrofluoric acid should in accordance with the equation that Al to Na to F is equal to 1 to 1.8-3 to 5-6 (in mol ratio). The cryolite thus produced complies with the sanitary standards for cosmeticarticles ...

New decomposition method of sodium aluminate solution

The invention discloses a new decomposition method of sodium aluminate solution. Compared with the prior art, the method is characterized in that inducer and propellent are added while in decomposition of sodium aluminate solution, the addition amount of the inducer is 10-800g per liter sodium aluminate solution, the addition amount of the propellent is 10-100% volume of the sodium aluminate solution, decomposition initial temperature in decomposition of sodium aluminate solution is 40-80 DEG C, decomposition final temperature is 30-60 DEG C, and decomposition time is 20-30 hours. The inducerand propellent are added in the process of decomposition of sodium aluminate solution, decomposition time is greatly reduced, decomposition rate is improved, and the grain of aluminium hydroxide product can be effectively controlled. The technical scheme of the invention produces no new pollution or waste, is environmentally friendly and energy-saving and has obvious social benefit.

Separation method of mixed liquor of high-alkali sodium aluminate solution and methanol

The invention discloses a separation method of a mixed liquor of a high-alkali sodium aluminate solution and methanol. The separation method comprises the following steps of: evaporating the mixed liquor of the high-alkali sodium aluminate solution and the methanol according to a conventional mother liquor evaporation method to obtain a methanol aqueous solution with a lower concentration and a high-alkali sodium aluminate solution the methanol content of which is qualified; then carrying out high-efficiency rectification by adopting a high-efficiency rectification column and using the methanol aqueous solution with a lower concentration obtained after evaporating as a rectification stock solution; obtaining a liquid methanol finished product through the top of the rectification column; and draining residual liquid in the column from the bottom of the column for collection. The method can effectively separate the high-alkali sodium aluminate solution and the methanol in the mixed liquor ...

Method for producing large grain size cryolite

The invention discloses a production method for a large grain size cryolite, which is characterized in that Bayer process concentrate solution, caustic soda, and hydrofluoric acid are used as raw materials, and the proportion of raw materials is represented in the equation that Al: Na: F equals to 1:1.8-3:5-6; when compounding, the caustic soda is added into the Bayer process concentrate solutionwith a temperature of 90-95 DEG C, and mixed evenly to obtain the composite solution; then, the composite solution and hydrofluoric acid are gradually added into a synthesis tank, and the material feeding and agitation are carried out in the meantime, the reaction temperature is maintained between 85 and 95 DEG C, and the PH value of the reaction solution is smaller than or equal to 2; after feeding materials, the mixture undergoes an ageing process for 20 to 30 minutes; finally, the slurry is filtered, the filter cake is dried until the water content drops below 0.2%, thus acquiring the finished ...

Application process for drying aluminium hydroxide fines

The invention provides a process for applying dry aluminum hydroxide fine materials, comprising the following steps: an aluminum hydroxide finished product is obtained from sodium aluminate seminal fluid through crystal seed decomposition, separation and washing; the aluminum hydroxide finished product is dried and then screened so as to form a coarse material part and a fine material part; the coarse material part is used as raw material to be sent into an aluminum fluoride production system; and the fine material part which is dried and screened is used as a crystal seed for a crystal seed decomposition procedure of the sodium aluminate seminal fluid. As the process directly uses the fine material part after screening the aluminum hydroxide for the crystal seed decomposition procedure of the sodium aluminate seminal fluid, the fine material part of which the price per ton is about 300 yuan lower than the aluminum hydroxide finished product can be directly transformed into the normalaluminum ...

Technique for producing large-granular aluminium hydroxide or aluminum oxide

The invention provides a technique for producing large-granular aluminium hydroxide or aluminum oxide, which includes the following steps: slurrying, dilution, red mud separation, leaf filtration, seed decomposition, cyclone classification, aluminium hydroxide solid-liquid separation and washing. In the process of seed decomposition, the concentration of aluminum oxide in seminal fluid is 161g/l to 200g/l, the caustic ratio Alpha k of the seminal fluid is 1.35 to 1.65, the seed decomposition time is 40 to 72 hours, the seed ratio is 2 to 3, the first-cell solid content is 400g/l to 800g/l, the first-cell decomposition temperature is 60 DEG C to 80 DEG C, and the decomposed seeds are classified by cyclone based on 60 mum of aluminium hydroxide granules. The invention successfully realizes the stable production of large-granular aluminium hydroxide or aluminum oxide, and while obtaining stable product quality, the invention breaks through the passive situation that the granularity of large-granular ...

Auxiliary escape stairs

The invention discloses auxiliary escape stairs, comprising a plurality of steps. The stairs are characterized in that: oscillating plates (2) are hinged on upper ends of vertical surfaces of the steps (1); driven gears (3) are fixed on joint parts of the oscillating plates (2) and the steps (1), and are connected with drive gears (5) through chains (4); and the drive gears (5) are connected with a miniature step motor (6) fixed inside the steps (1). The auxiliary escape stairs are simple in structure and smart in design, and can help people quickly and effectively escape from a building.

Method for preparing modified bentonite flocculating agent

The invention relates to a method for preparing natural mineral modified bentonite flocculating agent. A method for preparing the modified bentonite flocculating agent is characterized by comprising the following steps: firstly, preparing ferrous sulfate solution, secondly, preparing sodium bentonite suspension, thirdly, weighing ferrous sulfate solution and sodium bentonite suspension according to mass ratio between ferrous sulfate and sodium bentonite=1:0.08-1:140, dropping the ferrous sulfate solution into the sodium bentonite suspension, obtaining the solution, fourthly, filtering solution, removing filtrate, collecting solid materials in the solution, drying the solid materials under 50 to 400DEG C, disintegrating, obtaining disintegrated solid, fifthly, placing disintegrated solid into a micro-wave oven, radiating with micro wave for 0.5 to 60min under the power of 100 to 800W, and preparing the modified bentonite flocculating agent. The modified bentonite flocculating agent of the ...

Parking lot

The invention discloses a parking lot, which comprises a channel (1) and a parking space (2) and is characterized in that: the channel (1) and the parking space (2) are provided with guide grooves (3); two guide grooves (3) are formed symmetrically; the width of each guide groove (3) is between 300 and 400 millimeters; the interval between the two guide grooves (3) is between 1,700 and 2,000 millimeters; and a green plant growing groove (4) is formed between the two guide grooves (3). The parking lot can prevent automobile collision and keep air fresh.

Method for producing large grain size cryolite

The invention discloses a production method for a large grain size cryolite, which is characterized in that Bayer process concentrate solution, caustic soda, and hydrofluoric acid are used as raw materials, and the proportion of raw materials is represented in the equation that Al: Na: F equals to 1:1.8-3:5-6; when compounding, the caustic soda is added into the Bayer process concentrate solution with a temperature of 90-95 DEG C, and mixed evenly to obtain the composite solution; then, the composite solution and hydrofluoric acid are gradually added into a synthesis tank, and the material feeding and agitation are carried out in the meantime, the reaction temperature is maintained between 85 and 95 DEG C, and the PH value of the reaction solution is smaller than or equal to 2; after feeding materials, the mixture undergoes an ageing process for 20 to 30 minutes; finally, the slurry is filtered, the filter cake is dried until the water content drops below 0.2%, thus acquiring the finished ...

Method for producing ultra-fine cryolite

The invention discloses a production method for a super fine cryolite, which is characterized in that Bayer process concentrate solution, caustic soda, and hydrofluoric acid are used as raw materials;wherein, caustic soda is added into the Bayer process concentrate solution to obtain complex liquid, which is then added into a synthesis tank together with hydrofluoric acid for reaction, the reaction temperature is 40 to 60 DEG C, and the Ph value is larger than or equal to 10; after adding the materials, ageing is conducted for 20 to 30 minutes; subsequently, after filtering, the filter cake is dried under the temperature of 150 to 300 DEG C until the water content drops below, thus acquiring the finished cryolite. The production method has the advantages that: as the production method iscarried out under normal temperature, the process is simple and easy to operate and control; and the heat source comes from heat of reaction, the need for adding a heating apparatus is obviated; by adjusting ...

Method, device and system for realizing automatic flow with manual tasks

The invention discloses a method for realizing automatic flow with manual tasks. Flow analysis is carried out according to business requirements to obtain adopted automatic movement, manual movement and logic relationship; according to the flow analysis result, the automatic movement and the manual movement are modelled; the logic of an XPDL flow is converted into a BPEL flow node, and the BPEL flow node which is obtained by the logic conversion of the XPDL flow is led into an insertion point relating to the manual tasks in the original BPEL flow; the XPDL flow and the BPEL flow led with the BPEL flow node obtained by the logic conversion of the XPDL flow are deployed; and the BPEL flow led with the BPEL flow node obtained by the logic conversion of the XPDL flow is operated. The method reforms the existing XPDL product, and the reformed XPDL product and the BPEL product are integrated, and the method realizes the automatic flow with manual task from three aspects of modelling, operation ...

Color-developing agent for carbonless copying paper

The invention discloses a color-developing agent for carbonless copying paper. The preparation method of the color-developing agent comprises the following steps of: firstly adding raw materials of salicylic acid and catalyst in a reaction kettle for constantly stirring, then slowly dipping styrene under constant stirring, ageing the mixture at heat preservation for 2 to 6 hours after finishing the dipping of the styrene, adding zinc oxide for stirring, and finally adding terpenes, octylphenol and formaldehyde for reaction so that modified zinc salicylate-terpene phenolic resins are generated after the reaction is finished; adding the mixed liquid of water, polyvinyl alcohol, polyacrylamide and nano-level aluminium hydroxide in the generated modified zinc salicylate-terpene phenolic resins for stirring to form a mixture, fully stirring the mixture for emulsification, and then forming particles, packaging to obtain the color-developing agent after being stabilized by a conventional method ...

Polymer composite corrugated expansion joint

Measuring method of phosphorus pentoxide in aluminum hydroxide

The invention relates to a measuring method of phosphorus pentoxide, which has the technical scheme that the measuring method of the phosphorus pentoxide in aluminum hydroxide comprises the following steps: (1) decomposing a sample to prepare an analyzing solution; (2) removing interfering ions in the analyzing solution; (3) adding a color-developing agent to the analyzing solution to measure the absorbance; (4) taking phosphorus standard solutions with different concentrations, and drawing a concentration-absorbance standard curve following the operation of (2) and (3); and (5) looking up the standard curve according to the absorbance value obtained in step (3) and converting the content of the phosphorus pentoxide in the aluminum hydroxide sample. The measuring method is characterized by regulating the analyzing solution to be acidic before adding the color-developing agent in the step (3) and step (4), then adding an overdose of ammonium molybdate color-developing agent, extracting the ...

Composite decoloring method for sodium aluminate solution

The invention relates to a composite decoloring method for sodium aluminate solution, which comprises the following steps: adding the sodium aluminate solution into a reaction tank; adding active carbon supported TiO2 catalyst into the reaction tank; starting up a stirring device and a circulating pump, and performing irradiation treatment by using ultraviolet rays with the light intensity of 5,000 to 10,000cd/m<2>; and filling ozone gas in the sodium aluminate solution for decoloring reaction, wherein the time of the decoloring reaction is determined according to initial chrominance of the sodium aluminate solution and the requirement of final chrominance. The chrominance is judged by measuring the absorbance of the ultraviolet rays with the wavelength of 470nm through a spectrophotometer. The composite decoloring method for the sodium aluminate solution is particularly suitable for quickly decoloring the sodium aluminate with high initial chrominance requirement and low final chrominance ...

Method for synthesizing cryolite by using waste from aluminum fluoride and trihydrate alumina production

The invention relates to a method for utilizing wastes generated in the manufacturing process of aluminum fluoride and aluminum hydroxide to synthesize cryolite. The method mainly includes the following steps: (1) the condensed fluid is collected and processed; (2) the carbon alkali solution is blended; (3) the condensed fluid and carbon alkali solution are injected into a cryolite synthesizing tank under the normal temperature and pressure and are stirred for synthesis; (4) the cryolite material slurry is obtained through final aging. The invention utilizes the carbon alkali generated in the manufacturing process of aluminum hydroxide to be reacted with the atmosphere condensed fluid generated in the manufacturing process of dry aluminum fluoride under the normal temperature and pressure to synthesize cryolite as a new product, which breaks the limit of a single manufacturing system so as to convert the atmosphere condensed fluid and carbon alkali which are once wasted into useful things ...

Method for producing cryolite

The invention discloses a new method for producing cryolite, which comprises the following steps: Bayer process concentrate solution, hydrofluoric acid and caustic soda are used as raw materials, under normal temperature and pressure, the caustic soda is added into Bayer process concentrate solution, and continuous stirring is performed during adding; when the caustic soda is adequately dissolved to form composite solution, which is guided into a metering tank together with hydrofluoric acid; the prepared composite solution and hydrofluoric acid are simultaneously added into a synthesis tank via the metering tank, the feeding process is conducted along with the reaction; stirring is done continuously during the process of reaction, so that the feeding process is completed along with the reaction, so as to obtain cryolite slurry; finally, after filtering and drying, the finished cryolite is produced. The cryolite synthesized by adopting the production method in the invention has the advantages ...

Method for separating high alkali sodium aluminate solution - methyl alcohol mixed liquor

The invention discloses a method for separating a high alkali sodium aluminate solution - methyl alcohol mixed liquor. In the method, the high alkali sodium aluminate solution - methyl alcohol mixed liquor is used as rectification raw liquor to be efficiently rectified in an efficient rectification tower, when the bottom temperature of the tower is controlled to be 60-150 DEG C, the top temperature of the tower is controlled to be 50-100 DEG C, and the reflux ratio R is 0.1-10 in the rectification process; and a liquid methyl alcohol product can be obtained from top of the rectification tower after rectification and high alkali sodium aluminate solution can be obtained from the kettle of the rectification tower with qualified methyl alcohol content for recycle. The invention effectively separates high alkali sodium aluminate solution and methyl alcohol from the high alkali sodium aluminate solution - methyl alcohol mixed liquor, thereby avoiding resource waste and helping environment protection ...

Cosmetics-stage cryolite and producing technique thereof

The invention relates to a cosmetic grade cryolite and the production process; wherein, the production process comprises the following steps: high purity Bayer process concentrate solution and high purity ion film caustic soda are compounded into a composite solution, which then reacts with refined hydrofluoric acid in alkaline water phase at 40-60 DEG C, so as to obtain a composition; then a plurality of steps, like final ageing, filtering, washing and baking are conducted over the composition in order to acquire the cryolite with a grain D50 of 1-5 Mu m, a whiteness larger than or equal to 90%, and a molecular ratio of NaF to AlF3 being 1.8-2.2; wherein, the charging proportion relationship among the high purity Bayer process concentrate solution, high purity ion caustic soda and refined hydrofluoric acid should in accordance with the equation that Al to Na to F is equal to 1 to 1.8-3 to 5-6 (in mol ratio). The cryolite thus produced complies with the sanitary standards for cosmetic articles ...