17 results about "Aluminium sulfate" patented technology

The invention discloses a method for recovering high-purity fluorine and silicon from fluorine-silicon slag and co-producing a low-alkali fluorine-free accelerator, which comprises the following steps: S1, dissolving the fluorine-silicon slag in a sodium hydroxide solution to obtain a solution A; s2, adding dilute sulphuric acid into the solution A, reacting until gel is obtained, and filtering to obtain filtrate A and high-purity silicon dioxide gel; s3, adding calcium sulfate and EDTA (Ethylene Diamine Tetraacetic Acid) into the filtrate A, stirring and reacting, and filtering after the reaction is finished to obtain calcium fluoride and filtrate B; and S4, taking clear water, heating, carrying out heat preservation, then adding aluminum sulfate, lithium sulfate, diethanol amine and the filtrate B obtained in S3, continuously stirring until the aluminum sulfate is completely dissolved, then adding hydrated magnesium silicate, continuously carrying out heat preservation stirring, and obtaining the low-alkali fluorine-free accelerator after stirring is finished. The method is simple in process and easy to implement industrially, and fluoride and silicon oxide obtained through separation are high in purity and beneficial to follow-up extension application; more importantly, high-value recycling of the fluorosilicon slag is achieved, and the problems of stockpiling waste and environmental pollution of the fluorosilicon slag are solved.

The application discloses a layered silicate gangue inhibitor for fine-grained copper ore flotation and a preparation method thereof. The inhibitor is composed of the following components: modified polysaccharide organic polymer 15-30%, sodium hexametaphosphate 10-30%, acrylic acid 7-15%, acrylamide 1-5%, ammonium persulfate 2-5%, hydroxyethylidene diphosphonic acid 5-15%, aluminum sulfate 2-5%, and deionized water in a residual amount. The preparation method comprises the following steps: mixing modified polysaccharide and deionized water according to a mass ratio of 1:1-1:2 to prepare solution A; polymerizing acrylic acid and acrylamide to prepare solution B; mixing solution A and solution B, and adding a formula amount of sodium hexametaphosphate to react; then adding a formula amount of hydroxyethylidene diphosphonic acid and a formula amount of aluminum sulfate to carry out complex adjustment; and finally, aging, filtering and obtaining the product. The inhibitor has a strong selective inhibiting effect on talc, phlogopite and other layered silicate gangues, can significantly improve the copper concentrate grade and recovery rate, has a small dosage, is non-toxic and environment-friendly, and can be biodegraded.

The invention discloses a low-temperature early-strength low-viscosity liquid accelerator and a compound production process thereof, and relates to the technical field of concrete admixtures. The accelerator is formed by compounding a basic framework component, a rheological stabilizing component and a low-temperature early strength component. The basic framework component comprises an inorganic aluminum salt coagulant, anhydrous magnesium sulfate, diethanol amine and water; the rheological stabilizing component comprises liquid polyaluminum sulfate, an amphoteric inner salt viscosity reducer and cationic nano silicon dioxide sol; the low-temperature early-strength component comprises water-soluble organic aluminum salt, zirconyl sulfate, lithium acetate and water. The amphoteric inner salt viscosity reducer is matched with the cationic nano silicon dioxide sol, so that the rheological stability of the accelerator under a low-temperature condition is improved; through cooperation of the water-soluble organic aluminum salt, the zirconyl sulfate and the lithium acetate, the early strength development capability of the accelerator under a low-temperature condition is improved.

The invention provides simulated water for testing an ultrafiltration water purifier as well as a preparation method and application of the simulated water. The simulated water for testing the ultrafiltration water purifier comprises test water, escherichia coli, humic acid, montmorillonite, aluminum hydroxide and aluminum sulfate. The concentration of montmorillonite in the simulated water for testing the ultrafiltration water purifier is 0.5-2g / L. The preparation method of the simulated water for testing the ultrafiltration water purifier is simple to operate, the bacterial solution, the humic acid stock solution, the montmorillonite stock solution, the aluminum hydroxide stock solution and the aluminum sulfate are mixed with the test water to prepare the simulated water containing colloids, organic matters and bacteria, and the water quality of various tap water can be accurately simulated; the method can be used for evaluating and testing the performance of the ultrafiltration water purifier filter element, field water taking testing is not needed, and the filter element testing cost is reduced.

The present application belongs to the field of building materials and solid waste resource utilization, and relates to a red mud-based cementing material and a preparation method based on efficient drying-component homogenization-activity promotion. A filter aid is added to the red mud for sedimentation, and then pressure filtration is performed to obtain a solid material with a moisture content of 14-16%, which is then dried to a moisture content of less than 4%, and finally ground to obtain the red mud-based cementing material. The filter aid comprises the following raw materials: 10-30 parts of polyaluminum chloride, 5-15 parts of polyaluminum sulfate, 1000-1200 parts of blast furnace slag or fly ash, 700-900 parts of steel slag, 400-600 parts of carbide slag or alkali slag, and 300-400 parts of desulfurization gypsum or phosphogypsum or fluorogypsum. The present application not only improves the dewatering efficiency of the red mud, but also simplifies the preparation process of the red mud-based cementing material by preparing the red mud-based cementing material in one step, and the prepared red mud-based cementing material has the advantages of high mechanical strength, high durability and erosion resistance.

This invention relates to the field of coagulant technology and discloses a polyaluminum ferric silicate coagulant and its preparation method, comprising the following steps: S1 coal gangue is calcined to obtain modified coal gangue; S2 modified coal gangue is acid-leached to obtain coal gangue acid leaching solution; S3 the coal gangue acid leaching solution is subjected to titanium doping, pH adjustment, polymerization, centrifugation, and aging to obtain the coagulant. The preparation method provided by this invention, after activation and modification, undergoes acid leaching, polymerization, centrifugation, aging, and drying to prepare the polyaluminum ferric silicate coagulant. By optimizing the calcination temperature, modification ratio, acid concentration, polymerization pH, polymerization temperature, and polymerization time, the coagulation performance of the coagulant can be improved, thereby increasing the wastewater pollutant removal rate.

The application discloses a preparation process of a bimodal pore metal de-remover carrier for a residue oil, which comprises the following steps: (1) mixing an aluminum sulfate solution and a sodium metaaluminate solution, adjusting the pH of the system to be acidic, heating the system to react, and then aging the system after the reaction is completed; (2) continuously adding an alkaline substance to adjust the pH of the system to be alkaline, then heating the system to react, and then aging the system under the heating condition after the reaction is completed; (3) separating a solid product, washing the solid product, slurry treating the solid product, adding a liquid pore structure additive and a pH regulator into the system, and adjusting the pH of the system to be alkaline; (4) separating a solid product in the system in the step (3), and then performing a residual burning treatment on the solid product to obtain a modified material; mixing the modified material with pseudo-boehmite powder, a extrusion aid, a solid pore structure additive and silica sol, granulating and forming the mixture, and then sequentially performing drying and calcination treatment on the mixture to obtain the metal de-remover. The metal de-remover prepared by the process has the characteristics of bimodal pore and high strength.

The invention relates to a method for preparing aluminum sulfate from an iron-containing aluminum sulfate solution, and belongs to the technical field of inorganic chemical processes and industrial waste recycling. The method comprises the following steps: carrying out double salt reaction on an iron-containing aluminum sulfate solution and an ammonium source, crystallizing, and separating out aluminum ammonium sulfate double salt crystals and crystallization mother liquor; when the concentration of Fe < 3 + > in the iron-containing aluminum sulfate solution is greater than 0, firstly carrying out ferric iron reduction by adopting a reducing agent and then carrying out double salt reaction; at the starting moment of the double salt reaction, the molar ratio of total NH4 < + > in the solution to Al < 3 + > in the solution is (0.8-2): 1; and roasting the aluminum ammonium sulfate double salt crystal to remove ammonium to obtain aluminum sulfate and roasting gas. According to the method, an iron removal and crystallization separation process including reduction of ferric iron, addition of an ammonium source, double salt crystallization and roasting for ammonium removal is adopted, so that the content of key iron impurities in formed anhydrous aluminum sulfate crystals is lower than 0.01%.

The utility model relates to the field of separation device, concretely is a kind of aluminium sulfate separation device.The utility model relates to the field of separation device, including base, the separation tank of fixed setting in base top, the installation slot of being opened in the front side of separation tank and the guide chute of fixed setting in the top of separation tank, the filter assembly is arranged in the inside of separation tank.By setting movable filter plate, and then after a period of time, it can be removed to replace cleaning, prevent filter plate from being filter residue in aluminium sulfate liquid corrosion and lead to the problem of poor filtering effect, to further ensure the normal filtration of equipment, while can avoid the problem that filter plate is corroded and lead to pollute aluminium sulfate liquid, to ensure the quality of aluminium sulfate liquid.

The invention relates to the technical field of building materials, in particular to a flame-retardant impact-resistant fiber-reinforced paving floor for a coal mine and a preparation method of the flame-retardant impact-resistant fiber-reinforced paving floor. The paving floor is prepared from the following raw materials: modified glass fibers, modified inorganic filler, modified epoxy resin, a curing agent, a toughening agent and a flame-retardant synergist. The glass fiber is etched by phosphoric acid and is loaded with the aluminum hydroxide and zinc borate composite flame-retardant layer, so that the interface bonding and flame-retardant efficiency is improved. The coal gangue-based inorganic filler is gradually coated with the magnesium chloride and aluminum sulfate composite salt and ammonium polyphosphate, so that a stable and flame-retardant synergistic reinforced framework is constructed. The epoxy resin realizes organic combination of solidification phase and gas phase flame retardance through blending intercalation of ammonium polyphosphate, melamine cyanurate and magnesium hydroxide, so that the final product is excellent in flame retardant grade, efficient in smoke suppression, improved in impact strength, good in moisture resistance and corrosion resistance, and good in flame retardance. And the device can adapt to the wet and frequent vibration environment of the underground coal mine roadway.

The invention relates to an aluminum alloy surface environment-friendly chemical passivator and a preparation method and application thereof, and belongs to the technical field of metal surface treatment. The passivating agent is in a liquid state and is prepared from the following raw materials: 60 g / L-80 g / L of potassium permanganate, 36 g / L-54 g / L of aluminum sulfate, 0.9 g / L-1. 2 g / L of a stabilizer, 100 ml / L-200 ml / L of concentrated sulfuric acid and the balance of water in each liter of solution; the stabilizer is prepared from sodium stannate, sodium pyrosulfate and 8-hydroxyquinoline; the passivator is prepared by fully mixing the raw materials. According to the application method, the aluminum alloy with the clean and dry surface is soaked in the passivating agent, and a passivation layer can be formed on the surface of the aluminum alloy; the treatment time of the application is shortened to 0.5 min-2 min, meanwhile, the applicable temperature range is expanded to 35 DEG C-50 DEG C, and the feasibility of industrial production is greatly improved.

The application discloses a kind of catalysis-flocculation synergistic high-efficiency aluminium sulfate treating agent, belong to wastewater treatment technical field.The high-efficiency aluminium sulfate treating agent includes the following components: composite catalysis-flocculation material, aluminium sulfate, solve the problem that traditional single flocculant is limited in efficiency, narrow in scope in wastewater treatment;Through the synergistic effect of organic and inorganic flocculants, and introduce the composite material with photocatalytic and flocculation performance, effectively improve the removal efficiency of suspended solids, heavy metal ions and organic matter in water, realize the collaborative management of various pollutants;The treating agent preparation process is simple, process condition is mild, cost is lower, with good environmental and economic benefits, suitable for industrial wastewater, municipal sewage and complex water purification treatment.

An aluminum sulfate preparation system comprises a concentrated sulfuric acid storage tank, a tap water storage tank, an aluminum hydroxide batching tank and an aluminum sulfate reaction kettle, a sulfuric acid outlet of the concentrated sulfuric acid storage tank is connected into the aluminum sulfate reaction kettle, and a tap water outlet of the tap water storage tank is connected into the aluminum hydroxide batching tank and the aluminum sulfate reaction kettle. Solid aluminum hydroxide is weighed and then put into an aluminum hydroxide batching tank to be mixed with tap water to form aluminum hydroxide slurry with certain concentration, a slurry outlet of the aluminum hydroxide batching tank is connected into an aluminum sulfate reaction kettle, the upper part of the aluminum sulfate reaction kettle is connected with a tail gas absorption device, and the lower part is connected with an aluminum sulfate crystallization device. Compared with the prior art, supply of raw materials can be accurately controlled, the raw materials are fully reacted in the reaction kettle through regular stirring of the aluminum hydroxide batching tank and the stirrer in the aluminum sulfate reaction kettle, and the production efficiency and the purity of products are improved by controlling the temperature and the pressure in the reaction kettle; the kettle body can resist sulfuric acid corrosion, and the maintenance cost is reduced.

The invention belongs to the technical field of extraction of vanadium oxide from vanadium slag, and relates to a method and a system for removing impurity silicon in sodium vanadium solution. The method comprises the following steps: S100, adjusting the pH value of the sodium vanadium solution, and maintaining the pH value of a solution system at 8.0-10.0 to obtain a pretreated sodium vanadium solution; s200, heating the pretreated sodium vanadium solution, and sequentially adding aluminum sulfate and chromium sulfate for deep removal reaction of Si to obtain reaction slurry; and S300, the reaction slurry is subjected to standing sedimentation and solid-liquid separation in sequence, and purified vanadium liquid is obtained. According to the method disclosed by the invention, low-dosage aluminum sulfate which is lower than the theoretical dosage of Al < 3 + > salt for silicon removal can be added into a sodium vanadium solution system, so that Si in the solution is precipitated and removed in the double hydrolysis reaction of Al < 3 + > and SiO3 < 2->, and Al is not brought into the solution.

The application discloses a method for preparing high-activity polymeric aluminum sulfate flocculants from secondary aluminum ash, which comprises the following steps: mixing a phosphoric acid solution and a sulfuric acid solution, adding secondary aluminum ash, stirring, drying, calcining, adding water, stirring, solid-liquid separation, adding a sodium hydroxide solution into the liquid to adjust pH, low-temperature plasma irradiation, and drying to obtain the high-activity polymeric aluminum sulfate flocculants. The high-activity polymeric aluminum sulfate flocculants are prepared from the secondary aluminum ash through acid leaching, calcining and low-temperature plasma irradiation, the effective resource utilization of the secondary aluminum ash is realized, and compared with the existing polymeric aluminum sulfate and polymeric aluminum chloride, the high-activity polymeric aluminum sulfate flocculants have more excellent flocculation performance and can more efficiently remove total phosphorus, ammonia nitrogen, COD and heavy metal pollutants in polluted water bodies.

This invention discloses a zero-discharge treatment process for industrial wastewater from nano-calcium carbonate production, comprising the following steps: a. conveying industrial wastewater from nano-calcium carbonate production into a sedimentation tank; b. adding polyaluminum sulfate to the sedimentation tank and stirring to lower the pH of the industrial wastewater; c. then adding polyaluminum chloride to the sedimentation tank and stirring to perform adsorption and coagulation. If there are few flocs and a large amount of residual turbidity in the sedimentation tank, the dosage is too small; if the flocs are large and rise to the surface, the dosage is too large, and adjustments should be made accordingly. In this invention, the wastewater obtained after this wastewater treatment process will meet the standards for recycling and reuse, achieving zero discharge of wastewater from nano-calcium carbonate production. This process is simpler and more efficient than traditional wastewater treatment processes, effectively solving the pain points of high energy consumption and high cost of traditional processes, while also conforming to green and sustainable development.

The application relates to the technical field of admixtures of building material chemistry, and particularly discloses a low-temperature alkali-free accelerator and a preparation method thereof. The low-temperature alkali-free accelerator comprises the following components in parts by weight: 36.5-38.5 parts of polymeric aluminum ferric sulfate, 4-4.8 parts of condensed aluminum phosphate, 4.2-4.8 parts of modified red mud, 0.65-0.75 parts of carboxymethyl chitosan, 2.6-2.9 parts of dimethyl sulfoxide, 7.5-8.5 parts of wollastonite powder, 3.8-4.2 parts of calcium formate and 32.5-37.5 parts of deionized water. Through the adoption of specific raw material proportioning, the performance of the low-temperature alkali-free accelerator can remain stable after long-term storage in a low-temperature environment below 0 DEG C under the synergistic cooperation of the raw materials.