82 results about "Aluminium sulfate" patented technology

The invention relates to the technical field of cement-based soil curing agents, and particularly discloses a roadbed soil cement cementing material curing agent and a use method thereof. The curing agent comprises Portland cement, coal gangue particles, fly ash, silica fume, an anti-permeability reinforcing agent, a water reducing agent and fibers. The anti-permeability reinforcing agent is prepared by the following steps: (1) dispersing polyaluminum sulfate powder into absolute ethyl alcohol, then adding a silane coupling agent and a water repellent agent, and heating and preserving heat under a stirring condition; and then separating out solids to obtain the modified polyaluminum sulfate. And (2) adding the modified polyaluminum sulfate into water, heating and preserving heat under a stirring condition, drying by distillation to remove water, and grinding the obtained solid product. The curing agent provided by the invention not only reduces the adverse effect of acid soil on the stability of a formed soil consolidated body, but also improves the impermeability and the durability of the soil consolidated body.

The present invention belongs to the field of resource utilization of building materials and solid waste, and relates to a red-mud-based cementing material based on efficient drying, component homogenization and activity improvement, and a preparation method therefor. The preparation method comprises: adding a filter aid to red mud to carry out sedimentation, then subjecting same to filter pressing until the water content is 14-16%, then drying the solid material, which has been subjected to filter pressing, until the water content is 4% or below, and finally grinding same to obtain the product. 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 alkaline residues, and 300-400 parts of desulfurized gypsum or phosphogypsum or fluorgypsum. By means of the present invention, the dehydration efficiency of red mud can be improved, the red-mud-based cementing material can also be prepared in one step; the preparation process for the red-mud-based cementing material is simplified; and the prepared red-mud-based cementing material has the advantages of a high mechanical strength, high durability and erosion resistance.

The invention belongs to the technical field of metal recovery, and discloses a method for recovering indium from indium-containing acidic waste liquid, which comprises the following steps: adding an alkaline solution into the indium-containing acidic waste liquid until the pH value is 8-14 to obtain an intermediate liquid I, adding a flocculating agent into the intermediate liquid I, and carrying out filter pressing to obtain filter residues; the flocculating agent is selected from at least one of polyacrylamide, polyaluminum chloride, polyferric sulfate, polyferrous sulfate and polyaluminum sulfate, the reducing agent is selected from at least one of graphite powder, coke and anthracite, the flocculating agent is selected from at least one of sodium hydroxide, sodium hydroxide and sodium hydroxide, and the reducing agent is selected from at least one of sodium hydroxide, sodium hydroxide and sodium hydroxide. According to the method, indium in the indium-containing acidic waste liquid is preliminarily settled by adjusting the pH value, and then part of residual metal indium with positive charges is further settled and gathered by using the flocculating agent, so that the recovery rate of indium is increased.

The present invention relates to the technical field of preparation of adsorbent materials for removing heavy metals from acidic wastewater, specifically a method for preparing a resin-based magnetic composite adsorbent material, comprising the following steps: using waste expanded resin as a base carrier, ferric chloride as an added magnetic auxiliary substance, mixing magnesium sulfate and aluminum sulfate evenly, stirring at high speed and ultrasonic dispersion, then adding sodium phosphite and sodium hypophosphite and placing them in a microwave reactor, adjusting the pH of the sodium phosphite and sodium hypophosphite in the reactor to precipitate, while the phosphite intercalates into the precipitate, finally filtering the precipitate and washing and drying to obtain a novel adsorbent material for excellent adsorption of heavy metals in acidic mine wastewater. The material prepared by the present invention can effectively adsorb various heavy metal ions such as cadmium, chromium, zinc, lead, manganese, copper, etc. in acidic mine wastewater, has a large adsorption capacity, and the adsorbent material has magnetism and can be regenerated by solid-liquid separation through magnetism.

The invention discloses a red mud acid leaching waste residue modified curing agent and a preparation method thereof, and belongs to the field of environmental protection engineering. The bauxite acid leaching waste residue modified curing agent is prepared from the following raw materials in parts by mass: 30 to 40 parts of magnesium sulfite, 30 to 35 parts of fly ash, 25 to 30 parts of alkaline residue, 1 to 5 parts of sodium sulfite, 1 to 5 parts of white carbon black and 0.5 part of polyaluminum ferric sulfate. Industrial solid waste and bauxite acid leaching waste residues are effectively utilized, and the curing agent has the advantages of being low in cost, simple in preparation method and high in resource utilization rate and is suitable for further application and popularization. According to the method, the pollution of the bauxite acid leaching waste residues can be effectively reduced, the long-term water stability of the bauxite acid leaching waste residue roadbed is improved, the requirement that the bauxite acid leaching waste residues are applied to road construction on a large scale is met, waste is turned into wealth, and non-renewable land resources are saved.

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 present invention relates to the technical field of cement-based soil solidifying agents, and specifically discloses a roadbed soil cementitious material solidifying agent and a using method thereof. The solidifying agent comprises: Portland cement, coal gangue fine particles, fly ash, silica fume, an impermeability enhancing agent, a water reducing agent and fibers. The impermeability enhancing agent is prepared by the following method: (1) Dispersing polyaluminum sulfate powder into absolute ethanol, then adding a silane coupling agent and a water repellent and heating and insulating under stirring conditions. After completion, the solid matter is separated out to obtain modified polyaluminum sulfate. (2) Adding the modified polyaluminum sulfate to water and heating and insulating under stirring conditions. After completion, the water is evaporated to remove the water, and the obtained solid product is ground. The solidifying agent of the present invention not only reduces the adverse effect of acidic soil on the stability of the formed soil solidified body, but also improves the impermeability and the durability of the soil solidified body.

The invention provides an inorganic composite plugging agent suitable for fractured fluid channeling. The inorganic composite plugging agent is prepared from the following raw materials: 25%-35% of oil well cement, 8%-10% of a reinforcing agent, 0.5%-0.7% of a dispersing agent, 0.04%-0.05% of a retarder, 5%-8% of a suspending agent, 0.1%-0.15% of a pH regulator and the balance of water, the reinforcing agent is a mixture of lime, calcium carbonate and aluminum sulfate; the dispersing agent is a mixture of sodium polyphosphate, sodium dodecyl sulfate and sodium dodecyl benzene sulfonate; the retarder is a mixture of sodium gluconate, sulfonated tannin and borax; the suspending agent is a mixture of silicon dioxide, sodium bentonite and soil powder; the pH regulator is a mixture of sodium carbonate, sodium bicarbonate and sodium hydroxide. The invention also provides a preparation method and application for channeling and water plugging of an oil-water well. The inorganic composite plugging agent can solve the problems that an inorganic plugging agent is poor in pumpability and low in strength, and fractured fluid channeling plugging in an oil reservoir is difficult, and meets the requirements for channeling plugging and water plugging of conglomerate and sandstone with the well depth being 1000-5000 m and the temperature being 150 DEG C or above and a dual seepage system.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a polymerization reaction device for producing a polyaluminum sulfate flocculant and a production method. The reaction kettle is formed by combining an upper tank body and a lower tank body, an exhaust pipe is fixed to the top of the upper tank body, and feeding pipes are symmetrically fixed to the side edges of the upper portion of the lower tank body; the mixing structure is arranged in the middle of the reaction kettle, the mixing structure is rotatably mounted below the middle of the upper tank body, the mixing structure comprises a driving shaft, stirring rods are uniformly distributed on the side edge of the driving shaft, and a motor for driving the mixing structure to rotate is fixed at the top of the upper tank body; the scraping assembly is mounted on the driving shaft, and the scraping assembly is driven by the driving shaft to rotate so as to clean foam at the top of the mixed solution in the reaction kettle; the foam on the surface of the mixed solution is cleaned by arranging the scraping assembly, so that gas generated in the reaction process is smoothly discharged upwards from the interior of the solution, and the reaction is promoted to be stably carried out.

The invention relates to the technical field of concrete accelerators, and particularly discloses a high-altitude area sprayable ultra-high performance concrete accelerator, which is prepared from the following raw materials in parts by mass: 30 to 60 parts of aluminum sulfate, 1 to 5 parts of magnesium sulfate, 1 to 2 parts of 3-hydroxy-3-carboxyl glutaric acid, 1 to 3 parts of N, N-diethylethanolamine, 1 to 2 parts of disodium ethylene diamine tetraacetate and 1 to 3 parts of oxidized chitosan. The composition comprises the following components in parts by weight: 5-10 parts of microcrystalline cellulose, 1-2 parts of amino-terminated polyamidoamine, 0.1-1 part of dibutyl phthalate and 0.1-1 part of hydroxyethyl cellulose. The invention further discloses a preparation method of the accelerator for the sprayable ultra-high performance concrete in the high altitude area. The cement is short in setting time and high in strength, the strength within one day can reach 14 MP or above, and the compressive strength ratio within 28 days can reach 119%; the concrete has the advantages of small stimulation to human bodies, safety and reliability, optimizes the construction environment, and can still play a quick-setting role when the environment temperature is relatively low (the lowest temperature is 0 DEG C).

The invention relates to the technical field of harmless treatment of solid wastes, in particular to an environment-friendly harmless method for producing silicon dioxide as a byproduct from solid wastes. The method comprises the following steps: (1) preparing by-product silicon dioxide suspension: adding by-product silicon dioxide into deionized water, and uniformly stirring to fully disperse the by-product silicon dioxide to form the by-product silicon dioxide suspension; (2) adding calcium oxide powder: slowly adding the calcium oxide powder based on the byproduct silicon dioxide into the byproduct silicon dioxide suspension under a stirring condition; (3) adjusting the pH value: stirring, and controlling the pH value of the solution to be 8-9; and (4) adding a fluorine removal agent: adding polyaluminum sulfate as the fluorine removal agent, continuously stirring to enable the fluorine removal agent to fully act, and requiring that the pH value of the final solution is between 6 and 9. The method provides a novel harmless treatment technology for the byproduct silicon dioxide, calcium oxide powder and polyaluminum sulfate are added into the byproduct silicon dioxide suspension, the fluorine ion concentration in the byproduct silicon dioxide can be effectively reduced, the byproduct silicon dioxide can meet the first-class solid waste standard, and environment-friendly treatment of the byproduct silicon dioxide is achieved.

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 combined filter aid for dewatering fine-particle coal slime as well as a preparation method and application of the combined filter aid. The combined filter aid comprises a filter aid A, a filter aid B and a filter aid C, the filter aid A comprises polyaluminum chloride and polyaluminum sulfate in a mass ratio of (1-2.4): 1; the filter aid B comprises 100-mesh hydrophobic particles and 200-mesh hydrophobic particles in a mass ratio of (0.4-0.8): 1; the hydrophobic particles are zeolite subjected to surface modification by hydrochloric acid and dodecyl trimethoxy silane in sequence; the filter aid C is a mixed solution of polyacrylamide and a surfactant; the mass ratio of the polyacrylamide to the surfactant is (0.05-0.15): 1. Through the synergistic effect of the filter aid A, the filter aid B and the filter aid C, water in fine-particle coal slime can be efficiently removed, the use amount is moderate, and meanwhile, the filter pressing time of a coal slime filter cake can be effectively shortened.

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 present invention discloses a modified cement slurry composite additive for mining and its preparation method and application, which relates to the field of mining grouting materials and is applied to the reinforcement and management of rock mass fissures in mines. The modified cement slurry composite additive for mining includes the following components by weight: 2-4 parts of modified water reducer, 4-6 parts of bentonite, 1-2 parts of polyaluminum sulfate, 0.5-1 parts of polyaluminum chloride, 4-6 parts of calcium sulfate, 0.5-0.7 parts of hydroxypropyl methylcellulose, 0.6-0.8 parts of modified microcapsules, and 25-35 parts of water. The synthesized modified water reducer includes polysiloxane chains and phenylalanine, has high thermal stability and has both water reduction and mud resistance, and improves the high temperature resistance and compressive strength of cement grouting materials prepared using the composite additive. The dispersibility, thermal stability and UV resistance of the modified polypropylene used in the synthesized modified microcapsules are improved, which enhances the self-healing ability of the cracks of the cement grouting materials prepared using the modified microcapsules.

The present invention provides a reaction kettle for preparing polyaluminum ferric sulfate from the waste catalyst recycling tail liquid, belonging to the technical field of chemical reaction treatment. The reaction kettle includes a reaction kettle, and a circulation pump is arranged at the bottom of the reaction kettle to circulate the raw materials put into the reaction kettle through the circulation pump. After repeated circulation, the raw materials are mixed and stirred multiple times, avoiding the influence of the internal stirring component on the reaction quality of the raw materials, thereby improving the quality of polyaluminum ferric sulfate. The bottom of the conical eddy current chamber is fixedly connected with a return hopper arranged in the inner cavity of the reaction kettle, and the return hopper is communicated with the inner cavity of the conical eddy current chamber. The bottom of the return hopper is communicated with the liquid inlet of the circulation pump. During the mixing of the liquid, when the liquid passes through the eccentric flow holes on both sides, since the eccentric flow holes on both sides are symmetrically located at the eccentric positions, the liquid entering the conical eddy current chamber from both sides forms an eddy current, and the efficiency of liquid circulation is improved through the vortex-type liquid, thereby ensuring the stirring effect of the liquid raw materials.

This invention discloses an Al(OH)3 modified calcium sulfate whisker / epoxy resin thermally conductive composite material and its preparation method, belonging to the technical field of thermally conductive composite material synthesis methods. The method involves adding calcium sulfate whiskers to an aqueous solution of urea and aluminum sulfate octadecahydrate, and obtaining Al(OH)3 modified calcium sulfate whiskers through heating and stirring. These whiskers are then dispersed in a mixed solution of epoxy resin and a curing agent, and the Al(OH)3 modified calcium sulfate whisker / epoxy resin thermally conductive composite material is prepared by casting. The prepared thermally conductive composite material has a dense internal structure, significant thermal conductivity, and good insulation properties. It can effectively dissipate and conduct heat to maintain the normal operating temperature and performance of electronic components. When used in electronic products, it can effectively guide heat outwards, reducing the risk of overheating during electronic component operation.

The invention relates to the technical field of pulping and papermaking, in particular to a rosin size preparation process which comprises the following steps: concentrating and screening paper pulp, feeding the pulp into a slushing pump, and injecting 1235T rosin size at an outlet of the slushing pump according to a proportion of 18kg / t; after the slurry enters the mixing pool, aluminum sulfate is added in three times, the addition amount of the aluminum sulfate on the surface layer / the bottom layer is equal to the ratio of the 1235T rosin size dosage to 0.8, and the pH value of the slurry is controlled to be stabilized at 5.0 + / -0.5; the fixed addition amount of aluminum sulfate in a core layer is 45 + / -5kg / t, and the pH value of the slurry is controlled to be stabilized at 6.1 + / -0.3; 15kg / t of dry strength agent, 5kg / t of talcum powder and 5kg / t of silica sol are simultaneously added into the core layer; the mixed slurry enters a buffer pool, the dispersion particle size is detected, and when the particle size ranges from 25 micrometers to 35 micrometers, the slurry is conveyed to a net part; and carrying out papermaking, and collecting production wastewater and solid waste. The three core problems of large dosage, poor water resistance and high environmental protection load in the traditional 1278 type rosin size process can be solved.

Described herein are new compositions comprising a combination of metal(loid)-based antimicrobials (MBAs) that are effective against bacterial biofilms. In embodiments the composition comprises a combination of metal(loid) selected from: a) at least two metals; and b) at least one metal and at least one metalloid. Examples of metal(s) and metalloid(s) useful in the combination include, silver nitrate, potassium tellurite, hydrogen tetrachloroaurate (III), nickel sulfate, copper (II) sulfate, aluminium sulfate, gallium nitrate, sodium selenite, and zinc sulfate. Some combinations are broad-spectrum while others are especially effective against bacterial biofilms resulting from the growth of Gram-negative bacteria or the growth of Gram-positive bacteria. The compositions may be used in methods for disruption and / or of removal of biofilm present on a surface, or for coating purposes thereby providing anti-biofilm activity to a surface.

The present invention discloses a method for coupling and modifying a biofilm carrier, which specifically includes: dissolving the industrial waste ferrous sulfate heptahydrate of titanium dioxide in water, adding a commercially available biofilm carrier filler and mixing evenly with the ferrous sulfate solution, acidifying the mixed solution with concentrated sulfuric acid, and then adding industrial aluminum sulfate; heating and stirring under the condition of a water bath at 50°C - 80°C, adding concentrated nitric acid for oxidation while stirring, and carrying out a polymerization reaction for 30 - 60 minutes; then adding a stabilizer, separating the biofilm carrier from the polyferric sulfate after standing for a period of time to obtain a modified biofilm carrier and a polyferric sulfate coagulant respectively. The method of the present invention realizes the modification of the biofilm carrier without affecting the preparation of the polyferric sulfate coagulant, and has the advantages of low cost, simple operation, easy industrial popularization, etc.

A method for recovery of metals from Jarosite waste for its effective utilization wherein, the treatment of nitric acid to jarosite waste extracts the nitrates of lead, cadmium, iron, copper, nickel, zinc, aluminum, manganese, cobalt, magnesium and calcium in the filtrate; the treatment of sulfuric acid to the residue obtained from step (a) extracts the metal in the form of ferrous sulfate, aluminum sulfate, zinc sulfate and calcium sulfate in the filtrate; and the treatment of alkali to the residue obtained from step (a) extracts the metal in the form of sodium silicate and sodium aluminate in the filtrate. The silver present in the Jarosite waste as sulfate / silicate is not extracted in nitric acid, sulfuric acid or alkali. Thus, the remaining residue is enriched with silver concentration to at least 2000 ppm, where silver can be easily recoverable and has good commercial value.

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.

A coagulant comprising a metallic salt and an acid carrier having at least one inorganic salt, an acid, and water. The metallic salt can be ferric chloride, ferric sulfate, aluminum sulfate, polyaluminium chloride, aluminum chlorohydrate, or a combination thereof. The acid carrier may comprise a first inorganic salt and a second inorganic salt. The first inorganic salt can be ammonium sulfate, and the second inorganic salt can be ammonium bisulfate. The acid can be phosphoric acid, a hydrogen halide, nitric acid, sulfuric acid, or a combination thereof. Mixing the coagulant with raw water generates a plurality of acid pockets in the raw water, causing reactions between the blended coagulant and the dissolved organic matter.

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 invention provides a preparation method of a fluorine removal agent, and belongs to the technical field of wastewater treatment.The preparation method comprises the steps that ferric sulfate and aluminum sulfate with the weight ratio being 1: (1.55-1.71) are taken to be prepared into a colloidal solution, then montmorillonite powder is added and mixed to be uniform, an obtained prefabricated material is roasted and smashed, and the fluorine removal agent is prepared. By controlling the dosage of ferric sulfate and aluminum sulfate and matching with specific process steps and parameters, a novel composite adsorption material is prepared, and the particle size, the shape, the structure and the chemical property of the composite adsorption material are effectively controlled, so that the fluorine removal agent with a good fluorine removal effect is obtained.

The invention provides an oily sewage purifier system and a preparation method thereof, and belongs to the field of sewage treatment. The oily sewage purifying agent system is composed of a composite coagulant and an organic polymeric flocculant. Wherein the composite coagulant is prepared from the following components in parts by mass: 20-25 parts of polyferric sulfate; 25 to 30 parts of concentrated sulfuric acid; 3-5 parts of aluminum sulfate; 2-5 parts of ferric trichloride; 3 to 5 parts of poly dimethyl diallyl ammonium chloride; the organic polymeric flocculant is a cationic polyacrylamide aqueous solution. By adopting the multi-component coagulant, the components and the synergistic effect of the components can be utilized. Colloids in the sewage lose stability by adding a composite coagulant, a particle condensation phenomenon is generated, tiny flocs are formed, then cationic polyacrylamide is added, the tiny flocs are combined into dense flocs, the treatment effect is improved, and various organic wastes in the sewage are effectively flocculated and removed.

The utility model discloses a crushing device for aluminum sulfate production. The crushing device comprises a crushing shell and a feeding mechanism, a feeding hopper is arranged at a feeding port in the upper end of the smashing shell, a fixed conical pipe is arranged on the inner arc face of the smashing shell, a discharging pipe is arranged at an opening in the lower end of the fixed conical pipe, a rotating column is rotationally connected to the middle of the discharging pipe, a conical pipe is arranged on the outer arc face of the rotating column, and smashing blades are arranged on the outer arc face of the conical pipe and the inner arc face of the fixed conical pipe. The distance between the outer arc surface of the conical pipe and the inner arc surface of the fixed conical pipe is gradually reduced from top to bottom; according to the crushing device for aluminum sulfate production, the feeding speed of aluminum sulfate is automatically controlled, so that the feeding speed of aluminum sulfate is in direct proportion to the rotating speed of the crushing component, blockage caused by excessive feeding of aluminum sulfate is avoided, and the crushing efficiency of the crushing device is improved.

The present application relates to the technical field of shotcrete, and specifically provides a mine-used shotcrete based on coal gangue and a preparation method thereof. Wherein, the shotcrete includes component A and component B in a weight ratio of 100: (3-9); wherein component A includes the following components in parts by weight: 100-140 parts of cement, 135-150 parts of coal gangue, 50-70 parts of water, 15-20 parts of admixture, 1-5 parts of calcium formate, 4-5 parts of water reducer, and 1-2 parts of air entraining agent; component B includes the following components in parts by weight: 4-10 parts of polyaluminium sulfate, 1-9 parts of triisopropanolamine, 1-4 parts of aluminium sulfate 18hydrate, 1-4 parts of ethylene glycol, 2-5 parts of nano-aluminium hydroxide, and 3-5 parts of triisopropanolamine octanoate. The shotcrete provided in the present application still has better mechanical properties while using coal gangue as aggregate.

The invention discloses a liquid polyaluminum ferric sulfate flocculant, a preparation process and application of the liquid polyaluminum ferric sulfate flocculant in wastewater treatment. The process comprises the following steps: (1) stirring and mixing gypsum and wastewater, adjusting the pH value, and carrying out filter pressing treatment; (2) stirring and mixing the filtrate and gypsum again, adjusting the pH value, and carrying out secondary filter pressing treatment; (3) carrying out oxidation treatment on the filtrate to prepare liquid polyaluminum ferric sulfate; and (4) adding a modifier into the liquid polyaluminum ferric sulfate for modification treatment to prepare the liquid polyaluminum ferric sulfate flocculant. The liquid polyaluminum ferric sulfate flocculant disclosed by the invention not only has higher economic value, but also realizes effective recovery and utilization of resources. In the production process, the process effectively reduces emission and reduces adverse effects on the environment. Meanwhile, the production cost is low, the production period is short, the comprehensive economic benefits of enterprises are remarkably improved, and positive contributions are made for promoting the development of circular economy.