2035 results about "Sodium sulfate" patented technology

According to the invention, biomass rice hull ash and a sodium hydroxide solution are reacted to obtain water glass and carbon mud. And reacting the water glass with CO2 generated by calcining the limestone to produce a white carbon black product and a mixed waste liquid of sodium carbonate and sodium bicarbonate. Meanwhile, quick lime obtained by calcining limestone is digested and then reacts with sodium carbonate and sodium bicarbonate mixed waste liquid to generate a light calcium carbonate product and dilute sodium hydroxide waste liquid. And finally, the dilute sodium hydroxide waste liquid is concentrated and reused for water glass production, so that the waste liquid is recycled, and a complete process closed loop is formed. According to the process method disclosed by the invention, two leading-edge innovative processes, namely production of white carbon black by renewable resource biomass rice hull ash and production of white carbon black by a carbonization method, are organically combined and are coupled with production of light calcium carbonate by a limestone calcination process, so that the problem that a large amount of sodium sulfate-containing wastewater is discharged in a traditional process is solved; meanwhile, the carbon footprint of white carbon black and calcium carbonate products is greatly reduced.

The invention provides a method and system for salt separation, evaporation and crystallization of printing and dyeing wastewater, and the method comprises the following steps: sequentially carrying out multi-stage synergistic pretreatment on textile printing and dyeing wastewater to remove suspended solids, degrade organic matters and reduce hardness; the pretreated wastewater is subjected to membrane salt separation treatment, and preliminary separation of salt is achieved through reverse osmosis pre-concentration and nanofiltration salt separation; and respectively carrying out evaporative crystallization treatment on the separated high-concentration salt solution to obtain high-purity sodium sulfate and sodium chloride products. According to the method, the salt recovery rate and the product purity are remarkably improved, the energy consumption and the operation cost are reduced, meanwhile, the problems that in traditional printing and dyeing wastewater treatment, salt is difficult to separate, and the crystallization purity is low are solved, and an innovative solution is provided for high-valued resource recovery of industrial wastewater.

The invention discloses high-toughness ultrathin flexible glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The ultrathin flexible glass is prepared from the following raw materials: silicon dioxide, aluminum oxide, lithium oxide, sodium oxide, magnesium oxide, a modified nano reinforced phase, a high-temperature melting regulator and cerium dioxide. The modified nano reinforced phase is prepared by the following steps: pre-treating silicon carbide and silicon nitride with hydrochloric acid, and mixing with nano zirconium oxide to obtain a mixture; and modifying the mixture with a silane coupling agent to obtain the modified nano reinforced phase. The high-temperature melting regulator is a mixture of lithium borate, sodium sulfate and lithium fluoride. The preparation method of the ultra-thin flexible glass comprises the following steps: preparing the modified nano reinforced phase, melting and homogenizing the glass, forming the glass substrate, and preparing the ultra-thin flexible glass. The ultra-thin flexible glass prepared by the invention has relatively high fracture toughness and structural rigidity, excellent flexibility and bending fatigue durability, and excellent thermal shock resistance.

The invention discloses a method for comprehensively recovering valuable elements from a waste lithium iron phosphate battery material. The method comprises the following steps: carrying out alkali leaching on black powder and / or pole piece materials of the waste lithium iron phosphate batteries, and then carrying out solid-liquid separation to obtain alkali leaching residues and an alkali leaching solution; carrying out acid leaching on the alkaline leaching residues, and then carrying out solid-liquid separation to obtain an iron oxide powder product and an acid leaching solution; the alkali leaching liquid is cooled and crystallized to obtain a sodium phosphate product and crystallization mother liquor, and the crystallization mother liquor can be circularly used for the alkali leaching process; adjusting the pH value of the acid leaching solution, precipitating and separating to obtain a lithium phosphate product and a lithium precipitation mother solution, wherein the lithium precipitation mother solution can be used for preparing a sodium sulfate product. The method can effectively separate iron, phosphorus and lithium products, and is high in recovery rate, simple, short in process, low in cost and suitable for industrial application.

The invention relates to the technical field of expansive soil treatment, and particularly discloses an expansive soil rapid hardening material as well as a preparation method and application thereof. The invention discloses an expansive type rapid hardening material for soil. The expansive type rapid hardening material is prepared from the following components: high belite sulphoaluminate cement clinker, ordinary Portland cement, gypsum, solid waste high-activity superfine powder, a nano crystal nucleus induction activating agent, a nano modified complexing agent and a modified early strength agent, the nano crystal nucleus induction activating agent is prepared from nano Al2O3, sodium dodecyl benzene sulfonate, NaOH and Na2SiO3; the nano modified complexing agent is prepared from nano SiO2, lauryl sodium sulfate and silane; the modified early strength agent is prepared from modified graphene oxide, Na2SiO3 and water. According to the technical scheme, the solid waste can be recycled, the expansive soil treated by the hardening material can achieve the effects of high hour strength and good water stability, and the curing speed and the production efficiency are greatly improved.

The invention discloses a printing and dyeing wastewater advanced treatment and salt control recycling process and system, and belongs to the technical field of wastewater treatment. According to the process, the printing and dyeing wastewater is sequentially subjected to pretreatment of grating interception, adjustment and homogenization, and coagulating sedimentation; carrying out hydrolytic acidification and biochemical treatment in a membrane bioreactor; softening treatment of ozone oxidation complex breaking and fluidization crystallization softening; carrying out nanofiltration separation to obtain a permeate and a concentrated solution; carrying out seed crystal fluidization descaling on the concentrated solution; respectively carrying out membrane concentration on the nanofiltration permeate and the descaled concentrated solution through reverse osmosis to obtain sodium chloride and sodium sulfate concentrated solutions; and finally, carrying out evaporation curing treatment on the sludge and the crystallized waste residues. Through multi-step cooperative treatment, deep purification of the printing and dyeing wastewater and efficient separation and recycling of salt are realized, and the problems of impure nanofiltration salt separation and high system scaling risk in the prior art are solved.

The invention provides a method for preparing sodium carbonate and co-producing ammonium sulfate from sodium sulfate waste salt, and relates to the technical field of chemical engineering. The method comprises the following steps: mixing sodium sulfate waste salt with water for dissolution, mixing the obtained sodium sulfate waste salt solution with an impurity removal agent for impurity removal, and mixing the obtained impurity removal solution with ammonium bicarbonate for double decomposition reaction to obtain a reaction feed liquid; carrying out primary cold separation on the reaction feed liquid to obtain first filtrate and primary sodium bicarbonate; sequentially washing, drying and roasting the primary sodium bicarbonate to obtain a sodium carbonate product; carrying out secondary cold separation on the first filtrate, carrying out solid-liquid separation to obtain a second filtrate and mixed salt, and reusing the mixed salt in the metathesis reaction; and mixing the second filtrate with an acid adjusting agent to adjust the acid, and carrying out evaporative crystallization on the obtained solution to obtain an ammonium sulfate product and an evaporation mother solution. Industrial-grade sodium carbonate and ammonium sulfate are co-produced by using sodium sulfate waste salt, sodium carbonate and ammonium sulfate meet national standard requirements, and the recovery rate of sodium sulfate is greater than or equal to 90%.

The invention provides a method for removing arsenic in water through sacrificial iron anode electrocoagulation, and belongs to the technical field of feed water treatment. According to the method for removing arsenic in water through sacrificial iron anode electrocoagulation, arsenic-containing underground water is electrolyzed through electrocoagulation treatment, an iron sheet serves as an anode in the electrocoagulation treatment, a sodium sulfate solution serves as electrolyte, and arsenic in water is removed after electrolysis is finished. The current of the electrocoagulation treatment is 5-10 mA, the treatment time is 8-15 min, and the concentration of the sodium sulfate solution is 5-20 mM. According to the invention, an electric coagulation technology is adopted, ferrous iron is generated by electrolysis of an iron anode to promote oxidation of arsenite and adsorption of arsenic on iron precipitates, so that the purpose of separating arsenic from water is achieved, and the method has the advantages of high treatment efficiency, environmental friendliness, flexibility, controllability and the like.

The invention relates to the technical field of cables, and provides a flexible corrosion-resistant robot cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer and an outer sheath layer from inside to outside, and is characterized in that the cable core sequentially comprises a conductor and an insulating layer from inside to outside; the outer sheath layer comprises the following raw material components in parts by weight: 60-70 parts of high-density polyethylene, 15-25 parts of an ethylene-tetrafluoroethylene copolymer, 0.5-1.5 parts of an antioxidant, 1-3 parts of a plasticizer, 8-12 parts of a flame retardant, 10-20 parts of polyethylene glycol diacrylate composite barium sulfate and 1-2 parts of a lubricant; the polyethylene glycol diacrylate composite barium sulfate is prepared from the following raw materials: polyethylene glycol diacrylate, barium chloride and sodium sulfate. According to the technical scheme, the problem of poor corrosion resistance of the robot cable in the prior art is solved.

The invention relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention discloses a quick-absorption type adult paper diaper and a preparation method thereof, and relates to the field of hygienic products, the quick-absorption type adult paper diaper comprises a surface layer, a flow guide layer, an absorption core layer and a leakage-proof bottom film which are arranged in sequence, the absorption core layer comprises an upper layer non-woven fabric, a first liquid absorption layer, deodorization fibers, a second liquid absorption layer and a lower layer non-woven fabric which are stacked in sequence, the first liquid absorption layer and the second liquid absorption layer are formed by mixing SAP and fluff pulp according to the mass ratio of (40-70): (30-60), and the SAP is prepared from the following raw materials in parts by weight: 100-120 parts of acrylic acid; 70-90 parts of a 30% sodium hydroxide solution; 4-8 parts of polyvinyl alcohol sodium sulfate; 10 to 14 parts of starch; 2-4 parts of an initiator; 0.5 to 1 part of a cross-linking agent; and 180 to 220 parts of deionized water. The liquid absorption performance and the deodorization and antibacterial performance of the absorption core layer of the adult paper diaper can be improved.

The invention discloses an HPVC power cable protection pipe and a preparation method thereof, and relates to the technical field of cable protection pipes. The HPVC power cable protection tube is at least prepared from the following raw materials in parts by weight: 100 parts of high-strength polyvinyl chloride, 35 to 45 parts of epoxy acrylate rubber, 5 to 8 parts of vinyl chloride-g-acrylate copolymer, 8 to 12 parts of epoxidized soybean oil, 3 to 5 parts of calcium-zinc composite stabilizer, 5 to 15 parts of modified hydrotalcite, 0.1 to 0.5 part of beta-diketone, 0.8 to 1.5 parts of calcium stearate and 10 to 20 parts of flame retardant. 12 to 15 parts of modified nano calcium carbonate, 5 to 8 parts of talcum powder, 0.6 to 1.2 parts of antioxidant, 1 to 2 parts of anti-aging agent 4010 and 0.5 to 1.5 parts of ultraviolet light absorber UV531; the modified hydrotalcite is obtained by adding a mixed solution of calcium nitrate and lanthanum nitrate, a sodium hydroxide solution and a sodium bicarbonate solution into a lauryl sodium sulfate solution, mixing and aging, and then carrying out a post-treatment process. The HPVC power cable protection tube prepared by the invention has relatively high strength, good mechanical properties, weather resistance and cold resistance, and long service life.

The invention discloses modified cement-water glass slurry and a preparation method thereof, and belongs to the technical field of building material preparation. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 50-70 parts of Portland cement, 20-35 parts of a water glass solution, silica fume, modified nano-silica, an early strength agent and the like, carrying out dry mixing on solid powder, stirring with part of deionized water to form base slurry, adding the water glass solution and the rest deionized water, and carrying out high-speed dispersion to obtain a slurry; and finally, carrying out ultrasonic treatment for 10-15 minutes at the frequency of 20-40 kHz and the power of 300-500 W. Wherein the early strength agent is compounded by triethanolamine and sodium sulfate according to the ratio of 1: 2-1: 3. According to the method, through raw material compounding and process optimization, the dispersity, the early strength and the crack resistance of the slurry are improved, and the method is mainly used for grouting operation in the field of construction engineering such as foundation reinforcement and water prevention and leakage stoppage.

The invention discloses a method for preparing a silicon-carbon composite negative electrode material through an electrostatic self-assembly technology, and belongs to the technical field of lithium ion battery negative electrode materials. According to the invention, lignin is used as a biomass carbon source and lauryl sodium sulfate (SDS) and poly (diallyldimethylammonium chloride) (PDDA) are used as activators through a simple electrostatic self-assembly technology; a proper amount of nano silicon and PDDA are subjected to in-situ adsorption, and lignin and SDS are subjected to in-situ adsorption; a self-assembly process is carried out through the positive and negative charge attraction effect among colloidal particles, so that effective compounding of the nano silicon particles and the biomass carbon is realized; and performing vacuum drying, and performing one-stage sintering in a tubular furnace to obtain the silicon-carbon composite negative electrode material. Based on the problems of non-uniform particle size, easy agglomeration and great abrasion of a silicon-carbon composite material in a traditional mechanical synthesis technology, the invention improves the compounding efficiency of the silicon-carbon material and improves the problems of volume expansion of a silicon negative electrode, slow migration rate of lithium ions, poor cycle performance and the like.

The invention provides high-performance silver powder suitable for TOPCon battery fine grid silver paste, a preparation method of the high-performance silver powder and the silver paste, and belongs to the technical field of photovoltaic materials. The preparation method comprises the steps that a silver salt solution and a composite reducing agent are mixed, a first-stage hydrothermal reaction is carried out at the first temperature, a second-stage hydrothermal reaction is carried out at the second temperature, and silver powder is obtained after centrifugation, washing and drying; wherein the composite reducing agent is selected from a mixture of two of potassium tartrate, sodium sulfite and ferrous sulfate. According to the method, gradual growth and crystallinity improvement of silver crystal nucleuses are achieved through two-stage heating, particle aggregation or uneven morphology caused by rapid reduction is avoided, in addition, the adopted composite reducing agent combination is remarkably superior to a single reducing agent (such as ascorbic acid), and the morphology and particle size distribution of the silver powder can be more accurately regulated and controlled.

The utility model relates to the technical field of metallurgical equipment, and discloses an environment-friendly kiln for lithium ore smelting, which comprises a kiln and a waste gas treatment mechanism, the side wall of the kiln is provided with a waste gas outlet, the inside of the kiln is provided with a feed port, and one side of the waste gas outlet far away from the kiln is provided with a heat exchange mechanism. A waste gas pipeline and a smoke outlet are arranged on the two sides of the waste gas treatment mechanism respectively, the heat exchange mechanism comprises a heat exchange cavity, a cold side outlet and a cold side inlet are formed in the two sides of the heat exchange cavity respectively, and a plurality of spoilers are installed in the side, close to the heat exchange mechanism, of the waste gas outlet. In the utility model, the spoiler is arranged in front of the heat exchanger to prolong the retention time of waste gas and improve the heat exchange efficiency. Meanwhile, an alkaline solution is sprayed to neutralize acidic components, generated solid byproducts such as sodium sulfate and calcium sulfate can be recycled for building materials or chemical engineering after being separated from liquid, and the production cost is reduced.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a pretreatment method for improving the leaching rate and the carbon adsorption rate of high-sulfur-arsenic gold ore. Comprising the following steps that the high-sulfur-arsenic gold ore is ground and then prepared into ore pulp; a green oxygen activating agent and hydrogen peroxide are sequentially added into the ore pulp, oxidation pretreatment is conducted on the high-sulfur-arsenic gold ore, ore pulp activating liquid is formed, and the green oxygen activating agent is a mixture of calcium oxide, sodium persulfate and soluble bivalent iron salt; and adding a gold leaching agent into the ore pulp activation solution, adjusting the pH value of the ore pulp to 9-12, carrying out stirring gold leaching treatment, filtering to obtain a leaching solution, and then adding activated carbon to adsorb and extract gold. According to the method, a stronger oxidation environment is provided, meanwhile, the residual concentration of arsenate radicals in the solution is effectively reduced, the leaching rate of gold and the adsorption rate of activated carbon are greatly increased, excellent oxidation performance and environment friendliness are shown, and a more sustainable high-sulfur-arsenic gold ore pretreatment process is provided.

The invention discloses a hollow fiber nanofiltration membrane based on interfacial polymerization regulation and a preparation method thereof. The method comprises the following steps: preparing a water phase system and an oil phase system, and sequentially injecting the water phase system and the oil phase system into a hollow fiber ultrafiltration membrane; performing interfacial polymerization reaction on the water phase system and the oil phase system on the surface of the hollow fiber ultrafiltration membrane; and drying to obtain the hollow fiber nanofiltration membrane. By adopting the method, the interception performance and flux of the nanofiltration membrane can be effectively adjusted, and the stability and applicability of the nanofiltration membrane are improved. The nanofiltration membrane is low in water contact angle and high in oil contact angle. Particularly, the surface porosity, the effective aperture, the sodium sulfate retention rate, the sodium chloride retention rate, the flux of sodium sulfate, the flux of sodium chloride and other properties of the nanofiltration membrane can be designed and accurately controlled according to requirements, and the properties of the nanofiltration membrane can be accurately designed and customized by adopting the method disclosed by the invention; the performance of the green and natural modified hollow fiber ultrafiltration membrane is realized, and an innovative solution is provided for high-salt resource recovery.

The invention discloses a sulfate-series sodium-ion battery positive electrode material with an expanded structure, a preparation method of the sulfate-series sodium-ion battery positive electrode material and a sodium-ion battery. The general formula of the sulfate-series sodium-ion battery positive electrode material is Na < 6-x > L < x > Fe < 5-y > M < y > (SO4) 8, wherein x is more than or equal to 0 and less than or equal to 0.5, y is more than 0 and less than or equal to 0.5, L is an alkali metal element with the same chemical valence as Na, and M is a transition metal element with the same chemical valence as Fe. According to the positive electrode material disclosed by the embodiment of the invention, the sodium ferric sulfate material with an expanded structure is taken as a main phase, and elements with variable radiuses are introduced into sodium sites and iron sites, so that the material further obtains a pore channel structure and defects with proper sizes, a three-dimensional diffusion channel of sodium ions is expanded, and the volume change in an electrochemical cycle process is inhibited; the structural stability of the material is ensured, so that the material shows relatively high gram volume and relatively good rate capability.

The invention discloses an electrolytic medium, an acidic oxygen evolution non-noble metal manganese-based catalyst, a process and application, and belongs to the field of water electrolysis hydrogen production. The preparation process comprises the following steps: (1) dissolving a metal salt of M, a metal salt of Mn, sodium sulfate, sulfuric acid and sodium acetate in deionized water to serve as an electrolyte; (2) carrying out electrodeposition reaction by using an electrochemical workstation and a three-electrode system at room temperature, and loading a manganese-based component on a conductive carrier; (3) cleaning the conductive carrier loaded with the manganese-based component in deionized water, and drying; calcining the loaded manganese-based component in the air at the temperature of 300-500 DEG C; the molar ratio of M to Mn is smaller than 1: 5, the metal manganese-based catalyst is metal element doped manganese oxide M-MnOx, and when the molar ratio is larger than or equal to 1: 5, the metal manganese-based catalyst is metal oxide coupled manganese oxide MOx / MnOx. According to the scheme, the problem that the activity and the stability of the existing MnO2 which is directly used as an excellent acidic oxygen evolution catalyst are insufficient is solved.

The invention belongs to the technical field of polyoxyethylene ether production, and particularly relates to a pyrrolidine compound polyoxyethylene ether composition and a preparation method thereof.The reaction speed is further increased and N-hydroxyethyl pyrrolidine is prevented from being oxidized and discolored by adopting a negative-pressure feeding mode in a reactor, so that the yield of N-hydroxyethyl pyrrolidine is increased, and the production cost is reduced. The pyrrolidine polyoxyethylene ether composition is prepared by mixing pyrrolidine polyoxyethylene ether with different polymerization numbers, pyrrolidine polyoxyethylene ether sodium sulfate and pyrrolidine polyoxyethylene ether sodium carboxylate according to a certain mass ratio, and the proportion of pyrrolidine polyoxyethylene ether with different lengths can be adjusted in the composition. The balance of hydrophilicity and hydrophobicity is changed, so that excellent hydrophobic-hydrophilic, dispersion and wettability properties are realized.

The invention belongs to the technical field of phase change energy storage materials, and particularly relates to thermally driven memory flexible phase change hydrogel and a preparation method thereof. Comprising the following steps: taking konjac glucomannan as a raw material, taking an inorganic phase-change material as a solvent, and enabling the inorganic phase-change material to enter a hydrogel network to obtain a hydrogel solution; sequentially adding acrylamide, a cross-linking agent and hydrothermal carbon into the hydrogel solution, and uniformly mixing to obtain a phase change hydrogel precursor; and adding an initiator into the phase change hydrogel precursor, and carrying out polymerization reaction to obtain the thermally driven memory flexible phase change hydrogel. The phase change hydrogel with shape memory behavior and high photo-thermal conversion capability is prepared, the problem of high-temperature leakage of sodium sulfate decahydrate can be effectively solved, the sodium sulfate decahydrate packaging efficiency is improved to 90.4 wt%, meanwhile, hydrothermal carbon forms a continuous and effective photo-thermal conversion and heat conduction path under the help of a three-dimensional network of the hydrogel, and the heat conduction efficiency of the sodium sulfate decahydrate is improved. The phase change hydrogel shows excellent photothermal conversion performance and heat conductivity coefficient.

The invention provides a preparation method and application of a silicon dioxide anti-blocking agent for a thin film, and relates to the technical field of anti-blocking agents. The preparation method of the silicon dioxide anti-blocking agent comprises the following steps: uniformly mixing and stirring tetraethoxysilane, ethanol, water and ammonia water, adding polyethylene glycol, stirring, carrying out water bath reaction, centrifuging, washing and calcining to obtain porous silicon dioxide microspheres; the preparation method comprises the following steps: dispersing porous silicon dioxide in absolute ethyl alcohol, adding a silane coupling agent, reacting, centrifuging, washing and drying to obtain silanized porous silicon dioxide microspheres; dispersing the silanized porous silicon dioxide microspheres in deionized water, adding a surfactant lauryl sodium sulfate and a methyl methacrylate and butyl acrylate monomer mixture, adding an initiator azodiisobutyronitrile for reaction, and centrifuging, washing and drying after the reaction is completed; and finally, carrying out heat treatment on the obtained product. The binding force between existing silicon dioxide anti-blocking agent particles and a film substrate is improved, and long-term effectiveness is maintained.

The invention relates to the technical field of mine filling materials, in particular to a composite filling cementing material and a preparation method thereof, and the composite filling cementing material comprises the following components: oil shale slag, ironmaking slag, clay mineral slag, Portland cement, a composite activator and a polycarboxylate superplasticizer. The composite activator comprises the following components: water glass, sodium carbonate, metakaolin, anhydrous sodium sulfate, calcium sulphoaluminate, dolomite, silica fume, potassium feldspar and an excitation accelerator. The gelling part is completely composed of various industrial wastes, the materials are convenient to obtain, the manufacturing cost is low, the composite exciting agent can effectively excite the potential activity of the oil shale residues, the ironmaking slag and the clay mineral residues and promote the hydration reaction of the oil shale residues, the ironmaking slag and the clay mineral residues, and the prepared composite filling gelling material has good moisture resistance and good durability.

The invention discloses a composite mineral admixture prepared from heat-stewed steel slag and a preparation method of the composite mineral admixture, and the mineral admixture is prepared from the following raw materials in parts by weight: 40-50 parts of heat-stewed steel slag powder, 20-30 parts of granulated blast furnace slag powder, 20-40 parts of fly ash, 0.01-0.1 part of a grinding aid and 0.5-4.0 parts of an exciting agent, wherein the grinding aid comprises glycerol and diethanol isopropanolamine, and the exciting agent comprises diphenyl phosphate, sodium sulfate and ammonium bicarbonate. The preparation method comprises the following steps: mixing calcium bicarbonate and water, spraying the mixture on high-temperature steel slag at 600-800 DEG C, carrying out hot braising under the condition of steam pressure of 0.2-0.5 MPa for 8-12 hours to pulverize the steel slag until the particle size is less than 5-10 mm, and carrying out vertical milling on the pulverized steel slag and a grinding aid for 20-40 minutes to obtain hot-braised steel slag powder; uniformly mixing the heat-stewed steel slag powder, granulated blast-furnace slag powder, fly ash, a grinding aid and an exciting agent in proportion to obtain mixed powder; and finally, grinding the mixed powder for 30-50 minutes by adopting a high-energy planetary ball mill to obtain the cement concrete composite mineral admixture with the specific surface area being greater than or equal to 600m < 2 > / kg. According to the invention, the potential hazard of poor stability of a cement concrete material caused by high f-MgO content in the steel slag is broken through, the steel slag is efficiently utilized to prepare a low-carbon green building material, a composite mineral admixture is developed, and the performance meets the II type requirement in JG / T 486-2015 Composite Admixture for Concrete.

The invention belongs to the technical field of chemical engineering and secondary resource utilization, and particularly discloses a collaborative utilization process of sodium sulfate and ammonium-containing waste salt. The high-value utilization method of sodium sulfate provided by the invention comprises the following steps: mixing sodium sulfate, organic ammonium salt and sulfuric acid, and adding water to prepare a mixed solution; extracting the mixed solution by using an extracting agent, and separating a water phase from an organic phase; adding a pH regulator into the water phase to regulate the pH to alkalescence, introducing carbon dioxide gas to fully react, cooling, crystallizing, and filtering to obtain filtrate and sodium bicarbonate precipitate; heating the filtrate for evaporative crystallization to obtain ammonium sulfate; and recovering the organic acid in the organic phase. The invention provides a subversive solution for sodium sulfate by-product accumulation and ammonium-containing wastewater treatment, has double values of resource circulation and carbon emission reduction, and has the advantages of full-flow closed-loop design, wide applicability, high product purity and high economical efficiency in process.

The present invention relates to a multifunctional safe water purification coagulant aid, its preparation process and application. The water purification coagulant aid includes components A, B, and C. Component A includes anionic PAM and a first multifunctional additive. Component B includes sodium sulfate, an acid-base regulator, a second multifunctional additive, and a stabilizer. Component C includes a low-molecular-weight flocculant, sodium silicate, sodium carbonate, and a dispersant. When using the water purification coagulant aid of the present invention, the technical product of the present invention is used in combination with a suitable coagulant represented by PAC for water treatment. Generally, the dosage of PAC can be reduced by 70-80%, the sedimentation time is shortened by about 70%, and the turbidity of the supernatant in the sedimentation tank can reach below 0.1 NTU after secondary purification by filtration. Moreover, the residual AM monomer in the dry powder of the technical product of the present invention is less than 12 ppm, and there is a major breakthrough in safety compared with similar water purification coagulant aids, having huge technical advantages, a wider application field, and important practical economic significance and far-reaching social significance.

The invention relates to the technical field of environmental protection, in particular to a resourceful treatment method for washing fly ash and application. The method provided by the invention overcomes the defects of low resource recovery rate and residual pollutants in the existing resourceful treatment of the washing fly ash. The method comprises the following steps: firstly mixing the fly ash with a chelating agent, then mixing with an acid washing solution, and carrying out primary washing to obtain a primary filter cake and a primary filtrate; performing second-stage washing on the first-stage filter cake by using deacidified wastewater to obtain a second-stage filter cake and second-stage filtrate; performing third-stage washing on the second-stage filter cake by using condensed water to obtain a third-stage filter cake and third-stage filtrate; the method comprises the following steps: firstly, carrying out pH regulation and flocculation treatment to generate a precipitate and a purified filtrate, and carrying out filtration, electrodialysis and evaporative crystallization on the purified filtrate to obtain sodium chloride and sodium sulfate; and mixing the third-stage filter cake with the precipitate, carrying out melting treatment, and cooling a vitrification product. The resourceful treatment method for the washing fly ash is high in resourceful efficiency and low in pollutant residue.

The invention relates to an anti-dandruff composition, a preparation method thereof and application of the anti-dandruff composition in shampoo products, and belongs to the technical field of washing care, and the anti-dandruff composition comprises the following raw materials: a plant bacteriostatic component, an oil control component, a moisturizing component, an emulsifier and a solvent. According to the application, the humulus lupulus flower extract, the phryma leptostachya extract and the inula flower heterocyst chrysanthemum extract are compounded to serve as plant bacteriostatic components, so that microbial florae causing the dandruff problem are effectively inhibited from growth and reproduction and killed, and the prepared composition has a prominent bacteriostatic effect; besides, the C10-15 alkanol polyether sodium sulfate, the capryloyl glycine, the potassium azelaic diglycinate and the coconut oil acyl hydrolyzed oat protein potassium are combined to be used as oil control components, and can be started from different aspects of removing dirt and grease, reducing grease secretion, inhibiting oil gloss and relieving scalp respectively, so that the prepared composition has an oil control effect. The raw materials selected under the design of the invention integrate antibacterial and oil control functions, and can also show a chip removal effect.

The invention belongs to the technical field of self-repairing materials, and particularly relates to a double-microcapsule self-repairing waterborne polyurethane material and a preparation method thereof. Comprising the following steps: ultrasonically dispersing cellulose nanocrystals in deionized water to form a water phase, adding drying oil and lauryl sodium sulfate, and stirring to obtain the drying oil microcapsule taking Pickering emulsion as a template. Preparing a polyvinylpyrrolidone aqueous solution, a non-polar solvent solution of thiophene monomers and an ammonium persulfate aqueous solution; and mixing and ultrasonically dispersing the two, mixing with an ammonium persulfate aqueous solution, stirring and polymerizing to obtain a polythiophene microcapsule suspension after the reaction is completed, centrifuging until the supernatant is colorless, and washing and drying the solid to obtain the polythiophene microcapsule. And finally, adding the two microcapsules into waterborne polyurethane, uniformly mixing, and drying at room temperature to form the double-microcapsule self-repairing waterborne polyurethane material. According to the invention, the self-repairing and mechanical property improvement of the double-microcapsule self-repairing waterborne polyurethane material under room-temperature natural light are realized.