17 results about "Calcium aluminosilicate" patented technology

The invention provides an anti-oxidation coating for an anode carbon block and a preparation method of the anti-oxidation coating, and belongs to the technical field of anode anti-oxidation coatings. Comprising an inner-layer coating and an outer-layer coating, the inner coating is prepared from the following components in parts by weight: 45 to 55 parts of aluminum oxide, 3 to 4 parts of silica sol, 4 to 5 parts of aluminum phosphate, 0.5 to 1.0 part of boron nitride nanosheet, 0.5 to 1.0 part of CeO2, 3 to 5 parts of TiB2 graphene and 1.2 to 1.5 parts of polyacrylic acid dispersing agent; the outer-layer coating comprises the following components in parts by weight: 10-15 parts of aluminum oxide, 6-9 parts of silicon carbide whiskers, 8-10 parts of aluminum calcium magnesium silicate glass powder, 1-2 parts of boron nitride nanosheets, 1-2 parts of Y2O3, 0.5-1.0 part of CeO2, 1.5-2.5 parts of aluminum phosphate and 2-3 parts of mullite fibers. The high-temperature stability and environmental protection property of the coating can be remarkably improved, meanwhile, the gradient structure design is introduced, conductivity and permeability resistance are both considered, and the pole changing period is prolonged.

The invention discloses waste brick micro powder based geopolymer concrete and a preparation device and method, and belongs to the technical field of building materials, the waste brick micro powder based geopolymer concrete comprises a crushing device, a grinding device, a conveying device, a stirring device and a forming device; the crushing device is used for crushing waste bricks to form waste brick fragments, the grinding device is used for grinding the waste brick fragments to form waste brick micro powder, and the two ends of the conveying device correspond to the discharging end of the crushing device and the feeding end of the grinding device correspondingly and are used for conveying the waste brick fragments. According to the invention, the waste brick micro powder is used as a mixed material or admixture for replacing cement and reacts with water to generate hydrated calcium silicate gel and calcium hydroxide; the hydrated calcium silicate gel can bond the aggregate to form a compact structure with certain mechanical strength, and the calcium hydroxide can react with amorphous SiO2 and Al2O3 in the waste brick micro powder to generate hydrated calcium silicate, hydrated calcium aluminate or hydrated calcium aluminosilicate; a series of problems caused by nowhere to stack a large amount of waste concrete are effectively solved.

The invention discloses a method for comprehensively utilizing vanadium and chromium resources, which comprises the following steps: mixing chromium hydroxide with sodium hydroxide, and introducing oxygen for liquid-phase oxidation to obtain an oxidation solution; adding calcium oxide into the oxidation liquid, stirring and mixing, and performing solid-liquid separation after reaction to obtain calcium vanadate solid and vanadium-free alkali liquid; adding a decalcifying agent into the vanadium-free alkali liquor, and carrying out solid-liquid separation to obtain calcium carbonate and refined sodium chromate alkali liquor; reacting calcium vanadate with roasting slurry containing aluminum, silicon and carbonate to form calcium aluminosilicate precipitate and desiliconized high-vanadium alkali liquor; continuously neutralizing the desiliconized high-vanadium alkali liquor and the carbonization solution to obtain an aluminum-vanadium high-valued product and a neutral solution; the neutral liquid is carbonized, and obtained sodium bicarbonate and carbonized liquid can be returned to a system for recycling. The method for comprehensively utilizing the vanadium and chromium resources has the advantages of being simple in process, environmentally friendly, efficient, easy to control in operation, easy to obtain raw materials, low in production cost and the like.

The invention relates to a method for binding sulfates in a body of water comprising sulfates, a calcined mixture prepared by calcining a mixture comprising calcium oxide and calcium alumina and / or calcium aluminate and cooling it to bind sulfates in a body of water, and the use of at least one element comprising CaO and mayenite supergroup and / or of a powder mixture and / or calcined mixture comprising at least one calcium aluminosilicate and / or at least one calcium aluminosilicate and / or calcium silicate for binding sulfates in a body of water.

An artificial culture medium for mushroom cultivation, which contains amorphous calcium aluminosilicate that contains CaO in an amount of 30 to 60% by mass, Al2O3 in an amount of 10 to 60% by mass, SiO2 in an amount of 5 to 40% by mass, and P2O5 in an amount of 100 to 5,000 ppm by mass.

The application provides a method for efficiently removing beryllium and thallium in lithium residue, comprising the following steps: S1, providing lithium residue; the lithium residue contains beryllium and thallium, and the lithium residue has calcium aluminosilicate; S2, performing hydrothermal treatment on the lithium residue and an acid solution to obtain a reaction liquid; the acid solution comprises one or more of sulfuric acid solution, hydrochloric acid solution, nitric acid solution and phosphoric acid solution; the concentration of the acid solution is not less than 1 mol / L; the temperature of the hydrothermal treatment is not less than 100 DEG C, and the time of the hydrothermal treatment is not less than 2 h; and S3, performing solid-liquid separation on the reaction liquid to obtain a beryllium and thallium separation liquid and a detoxification residue. The application has excellent removal effect on beryllium and thallium in lithium residue, and can realize low-cost detoxification and reuse of the lithium residue.

The invention discloses an incineration fly ash curing material based on multi-element solid waste and a preparation method of the incineration fly ash curing material, and belongs to the field of solid waste treatment and ecological environment materials. The method comprises the following steps: S1, uniformly mixing incineration fly ash, red mud, soluble sodium salt and water to obtain a mixture; s2, stirring the mixture obtained in the step S1 for 3-10 hours, and drying to obtain a dry material; s3, calcining the dry material obtained in the step S2, and grinding after calcining to obtain powder; and S4, uniformly mixing the powder obtained in the step S3 with red mud, alkaline residues and water glass to obtain the incineration fly ash curing material. The main raw materials of the red mud, the incineration fly ash and the alkaline residues are all solid wastes, so that the co-treatment of treating wastes with wastes is realized, and the social and environmental benefits are remarkable. According to the method, through reasonable proportioning, directional regulation and control and design are carried out on a hydration product, generation of a gel phase of calcined layered double hydroxides and calcium aluminosilicate is induced, and in-situ curing of heavy metal and chloride ions in the incineration fly ash is achieved.

The present invention relates to a multi-element oxide high-temperature resistant aerogel composite material and a preparation method thereof. The method comprises: using water to uniformly disperse an aluminum source and a magnesium source to obtain a dispersion, then adding a structure modifier and a mineralizer to the dispersion and performing a hydrothermal reaction to obtain a composite precursor sol; the aluminum source is aluminum oxide nanowires and / or aluminum oxide nanobelts; the magnesium source is magnesium oxide nanopowder; mullite nanofibers, silicon carbide nanopowder, and an inorganic gelling agent are added to the composite precursor sol and mixed uniformly, and after the system is gelled, it is aged to obtain a wet gel; the inorganic gelling agent is calcium aluminosilicate cement and / or calcium ion-doped zirconium oxide sol; the wet gel is sequentially subjected to solvent replacement and supercritical drying to obtain a multi-element oxide high-temperature resistant aerogel composite material. The present invention improves the temperature resistance of the material, effectively controls the particle size and structure of the material, and can effectively improve the mechanical and thermal properties and high-temperature sintering performance of the aerogel thermal insulation material.

The invention discloses a preparation method of a cementing material system based on calcium carboaluminate and hydrated calcium aluminosilicate, and belongs to the field of building materials. The method comprises the following steps: heating refractory clay to 500 DEG C within 30 minutes, heating to 750 DEG C at a heating rate of 2 DEG C / min, and keeping the temperature for 3 hours, so that a kaolin crystal structure is destroyed, and amorphous metakaolin with interlayer pore channels is formed; grinding the fly ash in a ball mill; mixing the light-burned refractory clay with quick lime, and grinding; limestone with the CaO content higher than 50% is ground till the specific surface area ranges from 600 m < 2 > / kg to 650 m < 2 > / kg; grinding the cement clinker and the desulfurized gypsum until the specific surface area is 350-400m < 2 > / kg; and mixing the superfine fly ash, the light-burned refractory clay, the quick lime, the limestone powder, the cement clinker and the desulfurized gypsum to generate the cementing material system based on the calcium carboaluminate and the hydrated calcium aluminosilicate. By using the cementing material system, the content of the clinker in the cement is greatly reduced, and the use amount of the cement clinker is only 1 / 3 of that of ordinary cement.

The invention relates to the technical field of concrete, and particularly discloses tunnel lining concrete and a preparation method thereof. The tunnel lining concrete is prepared from the following raw materials in parts by mass: 320 to 380 parts of Portland cement, 60 to 100 parts of fly ash, 40 to 80 parts of superfine slag powder, 950 to 1100 parts of coarse aggregate, 750 to 850 parts of fine aggregate, 30 to 55 parts of expanding agent, 0.8 to 1.2 parts of polypropylene short fiber, 4.5 to 6.5 parts of polycarboxylate superplasticizer and 150 to 170 parts of water, the expanding agent is prepared from calcium aluminosilicate clinker, sodium fluoroaluminate and water through double decomposition reaction. The expanding agent is prepared from the calcium aluminosilicate clinker, sodium fluoroaluminate and water through a double decomposition reaction, the main product of the expanding agent is calcium aluminofluorosilicate expanding crystals, meanwhile, generated sodium hydroxide and aluminum hydroxide serve as beneficial by-products, concrete shrinkage can be compensated in a staged mode, the pore structure can be optimized, and the crack resistance, impermeability and durability of concrete can be synergistically improved; the compatibility with all the raw materials is good, and the problem that the tunnel lining concrete is poor in anti-cracking and anti-permeability synergism can be solved.

This invention provides a hydrothermal-synthesized, long-term, anti-degradation, low-density cementing material for ultra-high temperature environments and its preparation method. This cementing material incorporates calcium oxide, silicon oxide, and various calcium aluminates into its formulation. The hydration reaction of these raw materials at high temperatures generates a substance with a certain strength. Simultaneously, under high-temperature conditions, the three types of calcium aluminates in a specific ratio can react with calcium oxide and silicon oxide to form hydrated calcium aluminosilicate (C-A-S-H), which exhibits long-term high-temperature resistance, thus ensuring the long-term high-temperature performance of the cementing material. Through this method, a cementing material that does not experience strength degradation under long-term high-temperature conditions (90 days of curing at 240℃) is obtained, effectively solving the problem of strength degradation at high temperatures in existing cement slurries used in deep wells.

The invention provides an internal curing agent, a high-strength low-shrinkage alkali-activated composite material prepared from the internal curing agent and a method, and belongs to the technical field of shrinkage control of alkali-activated cementing materials. According to the invention, acrylamide and acrylic copolymer (NIPAm-SA) is adopted as a template skeleton, a calcium aluminosilicate hydrate crystal nucleus (C-A-S-H) is modified through a coordinate bond self-assembly reaction, the three-dimensional network calcium aluminosilicate hydrate (C-A-S-H-coated NIPAm-SA) is synthesized, and the C-A-S-H-coated NIPAm-SA can be used as an internal curing agent. The C-A-S-H-coated NIPAm is mixed with an alkali-activated cementing material, and the prepared high-strength low-shrinkage alkali-activated composite material has the advantages of high internal curing efficiency, remarkable self-shrinkage inhibition effect, high early strength and the like. According to the invention, the synergistic effect of hydrated calcium aluminosilicate for internal curing and nucleation sites is realized, and more importantly, the hydrated calcium aluminosilicate can be suitable for a high-alkalinity environment of an alkali-activated cementing material and can be well combined with a matrix, so that the problem of large self-constriction of the alkali-activated cementing material is relieved.

The invention discloses a treatment method of aquaculture wastewater, which comprises the following steps: under an alkaline condition, introducing aluminum and magnesium elements into lime to form a calcium hydroxide composite system, and pre-aggregating dispersed calcium hydroxide composite system particles into a porous floc by using cationic polyacrylamide in the calcium hydroxide composite system to form improved lime; the method comprises the following steps: performing primary solid-liquid separation and water quality regulation on breeding wastewater, adding improved lime, and uniformly stirring; according to the breeding wastewater treatment method provided by the invention, the improved lime is used for replacing common lime, and the improved lime has a lime composite system with stronger adsorption and flocculation capabilities, has a larger specific surface area, increases the density of active sites, is beneficial to adsorbing positively charged suspended matters by utilizing static electricity, improves the flocculation capability, and improves the adsorption efficiency. PAM is beneficial to adsorption and flocculation of negatively charged suspended solids, calcium aluminosilicate double salt has strong ion exchange capacity, and silicate generated after improved lime is dissolved in water can coat floc, so that the adsorption capacity and flocculation strength of the composite system are improved.

This invention discloses a self-compacting expansive concrete and its preparation method, comprising the following raw materials in parts by weight: cement: 420-480 parts; fly ash: 50-70 parts; fine aggregate: 720-800 parts; coarse aggregate: 950-1050 parts; water: 120-200 parts; water-reducing agent: 8-16 parts; expansive agent: 32-40 parts; wherein the expansive agent comprises two or more of calcium aluminosilicate, calcium sulfoaluminate, and magnesium oxide. This application has the effect of improving the fluidity of concrete.

The invention provides a method for efficiently removing beryllium and thallium in lithium slag. The method comprises the steps that S1, the lithium slag is provided; the lithium slag contains a beryllium element and a thallium element, and the lithium slag contains calcium aluminosilicate; s2, the lithium slag and an acid solution are jointly subjected to hydrothermal treatment, and a reaction solution is obtained; the acid solution comprises one or more of a sulfuric acid solution, a hydrochloric acid solution, a nitric acid solution and a phosphoric acid solution; the concentration of the acid solution is not less than 1mol / L; the temperature of the hydro-thermal treatment is not lower than 100 DEG C, and the duration of the hydro-thermal treatment is not less than 2 hours; and S3, carrying out solid-liquid separation on the reaction liquid to obtain beryllium thallium separation liquid and detoxified slag. The method has an excellent removal effect on beryllium and thallium elements in the lithium slag, and low-cost detoxification and reutilization of the lithium slag can be realized.

A concrete and a method for preparing the same are provided. The concrete includes 11 wt % to 20 wt % of sodium, 3 wt % to 6 wt % of magnesium, 7 wt % to 11 wt % of aluminum, 15 wt % to 22 wt % of silicon, 0.4 wt % to 0.7 wt % of potassium, and 49 wt % to 53 wt % of calcium, based on the total weight of sodium, magnesium, aluminum, silicon, potassium, and calcium in the concrete. Additionally, the concrete includes a calcium aluminosilicate compound.

The invention relates to the technical field of building material manufacturing, in particular to fiber foam light soil prepared from municipal solid waste incineration bottom ash and a method of the fiber foam light soil. The fiber foam light soil is prepared from the following substances: cement, municipal solid waste incineration bottom ash, raw material soil, a fiber admixture, a water reducing agent, an alkaline reagent and water. The solid waste-municipal solid waste incineration bottom ash is adopted as the foaming agent to replace a traditional organic foaming agent, on one hand, the cost of the foaming agent is reduced, and on the other hand, the treatment problem of municipal solid waste incineration bottom ash solid waste is effectively solved. Meanwhile, the light soil is solidified by hydrated calcium aluminosilicate gel generated through alkali excitation by adopting the municipal waste incineration bottom ash, so that the cement can be greatly replaced, the carbon emission is reduced, and the strength performance is improved.