1326 results about "Calcium silicate" patented technology

The invention discloses a yellow phosphorus tailing-based mine filling material and application thereof. The yellow phosphorus tailing-based mine filling material comprises aggregate and a cementing material, the cementing material comprises the following components in parts by mass: 5-20 parts of red mud, 20-40 parts of yellow phosphorus slag, 10-30 parts of slag, 5-10 parts of fly ash, 5-10 parts of a compound exciting agent, 1-3 parts of an early strength agent and 2-5 parts of a water-retaining agent; wherein the compound exciting agent comprises the following components in parts by mass: 10-20 parts of sodium metasilicate, 30-40 parts of gypsum powder, 20-30 parts of sodium sulfate, 5-10 parts of carbide slag and 5-10 parts of silica fume; according to the invention, the raw materials are compounded and the specific exciting agent is subjected to depolymerization-polycondensation reaction to obtain a cementing material containing Aft (ettringite), C-S-H gel (hydrated calcium silicate gel) and C-A-S-H gel (hydrated calcium aluminosilicate gel), and finally, the mine filling material with high fluidity, low bleeding rate and high strength is obtained while yellow phosphorus tailing solid waste is treated.

The invention discloses a preparation process of a fireproof lightweight thermal-insulation cement-based mortar material, which comprises the following steps: (1) placing porous lightweight aggregate in a sodium silicate solution for standing, and drying the obtained aggregate to obtain pretreated thermal-insulation aggregate; (2) uniformly mixing silica fume, calcium silicate powder, calcium hydroxide powder and water to form slurry; mixing the pretreated thermal insulation aggregate with the slurry, separating, airing the aggregate, and curing to obtain the primary thermal insulation aggregate. And (3) spraying water on the primary thermal insulation aggregate for wetting, then spraying ethanol containing a silane coupling agent, and airing to obtain the modified thermal insulation aggregate. And (4) uniformly mixing Portland cement, the modified thermal insulation aggregate, basalt fiber and a water reducing agent as raw materials, adding water, and uniformly stirring to obtain the mortar material. According to the invention, the water absorption rate of the porous lightweight aggregate is reduced, so that the adverse effect of the high water absorption characteristic of the aggregate on the mechanical properties of the mortar material is effectively reduced.

The invention relates to the field of agricultural microbial preparations, in particular to a complex microbial inoculant sustained-release granule for preventing and treating sweet potato stem nematode disease and a preparation method of the complex microbial inoculant sustained-release granule. Comprising the following components in parts by weight: 15-25 parts of paecilomyces lilacinus viable bacterium powder, 10-20 parts of bacillus thuringiensis viable bacterium powder, 10-20 parts of streptomyces viable bacterium powder, 5-15 parts of bacillus subtilis viable bacterium powder, 15-25 parts of charcoal, 5-15 parts of sodium alginate, 5-15 parts of humic acid, 5-10 parts of chitosan, 3-8 parts of calcium silicate, 1-5 parts of mannitol and 1-5 parts of sodium lignin sulfonate. Four microorganisms with complementary functions, namely paecilomyces lilacinus, bacillus thuringiensis, streptomycete and bacillus subtilis, are adopted, the sweet potato stem nematode disease is synergistically controlled through multiple action mechanisms, and the control effect and the stability are remarkably improved.

The invention discloses a solid waste-based cementitious material, which comprises the following raw materials based on 100% of the total mass percentage: 10% to 35% of pretreated pyrite tailing powder, 30% to 50% of granulated blast furnace slag powder, 15% to 30% of steel slag powder, and the remainder being gypsum powder. The invention heats the pyrite tailing at 300°C and ultrafinely grinds the pyrite tailing to cause an oxidation reaction of pyrite and pyrrhotite contained therein to generate sulfate minerals, thereby reducing the proportion of sulfide compounds in the tailing and reducing the risk of expansion and cracking of a hardened body of the solid waste-based cementitious material in the later stage. Moreover, the sulfate generated by oxidation and the gypsum contained in the pyrite tailing react with the steel slag and slag in the solid waste-based cementitious material to generate hydrated calcium silicate gel and calcium sulfonite, thereby improving the strength of the solid waste-based cementitious material.

The invention relates to a building material, and particularly discloses a high-ductility cement-based composite material and a preparation method thereof.The cement-based composite material is prepared from, by weight, cement, water, an additive, PE fibers, modified PVA fibers, sand, hollow glass beads, silica fume, calcium silicate and expanded perlite; wherein the modified PVA fiber is prepared by compounding and modifying polyimide aerogel with acrylate resin and epoxy resin; the preparation method comprises the following steps: mixing the cement, the silica fume, the sand, the calcium silicate and the expanded perlite, and then adding the PE fibers to prepare a dry-mixed mixture; and mixing an additive with water to obtain a mixture, then adding the modified PVA fibers, uniformly stirring, then adding the dry-stirred mixture, and uniformly stirring to obtain the high-ductility cement-based composite material. According to the present invention, the fly ash is not added, such that the product quality stability is ensured, the good mechanical property and the good ductility are provided, and the energy saving and thermal insulation functions are provided.

The invention discloses a high-ground-temperature-resistant ultrahigh-flow nano-modified polymer grouting material as well as a preparation method and application of the high-ground-temperature-resistant ultrahigh-flow nano-modified polymer grouting material, and belongs to the technical field of geotechnical engineering. According to the present invention, the nanometer modified cementation particles are combined with the calcium hydroxide, the sodium carbonate, the cellulose nanofiber and the tannic acid to regulate and control the hydration process, the fluidity and the mechanical strength, the nanometer modified cementation particles are injected into the deep surrounding rock, the high fluidity can be maintained in the high ground temperature environment for a long time, the grouting diffusion range is effectively expanded, and the accurate regulation and control of the grouting material gelling time can be achieved. Meanwhile, high-mass-fraction fly ash and silica fume are excited to generate calcium aluminosilicate hydration products, and the problems that an existing conventional calcium silicate grouting cementing material is poor in reinforcing and anti-seepage effect in a high-ground-temperature environment, slurry is prone to cracking and the like are solved.

The invention discloses a production method for preparing a potassium humate fertilizer through continuous high-pressure hydrothermal reaction of potassium feldspar, and relates to a wet grinding pulping process, a hydrothermal reaction process, a flash evaporation filter pressing process, a humic acid modified potassium fertilizer preparation process and a causticization and humic acid modified silicon-calcium fertilizer preparation process. The preparation method comprises the following steps: firstly, carrying out high-pressure tubular hydrothermal reaction and tower-type delayed reaction on potassium feldspar alkaline ore pulp prepared by fine grinding to prepare potassium aluminosilicate and calcium silicate, mixing alkaline potassium aluminosilicate filter residues obtained by filtering with humic acid, modifying, granulating and drying to obtain a humic acid coated long-acting slow-release potassium fertilizer product. The alkaline calcium silicate filtrate and lime are subjected to a causticization reaction to obtain a KOH solution, the KOH solution is returned to a wet pulping process to be recycled, and the alkaline calcium silicate and the humic acid are mixed, modified, granulated and dried to produce the humic acid coated long-acting slow-release silicon-calcium fertilizer product.

The invention discloses a composite gas hole sealing material and a preparation method thereof. The composite gas hole sealing material is prepared from the following raw materials in parts by weight: 35-50 parts of Portland cement, 50-65 parts of a solid waste-based cementing material, 1-5 parts of an active exciting agent, 1-5 parts of an early strength agent, 3-5 parts of a microcapsule expanding agent, 0.2-0.4 part of a water reducing agent and 1-3 parts of an accelerator. According to the composite gas hole sealing material disclosed by the invention, the dissolution and hydration of the solid waste-based cementing material are accelerated through the active exciting agent, and the generation of a hydration product is promoted through early-strength excitation including the synergistic effect of alkylol amine and nano-spray calcium silicate, so that the early strength of the composite gas hole sealing material is greatly improved; expansion components released after the composite gas hole sealing material is extruded and fractured by a drilled hole react with hydration products to generate ettringite to compensate shrinkage and improve the sealing performance, and the performance of the composite gas hole sealing material is further optimized under the assistance of a proper amount of a water reducing agent and a proper amount of an accelerator. The composite gas hole sealing material is simple in preparation process and low in production cost.

The invention discloses an early-strength high-fluidity cement-based grouting material and a preparation method thereof, and belongs to the technical field of grouting materials. The grouting material is prepared from the following raw materials in percentage by mass: 40-50% of cement, 3-5% of an early strength agent, 0.5-1.5% of a water reducing agent, 3-20% of a mineral admixture, 0.2-1% of a defoaming agent and 35-50% of aggregate, the early strength agent is a composition of a ground nano seed crystal early strength agent based on hydrated calcium silicate and lithium sulfate, and the water reducing agent is an asparaginic acid ester modified polycarboxylic acid water reducing agent. According to the invention, high fluidity and high stability of the cement-based grouting material are realized, the problem of insufficient early strength of the traditional grouting material is solved, and sufficient grouting in a complex and narrow construction environment can be met.

The invention belongs to the technical field of mine filling materials, and discloses a solid-waste-based mine filling material and a preparation method thereof. The filling material comprises 70-100 parts of red mud, 1-10 parts of fly ash, 1-10 parts of slag, 5-20 parts of an acid activator, 10-30 parts of aggregate, 1-5 parts of a water reducing agent and 50-100 parts of water. The doping amount of the red mud of the filling material can reach 60% or above, the red mud is used as a main cementing material, formic acid, acetic acid, oxalic acid and other small-molecular organic acids are used as an acid activator, and an acid environment provided by the acid activator can reduce the alkalinity of the red mud and promote the dissolution of the red mud; the water and calcium silicate in the red mud can be more easily subjected to hydration reaction to generate a large amount of hydration products such as C-S-H gel, so that the strength of the filling material is enhanced. The acid activator used in the invention is low in cost, the cementing material and the aggregate are industrial solid wastes, and the cost of the mine filling material is reduced while the problem of resource utilization of the industrial solid wastes is solved.

The invention belongs to the technical field of grouting materials, and particularly relates to a graphene modified ternary composite ultrafast curing grouting material and a preparation method thereof. The technical scheme is as follows: the graphene modified ternary composite ultrafast curing grouting material comprises the following components: a main agent and a curing agent in a weight ratio of 4: 1, wherein the main agent is prepared from the following components in parts by weight: 30 to 33 parts of modified nano calcium silicate, 0.8 to 0.9 part of functionalized graphene, 3.8 to 4.2 parts of intelligent response type expansion factors, 2.5 to 3.0 parts of nanoscale molecular sieves and 18 to 20 parts of surface modified composite mineral admixtures; the main agent is prepared by adopting a special dispersion medium; the curing agent is prepared from the following components in parts by weight: 1.5 to 1.8 parts of amino-functionalized carbon nanotubes, 9 to 10 parts of an active site initiator, 4.5 to 5.0 parts of an interface coupling agent composite system and 2.5 to 2.8 parts of an intelligent regulation and control aid; the curing agent is prepared by a special carrier. The invention provides a graphene modified ternary composite ultrafast curing grouting material and a preparation method thereof.

The invention provides a synthetic method of methyl p-tert-butylbenzoate, and belongs to the technical field of chemical synthesis, the synthetic method comprises the following steps: mixing sulfonic acid resin in a molten state with calcium salt of nano powder, then rapidly solidifying to prepare mixed particles, and then sequentially carrying out pickling activation, cleaning and drying to prepare a modified sulfonic acid resin catalyst; the calcium salt is at least one of calcium sulfate and calcium silicate; the method comprises the following steps: adding p-tert-butylbenzoic acid and absolute methanol into reaction equipment, carrying out a step-by-step esterification reaction of heating and cooling at 90-150 DEG C under the catalysis of a modified sulfonic acid resin catalyst, and carrying out post-treatment after the reaction is finished, so as to obtain methyl p-tert-butylbenzoate, wherein the molar ratio of p-tert-butylbenzoic acid to absolute methanol is (1: 3)-(1: 5). According to the method, the modified sulfonic acid resin is used as the catalyst, and the stepped esterification reaction of heating and cooling is combined, so that the methyl p-tert-butylbenzoate with the purity being greater than or equal to 99.99% is prepared, and the conversion rate of p-tert-butylbenzoic acid exceeds 99%.

The invention belongs to the technical field of ETFE film preparation, and particularly relates to a preparation method of a high-strength ETFE film. The preparation method of the ETFE film comprises the following steps: preparing a mixture of modified nano cellulose and calcium magnesium silicate whiskers; carrying out modification treatment on the poly (p-benzamide) fiber; and preparing the ETFE film. According to the preparation method of the high-strength ETFE film, the perfluoroalkoxy copolymer and the ETFE resin are selected and mixed for use, during melt extrusion, the perfluoroalkoxy copolymer can lubricate the ETFE and reduce the overall melt viscosity, the critical shear rate of the perfluoroalkoxy copolymer is higher than that of the ETFE, melt fracture can be inhibited, the film is evenly extruded, the flatness of the film surface is improved, and the high-strength ETFE film is prepared. And meanwhile, the elastic retraction of the ETFE is inhibited during high-temperature setting. And the modified nano cellulose and calcium magnesium silicate whisker mixture and the modified poly-p-benzamide fiber are added to enhance the mechanical strength of the prepared ETFE film.

The invention provides a method for deeply extracting vanadium from vanadium-containing steel slag, which comprises the following steps: mixing the vanadium-containing steel slag and an oxygen-containing microbubble ammonium bicarbonate solution, and carrying out mechanochemical ball milling activation to carry out leaching reaction to obtain a vanadium extracting solution. According to the method, advanced oxidation is cooperated with mechanochemical ball milling to activate and strengthen deep extraction of vanadium in the vanadium-containing steel slag, wrapping of substances such as calcium silicate and calcium titanium oxide on a vanadium-containing solid solution phase is destroyed through mechanical activation, and O2 microbubbles in an ammonium bicarbonate medium are promoted to generate active oxygen under excitation of mechanical activation energy; exposure reaction and deep oxidation extraction of a vanadium-containing phase under mild conditions are achieved, the content of V2O5 in tailings after vanadium extraction is smaller than or equal to 0.5%, and the vanadium extraction rate is 83% or above.

The invention provides a preparation method and application of a nano calcium silicate nucleating agent, and relates to the technical field of nano material preparation, the preparation method comprises the following steps: conveying a calcium salt solution, a silicate solution and a dispersant solution into a microfluidic reactor for reaction to obtain the nano calcium silicate nucleating agent; wherein the retention time of the reaction in a microchannel of the microfluidic reactor is 1 to 10 minutes; and the inner diameter of the microchannel is 20-500 [mu] m. The invention solves the technical problems of slow mass and heat transfer, long reaction time and need of exploration and amplification of the process in the traditional kettle type or magnetic stirring process for preparing nano calcium silicate, and achieves the technical effects of fast mass and heat transfer, high production efficiency, easy industrialization amplification and shortening of the industrialization research and development period. The obtained nano calcium silicate nucleating agent is beneficial to improving the early strength performance of cement, and has no influence on the later strength of the cement.

The invention relates to the technical field of building materials, and particularly discloses a bridge expansion joint cement-based repairing mortar material and a preparation process thereof. The invention discloses a cement-based repair mortar material for bridge expansion joints. The cement-based repair mortar material is prepared from the following raw materials in parts by weight: 20-30 parts of Portland cement, 1-5 parts of benzoxazine resin, 30-40 parts of sandstone, 0.5-2 parts of nano silicon dioxide, 0.5-2 parts of a water reducing agent, 1-3 parts of hydrated calcium silicate, 15-25 parts of water and 10-15 parts of modified polyurethane, the preparation method comprises the following steps: dispersing the nano silicon dioxide in water, carrying out ultrasonic treatment, uniformly stirring to form a stable suspension, respectively adding the hydrated calcium silicate and the modified polyurethane, uniformly stirring, sequentially adding the Portland cement, the benzoxazine resin and the gravel, and stirring and mixing until the slurry is uniform to obtain the repair mortar material. The composition can be used for repairing bridge expansion joints, and has the advantages of good durability, high compressive strength and the like.

The invention discloses a novel sewage softening and silicon removal synchronous method and system. The method comprises the following steps: detecting the concentration of calcium ions and the concentration of silicon dioxide in wastewater; adjusting the pH value of the wastewater; adjusting the temperature of the wastewater; adding a sodium hydroxide agent into the wastewater and stirring; and carrying out solid-liquid separation to obtain treated wastewater. According to the method, a chemical precipitation method is adopted, a sodium hydroxide agent is added into the high-calcium and high-silicon-dioxide wastewater, and a calcium silicate precipitate is generated through a chemical reaction, so that the aim of removing calcium ions and silicon dioxide is synchronously achieved, and the dual effects of sewage softening and silicon removal are achieved.

A carbon fixation material for adsorbing heavy metals in soil and a preparation method thereof are provided. The carbon fixation material includes modified biochar, calcium silicate, aluminum sulfate, hydroxymethyl cellulose and urea. The modified biochar is prepared by preparing biochar from agricultural and forestry waste, and modifying the biochar with ferric chloride and a mercapto silane coupling agent. The carbon fixation material has excellent carbon fixation capacity, the biochar is prepared by processing agricultural and forestry waste, the material source is green and environmentally friendly, can reduce environmental pollution. After modified by ferric chloride and mercapto silane coupling agent, the biochar has excellent adsorption amount and adsorption capacity for heavy metal ions and has strong retention capacity after adsorption, the modified biochar can be widely used in soil carbon fixation and heavy metal pollution treatment.

The invention relates to a detoxification method for simultaneously removing dioxin and heavy metal in waste incineration fly ash, which comprises the following steps of: pretreating fly ash and simultaneously removing dioxin and heavy metal in fly ash, namely, removing sodium salt and potassium salt in fly ash by adopting an immersion cleaning mode; the method comprises the following steps: pre-treating fly ash to avoid reducing the curing capacity of a sintering product formed by high-temperature sintering of the fly ash on heavy metals, separating the pre-treated fly ash to obtain a solid phase, mixing the solid phase with magnesium salt and / or calcium salt, and carrying out high-temperature roasting, so that chlorine decomposed by dioxin in the fly ash reacts with the heavy metals to form gaseous heavy metal chloride to remove the heavy metals in the fly ash; in the high-temperature roasting process, the magnesium salt and / or the calcium salt and ash in the fly ash form calcium silicate and / or magnesium silicate under high-temperature reaction, so that the curing capacity of crystal lattices in a fly ash sintering product is enhanced. After the waste incineration fly ash is subjected to detoxification treatment by adopting the method, heavy metals Hg, Pb, Cd, Cu and Ni are not detected in the fly ash leachate, so that the leaching risk of the heavy metals remained in the fly ash can be obviously reduced.

The present invention provides a soil conditioner and a preparation method and application thereof, belonging to the technical field of soil conditioners. The soil conditioner of the present invention comprises the following raw materials in parts by weight: 70 to 90 parts of modified pig manure biochar, 8 to 15 parts of polyaspartic acid, 5 to 10 parts of potassium titanium oxalate, 1 to 3 parts of ammonium molybdate, 40 to 60 parts of calcium silicate, and 20 to 30 parts of lime. The present invention uses a mixed modifier to modify pig manure biochar, which can greatly reduce the content of cadmium and arsenic in edible parts. In addition, the raw materials in the soil conditioner cooperate with each other to reduce the content of heavy metals in the edible parts to the greatest extent.

The invention discloses a quick-setting high-strength expansive type leakage crack plugging material and method and application, and belongs to the technical field of cement-based material admixtures, the quick-setting high-strength expansive type leakage crack plugging material is prepared by adopting a mixing method, and the quick-setting high-strength expansive type leakage crack plugging material comprises a base material formed by compounding cement, desulfurized gypsum, calcium oxide, alkaline aluminum oxide, calcium formate, hydrated calcium silicate, carboxyl cellulose and a solid polycarboxylate superplasticizer; the active component is formed by compounding polyaluminum sulfate, magnesium sulfate, disodium ethylene diamine tetraacetate, borax and a defoaming agent; the superfine fly ash, the superfine silicon dioxide, the superfine hydroxyapatite, the superfine zinc sulfate, the nano titanium dioxide and the superfine boron nitride are compounded to form a structure regulating functional component. The three components are uniformly stirred by adding water, and then are mixed with an exciting agent to be used for plugging leakage cracks and filling gaps. The leakage plugging material provided by the invention has the advantages of scientific and reasonable composition, simple preparation and application methods, rapid curing, high strength, good durability, micro-expansion and the like, and has good plugging and filling effects on water bursting, water permeation and gas.

The invention relates to the technical field of waterproof building materials, in particular to a waterproof building material. The waterproof building material is prepared from the following raw materials in parts by weight: 80-100 parts of cement, 8-15 parts of modified montmorillonite, 5-8 parts of modified konjac glucomannan, 3-5 parts of a fiber reinforced material, 1-3 parts of a coupling agent, 1-3 parts of a dispersing agent and 0.1-0.5 part of a defoaming agent. According to the invention, through the synergistic effect of various raw materials, after the montmorillonite is modified, the interlayer spacing is increased, the hydrophilicity is weakened, a nano-scale sheet-shaped barrier layer can be formed in a cement matrix, like countless tiny shields, and water molecule permeation is effectively blocked, and the modified konjac glucomannan has good water resistance in an alkaline cement environment. The water-proofing agent has a cross-linking reaction with hydrated calcium silicate and calcium hydroxide of cement to form a continuous gel network structure to fill pores and capillary channels in set cement and cut off water seepage channels, so that a good water-proofing effect of a building in a long-term humid environment is ensured.

The invention relates to a composite powder explosion suppressant for suppressing aluminum hydride explosion and a preparation method of the composite powder explosion suppressant, belongs to the technical field of explosion suppressants, and solves the problems of single action mechanism, high required explosion suppression concentration, low efficiency and the like of a traditional explosion suppressant. According to the solution, the composite powder explosion suppressant for suppressing aluminum hydride explosion is prepared through raw material pretreatment, powder mixing and drying in sequence, and the composite powder explosion suppressant is prepared from the following components in parts by mass: 10.2 to 30.2 parts of melamine cyanurate, 20.4 to 40.6 parts of monopotassium phosphate, 15.2 to 25.2 parts of potassium bicarbonate, 8.4 to 13.2 parts of aluminum hydroxide, 6.8 to 11.1 parts of zinc borate, 5.0 to 9.0 parts of fumed silica and 2.0 to 5.3 parts of calcium silicate. The explosion suppressant can act on different combustion areas and combustion stages in the aluminum hydride explosion process, the physical and chemical explosion suppression effects of all the components of the explosion suppressant are fully exerted, and meanwhile, efficient explosion suppression of aluminum hydride explosion can be achieved through the synergistic effect of all the components.

The invention relates to sulfur silicate cement and a preparation method thereof. Relates to the technical field of cement. Comprising sulfur silicate clinker, gypsum, a mixed material and a performance adjusting component, the sulfur silicate cement comprises the following components in parts by mass: 50-90 parts of sulfur silicate clinker, 4-25 parts of gypsum, 5-50 parts of a mixed material and 0-5 parts of a performance adjusting component. The mineral composition of the sulfur silicate clinker is as follows: 15 to 50 weight percent of calcium sulphoaluminate, 5 to 50 weight percent of calcium sulphosilicate, 10 to 70 weight percent of dicalcium silicate, 2 to 15 weight percent of free gypsum and 0 to 2 weight percent of free lime; the 45-micron screen residue of the sulfur silicate clinker is less than or equal to 25%. According to the invention, under the condition that the mineral composition of the sulfur silicate clinker is changed, the hydration degree of the clinker is improved and the consumption of the clinker is saved by compounding the proper gypsum and the admixture, the clinker coefficient can reach 0.5-1, and the cement cost and carbon emission are effectively reduced.

The present invention belongs to the field of waterborne coatings, and discloses a lightweight waterborne multi-functional coating for new energy vehicles. According to the parts-by-weight ratio, it includes 67 parts of acrylic emulsion, 18 parts of modified hydrophobic calcium silicate aerogel micropowder, 5.7 parts of water, 0.3 parts of modified cellulose, 0.7 parts of dispersant, 3 parts of polyether polyol, and 2.8 parts of blocked aliphatic isocyanate. It mainly solves problems such as noise reduction, shock absorption, and lightweight of automobiles, and solves the problem that traditional waterborne damping coatings have a relatively large density and are difficult to reduce weight. The present invention synthesizes modified hydrophobic calcium silicate aerogel, which maximally reduces the dry film density while ensuring strength, and prevents the decline of damping performance caused by water absorption; polyether polyol and blocked aliphatic isocyanate are used for activated micro-foaming in the medium and high temperature regions, which not only achieves the purpose of sound insulation and noise reduction, but also reduces the density and realizes the lightweight of the material.

The invention discloses a lightweight heat-insulating fireproof material and a preparation method thereof, and relates to the technical field of fireproof materials. The light heat-insulation fireproof material provided by the invention is prepared from the following components in parts by weight: 15 to 25 parts of nano aluminum oxide fiber, 10 to 20 parts of calcium silicate powder, 30 to 40 parts of modified phosphorus-nitrogen flame retardant, 5 to 8 parts of zinc borate, 5 to 10 parts of epoxy resin, 8 to 15 parts of silicon dioxide aerogel, 3 to 5 parts of expanded graphite, 1 to 2 parts of coupling agent, 0.5 to 1.5 parts of foaming agent and 0.1 to 0.5 part of dispersing agent. The fireproof material prepared by the invention simultaneously meets the requirements of high strength, ultralow heat conductivity coefficient and high fire endurance.

The invention belongs to the technical field of wastewater treatment, and provides a method for removing and recovering manganese from acid mine wastewater. The method comprises the steps that the acid mine wastewater is subjected to iron removal treatment to obtain iron removal supernate, a manganese removal agent is added into the iron removal supernate to obtain manganese precipitation residues and manganese removal supernate, the manganese precipitation residues and sulfuric acid are mixed to obtain leaching liquid and leaching residues, and the leaching liquid is electrolyzed to obtain metal manganese; the manganese removal agent is sodium silicate and / or sodium metasilicate. According to the method, the added manganese removal agent does not enable silicate ions and manganese ions to generate manganese silicate, but enables the silicate ions to generate a hydrated calcium silicate adsorbent or a porous magnesium silicate adsorbent in situ with calcium and magnesium ions by using the calcium and magnesium ions existing in the acid mine wastewater, so that the recovery and removal of manganese are realized; the method disclosed by the invention is simple and low in cost, and not only realizes recovery of manganese resources, but also realizes deep treatment of residual manganese; and the leaching residues generated in the manganese recovery stage can also be used for deeply treating the manganese-removed supernate, so that the generation of waste residues is reduced.

The invention discloses a high-performance cement-based micro-expansion filling grouting material and a preparation method thereof, and belongs to the technical field of inorganic cementing materials. The high-performance cement-based micro-expansion filling grouting material is prepared from Portland cement, fly ash, graded aggregate, aluminum silicate coated aluminum powder, calcium silicate coated magnesium oxide, tung oil coated iron powder, a calcium formate early strength agent, polycarboxylate superplasticizer powder and water. According to the obtained high-performance cement-based micro-expansion filling grouting material, the fluidity ranges from 432 mm to 441 mm, the 28-day compressive strength ranges from 63.5 MPa to 65.2 MPa, the 28-day breaking strength ranges from 14.3 MPa to 15.1 MPa, the 28-day shrinkage rate ranges from 0.01% to 0.04%, and the 10-time freezing and thawing expansion rate ranges from 0.03% to 0.06%.

The invention discloses an inorganic silicon modified water-based corrosion-inhibition anticorrosive coating containing functional polysiloxane as well as a preparation method and application of the inorganic silicon modified water-based corrosion-inhibition anticorrosive coating. The coating is prepared from the following components in parts by weight: 30 to 60 parts of water-based hybrid acrylic emulsion, 1 to 15 parts of functional polysiloxane, 5 to 25 parts of inorganic silicon-based corrosion-inhibition filler, 10 to 40 parts of pigment filler, 1 to 5 parts of water-based additive and the balance of water. The functional polysiloxane is an amino or silicon hydroxyl / alkoxy functionalized polysiloxane emulsion; the inorganic silicon-based corrosion inhibition filler is a combination of calcium ion exchange type silica gel pigment and calcium silicate. The inorganic hybrid emulsion, the functional polysiloxane and the inorganic silicon corrosion inhibition pigment are compounded, so that a coating is endowed with excellent physical shielding property, active corrosion inhibition property and surface hydrophobicity, quick drying, high hardness, excellent water resistance and salt fog resistance and long-acting corrosion resistance are realized, and the water-based anticorrosive paint is particularly suitable for the harsh requirements of a marine environment, and has a wide application prospect. The method is of great significance to development of the ship industry.

The invention belongs to the technical field of building materials, and particularly provides a low-carbon energy-saving fiberboard, which is prepared from the following components in parts by weight: 8 to 38 parts of steel slag, 12 to 36 parts of fly ash, 0 to 20 parts of cement, 10 to 48 parts of desulfurized gypsum, 2 to 4 parts of silica fume, 3 to 9 parts of quartz tail mud, 6 to 10 parts of dry paper pulp fiber, 0.1 to 0.48 part of gypsum retarder, 0.48 to 1.20 parts of alkali activator and 0.01 to 4.32 parts of modifier. According to the fiberboard, solid waste is adopted as a main material, an alkaline activator is adopted to excite a reaction and promote generation of calcium aluminum sulfate and other minerals, a modifier is adopted to enhance the water resistance of a gypsum-based product, recycled paper is adopted to replace part of raw paper, the production cost is reduced, fiber directional distribution is improved, and the longitudinal and transverse fracture resistance ratio of the fiberboard is increased. The steel slag pre-carbonization can effectively eliminate free calcium oxide and magnesium oxide in the steel slag, and reduces the damage of the later hydration expansion of the active alkali to the structure. And the uncarbonized tricalcium silicate and dicalcium silicate in the material are hydrated to form hydrated calcium silicate, calcium aluminum sulfate and other minerals through steam normal-pressure curing.