2569 results about "Calcium oxide" patented technology

The invention discloses a preparation process of an aluminum oxide ceramic material, which comprises the following steps: S1, pretreatment of aluminum oxide powder: taking alpha-Al2O3 powder as a raw material, adding a dispersion medium, carrying out ball milling, transferring into an ultrasonic dispersion machine, dispersing, and further carrying out vacuum drying to obtain pretreated aluminum oxide powder; s2, chemical activation treatment: weighing pretreated aluminum oxide, magnesium oxide, nano silicon dioxide, calcium oxide, zirconium dioxide, titanium dioxide and modified nano silicon carbide in parts by weight, mixing, sequentially adding a dispersing agent absolute ethyl alcohol and a KH550 silane coupling agent, stirring at a high speed, adding a polyvinyl alcohol binder, and continuously stirring to obtain ceramic slurry; s3, sieving the ceramic slurry, filling the ceramic slurry into a mold, and performing isostatic pressing to obtain a ceramic green body; and S4, putting the ceramic green body into a box-type sintering furnace, sintering step by step, and cooling to room temperature along with the furnace to obtain the aluminum oxide ceramic material. The prepared aluminum oxide ceramic material has high compactness, excellent dielectric strength and mechanical property, low energy consumption and great application potential.

The invention relates to the technical field of phosphorus-containing and fluorine-containing wastewater treatment, provides a phosphorus and fluorine removal agent and a preparation method thereof, and solves the problems that an existing phosphorus and fluorine removal agent is high in manufacturing and using cost, poor in fluorine removal effect and likely to cause secondary pollution due to the fact that the existing phosphorus and fluorine removal agent is greatly influenced by pH. The dephosphorization and defluorination agent is composed of calcium chloride, calcium oxide and active magnesium oxide; the preparation method comprises the following steps: preparing calcium chloride, calcium oxide and active magnesium oxide according to purity and particle size; mixing calcium chloride, calcium oxide and active magnesium oxide according to the molar ratio; adding active magnesium oxide into the premixed calcium chloride and calcium oxide according to the mass ratio of calcium oxide to calcium chloride to active magnesium oxide of 1: 2: (7-12); the mixed powder is subjected to refining treatment through a fine grinding machine, and the refined powder is subjected to secondary screening; and sealing, packaging and storing the refined powder. The use condition is simple, and only active magnesium oxide is required to be mixed with calcium oxide and calcium chloride in proportion.

The invention provides a cement paste system with high strength, elasticity and toughness and application of the cement paste system in deep coal bed gas horizontal well cementation, and the cement paste system is prepared from the following raw materials in parts by mass: 40-70 parts of oil well cement, 13-40 parts of fly ash, 15-45 parts of slag, 5.0-20.0 parts of water-based organic silicon resin, 0.1-0.5 part of ultra-high performance polyethylene fiber, 3.0-8.0 parts of calcium oxide and 2.0-5.0 parts of calcium sulfate whisker. 1.0-8.0 parts of nano silicon dioxide, 1.0-6.0 parts of a fluid loss agent, 0.5-2.0 parts of a drag reducer, 0.2-1 part of a defoaming agent and 50-80 parts of water. The cement paste system disclosed by the invention has the characteristics of remarkable low-temperature quick setting and high early strength, also has the advantages of low water loss, controllable thickening, simple preparation operation and the like, and set cement is high in compressive strength, high in breaking strength and very excellent in elastic and tough mechanical properties.

The invention relates to a method for preparing a high-concentration calcium chloride solution by using alkaline residues and ammonia distillation waste clear liquid, which comprises the following steps of: reacting a byproduct hydrogen chloride with the alkaline residues and the ammonia distillation waste clear liquid to obtain a calcium chloride solution with a certain concentration, adding calcium oxide to remove magnesium ions in the calcium chloride solution, and evaporating and concentrating by using waste heat of the ammonia distillation waste clear liquid to obtain the high-concentration calcium chloride solution. And finally, acidifying by using a byproduct hydrogen chloride to obtain a raw material for producing calcium chloride dihydrate in a calcium chloride factory. The process is simple and effective, solves the problem that the alkaline residues are easy to block in the prior art, fully utilizes the alkaline residues and the ammonia distillation waste clear liquid generated in the process of preparing alkali by an ammonia-alkali method, recycles waste heat in the ammonia distillation waste clear liquid, and improves the concentration of the calcium chloride liquid, so that the process has good practicability and economic value.

The invention discloses a phosphorus removal filler and a preparation method and application thereof, and belongs to the technical field of fillers. Sulphoaluminate cement, chitosan, sodium alginate and calcium peroxide are uniformly mixed in a nitric acid solution in an amino-containing coupling agent, then foaming and pore forming are performed under steam, and the phosphorus removal filler is prepared. And finally, uniformly mixing with titanium dioxide, sodium silicate, a ferrous sulfate solution and sodium borohydride to obtain the phosphorus removal filler with an excellent phosphorus removal effect, and the phosphorus removal filler has a rich pore structure and adsorption activity, can sufficiently perform physical adsorption on phosphorus elements, and has a good phosphorus removal effect. Meanwhile, the phosphorus removal filler further has excellent surface complexing activity and photocatalysis, insoluble salt precipitates can be generated through reaction of iron elements and calcium elements and phosphate in water, so that total phosphorus is removed, the material is ground after adsorption saturation and put into a fish pond to serve as a phosphorus supplementing material, resource recycling can be achieved, and the cost is reduced. Wide application prospects are realized.

The invention belongs to the technical field of calcium hydroxide preparation, and particularly relates to a preparation method of calcium hydroxide with high specific surface area, which comprises the following steps: S1, adding triethanolamine and diethanolisopropanolamine into water, and uniformly mixing to obtain an active agent solution; s2, mixing quick lime with an active agent solution, and carrying out digestion reaction to generate a calcium hydroxide coarse material; and S3, sieving and drying the calcium hydroxide coarse material to obtain the calcium hydroxide with the high specific surface area. The specific surface area of calcium hydroxide can be remarkably increased through the active agent solution, meanwhile, the uniformity and sufficiency of the quick lime digestion reaction are optimized, the calcium hydroxide particle aggregation phenomenon is reduced, and finally the calcium hydroxide product with the high specific surface area and the high activity is prepared.

The invention provides a modified coal gangue-based large-flow-state grouting and water plugging material and a preparation method thereof. Comprising 80-90 parts of a coal gangue sample, 1-5 parts of Portland cement, 1-5 parts of sulphoaluminate cement, 0.51-3 parts of a polycarboxylic acid water reducing agent, 1-4 parts of cellulose ether with the viscosity of 200w, 0.1-5 parts of a calcium oxide expanding agent, 0.5-5 parts of a plastic expanding agent, 0.5-1 part of redispersible latex powder, 0.5-5 parts of polyacrylamide with the molecular weight of 1000 and water, and the water-material ratio is 0.4. According to the modified coal gangue-based large-flow-state grouting and water plugging material and the preparation method thereof, the cement consumption can be remarkably reduced, the cost is reduced, the utilization rate of solid wastes (such as coal gangue) is increased, and the material has good flow-state performance and adjustable setting time; the method is suitable for deep and large shaft surrounding rock water seepage treatment in coal mining and other mine engineering.

The invention relates to the technical field of polyurethane adhesives, in particular to a quick-curing two-component hot-pressing adhesive as well as a preparation method and application thereof. Comprising a component A and a component B. The component A comprises, by weight, 20 to 60 parts of castor oil polyol, 40 to 80 parts of a filling material, 0.001 to 0.01 part of a catalyst and 0.001 to 0.006 part of an auxiliary agent, and the catalyst comprises a triethylene diamine-terminated heat-sensitive catalyst; and the component B comprises an isocyanate curing agent. The filler comprises heavy calcium carbonate and calcium oxide, and the weight ratio of the heavy calcium carbonate to the calcium oxide is (25-40): 1, so that not only can the cost be effectively reduced, but also the tensile-shear strength of the hot-pressing adhesive can be improved; and when the particle size of the filler is adjusted to be 500-2000 meshes, the tensile-shear strength after cementing can be effectively maintained within a relatively low curing time (3-5 minutes), and meanwhile, the storage stability of the sizing material is improved.

The invention discloses a special phosphorus removal agent for deep phosphorus removal and a preparation method and application thereof, and relates to the field of phosphorus removal agents and preparation methods thereof.The phosphorus removal agent is prepared from a porous precursor, an activating agent and a dispersing agent, and the porous precursor comprises at least one of aluminum oxide, iron oxide, calcium oxide and magnesium oxide; the activating agent comprises at least one of lanthanum salt, cerium salt, zircon salt, magnesium salt and ferric salt. By optimizing the composition of the porous precursor and activating treatment, the phosphorus adsorption capacity is remarkably improved, the phosphorus removal agent also plays a role in micro-flocculation in the process of mixed adsorption with sewage, a wet adding mode is adopted, the adding amount can be flexibly adjusted according to the phosphorus concentration condition of inlet water and outlet water, and the phosphorus removal efficiency is improved. The phosphorus removal agent can reduce the total phosphorus concentration in tail water of a sewage treatment plant to 0.5 mg / L or below.

The invention discloses high-strength concrete and a preparation method thereof in the field of concrete. The high-strength concrete is prepared from the following raw materials in parts by weight: superfine sulphoaluminate cement; coarse aggregate; quartz sand; silica fume; coal ash; nano metakaolin; silicon carbide whiskers; a graphene oxide; a pH responsive microcapsule; coating the steel fibers with liquid metal; a carbon nanotube; and a polycarboxylic acid water reducer. Release of the repairing agent is accurately regulated and controlled by adopting the pH response microcapsule, the interface performance is enhanced by combining with the liquid metal coating steel fiber, and the composite dispersion process of the nano material is optimized. Wherein the environment response efficiency of the microcapsule is remarkably improved through the collaborative design of a calcium oxide-slow release agent system and a methyl methacrylate / acrylic acid copolymerization shell layer; according to the gallium-based liquid metal coating, metallurgical bonding of fibers and a matrix is achieved through the low-melting-point characteristic, and traditional physical bonding limitation is broken through.

The invention belongs to the technical field of desiliconized fly ash, and particularly relates to a high-alumina-silica-ratio material capable of replacing bauxite as well as a preparation method and application of the high-alumina-silica-ratio material. The preparation method comprises the following steps: S1, crushing coal gangue, and grinding the crushed coal gangue until the particle size is less than 40 meshes to obtain a ground material; s2, mixing the ground material and a catalyst according to a weight ratio of 100: (1-2), roasting, and cooling to obtain activated coal gangue; the catalyst comprises sodium carbonate, calcium oxide and aluminum oxide in a weight ratio of 1: (0.3-0.5): (1.4-1.6); s3, mixing a sodium hydroxide solution, the activated coal gangue and a surfactant, and reacting at 50-90 DEG C for 1-6 hours to obtain desiliconized slurry; and S4, filtering the desiliconized slurry, collecting a solid phase, washing with water, and drying to obtain desiliconized fly ash, namely the high alumina-silica ratio material capable of replacing bauxite. The method is high in desiliconization rate.

The invention relates to the technical field of mineral processing, in particular to a method for separating calcium and magnesium components of calcined dolomite based on carbon dioxide. The calcined dolomite comprises magnesium oxide and calcium oxide, and the method comprises the following steps: digesting the calcined dolomite and water to obtain a calcined dolomite suspension; carrying out bubbling treatment on the raw material gas containing carbon dioxide under a preset condition to obtain fine raw material bubbles; carrying out carbonization reaction on the fine raw material bubbles and the calcined dolomite turbid liquid to obtain a mixed turbid liquid; and carrying out solid-liquid separation on the mixed turbid liquid to respectively obtain calcium carbonate and a magnesium-containing liquid phase. According to the method, raw material gas containing carbon dioxide is subjected to bubbling treatment to obtain fine raw material bubbles, then the fine raw material bubbles and calcined dolomite turbid liquid are promoted to be subjected to gas-liquid-solid three-phase carbonization reaction, and the separation effect of calcium and magnesium components of the calcined dolomite turbid liquid can be improved under the harmless condition; the grades of the final calcium carbonate and magnesium oxide are respectively over 98 percent.

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 coal gasification slag-based backfill material for replacing flow-state solidified soil, a preparation method and an application, utilizes a synergistic gelling effect among three raw materials, breaks through a material strength forming mechanism of traditional flow-state solidified soil, solves the problems of multiple components and high cost of a flow-state solidified soil material in the prior art, and has the advantages of low raw material cost, low raw material cost, low raw material cost, low raw material cost and the like. And the product popularization is facilitated. The specific scheme is as follows: the coal gasification slag-based backfill material for replacing the fluidized stabilized soil comprises coal gasification slag, carbide slag and titanium gypsum, the ratio of the coal gasification slag to the carbide slag to the titanium gypsum is 6-8: 1.5-3.5: 0.5-1.5, and an alkaline activator is also added; the coal gasification slag is a slag block with a set particle size formed after slag at the bottom of a gasification furnace is cooled, the carbide slag is waste slag which takes calcium oxide as a main component after acetylene gas is obtained by hydrolyzing calcium carbide, and under the action of an exciting agent, the coal gasification slag and the carbide slag are fully activated to release polyhedrons; part of the polyhedrons form a gelling product so as to improve the early strength of the coal gasification slag-based backfill material.

The invention belongs to the technical field of low-temperature HIB steel, and particularly relates to modified magnesium oxide and a preparation method and application thereof. The modified magnesium oxide provided by the invention comprises a magnesium oxide matrix as well as calcium oxide and vinyl silane which are adsorbed on the surface of the magnesium oxide matrix, the 40% CAA of the magnesium oxide matrix is 60-70 s, and the 70% CAA of the magnesium oxide matrix is 125-145 s. Calcium oxide is introduced into silicon steel grade magnesium oxide, so that the alkalinity of modified magnesium oxide is further improved; under the combined action of calcium oxide and vinyl silane, the reaction activity of modified magnesium oxide and silicon dioxide on the surface of a silicon steel sheet is improved, 70% CAA seconds are reduced under the condition that 40% CAA activity seconds are not changed, the synthesis capacity of a magnesium silicate bottom layer is improved, and the uniformity and surface quality of the magnesium silicate bottom layer synthesized by low-temperature HIB steel are improved; therefore, the properties of iron loss and magnetic induction intensity of the low-temperature HIB steel are ensured.

The invention discloses a preparation method and application of a full-particle-size steel slag gradient carbonized artificial aggregate suitable for an asphalt ultrathin wearing layer, relates to a preparation method and application of an artificial aggregate, and aims to solve the technical problems that the strength of the existing carbonized steel slag aggregate is low, and multi-element solid waste resources cannot be comprehensively utilized. The method comprises the following steps: carrying out crushing, magnetic separation and screening on steel slag to obtain particles with different particle size grades; and sequentially carrying out pre-curing, granulation curing, pre-curing and post-curing treatment on each grade of particles to obtain the full-particle-size steel slag gradient carbonization artificial aggregate. The average carbon fixation amount of the aggregate is 12.4%, the average free calcium oxide content is 0.32%, the average compressive strength is 54.32 MPa, and the volume expansion rate is 0.32% when the aggregate is kept at the temperature of 60 DEG C for 5 days. When the aggregate is used for preparing an ultrathin wearing layer SMA-10 type asphalt mixture, the dynamic stability is 13285 times / mm, the immersion Marshall is 96.5%, and the anti-skid BPN value is 0.76. The method can be used in highway fields.

The invention belongs to the field of hydrometallurgy, and particularly discloses a high-purity vanadium oxide electrode and a preparation method thereof. The method comprises the following steps: pre-treating the alkaline vanadium leaching solution by using an activated aluminum oxide adsorption column to obtain a pre-treated solution; adding a composite impurity removal agent taking modified lignosulfonate as a main agent into the pretreatment liquid for primary impurity removal to obtain primary impurity-removed filtrate; adding a calcium hydroxide suspension and a flocculating agent into the primary impurity-removed filtrate for secondary impurity removal to obtain secondary impurity-removed filtrate; purifying the secondary impurity-removed filtrate by using an ion exchange column to obtain a purified solution; ammonium salt is added into the purified liquid for vanadium precipitation, and ammonium metavanadate crystals are obtained; calcining the ammonium metavanadate crystal to obtain high-purity vanadium pentoxide; and preparing the high-purity vanadium oxide electrode by using the high-purity vanadium pentoxide. According to the scheme, the high-purity vanadium pentoxide is prepared by taking the alkaline vanadium leaching solution as a raw material through a multi-stage deep impurity removal process, and the high-purity vanadium oxide electrode is prepared by taking the alkaline vanadium leaching solution as the raw material.

The invention relates to the technical field of ceramic substrates, and provides a bending-resistant aluminum oxide multilayer ceramic substrate and a preparation method thereof. The bending-resistant aluminum oxide multilayer ceramic substrate comprises the following raw material components in parts by weight: 95-110 parts of aluminum oxide, 3-8 parts of a plasticizer, 6-12 parts of an auxiliary agent, 4-7 parts of a binder, 3-6 parts of a dispersant and 60-70 parts of a solvent, the preparation method of the additive comprises the following steps: A1, adding calcium oxide into ethanol, adding glucose, stirring until the materials are uniformly mixed, and concentrating to obtain a glucose coated material; a2, carrying out annealing treatment on the glucose coated material to obtain a carbon coated material; and A3, uniformly mixing the carbon-coated material with magnesium oxide and titanium dioxide, and carrying out ball milling to obtain the auxiliary agent. According to the technical scheme, the problem of low mechanical property of the aluminum oxide ceramic substrate in the prior art is solved.

The invention relates to the technical field of environmental protection and dust removal, and discloses a dust removal device for calcium hydroxide product production, the dust removal device comprises a box body, the lower surface of the box body is provided with two sets of dust falling hoppers, the two sides of the box body are fixedly connected with an air inlet pipe and an air outlet pipe respectively, and the inner wall of the box body is provided with a partition plate. The driving assembly drives the pulse sliding pipe and the plugging assembly to move downwards, after the pulse sliding pipe and the plugging assembly move to a certain position, the control assembly controls the plugging assembly to plug a certain section of the filter cartridge, then the pulse mechanism enables gas to pass through the pulse main pipe, the pulse fixing pipe and the pulse sliding pipe, and then the gas is blown out from the pulse head. And then the driving assembly drives the blocking assembly to continue to move downwards, pulse dust removal is carried out on the filter cartridge section by section, pulse airflow accurately covers the whole section of the filter cartridge, it is ensured that dust on all parts can be thoroughly removed, and the dust removal effect is greatly improved.

The invention provides a potassic salt ore old brine-tail salt full-recycling cemented filling process based on magnesium-calcium synergistic conversion, and belongs to the field of potassic salt ore goaf filling, CaO is added into old brine for reaction to obtain Mg (OH) 2 / Ca (OH) 2 mixed precipitate, then a dispersing agent is added, and solid-liquid separation is performed to obtain a solid mixture and a post-reaction mother solution; dividing the tail salt into particle sizes gt according to particle sizes; the method comprises the following steps: mechanically grinding coarse tail salt with the particle size of 75 microns and fine tail salt with the particle size of less than or equal to 75 microns until the particle size lt is reached; filtering to obtain activated crude tail salt; mixing the fine tail salt with an exciting agent, and activating through ball milling to obtain activated fine tail salt; and mixing the activated crude tail salt, the activated fine tail salt, the solid mixture and the reacted mother liquor, adding a retarder and a water reducing agent, stirring to obtain filling slurry, and pumping the filling slurry into a well for filling in multiple layers. According to the method, Mg < 2 + > in old brine is directionally converted through calcium oxide to generate a Mg (OH) 2 / Ca (OH) 2 gelling phase, and a low-cost and high-strength filling system is formed by combining a tail salt grading activation technology.

The invention discloses a method for preparing calcium hydroxide slurry with high specific surface area and high pore volume, which comprises the following steps: S1, adding an alcohol reagent into water to obtain a solution A; s2, adding an inorganic salt solution into the solution A, and uniformly mixing to obtain a solution B; s3, a reagent X is added into the solution B, ultrasonic mixing is performed to obtain a solution C, and the reagent X is a mixture of phenol or triethanolamine, ethidene diamine and ethylamine; and S4, adding calcium oxide powder into the solution C, continuously stirring, and reacting to obtain calcium hydroxide slurry. The invention provides a method for preparing calcium hydroxide slurry with high specific surface area and high pore volume, the calcium hydroxide slurry prepared by the method can form calcium hydroxide with high specific surface area and high pore volume when in use, and the method aims to solve the problems of low specific surface area and low pore volume of the existing calcium hydroxide. Therefore, the problem of desulfurization performance inactivation caused by blockage of calcium hydroxide (desulfurizer) pores by generated CaSO3 and CaSO4 in the desulfurization process is avoided.

A system and method for amending out of specification ash to a suitable amended addition material to a concrete mixture includes analyzing a unit quantity of out of specification ash to determine concentrations of each of calcium oxide, sulfur trioxide, and unburnt carbon. The out of specification ash is sieved to determine fineness. Based upon measured concentrations and determined fineness, a mixture is designed to add materials in design-determined quantities of each of quicklime, kaolin, masonry silica blend, manufactured sand and in specification fly ash. By adding each of the quicklime, kaolin, masonry silica blend, manufactured sand and in specification fly ash in each of the design-determined quantities, creating an amalgamated blend of added materials to form an amended addition material. The amended addition material is substituted for a selected quantity of Portland cement in the concrete mixture.

A method of capturing carbon dioxide, including providing a particle containing magnesium oxide, calcium oxide, or a combination thereof; and providing a mixture gas to contact the particle, wherein the mixture gas includes water vapor, carbon dioxide, and nitrogen oxide, and the particle captures the carbon dioxide to form a carbonated particle and a treated gas. The mixture gas has a relative humidity of 25% to 95%, a nitrogen oxide concentration of 20 ppm to 2000 ppm, and a carbon dioxide concentration of 0.05% to 15%.

The utility model relates to the technical field of limestone calcination, in particular to a limestone calcination device which comprises a rotary kiln and a preheater, a coarse material bin, a first preheating area, a second preheating area and a discharging chute are distributed in the preheater from top to bottom, and a coarse material inlet is formed in the top of the coarse material bin. The coarse material bin is communicated with the first preheating area through a plurality of blanking pipes, a preheating table used for receiving blanking materials is arranged in the second preheating area, the preheater is provided with a material pushing mechanism used for pushing the materials on the preheating table into the discharging chute, and a fine material inlet is formed in the side wall of the preheater in the second preheating area. And the fine material inlet is externally connected with a fine material feeding mechanism. By using the device, the preheating effect of coarse material particles and fine material particles is improved, the coarse material particles and the fine material particles can be decomposed more completely after entering the rotary kiln, the quality of calcium oxide is improved, in the whole production process, the energy loss is reduced, the utilization rate of raw materials and resources and the overall production efficiency are improved, and the production cost is greatly saved.

The invention provides a boron nitride-containing resin composition and application thereof. The boron nitride-containing resin composition comprises a combination of a resin material and modified boron nitride, the modified boron nitride is prepared by the following method which comprises the following steps: mixing boron nitride and a sintering aid, sintering and crushing to obtain the modified boron nitride, the sintering aid comprises any one or a combination of at least two of calcium oxide, magnesium oxide, silicon oxide, yttrium oxide, niobium oxide and potassium feldspar. Through the design of a modification method, the modified boron nitride has a high filling rate in a resin material, and the boron nitride-containing resin composition containing the modified boron nitride not only has high thermal conductivity, but also has high peel strength and excellent adhesive property, so that the metal foil-clad laminated board has excellent comprehensive effects in the aspects of high thermal conductivity and high reliability.

The invention relates to a curing agent for an iron tailing engineering backfill material and a use method of the curing agent. The curing agent is composed of Portland cement, calcium hydroxide, fly ash, modified superfine slag powder, alkaline residues and a sodium phosphate buffer system. And by adding the curing agent, the backfill material has excellent compressive strength, durability and permeability resistance. Due to the filling and interface enhancing effects of the modified superfine slag powder, the compactness of the material is remarkably improved, and the porosity and the permeability coefficient are reduced; the alkaline residues accelerate the curing reaction, and the freeze-thaw resistance of the material is improved. The method is suitable for various complex geological and environmental conditions, and the stability and safety of the backfill material in an extreme environment are ensured.

The invention discloses a perfluorohexanone fire extinguishing agent and a preparation method and application thereof.The perfluorohexanone fire extinguishing agent is prepared from, by mass, 60-70 parts of perfluorohexanone microcapsules, 10-20 parts of aluminum hydroxide, 6-10 parts of graphite, 5-10 parts of titanium dioxide, 4-8 parts of ultraviolet absorbent, 2-6 parts of ammonium polyphosphate, 3-6 parts of calcium oxide, 1-3 parts of fumed silica, 1-3 parts of nano-silica and 1-3 parts of trimethyl phosphate. According to the formula and process of the fire extinguishing agent, through triple technical innovation of shell layer modification, nano compounding and supercritical deposition, the breakthrough of efficient explosion suppression, long-acting anti-after-combustion, low toxicity and environment friendliness of the fire extinguishing agent is achieved, and the industrial popularization potential is achieved.

The invention discloses high-resistance aluminum-magnesium spinel ceramic as well as a preparation method and application thereof, and relates to the technical field of preparation of ceramic materials. The ceramic comprises the following raw materials in parts by weight: 28-32 parts of silicon dioxide, 15-17 parts of magnesium oxide, 38-42 parts of aluminum oxide, 1-3 parts of lanthanum oxide, 2-5 parts of zirconium oxide, 1.5-2.5 parts of calcium oxide, 0.8-1.2 parts of tantalum oxide, 2-4 parts of titanium oxide and 1-3 parts of zinc oxide. The method provided by the invention has the advantages of low energy consumption, high production efficiency, high insulation resistance and the like, and solves the problems of low yield, complex equipment structure, high production cost and the like of the existing preparation method.

The invention discloses a multi-component nano inhibitor for flotation separation of high-argillaceous copper sulphide ore and application, the nano inhibitor is a nano calcium carbonate-calcium oxide-sodium humate coating body, the nano inhibitor is applied to flotation separation of the high-argillaceous copper sulphide ore, collaborative optimization of slime inhibition and copper ore selective collection is achieved, and the flotation separation efficiency of the high-argillaceous copper sulphide ore is improved. And high-quality copper sulfide concentrate and sulfur concentrate are obtained. According to the method, the high specific surface area and the surface activity of the nano particles are utilized, under the weak alkaline environment without desliming, through the simple, convenient, economical and efficient mineral processing technology and reagent combination, efficient recovery of copper, gold and sulfur in the high-argillaceous ore is achieved, the use amount of lime is greatly reduced, and the technical problem of tailing sedimentation is solved.

The present invention discloses a kind of preparation method and use method of anti-abrasion concrete admixture under freeze-thaw-solution environment, the admixture includes the components of following parts by weight:50~60 parts of STG powder, 5~8 parts of polyimide fibers, 1~3 parts of hydroxypropyl methyl (HPMC) cellulose, 10~13 parts of polycarboxylate water-reducing agent, 10~15 parts of antifreeze, 10~13 parts of expansion agent, wherein STG powder includes modified silica fume-glass powder, silicon carbide titanium, graphene oxide. Anti-abrasion concrete admixture under freeze-thaw-solution environment of the present invention can effectively suppress the decomposition of calcium hydroxide, and can refine pore structure, make hydraulic concrete more compact, while improving the ability of hydraulic concrete to resist dissolution, enhance its anti-abrasion performance, the admixture has good low temperature resistance, can be applicable to cold low temperature environment, for the anti-abrasion strength under low temperature conditions there is obvious improvement.