113 results about "Silenes" patented technology

The invention discloses a clean preparation method of a rare earth ferrosilicon alloy based on cooperative control of carbon addition and silicon supplement, and belongs to the technical field of thermometallurgy. In order to solve the problems that according to an existing carbon thermal reduction method, the furnace bottom is prone to nodulation, the recovery rate is low, and energy consumption is high, the'carbon addition-silicon supplementation-carbon depletion 'ternary cooperative regulation and control method is provided. Comprising the following steps: taking a rare earth-containing material, a siliceous raw material and a carbonaceous reducing agent as raw materials, burdening, pelletizing, and adding into a submerged arc furnace for reduction smelting; the core technology is that the weight ratio of oxide to reducing agent carbon in the rare earth pellets is controlled to be 1: (1.20-1.30), meanwhile, a silicon element accounting for 2.0-10.0% of the weight of the oxide is added, and parameters meet the coupling relational expression S = k * (1.30-R) * 100% + S0; and the smelting adopts carbon deficit operation, and the carbon addition amount is 0.90-0.95 times of the theoretical amount. The method inhibits the generation of the rare earth carbide nodule at the furnace bottom from the aspects of thermodynamics and dynamics, and realizes continuous and stable production. The rare earth recovery rate reaches 96% or above, the comprehensive power consumption is reduced to 8600-9000 kWh / t, the furnace life is prolonged to 25 months or above, and remarkable economic and environmental benefits are achieved.

The invention provides a smelting method of steel for a non-quenched and tempered crankshaft, the steel for the non-quenched and tempered crankshaft comprises the following chemical components in percentage by weight: 0.25%-0.50% of C, 0.20%-0.80% of Si, 0.80%-1.80% of Mn, 0.020%-0.060% of S, 0.015%-0.060% of Al, 50-200ppm of N, less than or equal to 0.020% of P and the balance of Fe, inevitable impurities and one or more of V, Ti and Nb, and the total content of V, Ti and Nb is less than or equal to 0.20%. The smelting method comprises the steps of converter smelting, LF refining, RH vacuum degassing and continuous casting. Wherein 1-3 kg / t of silicon ball deoxidizer, 2-4 kg / t of lime and 4-8 kg / t of wollastonite are added during converter smelting and tapping; in the LF refining process, a siliceous deoxidizer with the total amount of 0.5-1.5 kg / t steel is added in batches for diffusion deoxidation during heating, and meanwhile, lime with the total amount of 2-6 kg / t steel and wollastonite with the total amount of 4-9 kg / t steel are added; and in the later stage of LF refining, sulfur-iron alloy is added, Al alloying is conducted in the RH vacuum degassing process, and calcium wires are fed after vacuum breaking. The casting continuity of the steel for the non-quenched and tempered crankshaft can be improved, and the content of inclusions can be controlled.

The invention discloses a lightweight high-strength ceramsite proppant based on composite coating and low-temperature densification and a preparation method thereof. The coating proppant comprises a ceramsite proppant and a coating layer coating the surface of the ceramsite proppant, relates to the technical field of petroleum and natural gas engineering fracturing. The ceramsite proppant comprises bauxite, perlite, a composite sintering aid, B2O3 and AlF3. The composite sintering aid comprises MnO2 and TiO2; wherein the weight part ratio of the bauxite to the perlite to the composite sintering aid to the B2O3 to the AlF3 is 80: 20: (2.5-7.5): (3-12): (3-12); the low-grade bauxite and high-silicon raw material system is adopted, and a proper amount of sintering aid is introduced, so that the sintering temperature is effectively reduced, and the energy consumption is reduced; meanwhile, the volume density of the ceramsite proppant is reduced, and a lightweight product is obtained.

The present invention concerns an industrial chemical process (400f) and an apparatus for carrying out that process. The chemical process integrates into a single, combined method: (i) a method (303, 304) of producing iron and / or manganese from their ores, and (ii) a method (205a, 205b, 207, 208, 209) of producing an oxide or hydroxide of at least one of calcium, magnesium and iron from another ore respectively comprising a carbonate mineral of at least one of calcium, magnesium and iron. This combined method has the iron and / or manganese ore and the other ore comprising the carbonate mineral as its only essential ingredients, with common salt and / or water as optional extra ingredients. The combined method produces iron and / or manganese in elemental form, an oxide or hydroxide derived from the carbonate mineral, and oxygen as its corresponding products. If the iron and / or manganese ore also comprises a siliceous mineral, the method may also produce an alkaline mixture comprising sodium silicate as a co-product. Salt and water act as intermediaries to produce these end-products, but are only consumed if supplied in excess. An amount of sodium oxide, hydroxide and / or carbonate determined by the amount of salt consumed may be produced as a co-product, along with a corresponding amount of at least one of chlorine and hydrochloric acid. An amount of hydrogen determined by the amount of water consumed may also be produced as a co-product, along with an increased amount of oxygen. The iron, manganese and oxygen produced may all be used in steelmaking. Any excess oxygen may be safely vented to atmosphere. The oxide or hydroxide derived from the carbonate mineral may be used in cement manufacture, as a flux in steelmaking and / or as an ingredient in the manufacture of soda-lime glass. The alkaline mixture comprising sodium silicate may be used as an alkaline activator for an alkaline activated or geopolymer cement. The sodium carbonate may be used in the manufacture of soda-lime and / or borosilicate glass, for example. The chlorine and / or hydrochloric acid may be used in the manufacture of chlorinated organic compounds, for example. The hydrogen may be used as a fuel in a hydrogen economy. The method of the invention requires no nett input of heat because the chemical reactions it involves are exothermic overall. It also consumes no fossil fuels and has electricity as its only energy requirement. Thus if the electricity is produced from a source of renewable energy, this method produces no greenhouse gas emissions. In some embodiments, the method can even have a negative carbon footprint overall. The invention is intended to replace existing techniques for producing iron and / or manganese from their ores, including hydrogen-DRI, the calcination of limestone and other carbonate minerals, both in cement manufacture and in the production of lime for other purposes, and the ammonia-soda, or Solvay, process for the production of sodium carbonate. The invention therefore has the potential to eliminate up to about 20% of anthropogenic carbon dioxide emissions. [Fig. 9B]

The invention discloses an environment-friendly composite construction type tundish dry material and a preparation method thereof, and belongs to the technical field of refractory castable. The invention relates to an environment-friendly composite construction type tundish dry material which is divided into the following three parts according to tundish function partition and damage mechanism difference: a tundish bottom dry material, a tundish wall dry material and a tundish slag line dry material, the ladle bottom dry material is a forsterite dry material; the ladle wall dry material is in Rlt of molten steel in the ladle; when R of the molten steel in the ladle is larger than or equal to 1, the dry material is a ladle wall aluminum-silicon dry material, and when R is larger than or equal to 1, the dry material is a ladle wall magnesium dry material; the ladle slag line dry material is in Rlt of molten steel in the ladle; when R of the molten steel in the ladle is greater than or equal to 1, the dry material is a slag ladle line aluminum-silicon dry material, and when R of the molten steel in the ladle is greater than or equal to 1, the dry material is a slag ladle line magnesium-calcium dry material. According to different damage mechanisms of the tundish bottom, the tundish wall and the slag line area and the potential of hydrogen of molten steel, different dry materials are designed respectively, and through chemical compatibility matching of materials and working conditions, collaborative strengthening of permeation resistance of the tundish bottom, thermal shock resistance of the tundish wall and erosion resistance of the slag line is achieved.

The application relates to a preparation method of a beta-C2S crystal structure, and the specific steps are as follows: S1, calcium raw materials, silicon raw materials and a crystal structure regulator are mixed according to a calcium-silicon molar ratio of 2:1 to obtain sintered raw materials; S2, the sintered raw materials obtained in the step S1 are mixed with anhydrous ethanol, are pressed into a green body, are dried, are sintered, are naturally cooled, and beta-C2S is obtained. Compared with the prior art, trace heavy metals Cr2O3 and ZnO are used as the crystal structure regulator to regulate the beta-C2S crystal structure, so that sintering at a lower temperature, higher reactivity, reduced calcination energy consumption, reduced beta-C2S cost and the cooling mode of relatively rapid cooling in the furnace are realized, the method is safer, has very important practical significance for industrial production and application of the beta-C2S, and provides technical support for low-carbon development of the silicate cement.

The present invention provides a method (600a) and apparatus for producing an alkaline mixture comprising sodium silicate, which mixture is suitable for use as an alkaline activator for alkaline activated and geopolymer cements, but which may also be used, for example, to mineralize captured carbon dioxide. The method comprises comminuting (301) an ore of a target metal into fines, wherein the ore comprises a siliceous mineral and at least one of iron and manganese as the target metal. The siliceous mineral may comprise the target metal itself and / or it may be silica and / or another silicate mineral present as gangue. The ore is dehydrated and hydroxylated compounds contained therein are dehydroxylated (302). The ore thus treated is then reacted (601) in an inert atmosphere with an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and an oxide of the target metal from the ore, to precipitate out from the liquid sodium a solid phase comprising both the target metal in elemental form and other insoluble products comprising sodium oxide. The redox reaction is conducted at a temperature of at least 320 °Celsius to induce a reaction between the sodium oxide and silica derived from the siliceous mineral to produce sodium silicate, but also below a temperature at which the liquid sodium can react with the oxide of the target metal to produce a ternary oxide thereof. At least some of the liquid sodium having sodium silicate dissolved therein is then separated (305) from the solid phase and is reacted (602) with at least one of oxygen and water to produce a mixture comprising sodium silicate and at least one of sodium oxide and sodium hydroxide. The corresponding apparatus comprises a comminution device (such as a rock crusher or grinder), means for dehydrating and dehydroxylating the ore (such as a dryer), a gas-tight first reaction vessel for reacting the ore thus treated with the liquid sodium, a solid-liquid sodium phase separator, and a second reaction vessel for reacting the liquid sodium having sodium silicate dissolved therein with at least one of oxygen and water. The resulting alkaline mixture is therefore produced whilst extracting the target metal in elemental form from its ore. Thus the energy consumed is split between the production of these two co-products, making the method of the invention a low-energy method of producing an alkaline activator for alkaline activated and geopolymer cements. Both reactions (601, 602) are also significantly exothermic and at least some of the thermal energy from them may be recycled. The invention does not consume any carbon and is therefore at least carbon-neutral. On the other hand, it consumes the silica content of gangue mineral species and / or of siliceous minerals of the target metal in its ore, which have previously been treated as waste products. The amount of waste material produced when extracting the target metal from its ore is thereby reduced as well.

The invention discloses a gypsum composition as well as a preparation method and application thereof, and relates to the technical field of inorganic materials. The gypsum composition comprises gypsum, a filler, silicon-containing industrial solid waste, a nano siliceous material and an auxiliary agent, the nano siliceous material comprises nano silicon dioxide and modified nano silicon dioxide; the modified nano silicon dioxide is obtained by modifying nano silicon dioxide through a silane coupling agent. As gypsum putty, the gypsum composition has good coating matching performance, overcomes the defect that physical bonding between traditional gypsum putty and a coating is easy to peel off, can ensure that the coating is stable for a long time and does not fall off, improves the humidity resistance, and can keep stable performance and keep the beauty of wall decoration in the environments of plum rain seasons, coastal damp and the like. The service cycle is prolonged.

The invention discloses a low-creep siliceous prefabricated material and a preparation method thereof, and relates to the technical field of unshaped refractory materials, and the low-creep siliceous prefabricated material comprises the following components by weight: 40-50 parts of silica brick sand, 10-20 parts of calcined silica sand, 15-25 parts of silica brick powder, 1-5 parts of silica micropowder, 1-5 parts of calcium silicate cement clinker, 5-10 parts of silica sol, 1-5 parts of silicon nitride, and 0-0.5 part of a rare earth silicate solid solution. The composite water reducing agent is a mixture of sodium tripolyphosphate and a polycarboxylic acid water reducing agent, and the weight ratio of the sodium tripolyphosphate to the polycarboxylic acid water reducing agent is 2: 1. By optimizing the process ratio, the residual quartz amount and the creep rate of the siliceous prefabricated material are reduced, the long-term creep resistance of the siliceous prefabricated material under low stress is remarkably improved, and the siliceous prefabricated material with a more stable structure is provided for the high-temperature industry.

The present invention relates to a preparation method of a gypsum-based tile adhesive material, wherein the raw materials of the gypsum-based tile adhesive material include gypsum-based gel material, gypsum sand, dispersible latex powder, and cellulose ether; wherein the content of the gypsum-based gel material is within 40%. Compared with the existing scheme, the technical scheme of the present invention can be controlled to be 30-45% by developing a gypsum-based gel material and using gypsum sand as an aggregate. Moreover, due to the specially formulated gypsum-based gel material and gypsum sand in a water environment, the aluminum and silicon compounds in the raw materials undergo a ceramic reaction in an alkaline environment to form an ettringite structure (AFT) and / or hydrated calcium aluminate (C-S-H), thereby improving the density and water resistance of the tile adhesive solidification slurry, and having water-resistant properties in a real sense.

The invention discloses an experimental material for simulating gradual damage of a moraine structure, a preparation method and an experimental system. The preparation method comprises the following steps: preparing gravels, coarse sand and powder particles into a dry mixture; adding low-temperature molten soda-lime glass powder, and heating to form a siliceous cementation prototype; the preparation method comprises the following steps: adding pretreated calcium type clay and ice crystals into a material in a negative temperature environment, stirring, filling a mold and preliminarily fixing, feeding a carbonate solution into a fixed framework in batches through a liquid supply system at the bottom of the mold to realize mud-salt integrated synergistic cementation, and finally, compacting and carrying out negative temperature maintenance to obtain the experimental material. The experimental system integrates a temperature control unit, a pressurization and force measurement integrated module, an in-mold directional constant-flow liquid supply module and a control unit, and the whole process from material preparation to progressive failure test is integrated and automatically controlled. Compared with the prior art, the method has the advantages that an ice, mud-salt and siliceous triple cementation structure is successfully constructed in the material, and the problem of temperature and pressure disturbance caused by sample transfer is thoroughly solved.

Concrete materials and thermal energy storage devices employing such concrete materials are disclosed herein. The concrete material may include fibers in an amount ranging from about 1 to about 2 vol. %; an aggregate in an amount ranging from about 50 to about 80 vol. %, wherein the aggregates comprises siliceous aggregate and optionally carbonate aggregate; and a cementitious material in an amount from about 12 to about 20 vol. %, wherein the cementitious material comprises a combination of about 70 to about 85 vol. % of Portland cement and about 15 to about vol. % of silica fume, wherein all volume percentages unless otherwise indicated are based on the total volume of the concrete material.

The invention provides a hydration heat in-situ self-foaming light composite board and a preparation method thereof. The light composite board is prepared from the following raw materials: an inorganic cementing material, expanded polystyrene particles and an active siliceous material, wherein the inorganic cementing material comprises quick lime. According to the preparation method, hydration heat released in the hydration process of quick lime is used as an endogenous heat source to induce expanded polystyrene particles to generate in-situ expansion foaming in a system, and meanwhile, a high-alkalinity environment is formed to promote cementitious materials such as silicon hydrochloric acid cement and active siliceous materials to generate inorganic gel on the surfaces of the expanded polystyrene particles; and a composite interface structure wrapped by inorganic gel is formed, so that the light weight of the board is reduced, the synergism and unification of the light structure, the mechanical property and the fireproof property are realized, and the organic-inorganic interface stability and the structural integrity are improved.

The application relates to a preparation method of silica gel, which extracts siliceous elements from waste concrete rich in SiO2, Al2O3 and other components to prepare inorganic silica gel, and comprises the following steps: crushing, calcining, peeling, ball milling, preparation of a silicon-containing mixture, sol-gel, centrifugation, drying and the like; the application rationally utilizes the component characteristics of the waste concrete block, and prepares inorganic silica gel by taking the separated old hardened cement stone as a silicon source, has the advantages of simple process, low synthesis temperature, low energy consumption, green environmental protection, and the prepared inorganic silica gel has the advantages of large specific surface area and uniform pore structure; the method saves the production cost, effectively improves the economic added value and utilization rate of the waste concrete and the old hardened cement stone, avoids land resource occupation and environmental pollution, and has important environmental protection significance and application value.

The invention provides an insulation board and a raw material composition, a preparation method and application thereof. The insulation board raw material composition comprises a first component and a second component, the first component comprises polyol and isocyanate, and the second component comprises siliceous hollow microspheres, a siliceous substance and a calcareous substance; the calcium substance comprises calcium oxide and / or calcium hydroxide; the content of the siliceous hollow microbeads is 30%-90%; the particle size of the siliceous hollow microbeads is 10 to 150 meshes; the mass ratio of the first component to the second component is (2-18): (82-98). The insulation board prepared from the insulation board raw material composition meets the requirement of light weight, has excellent thermal insulation performance, fireproof performance and physical strength (compression strength and tensile strength), and has excellent comprehensive performance; in addition, the durability of the obtained insulation board is good.

This invention belongs to the field of coatings and coating systems, and discloses a two-component coating: Component A comprises 5-20 parts of organosilicon-modified diol oligomer, 10-30 parts of polyester diol, 0.1-1 parts of catalyst, 5-15 parts of boron-containing flame-retardant filler, 5-10 parts of ceramic filler, and 20-60 parts of solvent; the boron flame retardant in the boron-containing flame retardant filler is one or more of zinc borate, borax, sodium borate, calcium borate, triphenyl borate, and tributyl borate; the ceramic filler is aluminum dihydrogen phosphate and silica powder; Component B comprises 50-90 parts of diisocyanate and 10-40 parts of polyisocyanate. By mixing Component A and Component B in a weight ratio of 100:5-15 and spraying multiple times onto the substrate surface according to a spray-drying process, a flexible ablation-type thermal protective coating can be obtained. This thermal protective coating can form a coating ablation product containing a borosilicate glass phase within 2 minutes under high-temperature ablation at temperatures above 1000°C. Such a flexible ablation-type thermal protective coating combines the normal flexibility and toughness of the coating with the strong mechanical properties of the coating ablation products.

The invention discloses a preparation method of a chromium melt adhesive multifunctional adhesive, relates to the field of adhesives, and aims to solve the problems that in the prior art, an organic adhesive is poor in environmental protection performance, and an inorganic adhesive is poor in viscosity, flowability and permeability. The soaking speed can be increased by heating and adding the penetrating agent, and the bonding strength of the adhesive can be improved by adding the coupling agent. According to the method, the raw material cost is reduced, meanwhile, sufficient dissolution and uniform reaction of effective substances are ensured, and the prepared adhesive has high bonding strength, has the advantages of being low in raw material cost, sufficient in reaction and good in environmental protection property due to the fact that the adhesive does not contain organic volatile substances, and is low in viscosity and good in fluidity and permeability.

The invention discloses a preparation method of a high-strength heavy metal cured geopolymer based on lead-zinc tailings, and belongs to the technical field of solid waste resource utilization and heavy metal pollution treatment. The lead-zinc tailings, the fly ash, the diatomite and the alkali activator are used as raw materials, and the three action mechanisms of mesoporous adsorption-chemical bonding-structure enhancement of the diatomite are utilized, so that the curing efficiency and stability of heavy metal residues contained in the lead-zinc tailings are improved, and the risk to the ecological environment is greatly reduced; the fly ash is used as a core aluminum-silicon raw material, is rich in active SiO2 and Al2O3, is dissolved under the action of alkali to generate a geopolymer gel skeleton, and is a main source of strength; the lead-zinc tailings serve as an auxiliary silicon-aluminum source and aggregate, part of active ingredients of the lead-zinc tailings participate in the reaction, meanwhile, unreacted particles play a role in filling micro aggregate, and particle composition is optimized; and the alkali activator provides a high-alkalinity environment, aluminosilicate active components in other raw materials are dissolved, and finally the high-strength geopolymer is generated through an alkali excitation reaction.

The invention relates to a siliceous furnace lining material for a smelting environment with a high scrap ratio and a preparation method of the siliceous furnace lining material. The siliceous furnace lining material comprises the following components in parts by mass: 30-40 parts of selected microcrystalline silica tailings, 30-40 parts of fused quartz, 20-35 parts of spherical zirconium composite silica powder and 1-2 parts of a sintering aid. Wherein the SiO2 content of the selected microcrystalline silica tailings is greater than or equal to 99.5%. According to the present invention, the 99.5% selected microcrystalline silica tailings are adopted as the aggregate, such that the impurity reaction sites can be effectively reduced, the refractoriness can be increased to more than or equal to 1720 DEG C, and the spherical zirconium composite silica micro-powder is adopted as the matrix so as to effectively inhibit the cracking of the furnace lining and improve the fluidity of the slurry; boric acid in the sintering aid can promote low-temperature sintering to form a glass-phase combined phase. According to the siliceous furnace lining material for the smelting environment with the high scrap ratio, the sintering layer is specifically composed of the cristobalite phase and the silicon zirconium glass phase, and the siliceous furnace lining of an intermediate frequency furnace can be better protected.

Disclosed herein are methods and kits for purifying therapeutic-grade plasmid DNA using magnetic particles. In particular, the technology of the present disclosure relates to methods and kits for purifying therapeutic-grade plasmid DNA at a high degree of purity using magnetic particles with a siliceous oxide surface layer and a superparamagnetic core.

This invention relates to a multifunctional inorganic carbon-fixing coating, its preparation method, and the coating itself. By weight, the coating raw materials include 70-140 parts of carbon-cured composite material, 14-100 parts of deionized water, 10-70 parts of modified silica sol, and 1-14 parts of organic emulsion. The carbon-cured composite material is obtained by calcining a mixture of calcareous, siliceous, aluminous, and titanium raw materials. This invention, by incorporating calcareous, siliceous, aluminous, and titanium raw materials, prepares a carbon-cured composite material comprising multiphase minerals. This composite material is then combined with modified silica sol and organic emulsion to form an inorganic carbon-fixing coating. The multiphase minerals improve wear resistance and possess a high band gap and high refractive index. The modified silica sol and organic emulsion synergistically enhance the coating's cohesion. The inorganic carbon-fixing coating obtained using this invention exhibits excellent wear resistance, washability, and solar radiation reflection, as well as high adhesive strength.

The utility model belongs to the technical field of phosphorus chemical industry, and particularly relates to a semi-hydrated phosphogypsum purification system and a semi-hydrated wet-process phosphoric acid production system, which can be used for purifying wet-process phosphoric acid semi-hydrated phosphogypsum. The purification system comprises a reactor, flotation devices, gravity separation devices, a high-frequency screen and a filter pressing module, the reactor is provided with a semi-hydrated phosphogypsum inlet and a water inlet, the reactor is connected with N flotation devices connected in series, M gravity separation devices connected in series are connected behind the flotation devices, the gravity separation devices are all connected with the high-frequency screen, and the high-frequency screen is connected with the filter pressing module; n is an integer greater than or equal to 2, and M is an integer greater than or equal to 2. Impurities such as phosphorus, fluorine and siliceous are effectively separated from semi-hydrated phosphogypsum in the reactor, and flotation, gravity separation, high-frequency screening and filter pressing washing are combined for impurity removal, so that the impurities can be effectively removed, and the phosphogypsum with relatively high purity is obtained; meanwhile, the stages of flotation and gravity separation can be selected according to downstream application scenes, the purification yield, cost and purity are balanced, and the application range and field of phosphogypsum are widened.

The invention provides a method for preparing iron and a cementing material through electrolysis of molten steel slag, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: mixing molten steel slag and a siliceous modifier to obtain mixed molten slag; the mixed slag is subjected to electrolytic reduction, and modified slag with reconstructed components and metal iron are obtained; and mixing the modified slag with the reconstructed components with calcium oxide to obtain silicate slag, then cooling to room temperature, and recycling cooling heat for preheating the siliceous modifier and calcium oxide to obtain the silicate cementing material. According to the method, the iron element is directly recovered from the molten steel slag through an electrochemical reduction method, so that the reduction efficiency is high, the addition of other reagents can be reduced, and the carbon emission of iron and steel enterprises is reduced; the modified slag obtained after component reconstruction and calcium oxide are mixed and cooled to the room temperature, the silicate cementing material is directly prepared, recycled heat is used for preheating raw materials, carbon emission reduction in the ferrous metallurgy industry is achieved, and energy consumption of iron and steel enterprises is reduced.

This invention discloses a high-density, high-thermal-conductivity silica refractory slurry and its preparation method. The refractory slurry consists of dry-based powder and additives. The dry-based powder includes: 65-75% silica, 15-20% micron-sized silica clay, 10-15% amorphous fused silica powder (containing micron-sized and nano-sized powders in a 2:1 mass ratio), and 2-3% borosilicate glass powder. The additives include silica sol and a high molecular weight block copolymer dispersant. The silica sol is added at 20-30% of the total mass of the dry-based powder, and the high molecular weight block copolymer dispersant is added at 2.5% of the silica sol mass. During preparation, the silica is first calcined at 600℃, then the silica sol and high molecular weight block copolymer dispersant are mixed, and the micron-sized powder and calcined silica are added sequentially and mixed thoroughly. The refractory mortar of this invention has a porosity of ≤25% after drying, a thermal conductivity of 2.2-2.6 W / (m·K), and a refractoriness of ≥1620℃. It has high density, high thermal conductivity, excellent high-temperature performance, and wide temperature range adaptability (from room temperature to 1750℃). It is suitable for the construction and repair of siliceous refractory materials and high-density siliceous ceramics.

To provide a polysiloxane composition capable of suppressing the generation of voids when forming a siliceous film. A polysiloxane composition comprising a polysiloxane; a dicarboxylic acid having the first acid dissociation constant pKa1 of 4.0 or less and represented by the following formula (II): HOOC-L-COOH (II) (wherein, L is a single bond, a hydroxy-substituted or amino-substituted alkylene having 1 to 6 carbon atoms, a substituted or unsubstituted alkenylene having 2 to 4 carbon atoms, a substituted or unsubstituted alkynylene having 2 to 4 carbon atoms, or a substituted or unsubstituted arylene having 6 to 10 carbon atoms); and a solvent.

The application discloses a wet siliceous mud, a preparation method and application thereof, and belongs to the technical field of mud. The wet siliceous mud comprises the following components in mass fraction: 30-52% of silica sand, 7-16% of calcined quartz, 6-7% of silica brick fine powder, 4-6% of silica micro powder, 1-2% of dextrin, 1-2% of sodium dihydrogen phosphate, 0.5% of quaternary ammonium salt preservative, 0.5-1% of BIT and 25-30% of water, and the sum of the mass of the components is 100%. The siliceous mud has excellent performance and long holding time.

The present invention discloses a silicon insulation barrel of a vertical oxidation furnace, comprising a base, a top seat and at least three groove rods vertically installed between the base and the top seat, a plurality of fins are arranged between the base and the top seat, and a plurality of accommodating grooves are provided on the groove rods along the height direction of the insulation barrel, wherein an opening for inserting the fins into the accommodating grooves is provided between two groove rods, at least one groove rod is provided with a drainage groove connecting the plurality of accommodating grooves, a groove rod for installing the drainage groove is provided on the base, a water collecting groove for receiving water droplets is provided on the supporting part, the water collecting groove is connected to the outside world and is provided with a drainage pipe, the fins are plugged into the accommodating groove through the opening, so as to facilitate the installation of the fins, and the drainage groove on the groove rod is used to drain the water droplets condensed on the fins into the water collecting groove of the supporting part, and then the water is discharged outward through the drainage pipe, so as to prevent the water droplets from passing through the base and the process door and contacting the components, thereby causing damage to the components, thereby achieving protection of the components.

The present invention relates to a method for manufacturing a siliceous mixed material, the method comprising the steps of: preparing a residue of an ore from which lithium has been extracted and calcium sulfate has been removed; and drying the residue of the ore from which lithium has been extracted and calcium sulfate has been removed.

The invention relates to the technical field of aluminum composite plates, in particular to an A1-grade fireproof and decorative aluminum composite plate and a manufacturing process thereof, and the A1-grade fireproof and decorative aluminum composite plate sequentially comprises the following raw materials from inside to outside: an inner-layer aluminum plate, a first polymeric membrane, a calcium silicate plate, a second polymeric membrane and an outer-layer aluminum plate. According to the invention, the polymer film is subjected to blending modification through the ethylene-butyl acrylate copolymer and the low-density polyethylene, and is matched with the halogen-free flame retardant coated with the silane coupling agent, so that efficient bonding and flame-retardant synergy among the layers are realized, and the interface bonding strength of the composite board is enhanced; the calcium silicate board is based on siliceous and calcareous raw materials, and silane modified glass fibers and nano magnesium hydroxide are introduced, so that excellent fire resistance is provided, and the composite board structure is endowed with supporting force; the modified outer-layer aluminum plate is subjected to micro-arc oxidation and graphene modified PVDF coating composite treatment, on one hand, the bonding stability of the modified outer-layer aluminum plate and a polymeric membrane is improved, and on the other hand, the decoration performance, the weather resistance and the corrosion resistance are remarkably improved.

The present disclosure relates to a curable composition comprising: (A) a polyolefin; (B) siliceous earth; (C) a crosslinking agent; (D) a crosslinking co-agent; and, optionally, (E) an additive component, where the curable composition demonstrates improved electrical properties. The present disclosure further relates to a crosslinked polymer composition that is the reaction product of the curable composition, where improved electrical properties are demonstrated as well.