20results about How to "Reduce silicon content" patented technology

The invention provides a modified silicone oil agent with a comb-shaped structure as well as a preparation method and application thereof, the oil agent comprises an amino modified silicone oil emulsion and an epoxy modified silicone oil emulsion, and the mass ratio of the amino modified silicone oil emulsion to the epoxy modified silicone oil emulsion is 1: (0.5-1.5); the amino modified silicone oil emulsion and the epoxy group-containing modified silicone oil emulsion have comb-shaped structures, main chains of the amino modified silicone oil and the epoxy group-containing modified silicone oil are acrylate polymers, and branch chains are amino short silane chains or epoxy group-containing short silane chains; the preparation method of the oiling agent comprises the following steps: respectively preparing amino short-chain silicone oil and epoxy group-containing short-chain silicone oil, and then respectively synthesizing amino modified silicone oil emulsion and epoxy group-containing modified silicone oil emulsion. The acrylate polymer is introduced, the content of organic silicon is reduced, the viscosity of the oiling agent is small, carbon fibers are conveniently oiled, a protective film is formed on the fibers, friction and abrasion between the fibers are prevented, and therefore the surface defects of the carbon fibers are reduced.

The invention provides an oiling agent for carbon fibers as well as a preparation method and application thereof, the oiling agent comprises an amino modified silicone oil emulsion and an epoxy modified silicone oil emulsion, and the mass ratio of the amino modified silicone oil emulsion to the epoxy modified silicone oil emulsion is 1: (0.5-1.5); the amino modified silicone oil and the epoxy group-containing modified silicone oil are comb-shaped in structure, main chains of the amino modified silicone oil and the epoxy group-containing modified silicone oil are acrylate polymers, and branch chains of the amino modified silicone oil and the epoxy group-containing modified silicone oil are amino short silane chains or epoxy group-containing short silane chains; the preparation method of the oiling agent comprises the following steps: firstly, preparing an acrylate prepolymer by a solvent polymerization method, then respectively preparing amino modified silicone oil and epoxy group-containing modified silicone oil, and finally respectively carrying out water emulsification. The acrylate polymer is introduced into the oiling agent provided by the invention, so that the silicon content is reduced, the viscosity of the oiling agent is reduced, carbon fibers are conveniently oiled, a protective film is formed on the fibers, friction and abrasion between the fibers are prevented, and the surface defects of the carbon fibers are reduced.

This invention belongs to the field of metal purification technology and discloses a method for preparing high-purity indium with low silicon content, comprising the following steps: Step 1: Place the indium raw material into a hydrogenation furnace and evacuate to a vacuum degree of 5*10 ‑3 Pa-8*10 ‑3 Step 2: Purge with inert gas to atmospheric pressure and maintain the pressure for 30 minutes; Step 3: Replace the inert gas with hydrogen gas, turn on the heater to raise the temperature to 400-600℃, and maintain the temperature for 1-2 hours to obtain the low-silicon content high-purity indium. This invention discloses a method for preparing low-silicon content high-purity indium, which can reduce the silicon content in high-purity indium to <10 ppbw, effectively improving the performance of high-purity indium.

The invention relates to the technical field of precious metal metallurgy, and discloses a high-density iridium ingot sedimentation type smelting process which comprises the following steps: preparing a water-cooled copper crucible with a zirconium oxide inner wall coating; iridium powder and calcium oxide powder are mixed and put into a crucible; performing induction heating in a vacuum environment until the raw materials are molten; protective gas is inflated, periodic variable-pressure oscillation operation is applied under the condition that the temperature of the melt is kept, and slag crust on the surface of the melt is destroyed through pressure fluctuation and deep gas is promoted to be exhausted; after oscillation is stopped, the melt is left to stand, and a slag system floats upwards and is separated; and establishing a bottom-to-top temperature gradient to control directional solidification of the melt. According to the invention, oxide hard shells are destroyed through a variable-pressure oscillation mechanism, and efficient degassing and impurity removal are realized by cooperating with calcium oxide slagging; the zirconia coating effectively prevents the crucible material from being polluted; the directional solidification and hot isostatic pressing process eliminates internal shrinkage cavities and looseness. According to the process, the impurity content in the iridium ingot is remarkably reduced, and the purity and compactness of the material are improved.

The invention discloses a comprehensive utilization method of bamboos, and belongs to the technical field of comprehensive utilization of bamboo products. According to the silicon content difference of different parts of the bamboos, the raw bamboos are separated into the bamboo green layers and the bamboo flesh for graded utilization, the bamboo green layers are used for producing high-added-value products, the bamboo flesh is used for pulping and papermaking, and efficient comprehensive utilization of the low-carbon high-silicon bamboos is achieved. Graded utilization is achieved based on natural differences of silicon contents of all parts of bamboo wood, the silicon content of a bamboo green layer is far higher than that of bamboo pulp, the bamboo green layer is rich in active ingredients, 62% or above of silicon in pulping bamboo chips can be removed from the source after stripping, the silicon content of pulping black liquor is reduced by 53% or above, and the pulping quality is improved. The core problems of equipment scaling, alkali recovery rate reduction and the like caused by silicon in the papermaking process are thoroughly solved, meanwhile, high-added-value products such as bamboo-based composite materials and functional drinks can be specifically prepared through the bamboo green layer, and bamboo meat meets the pulping and papermaking requirements due to rich fibers and low silicon content; and finally, high-value comprehensive utilization with low carbon, environmental protection and high economic benefit of the bamboo wood is achieved.

The invention relates to a preparation process of high-strength, high-wear-resistance and high-toughness hot work die steel for an extrusion die, which is characterized in that on the basis of common hot work die steel H13, component design is carried out by adopting a component design concept of high C, low Si, high Mo and low V, and special smelting, forging and heat treatment processes are added. The prepared product has excellent purity, structure uniformity and mechanical property, and a mold made of the material can better meet the requirements of modern industrial production for high-end molds. The process route comprises the steps of electric furnace smelting, ladle refining furnace refining, circulating vacuum refining furnace refining, electrode blank continuous casting, electrode blank annealing, electroslag remelting, forging, pretreatment after forging and solid solution and spheroidizing treatment. The invention further relates to the high-strength, high-wear-resistance and high-toughness hot work die steel for the extrusion die.

The invention relates to a homogenized diamond / silicon carbide composite material as well as a preparation method and application thereof, in particular to the homogenized diamond / silicon carbide composite material which is based on a solvothermal process and is prepared by the following steps: firstly, dipping diamond particles in a precursor reaction solution to obtain a blend of diamond and the precursor reaction solution; and secondly, heating the blend for gelation-curing, and then performing carbonization and siliconizing to obtain the homogenized diamond / silicon carbide composite material. The preparation method provided by the invention solves the problems of non-uniform distribution of silicon carbide and silicon, poor comprehensive performance and the like in the prior art.

A high-silicon copper-containing calcine leaching residue resource utilization method, comprising: mixing high-silicon copper-containing calcine leaching residue with solid strong alkali, roasting at 140-160 DEG C, obtaining roasting alkali residue; the roasting alkali residue is added with calcium oxide and water to carry out concentrated alkali leaching, solid-liquid separation, obtaining alkali leaching residue and alkali leaching liquid; the alkali leaching liquid is added with a sulfidation agent to precipitate copper, obtaining copper precipitation residue and copper precipitation liquid; the copper precipitation liquid is added with calcium oxide to remove silicon, obtaining silicon precipitation residue and silicon removal liquid; copper is enriched in the copper precipitation residue; the "low-temperature roasting + concentrated alkali leaching" process of the application can effectively destroy the stable structure of high-silicon copper-containing calcine leaching residue, so that the copper wrapped by silicon is exposed, the chemical reaction of the high-silicon copper-containing calcine leaching residue leaching process is significantly strengthened, and the copper leaching rate can be greatly improved; the roasting temperature of the application is only 140-160 DEG C, which is much lower than the general alkali roasting temperature, the energy consumption is lower, the possible high-temperature injury is reduced, and the safety is higher.

This invention belongs to the field of lepidolite tailings technology, and particularly relates to a process for reducing the silicon content in feldspar based on lepidolite tailings. Specifically, it includes the following steps: pretreatment of lepidolite tailings; preparation of soluble starch cross-linked microspheres; preparation of quartz inhibitors; preparation of dicarboxylic acid anionic polyacrylamide; preparation of feldspar inhibitors; addition of quartz inhibitors under neutral conditions to float feldspar; and addition of feldspar inhibitors under alkaline conditions to float quartz. By adding quartz inhibitors to the slurry under neutral conditions, the soluble starch cross-linked microspheres can hinder the adsorption of anionic collectors on the quartz surface, thereby effectively inhibiting quartz and reducing the silicon content in the floated feldspar. By adding feldspar inhibitors to the slurry under alkaline conditions, pectin and dicarboxylic acid anionic polyacrylamide can hinder the effect of anionic collectors on feldspar, thereby effectively inhibiting feldspar and further reducing the silicon content in the feldspar.

The invention relates to the technical field of steelmaking production, in particular to a method for reducing steelmaking production cost by adding iron-containing miscellaneous materials, which comprises the following steps: step 1, arranging a blanking device above a transported iron ladle, and placing the iron-containing miscellaneous materials in the blanking device; 2, materials arranged in the discharging device are iron-containing miscellaneous materials with the iron content being 40%-92%; step 3, adding iron-containing miscellaneous materials with corresponding mass according to the temperature of the molten iron in the iron ladle, wherein the iron-containing miscellaneous materials contain fly ash materials; according to the method, surplus heat in high-iron-consumption production can be effectively utilized, the purity of molten steel is controlled, the oxygen consumption and the iron consumption are reduced, and the problems existing in the background technology are solved.

The invention belongs to the technical field of environmental functional materials and sewage treatment, and particularly relates to a semi-permanent filamentous sulfur autotrophic filler for micro-plastic end treatment as well as a preparation method and application of the semi-permanent filamentous sulfur autotrophic filler. The invention provides a semi-permanent filamentous sulfur autotrophic filler. The semi-permanent filamentous sulfur autotrophic filler is prepared from the following raw materials: sodium sulfide, humic acid, Portland cement, slaked lime, pyrite, municipal sewage plant sludge, chitosan, aluminum powder and water. The semi-permanent filamentous sulfur autotrophic filler has the characteristic of light weight, also retains enough strength, and overcomes the problem of insufficient strength of the existing filler. Besides, the semi-permanent filamentous sulfur autotrophic filler can further accelerate the domestication speed and enrichment speed of sludge and promote rapid growth of filamentous sulfur autotrophic bacteria, so that the interception capacity of the filamentous sulfur autotrophic bacteria on micro-plastics is improved, the denitrification capacity of microorganisms is further improved, a large amount of residual fine micro-plastics in municipal sewage plants can be effectively removed, and the service life of the filamentous sulfur autotrophic filler is prolonged. The application prospect is wide.

The utility model discloses an adsorption system for removing boron from trichlorosilane. The adsorption system comprises a silicon tetrachloride raw material tank, a feeding tank and an adsorption column, the silicon tetrachloride raw material tank, the feeding tank and the adsorption column are sequentially communicated through a pipeline; a pressure pump is arranged on a pipeline between the silicon tetrachloride raw material tank and the feeding tank, and is used for conveying silicon tetrachloride in the silicon tetrachloride raw material tank into the feeding tank; the feeding tank is externally connected with a nitrogen tank through a pipeline, and the nitrogen tank conveys nitrogen to the feeding tank; the feeding tank is used for mixing the nitrogen and the silicon tetrachloride and then conveying the mixture to the adsorption column; the adsorption column is provided with a tail gas discharge port, and the tail gas discharge port is communicated with the tail gas treatment device through a pipeline; the gel is activated in a nitrogen-assisted blowing automatic intermittent feeding manner, so that the temperature of the adsorption column is controlled, and the danger is greatly reduced.

The invention provides a method and a system for recycling electrolytic nickel anolyte, and relates to the field of hydrometallurgy recycling. According to the method for recycling the electrolytic nickel anolyte, nickel ions are separated from silicon and hydrogen ions in the electrolytic nickel anolyte through the acid retardant resin containing the amino active group, nickel acid separation is achieved, the silicon content in the solution is reduced, the purity of the solution is improved, and consumption of a subsequent silicon removal reagent is reduced; afterwards, the liquid after adsorption is subjected to a first reverse osmosis process, and a first reverse osmosis concentrated phase, namely, nickel cathode liquid, is obtained. Due to the reduction of the silicon content in the liquid after adsorption, the formation of a silicon membrane which is difficult to clean on the reverse osmosis membrane is inhibited, the membrane flux of the reverse osmosis membrane is improved, and the use of a membrane cleaning agent is reduced. Therefore, through the acid retardant resin process and the first reverse osmosis membrane process in the embodiment of the invention, the nickel cathode liquor with higher purity is obtained, the use of a silicon removal reagent and a membrane cleaning agent is effectively reduced, and the economical efficiency is good.

The invention relates to the technical field of iron and steel smelting, in particular to a high-iron low-silicon oxidized pellet and a preparation method thereof.The preparation method comprises the following steps that a slurry-based binder is sprayed into vanadium-titanium magnetite concentrate, the mixture is strongly ground and then fed into a strong mixing machine to be fully and evenly scattered, and a mixture is obtained; pelletizing the mixed material; sequentially drying, preheating, roasting and cooling the made green pellets to obtain oxidized pellets; wherein the usage amount of the slurry-based binder is 1%-2% of the mass of the vanadium-titanium magnetite concentrate. The slurry-based binder is adopted to replace bentonite to prepare the high-iron low-silicon oxidized pellets, so that the physical properties, such as compressive strength and wear resistance, of the pellets are improved, the metallurgical properties, such as reducibility and softening temperature, of the pellets are improved, and the performance of the pellets in blast furnace smelting is improved. The problems that in the actual production of oxidized pellets, a high-viscosity fluid binder is small in dosage, non-uniform in addition, poor in dispersity, difficult to control in the pelletizing process, poor in strength of preheated pellets and the like are solved.

The utility model provides a PET (Polyethylene Terephthalate) reticulated release film, which belongs to the technical field of release films and comprises a reticulated release film body, the reticulated release film body comprises a polyethylene glycol terephthalate base material, a glass fiber layer is arranged on the upper surface of the polyethylene glycol terephthalate base material, the upper side of the glass fiber layer is an inclined surface, and the lower side of the glass fiber layer is an inclined surface. According to the release film, in the process of using the release film, due to the fact that the upper surface layer of the release film is the inclined plane, when the release film is horizontally placed, if the temperature is suddenly changed or water is sprayed on the reticulate pattern, the area coverage rate of the small water drops can be reduced under the influence of factors such as self-gravity and low friction of the small water drops, and the water drops are prevented from falling off. And therefore, a user can conveniently clean the inclined plane, the inclined plane is easy to machine and form, and the cost is low.

The method for improving the content of vanadium in converter vanadium slag disclosed by the embodiment of the application comprises the following steps: S1, vanadium-containing molten iron is blown oxygen smelted in a converter by adding a dephosphorizing agent and a cooling agent to obtain molten vanadium slag and semi-steel; wherein the P content in the semi-steel is lower than 0.005wt%; the CaO content in the molten vanadium slag is greater than 5wt%, and the P content is greater than 0.05wt%; S2, a high-valence oxide-containing material is added into the obtained molten vanadium slag, CO2-O2 gas is introduced for stirring, and reaction is carried out at a set temperature; during the reaction, the reaction process is synergistically strengthened by using ultrasound, microwave and a magnetic field, and a magnetic vanadium spinel and a molten silicate mixture are obtained by the reaction; the content of the magnetic solid vanadium spinel is 20-100wt%; S3, the magnetic vanadium spinel and the molten silicate mixture are separated under the condition of a magnetic field to obtain the magnetic vanadium spinel and the molten silicate, respectively.

The present invention relates to a homogenized diamond / silicon carbide composite material and a preparation method and application thereof, and more specifically, it relates to a homogenized diamond / silicon carbide composite material, based on a solvent thermal process, firstly, diamond particles are impregnated in a precursor reaction solution to obtain a blend of diamond and the precursor reaction solution, then the blend is heated for gel-curing, and then carbonized and siliconized to obtain a homogenized diamond / silicon carbide composite material. The preparation method of the present invention solves the problems of uneven distribution of silicon carbide and silicon and poor comprehensive performance in the prior art.

This application provides a silicon-carbon anode material, its preparation method, an anode sheet, and a battery. The silicon-carbon anode material includes a silicon-carbon matrix and a carbon coating layer covering at least a portion of the surface of the silicon-carbon matrix. The silicon-carbon matrix comprises porous carbon and silicon particles filling the pores of the porous carbon. In the silicon-carbon matrix, the mass percentage of the silicon particles increases radially from the inside out; and the average particle size of the silicon particles decreases radially from the inside out. This application can obtain a silicon-carbon anode material with both excellent electrochemical performance and low expansion rate.

The invention discloses a method for high value-added utilization of graphite negative electrode waste, and belongs to the technical field of solid waste recycling. It mainly includes processes such as high-temperature acid leaching, high-temperature calcination, wet material ball milling, spray drying and secondary calcination. The graphite waste is first subjected to sulfuric acid leaching and high-temperature calcination to obtain high-purity regenerated graphite; then a certain proportion of silicon powder, PVP powder, alcohol reagent and NMP reagent are added respectively for two times of ball milling to obtain slurry. Subsequently, the slurry is subjected to a spray-pyrolysis drying process to first obtain a silicon-carbon material precursor, and finally a spherical silicon-carbon material product is obtained after secondary calcination. In addition, the NMP and alcohol reagent in the slurry can also be recycled, realizing a closed-loop cycle of the entire process. The regenerated graphite obtained by this process has high purity; and the silicon-carbon material product with uniform size and high sphericity is subsequently prepared, showing excellent electrochemical properties. The entire process flow is green and environmentally friendly, and meets the requirements of clean production.

The invention relates to a pole piece and a cylindrical lithium ion battery. The pole piece comprises a current collector and active substance layers positioned on two sides of the current collector; in the length direction of the pole piece, the content of at least one active substance in the active substance layer is gradually reduced from the roll head to the roll tail of the pole piece. The expansion difference of the inner and outer ring pole pieces is improved and the battery performance is improved by regulating and controlling the formulas of the upper and lower slurry layers and the coating thickness in the length direction.