131results about How to "Reduce aluminum content" patented technology

The invention relates to a preparation method of an aluminum-doped material of a cathode of a lithium ion battery with a solid phase process. The preparation method comprises the following steps: controlling certain reaction conditions to prepare a precursor of a nickel, cobalt and/or manganese hydroxide; uniformly mixing the precursor with a lithium salt and a nanometer aluminum compound; and carrying out high temperature processing for a certain period of time in an air or oxygen atmosphere, cooling, and crushing to obtain the aluminum-doped material of the cathode of the lithium ion battery with the solid phase process. The aluminum-doped material of the cathode of the lithium ion battery with the solid phase process which can substantially improve the safety performance and the cycle characteristic of the lithium ion battery at a high temperature can be applied to power batteries.

The invention relates to fluoride-free low-acid zwitterion quartz sand reverse flotation process, which is characterized by comprising following steps: (1) pretreatment; (2) flotation: adjusting the pH (potential of hydrogen) value of ore pulp to 4-5 by sulfuric acid, performing air agitation, adding 40g/t-80g/t of positive ion collecting agent and 60g/t-75g/t of foaming agent, stirring and removing foams in primary flotation; and adjusting the pH value of the ore pulp to 9-10 by 200g/t-300g/t of sodium carbonate, performing air agitation, adding 80g/t-150g/t of negative ion collecting agent,then adding 60g/t-75g/t of foaming agent, stirring and removing foams in secondary floatation; and (3) washing ores in a flotation tank by water until the ores are neutral, and drying the ores to obtain quartz sand concentrates. The flotation collecting agents are fine in selectivity, the process is simple, cost is low, the purity of the quartz sand is high, the content of iron and aluminum impurities is low, and the problem that traditional fluoride and high-acid process damages equipment and environments is avoided in a flotation process.

The invention provides an annealing-free low-carbon steel coil rod and a production method thereof. The annealing-free low-carbon steel coil rod comprises the following chemical components: 0.04-0.10% of C, 0.01-0.10% of Si, 0.20-0.35% of Mn, at most 0.015% of P, at most 0.010% of S, at most 0.0060% of N, 0.0030-0.0060% of total oxygen, 0.0020-0.0080% of total aluminum, at most 0.1% of inevitable impurity and the balance of iron. The manufacturing method comprises the steps of converter smelting, LF (ladle furnace) refining, continuous casting and rolling, wherein incomplete deoxidation occurs at the tapping side of a converter, the aluminum content of molten steel is reduced by using the high oxygen activity of the molten steel, the carbonization of the molten steel in the refining process is inhibited, bloom protection casting is performed, the temperature for double module input is controlled at 900-920 DEG C, the loop laying temperature is 870-900 DEG C, the speed of a roller way is 0.2-0.4 m/s, and a blower is closed. Thus, the vacuum treatment procedure is omitted, the technical process is shortened, the production cost is lowered, and the requirement of users for canceling the annealing technique in the drawing process is satisfied. For the annealing-free low-carbon steel coil rod produced according to the components and the production method provided by the invention, the grain size is controlled at 20-30 um, the tensile strength is no more than 350 MPa, and the reduction of area is no less than 75%.

The invention relates to a method for preparing high-purity vanadium pentoxide by use of a stone coal one-step method. The technical solution is as follows: a fluidized bed furnace for one-step roasting of stone coal is adopted to perform one-step fluidized bed roasting on the stone coal; roasted materials are leached in three segments, final pickling slurry is subjected to primary separation so as to obtain final pickle liquor, secondary overflow is returned to be subjected to primary size mixing, and tertiary overflow is returned to be subjected to secondary size mixing; the pH value of the final pickle liquor is regulated, and slags obtained after regulation are returned to a segment III so as to be leached; the regulated pickle liquor is crystallized to obtain a potassium alum byproduct; after crystallization, the liquid is subjected to reduction and precipitation-based impurity removal, and filter residues are dried to obtained a ferrous oxalate byproduct; after impurity removal, pH value regulation is performed on the liquid by use of weak acid salt, then counter-current extraction is performed on the liquid, and extraction raffinate is returned to be subjected to tertiary size mixing; after being washed, the loaded organic phase is subjected to countercurrent reverse extraction; a lean organic phase is regenerated and then is returned to be extracted; after a vanadium-rich solution is oxidized, urea is added, stirring is performed, the obtained molybdenum precipitation mother solution is returned to be subjected to primary size mixing, and ammonium polyorthovanadate is calcinated to prepare vanadium pentoxide. The method has the characteristics of short process flow, less pollution, low energy consumption, less chemical usage, high vanadium recovery rate and high product purity.

The invention discloses a zinc-based alloy used in steel hot dipping, and a preparation method thereof. According to the invention, a zinc ingot and Zn-Al interalloy are placed in a medium-frequency induction furnace; the materials are heated to a temperature of 720 DEG C, such that an alloy liquid is produced; a salt covering agent is added on the surface of the alloy liquid, and Al-Si interalloy is pressed into the alloy liquid; the mixture is smelted and well mixed by stirring; the temperature of the mixture is reduced to 650 DEG C, such that a fused alloy liquid is produced; Al-Mg interalloy and Al-La interalloy are respectively pressed into the fused alloy liquid, and the mixture is continuously stirred until uniform; the temperature is maintained for 30 minutes, and slag is fetched;and the material is cast into a metal mold, such that the zinc-based alloy used in steel hot dipping is obtained, wherein the alloy comprises elements of, by weight: 20 to 40% of Al, 0.5 to 3% of Si,0.5 to 3% of Mg, 0.05 to 1% of La, and balance of Zn. With the method, corrosion resistance of the alloy can be effectively improved, viscosity of alloy melt can be reduced, wettability of the alloy upon a steel substrate can be improved, grains of the alloy can be thinned, dissolubility of iron in a zinc tank can be continuously and effectively reduced, zinc slag production in the zinc tank can be reduced, and the zinc slag with a limited amount in the zinc tank can be converted from bottom slag into dross.

A tastable, moldable, and/or extrudable structure using a metallic primary alloy. One or more additives are added to the metallic primary alloy so that in situ galvanically-active reinforcement particles are formed in the melt or on cooling from the melt. The composite contains an optimal composition and morphology to achieve a specific galvanic corrosion rate in the entire composite. The in situ formed galvanically-active particles can be used to enhance mechanical properties of the composite, such as ductility and/or tensile strength. The final casting can also be enhanced by heat treatment, as well as deformation processing such as extrusion, forging, or rolling, to further improve the strength of the final composite over the as-cast material.

The invention discloses a treatment method for purifying a zinc pot in hot galvanizing production. A purification treatment process comprises the steps that hot galvanizing production is carried out while aluminium content of molten zinc is maintained to be 0.025-0.030wt% and scummings in the zinc pot are cleaned in a hot galvanizing production process. The treatment method for purifying the zinc pot in the hot galvanizing production has the advantages that generation of iron in the zinc pot is inhibited by increasing the aluminium content in the molten zinc from 0.18-0.20% at ordinary times to 0.025-0.030%, so as to improve zinc layer adhesiveness and glossiness of a galvanized plate, and quality of the galvanized plate is effectively improved; iron content in the zinc pot after being purified by adopting the treatment method is obviously reduced, and thus a foundation is laid for follow-up generation.

The invention provides a smelting method for metal chromium with low aluminum content. The smelting method comprises the following steps: mixing industrial dichromium trioxide, calcium oxide, aluminumoxide or magnesium oxide and sodium oxide according to the mass ratio of (1 to 5) to (0.01 to 0.1) to (6 to 9) to (0.01 to 0.4) by utilizing a mixer, so as to obtain a mixture A; mixing the industrial dichromium trioxide and carbon according to the mass ratio of 1 to (0.1 to 0.5) by utilizing the mixture, so as to obtain a mixture B; putting the mixture A into an electric furnace; adding the mixture B after the mixture A is completely melted; raising the smelting temperature of the electric furnace to be higher than 1750 DEG C, so as to completely melt the added materials; naturally cooling until the temperature is less than 100 DEG C and then discharging the materials out from the furnace; cleaning dreg on the surfaces to obtain a metal chromium block; and after crushing, packaging to obtain commodity metal chromium. The method provided by the invention has the advantages of low energy consumption and high product purity.

A harmless treatment method for aluminum ash comprises the following steps: (1) mixing the aluminum ash with water, performing stirring to form a slurry, and grading the slurry to obtain a fine particle slurry; or mixing the graded aluminum ash with water, and performing stirring for forming a slurry to obtain the fine particle slurry; (2) adding a leaching agent, and carrying out a leaching reaction to obtain a nonmetal slurry; and (3) carrying out ball-milling deamination on the oxidized slurry, and washing, filtering, washing and drying the deaminated slurry to obtain harmless aluminum ash.The method has the advantages of high safety coefficient in the production process, simplicity, low cost, and suitableness for industrial production; and the obtained harmless aluminum contains, by mass, 95% of Al2O3, 0.02% or below of aluminum nitride, 0.01% or less of metallic aluminum and 0.2% or less of salt, meets the bauxite ore standard of GB/T 24483-2009, and can be used as a raw materialof a water purifying agent, ceramic, glass, a refractory material, a building material or electrolytic aluminum.

The invention discloses a freeze-dried preparation of a vaccine containing an aluminum adjuvant, and a preparation method and application of the freeze-dried preparation. The aluminum salt vaccine freeze-dried preparation contains nanoparticles or microparticles formed by compounding anionic polymers or derivatives thereof and aluminum salt, a vaccine antigen, an adjuvant and a freeze-dried protective agent; and a freeze-drying method provided by the invention avoids the massive aggregation of aluminum hydroxide in the vaccine, and reduces the damage to the activity of the antigen. The stability of the vaccine in the freeze-drying process and the storage process can be improved; the vaccine can get rid of cold-chain transportation; the cost is reduced; energy is saved; and particularly, the technical problem that a low-temperature cold chain in a remote area is difficult to guarantee is solved.

Disclosed is a TiAl alloy for high-temperature applications which comprises not more than 43 at. % of Al, from 3 at. % to 8 at. % of Nb, from 0.2 at. % to 3 at. % of Mo and/or Mn, from 0.05 at. % to 0.5 at. % of B, from 0.1 at. % to 0.5 at. % of C, from 0.1 at. % to 0.5 at. % of Si and Ti as balance. Also disclosed is a process for producing a component made of this TiAl alloy and the use of corresponding TiAl alloys in components of flow machines at operating temperatures up to 850° C.

The invention discloses a titanium alloy for forging an aviation disc piece. The titanium alloy comprises the following components in percentage by weight: 5.20-5.80% of Al, 3.50-4.50% of Mo, 0.80-2.50% of Zr, 0.80-2.50% of Sn, 0.70-1.50% of W, 0.10-0.25% of Si, 0.05-0.10% of Fe, 0.15-0.20% of C, 0.10-0.20% of Cr, less than or equal to 0.15% of O, less than or equal to 0.04% of N, less than or equal to 0.012% of H, less than or equal to 0.10% of Cu and the balance of Ti.

The invention provides titanizing and aluminizing agents for a new reactor for producing sponge titanium and coating and permeating methods. Components of the aluminizing agent comprise aluminum powder, alumina and ammonium chloride; and components of the titanizing agent comprise titanium powder, alumina and ammonium chloride. The coating method comprises the following steps: coating the aluminizing agent on the external surface of the reactor, and coating the titanizing agent on the internal surface, wherein the total thickness of the aluminizing and titanizing coatings is 0.4 to 0.7 millimeter; and putting the coated reactor into heating equipment, degassing the reactor for 2 to 5 hours at the low temperature of between 150 and 300 DEG C, heating the reactor to between 650 and 1,100 DEG C under the protection of argon atmosphere, and preserving the heat for 4 to 10 hours. Through test, FeAl and Fe3A1 phases are mainly positioned on the external surface of steel in the method, and the content of aluminum is 18 to 55 weight percent. The method for aluminizing outside and titanizing inside at the same time controls the content of impurity iron in the sponge titanium to be lower than 0.02 percent while keeping the cost, improves the usage times of the reactor, and greatly reduces the production cost of the sponge titanium.

The invention belongs to the technical field of textiles, and particularly relates to a fire resistant viscose fiber and a preparation method thereof. The preparation method of the fire resistant viscose fiber includes the procedures of impregnation, aging, yellowing, dissolving, filtering, defoaming, spinning, washing and desulfurization. When any procedure from dissolving to spinning is performed, sodium silicate is added into viscose solution and uniformly mixed with the viscose solution. By the preparation method of the fire resistant viscose fiber, the viscose solution is more easily filtered, fire retardants are saved, and the fire resistance of the prepared viscose solution in filtration is good.

The invention relates to a high-temperature phase-change heat storage composite material and a preparation method thereof. According to the technical scheme, the method comprises the steps that ternary aluminum-based alloy powder is alternately washed with an acid solution and deionized water, dried in a protective atmosphere and placed in pressurized steam to be pretreated, and the pretreated ternary aluminum-based alloy powder is obtained; the pretreated ternary aluminum-based alloy powder is put into aluminum sol for vacuum impregnation, taken out, filtered, put into silica sol for vacuum impregnation, filtered, and taken out; the steps are repeated for 3-5 times according to an alternate impregnation method, and filtering and drying are performed to obtain the pre-coated ternary aluminum-based alloy powder; and the pre-coated ternary aluminum-based alloy powder is put into a high-temperature furnace, fired at 1100-1400 DEG C under an air atmosphere condition, and cooled to obtain the high-temperature phase-change heat storage composite material. The preparation method is simple in process, low in cost and easy for industrial production, and the prepared high-temperature phase-change heat storage composite material is high in shell strength, high in phase-change temperature, high in heat storage density, high in heat utilization rate and high in utilization efficiency, and is suitable for solar power generation, high-temperature industry and the like.

The invention provides a catalyst for synthesizing a low-carbon mixed alcohol by hydrogenation of carbon dioxide and a preparation method thereof. SSZ-13 molecular sieve is adopted as a carrier for synthesizing the low-carbon alcohol by the carbon dioxide, and the SSZ-13 molecular sieve has a large specific surface area, thereby greatly improving the dispersity of active components; at the same time, the SSZ-13 molecular sieve has strong hydrothermal stability and avoids carbon deposition deactivation of the catalyst caused by hot spot temperature in the process of synthesizing the low carbonmixed alcohol. Copper sources can be simultaneously introduced in the synthesis process of the molecular sieve, so that the selectivity of catalytic synthesis of the low-carbon alcohol is high, the synthesis method is simple, and large-scale production is easy; and the catalyst is particularly suitable for synthesis of the low-carbon mixed alcohol by catalytic hydrogenation reaction of the CO2, added value of products is high, and the catalyst has good application prospect.

The invention provides a slag removing agent used for smelting an aluminum alloy. The slag removing agent is characterized in that components of the slag removing agent comprise, by mass, 6-12% of sodium fluoride, 8-16% of calcium fluoride, 6-16% of sodium fluoroaluminate, 16-24% of potassium chloride, 5-10% of potassium nitrate, 12-18% of potassium fluorosilicate, 14-20% of sodium silicofluoride,4-10% of carbon powder, 5-10% of cryolite, and the rest sodium chloride added to 100%. The slag removing agent is adopted and has the beneficial effects that the heating effect is good, slag and aluminum separation is benefitted, the aluminum amount in slag is extremely low, the slag is dry slag, the slag removing effect is excellent, and moreover, the slag removing agent is easy to clear and convenient to use. Compared with the prior art, energy sources are saved, and labor hours are shortened.

The invention belongs to the technical field of nanocrystalline master alloy smelting, and in particular relates to a slag former for smelting a nanocrystalline master alloy and a slagging process thereof. The slag former is formed by two slag former systems, respectively, a first slag former system and a second slag former system. The slagging process comprises the steps of slag former preparation and secondary slagging during the smelting of a master alloy. According to the slag former and the slagging process provided by the invention, the content of aluminum in the nanocrystalline master alloy can be effectively decreased.