23 results about "Vanadium" patented technology

The invention relates to a micro-electrolytic filler containing a catalyst, which comprises ferrum and carbon and is added with a catalyst. The mass percents of ferrum, carbon and catalyst in the filler are 45-55%, 40-50% and 1-5%, respectively. The catalyst is one or more of the following elements: copper, vanadium, molybdenum and antimony. The invention has the advantages that, firstly, the COD de-electrolyzing rate in wastewater which has large concentration of organic matters, high poisonousness and high chromaticity and is hard to treat biochemically is improved by 10-20%, the COD removing rate is about 35-60%, the chromaticity can be removed by 60-90% and meanwhile the B/C value is improved by 0.1-0.3 and biodegradability of the wastewater is improved; secondly, the cylindrical cellular structure of the filler is beneficial to ensure adequate contract reaction of the filler and water to reduce the flowing resistance of the water; and thirdly, the carbon bed is not easy to passivate and harden and be blocked by iron mud, and the amount of sludge is reduced.

The invention discloses a treatment method of carbon felt for vanadium batteries, which comprises the following steps: oxidizing and activating carbon felt in 60-100 DEG C sulfuric acid for 0.5-4 hours or oxidizing and activating carbon felt in 20-30 DEG C sulfuric acid for 12-48 hours, and washing with water to obtain the activated carbon felt. Compared with other sulfuric acid or nitric acid oxidization methods, the invention firstly uses an alkaline solution to soak and wash the hydrophobic oil adhesive substances influencing the oxidizing process on the carbon felt surface, and then carries out the sulfuric acid oxidizing treatment, thereby increasing the oxo groups and other hydrophilic groups on the carbon felt molecules and enhancing the hydrophilicity and electrochemically active ion adsorption capacity of the carbon felt. The invention has the advantages of short treatment time and favorable carbon felt activation effect, and enhances the electrochemical activity of the carbon felt and the generation current value of the carbon felt as the vanadium battery electrode.

The invention discloses a wear-resistant heavy oil catalytic cracking catalyst capable of reducing sulfur content of gasoline. Based on the total mass of the catalyst, the wear-resistant heavy oil catalytic cracking catalyst comprises not less than 15 mass percent of mullite, 0.05-20 mass percent of vanadium in terms of vanadium element and 15-50 mass percent of Y-type molecular sieve. The wear-resistant heavy oil catalytic cracking catalyst is prepared by taking mullite microspheres, which are synthesized at low temperature by taking a large amount of vanadium-containing compound as a phase change auxiliary agent, as a raw material, performing in-situ crystallization on the microspheres to synthesize a NaY molecular sieve, modifying and exchanging. The wear-resistant heavy oil catalytic cracking catalyst has rich middle pores and macropores, is strong in wear resistance, can reduce the sulfur content of the gasoline in a catalytic cracking process and has an excellent heavy oil cracking function.

The invention relates to a preparation method of a far infrared antibacterial ceramic in the field of building materials. The method includes: compounding vanadium-titanium waste residue, bastnaesite, monezite, xenotime, Minjiang clay, quartzite, calcite, sepiolite, kaolinite and limestone according to a formula, adding a mud cosolvent and performing wet ball milling treatment, carrying out spray granulation, dry pressing, demoulding and drying, and then conducting firing so as to obtain the far infrared antibacterial ceramic product. The formula comprises, by mass percentage: 20-50% of vanadium-titanium waste residue, 3-5% of bastnaesite, 2-4% of monezite, 2-6% of xenotime, 10-30% of Minjiang clay, 15-45% of quartzite, 5-15% of calcite, 2-6% of sepiolite, 2-10% of kaolinite, and 4-8% of limestone. The far infrared antibacterial ceramic prepared by the method provided by the invention has the advantages of high infrared emissivity, good sterilizing effect, high ceramic strength and low cost.

The invention provides the high-strength 23Mn2CrNiMnVERA steel for railway train connection and a preparation method thereof. The 23Mn2CrNiMnVERA steel comprises the following components of carbon, silicon, manganese, vanadium, aluminum, chromium, molybdenum, nickel, cerium, copper, phosphorus, sulfur, Fe and non-removable impurities; the preparation method comprises the steps of molten iron pretreatment, converter smelting, LF refining, VD vacuum refining and continuous casting tapping. The high-strength 23Mn2CrNiMoVREA steel for connection has the advantages of being easy to weld, high in tensile property and high in yield strength at low temperature (-60 DEG C); and the preparation method of the high-strength 23Mn2CrNiMnVERA steel for the railway train connection has the advantages of being easy to control in the process and suitable for popularization.

The invention relates to a high-temperature-resistant high-performance rare earth permanent magnet material. The high-temperature-resistant high-performance rare earth permanent magnet material is prepared from, by weight, 20-35% of rare earth elements, 0.8-1.5% of boron, 0.02-0.2% of molybdenum, 0.5-5% of silicon, 0.1-3% of vanadium, 0.02-0.5% of calcium, 0.02-0.5% of zirconium, 0.02-0.5% of chromium, 0.5-5% of nickel and the balance iron and inevitable impurities. The rare earth permanent magnet material has high high-temperature resistance and excellent mechanical performance and is low in cost and high in stability, a preparation method is simple, and large-scale industrial production can be easily achieved.

The invention discloses a double shaft furnace system and method for joint production. The double shaft furnace system comprises a first mixing tank, a first compressor, a heating furnace, a first shaft furnace, a dust removal system, a conversion system, a first CO2 remover, a second mixing tank, a modified heating furnace, a second shaft furnace, a water washing tower, a second CO2 remover, a second compressor and connecting pipelines between all the above components. The invention further discloses a method for jointly producing iron-containing products by using the system. According to the system and the method, the two shaft furnaces with different working conditions are combined based on the different characteristics of a vanadium titano-magnetite mineral resource and an iron ore concentrate resource so as to realize direct reduction of different minerals; different pressures of reaction conditions of the two shaft furnaces are utilized, so that the gradient use of the pressure is effectively realized, the energy utilization rate is improved, the equipment investment cost is reduced to a certain extent, and the equipment complexity is reduced; and the characteristic that the volume ratio of hydrogen to carbon monoxide in effective reducing gas in the first shaft furnace is different from the volume ratio of hydrogen to carbon monoxide in effective reducing gas in the second shaft furnace is effectively utilized, so that efficient utilization of energy and resources is realized.

The invention discloses a novel powder metallurgical gear. The novel powder metallurgical gear is prepared from iron powder, copper powder, molybdenum powder, vanadium powder, nickel powder, yttrium powder, aluminum powder, magnesium powder, cobalt powder, lead powder, steel slag powder, cupola slag powder, ferroalloy slag powder, modified tree ash powder, graphite powder, epoxidized butyl stearate, silicone oil, methylcellulose, aluminum stearate, polyethylene glycol, ethylene bisstearamide, stearic acid, carbon fibers, glass fibers, boron nitride, epoxy propoxy propyl trimethoxysilane, silica, manganese sulfide, acrylate, an inhibitor, a binder, an enhancer, a cutting agent, a lubricant, a coupling agent and a dispersion agent. According to the novel powder metallurgical gear, through the specific composition proportion, the novel powder metallurgical gear is even in overall density, high in density, high in ductility and area percentage reduction, good in wear resistance, strength and hardness, high in material utilization rate and suitable for quickly producing high-performance gears on a large scale.

The invention is a continuous process for producing titanium tetrachloride having a vanadium content of less than 5 ppm.

The invention relates to the field of automobile making, in particular to a novel thermoforming reinforcer and a processing method thereof. The novel thermoforming reinforce comprises the following components in parts by weight: 20-30 parts of iron, 3-5 parts of nano silicon carbide particles, 3-5 parts of tungsten, 1-2 parts of manganese, 2-6 parts of molybdenum, 3-5 parts of cobalt, 2-3.5 partsof nickel, 1-2 parts of chromium, 3-5 parts of vanadium and 2-4 parts of titanium. A manufacturing method for the reinforcer comprises the following steps of: (1) uniformly mixing the components; (2)adding mixed raw materials into a heating furnace to refine; (3) forging and pressing; (4) quenching; (5) tempering; and (6) stamping and manufacturing. A stamping part material manufactured by the manufacturing method has excellent hardness, excellent yield strength and excellent tensile strength.

The invention discloses an improved coconut shell and a method thereby for reducing vanadium in a water body, and belongs to the field of metallurgy. The invention aims to solve the technical problemthat the improved coconut shell and the method thereof for reducing the vanadium in the water body are provided. The modified coconut shell is prepared in the following steps: the coconut shell is washed, dried and smashed to obtain a powdery material; the powdery material is mixed with a citric acid solution and absolute ethyl alcohol and is subjected to oscillation and suction filtration to obtain a filter cake; the filter cake is washed and dried to obtain the modified coconut shell. The method for reducing the vanadium in the water body by the above coconut shell comprises the following steps: mixing the modified coconut shell and vanadium containing wastewater; carrying out oscillation and suction filtration to obtain purified solution. According to the method, the improved coconut shell is used for reducing the vanadium in the water body, wastes are reused, the vanadium in wastewater can be effectively recovered and utilized, the influence of the vanadium on environment is lightened, and the method has an obvious social benefit.

The invention discloses high heat input welding resistant building steel and a production method thereof, and belongs to the technical field of steel production. The steel for the building comprises the following chemical components in percentage by mass: 0.05 to 0.18 percent of C, 0.05 to 0.75 percent of Si, 0.65 to 1.75 percent of Mn, 0.003 to 0.02 percent of P, 0.001 to 0.015 percent of S, 0.005 to 0.075 percent of Al, 0.01 to 0.05 percent of Nb, 0.01 to 0.07 percent of V, 0.005 to 0.04 percent of Ti, 0.001 to 0.01 percent of Mg + Ca, 0.002 to 0.01 percent of O, 0.005 to 0.015 percent of N and the balance of Fe and residual elements, the contents of V, Ti and N also meet the relational expression: 1.06 [Ti] < 3.64 [N] < [V] + 1.06 [Ti]. Precipitated particles formed by nitrides of titanium, niobium and vanadium and oxides of magnesium and calcium play roles in pinning austenite grains and promoting ferrite nucleation; and by adjusting alloy components and a smelting process, the number and form of various nitrides and oxides are reasonably and effectively controlled, coarse structures generated in the welding heat cycle process are eliminated, and the welding performance of the building steel is improved.

The invention discloses a smelting method for rare-earth microalloyed steel. The smelting method can be used for smelting the rare-earth microalloyed steel. By controlling the temperature, the vacuumdegree and the contents of sulfur, rare earth, oxygen, aluminum and phosphorus, high-precision and high-purity steel which is low in content of impurities and satisfies production requirements is obtained through twice smelting. In a smelting process, original vanadium (niobium, chromium, molybdenum and titanium) alloying elements in molten iron are effectively prevented from being oxidized and burnt, so that follow-up addition of vanadium (niobium, chromium, molybdenum and titanium) is reduced. Besides, the contents of sulfur, phosphorus, oxygen and aluminum in molten iron are reduced beforeadding of rare earth alloy, so that the amount of rare earth alloy which is oxidized and vulcanized is reduced, and the addition of rare earth alloy in steel is effectively reduced. Meanwhile, formation of aluminic acid rare earth, phosphoric acid rare earth or phosphoric rare earth occluded foreign substances is reduced, so that the quality of an end product is improved. By adoption of the smelting method, the smelting cost is lowered, and beneficial effects in smelting rare earth containing vanadium (niobium, vanadium, chromium, molybdenum and titanium) steel are improved.

The invention discloses an alloy powder for plasma cladding. The alloy powder for plasma cladding is mainly composed of, by mass, 51%-65% of chromium, 0%-15% of vanadium, 8.1%-9% of carbon, 6.1%-8% ofboron, 0%-6% of cobalt, 0%-12% of tungsten carbide and the balance Fe and unavoidable impurities. The alloy powder for plasma cladding is especially suitable for plasma cladding of wear-resistant parts, and a cladding layer is high in hardness, good in wear resistance, small in cracking tendency and good in plasma cladding technology performance.

On a front surface of an n⁺-type starting substrate containing silicon carbide, a pin diode is configured having silicon carbide layers constituting an n⁺-type buffer layer, an n⁻-type drift layer, and a p⁺-type anode layer sequentially formed by epitaxial growth. The n⁺-type buffer layer is formed by so-called co-doping of nitrogen and vanadium, which forms a recombination center, together with an n-type impurity. The n⁺-type buffer layer includes a first part disposed at a side of a second interface of the buffer layer with the substrate and a second part disposed at side of a first interface of the buffer layer with the drift layer. The vanadium concentration in the second part is lower than that in the first part. The vanadium concentration in the second part is at most one tenth of the maximum value Vmax of the vanadium concentration in the n⁺-type buffer layer.

The invention provides a material formula for a diamond bit. The material formula is characterized by comprising the following components in part by mass: 60-80 parts of iron powder, 10-15 parts of manganese powder, 3-5 parts of chromium powder, 3-8 parts of nickel powder, 2-6 parts of vanadium powder, 10-15 parts of tungsten powder, 1-2 parts of zirconium powder, 3-5 parts of niobium, 1-5 parts of lead powder, 3-8 parts of nano graphite powder, 1-5 parts of molybdenum disulfide powder, 3-12 parts of silicon dioxide powder, 1-3 parts of magnesia powder and 2-4 parts of crystal water.Accordingto the invention, the optimized alloy steel formula is adopted to manufacture the diamond bit; the diamond bit is low in production cost and higher in tensile strength, yield strength and hardness; aplurality of alloy elements including nickle, vanadium, tungsten and the like are added in the components and are uniformly distributed in the internal structure of alloy steel; and moreover, the lubricating components including nano graphite powder and molybdenum disulfide powder are added, and nano graphite powder and molybdenum disulfide powder reduce brittleness and prolong the service life ofthe diamond bit.

The invention provides a method for preparing prestressed steel strands for cable suspension. The steps are as follows: take six galvanized steel wires, twist each two galvanized steel wires into a preliminary strand; The preliminary stranded wire is immersed in the molten gel, and then taken out to allow the gel wrapped on the surface of the galvanized steel wire to solidify naturally; then the three preliminary stranded wires and a hose are spirally twisted again to form a prestressed galvanized steel strand The rubber hose is located between the three preliminary twisted wires; the rubber hose is composed of a tube body and a gel filled in the tube body, and a number of through holes are evenly opened on the tube body; the gel is made of resin and bauxite and asbestos powder, the mass ratio of the resin to bauxite and asbestos powder is 12:1.6:3.1. The invention can make the prestressed galvanized steel strand have the functions of waterproof, anti-corrosion and saline-alkali corrosion resistance, and also has the advantages of long service life, high tensile strength, less steel consumption, low cost and good use effect.

The invention discloses a chemical industry raw material placing barrel, and relates to the technical field of chemical industry equipment casting. The chemical industry raw material placing barrel is characterized by comprising, by weight, 71-93% of Fe2O3, 25-39% of vanadium, 15-25% of a sodium chloride solution, 5-15% of calcium carbonate, 1.5-4.5% of p-toluenesulfonic acid, 12.5-21.5% of a methane coupling agent KH-550, and 22-30% of modified sodium silicate sand. According to the present invention, the method is reasonable, the operation is easy, and the chemical properties of the product are excellent.