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A vanadium-aluminum alloy and production method technology, applied in the field of metallurgy, can solve the problems of increasing the production cost of vanadium pentoxide, restricting the development of vanadium-aluminum alloy, low recovery rate of vanadium-aluminum alloy, etc., achieving environmental protection of the process, reducing the vanadium content rate, The effect of improving the recovery rate
Active Publication Date: 2012-07-04
SICHUAN DAZHOU IRON & STEEL GROUP
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[0003] However, the main problem facing the production of vanadium-aluminum alloys with vanadium pentoxide as raw material is: a large amount of waste water containing ammonia nitrogen will be produced in the production process of vanadium pentoxide, and the waste water treatment cost is high, thereby increasing the yield of vanadium pentoxide Cost of production
Moreover, due to the low recovery rate of vanadium-aluminum alloys smelted by the existing process, the requirements for raw materials are harsh, which largely limits the development of vanadium-aluminum alloys
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Embodiment 1
[0024] A kind of production method of vanadium aluminum alloy, its concrete steps comprise:
[0025] S1-1. Acid leaching: first, pretreat the vanadium slag, including crushing and magnetic separation to remove iron, so that the particle size of the vanadium slag reaches 100 mesh ± 10 mesh; Add dilute sulfuric acid with a concentration of 25%±2% to the vanadium slag. During this process, vanadium and other substances in the vanadium slag, such as impurities containing iron, magnesium, chromium, manganese, silicon, phosphorus, and sulfur, dissolve in the in the acid solution.
[0026] S1-2, impurity removal: adjust the pH value of the acidolysis solution in S1-1 to PH=4±0.5, at this time, the vanadium in the acidolysis solution forms calcium vanadate precipitation, and most of the iron, magnesium, Chromium, manganese, silicon, phosphorus, sulfur and other impurities are leached and enter the supernatant in the state of ions, for example: most of the iron exists in the supernata...
Embodiment 4
[0040] This embodiment is the same as the production process used in implementation one, the difference being the parameters used in each process, specifically as follows:
[0041] S4-1. Acid leaching: the particle size of the pretreated vanadium slag is 110 mesh; under the condition of 105°C, add dilute sulfuric acid with a concentration of 27% to the treated vanadium slag.
[0042] S3-2. Impurity removal: adjust the pH value of the pickling solution to pH=4.5.
[0043] S3-3. Aluminothermic reduction: mix the dry vanadium-containing filter residue with aluminum powder at a ratio of 2.4:1.0, and add industrial potassium chlorate at a mass of 5.5% of the total charge weight. Wherein, 4mm
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Abstract
The invention discloses a production method of a vanadium-aluminum alloy. The method comprises the following concrete steps of: (1) acid leaching: adding dilute sulphuric acid into vanadium slag with particle size of 100+ / -10 meshes, and performing acid leaching to obtain an acidolysis liquid; (2) impurity removal: adding a solvent for adjusting pH value into the acidolysis liquid so that the pH is 4+ / -0.5 to obtain the precipitation of calcium vanadate; filtering to obtain vanadium-containing filter residue; and drying and crushing and grinding the vanadium-containing filter residue; and (3)aluminothermic reduction: matching the processed vanadium-containing filter residue and aluminum powder at a ratio of (2.0-2.4):1.0, adding a heat assisting agent, mixing uniformly and smelting to obtain a vanadium-aluminum alloy. In the invention, the vanadium slag is used as a raw material, and the production cost of smelting a vanadium-aluminum alloy is reduced. The vanadium slag is used as the smelting raw material, the environmental problem caused by a great quantity of wastewater containing ammonia nitrogen in the production process of vanadium pentoxide can be avoided from raw materials; and therefore, the technology adopted by the invention is more environment-friendly.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production method of vanadium-aluminum alloy. Background technique [0002] Vanadium-aluminum alloy is an element additive for the production of titanium alloys and special alloys containing vanadium without iron. Vanadium is a strong stabilizer in titanium alloys. Vanadium-aluminum alloy can improve the heat resistance and cold workability of the alloy, so that the alloy has good welding performance and relatively high mechanical strength. At present, the main process of producing vanadium aluminum alloy is to use pure vanadium pentoxide as the main raw material, use aluminum powder as the reducing agent, potassium chlorate as the exothermic agent to compensate the heat of reaction, and then match it with slag-making materials. The principle of thermal reduction is to produce different grades of vanadium-aluminum alloys by out-of-furnace method. [0003] However, the main...
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