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Preparation method of vanadium-aluminum alloy

The technology of vanadium-aluminum alloy and aluminum powder is applied in the field of preparation of vanadium-aluminum alloy, which can solve the problems of low yield of vanadium-aluminum alloy, and achieve the effects of reducing production cost and improving yield.

Inactive Publication Date: 2013-02-06
CNMC NINGXIA ORIENT GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the above-mentioned process does not strictly control the reaction heat and the proportion of slagging agent in the production process of vanadium-aluminum alloy, the yield of vanadium-aluminum alloy produced by metallothermal method is low, only about 92%.

Method used

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  • Preparation method of vanadium-aluminum alloy

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Embodiment Construction

[0032] The vanadium-aluminum alloy of the present invention is prepared by an aluminum external reduction method, and the process is as follows: mixing vanadium pentoxide, aluminum particles and a slagging agent according to the proportion, and feeding them into a graphite crucible. The bottom of the graphite crucible is covered with aluminum vanadium slag.

[0033] 1. Raw material calculation

[0034] The vanadium oxide content of the raw material is 98.75%, the aluminum powder is 99.8%, the vanadium oxide yield is 94%, and AlV is 55%

[0035] Aluminum is needed for vanadium oxide reduction:

[0036] 50×0.9875×0.4945=24.4kg

[0037] Vanadium-aluminum alloys require aluminum:

[0038] 50×0.9875×0.56×0.94÷0.55×0.44=20.79kg

[0039] Sodium nitrate needs aluminum:

[0040] 1×0.52=0.52kg

[0041] Aluminum burning loss 0.6%: (24.4+20.79+0.52)×0.006=0.27kg

[0042] Total aluminum: 24.4+20.79+0.52+0.27=46kg

[0043] 2. Calorie calculation:

[0044] (50×0.9875+24.4)×4542=3350...

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Abstract

The invention relates to a preparation method of a vanadium-aluminum alloy. According to the preparation method, vanadium pentoxide is used as a raw material, aluminum is used as a reducer, a mixture of calcium fluoride and calcium oxide is used as a slag former, and a furnace-out method is used for reaction and production, wherein the heat in the reaction period is controlled at 3000-3400. The reaction heat and the slag former are strictly calculated and controlled in the aluminothermic reduction process, thereby enhancing the yield of the vanadium-aluminum alloy to 95% from 92% and lowering the production cost.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal metallurgy, in particular to a method for preparing vanadium-aluminum alloys. Background technique [0002] Vanadium-aluminum alloys are elemental additives for the production of titanium alloys and special alloys containing vanadium without iron, especially vanadium additives for the production of titanium alloys such as Ti-6Al-4V. According to the vanadium content, it is divided into three grades: 50%, 65% and 85%, and the balance is aluminum. [0003] In the prior art, vanadium-aluminum alloys are produced using flake vanadium pentoxide as a raw material, aluminum powder as a reducing agent, and calcium fluoride as a slagging agent, and are produced by an out-of-furnace method based on the metallothermic reduction principle. By adding different proportions of excess aluminum to the ingredients, different grades of vanadium-aluminum alloys, such as AlV55 and AlV85, can be obtained. Si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/04
Inventor 陈虎兵何志敏肖智海倪航星郑鹏
Owner CNMC NINGXIA ORIENT GRP