Method for producing high-purity metal vanadium ingot by three-step approach

Abstract

The embodiment of the invention provides a method for producing a high-purity metal vanadium ingot through a three-step approach. According to the method, high-purity vanadium pentoxide and high-purity aluminum powder are used as raw materials; a vanadium-aluminum alloy containing about 90% of vanadium is produced by a vacuum aluminothermic method and argon protection; a horizontal electron beam smelting furnace is used for smelting to form a metal vanadium plate by adopting, and some impurities which are easy to remove are removed, such as aluminum, iron and chromium; an electron beam ingot furnace is used for continuous smelting to form a metal vanadium column ingot, and the impurities such as aluminum, iron, chromium and the like and difficult-to-remove impurities (silicon) are furtherremoved. According to the method provided by the invention, an electron beam ingot furnace smelting step is added after a horizontal electron beam furnace smelting step; after the metal vanadium plateis melt in an electron beam ingot furnace, and is dripped into an ingot casting crucible; the impurity elements sink or float upwards in the column ingot due to different specific gravities of the impurity elements and the metal vanadium, and finally the upper end and the lower end of the metal vanadium column ingot are removed so as to obtain the high-purity metal vanadium ingot of which the silicon content is less than 0.004% and the vanadium content is increased to 99.9% or above.

Description

technical field [0001] The invention relates to the technical field of high-purity metal vanadium production, in particular to a three-step method for producing high-purity metal vanadium ingots. Background technique [0002] Metal vanadium is mainly used in aerospace materials and atomic energy industry. In atomic reactors, metal vanadium is a better neutron reflector material. At the same time, high-purity metal vanadium is also a better shielding material. It is used in aerospace and aviation industries. Manufacture rockets, missile adapter shells, etc. At present, the preparation methods of metal vanadium in China include electrolysis method, iodination method, aluminothermic reduction method, etc. The electrolysis method and iodination method produce metal vanadium, and the obtained metal vanadium has higher purity, but the output is low and the equipment requirements are high, so it is not suitable for industry. Production, but the use of horizontal electron beam furn...

AI Technical Summary

Problems solved by technology

At present, the preparation methods of metal vanadium in China include electrolysis method, iodination method, aluminothermic reduction method, etc. The electrolysis method and iodination method produce metal vanadium, and the obtained metal vanadium has higher purity, but the output is low and the equipment requirements are high, so it is not suitable for industry. Production, but the use of horizontal electron beam furnace smelting cannot effectively remove some impurities in metal vanadium, such as silicon and carbon, resulting in low purity of metal vanadium, which can only reach about 99.7%, and high silicon content, which cannot meet the use requirements