Pollution-free production process for ferrovanadium alloy

Abstract

The invention relates to a pollution-free production process for a ferrovanadium alloy, and belongs to the technical field of metallurgical ferrovanadium alloy production. Two ferrovanadium production processes, namely an electro-silicothermic process and an electro-aluminothermic process are implemented in the same field through integrative innovation to achieve the capacity of producing all marks of ferrovanadium alloys, raw material complementarity in the two ferrovanadium alloy smelting processes is fully utilized, ferrovanadium powder produced by crushing a ferrovanadium finished productis directly used for producing nitrided ferrovanadium without being returned to the process for secondary smelting, and slag, linings, process waste and the like in the electro-aluminothermic processare recycled in an electro-silicothermic furnace, so that the high-efficiency and pollution-free production of smelting the ferrovanadium alloy is realized; smelting lean slag, dust and industrial wastewater produced in the two processes are recycled, the comprehensive energy consumption of the process is reduced, the resource utilization rate of smelting the ferrovanadium alloy is improved, and wastewater and waste residue are not produced in the whole process; and a circular economy concept is accorded, and the two ferrovanadium production processes, namely the electro-silicothermic processand the electro-aluminothermic process are implemented in the same field, so that design construction is integrated, and engineering cost is reduced.

Description

technical field [0001] The invention relates to a clean production process of vanadium ferroalloy and belongs to the technical field of metallurgical vanadium ferroalloy industrial production. Background technique [0002] At present, the processes used for smelting and producing ferrovanadium are: electro-silicon heat method, electro-aluminothermic method, out-of-furnace thermite method, etc. Except for China and Russia, electro-aluminothermal method is basically used at home and abroad to produce 80 ferro-vanadium. Russia mainly uses the electro-silicon thermal method to produce 50 ferrovanadium; the aluminothermic method outside the furnace has factors such as the unsuitable control of the smelting process and the low yield of vanadium, which has been gradually eliminated. Electrosilicothermic method (using vanadium pentoxide as raw material, ferrosilicon as the main reducing agent, electrode supplementary heat, large amount of slag, high power consumption, and long smelt...

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Problems solved by technology

Ferro-vanadium alloy enterprises all adopt a single smelting process to produce ferro-vanadium alloy. The single electric silicothermal method for smelting ferro-vanadium cannot realize the production capacity of a full range of grades of ferro-vanadium, but the production of medium and low-grade ferro-vanadium has significant economic advantages; The production capacity of a full range of grades of ferrovanadium, but the efficient recovery and treatment of process slag, furnace lining, vanadium-containing waste, etc., and the economic benefits of ferrovanadium production in smelting are poor. Production practice has proved that: single electrosilicothermal or electroluminothermic smelting The ferrovanadium process cannot realize the clean production of smelting ferrovanadium

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