Method for producing microalloy ferro-silicon by using a ferrous metasilicate electric stove integral deoxidation and reduction

Abstract

The present invention relates to a method for producing microalloy ferro-silicon by using a ferrous metasilicate electric stove integral deoxidation and reduction, including the steps as follows: a. heating a nickel smelting waste slag or a nickel, copper and cobalt smelting waste slag to a molten state, or fetching the nickel smelting waste slag or a nickel, copper and cobalt smelting waste slagof the molten state to place in a thermal slag ladle directly; b. holding the slag in the molten state by heat insulation, at the same time infusing oxygen or air into the waste slag to react to generate solid residue to purify; c removing the solid residue; d. cooling the remained part and then crushing; e. producing the ferro-silicon through the deoxidation and reduction of the remained part asiron raw material and other raw material. For the method of the invention, firstly the nickel smelting waste slag is purified, then the purified copper smelting waste slag may be used to replace the iron raw material such as steel shaving, iron scale, sintered ball cluster and the like for the ferro-silicon production, thus it is capable of reducing the dosage of dinas rock or rock quartz; it hasbeen found that the ferro-silicon (FeSi75) produced by the method meets the national standard completely; the invention provides a novel method for producing ferroalloy.

Description

Method for producing microalloyed ferrosilicon by integral deoxidation reduction of ferrous silicate electric furnace Technical field The invention relates to a technology for comprehensive utilization of non-ferrous metal smelting waste slag (nickel smelting waste slag, copper smelting waste slag, nickel, copper, cobalt smelting waste slag), and particularly relates to a method for producing microalloyed silicon by using ferrous silicate electric furnace for overall deoxidation and reduction The iron method. Background technique Nickel smelting slag and nickel, copper, and cobalt smelting slag are smelting slag discharged from nickel smelting production, which is a kind of industrial solid waste. With the development of production, solid waste is increasing year by year. A huge amount of nickel smelting slag is stored in the open air in the slag yard around the smelting enterprise. Except for a very small amount for the cement plant as an additive (instead of iron ore), most ...

AI Technical Summary

Problems solved by technology

This is not only a huge waste of resources, but also shows that nickel smelting waste slag has great development and utilization value. However, the comprehensive utilization of nickel smelting waste slag has actually become a worldwide problem

Images