Smelting preparation method of high-purity high-silicon manganese-silicon alloy

Abstract

The invention belongs to the technical field of production of iron alloys and particularly relates to a smelting preparation method of a high-purity high-silicon manganese-silicon alloy, which is used for smelting high-purity steel and other metals. The method is characterized by comprising the following step of: smelting electrolytic manganese, industrial silicon and silicon iron serving as raw materials by using a medium-frequency induction electric furnace. A smelting process comprises the following steps of: mixing the electrolytic manganese and the silicon iron, putting the mixture into the induction electric furnace, electrifying, heating, smelting, measuring alloy components and adding the electrolytic manganese for adjusting manganese amount when the amount of manganese is insufficient; and when the silicon content is insufficient, using silicon iron or industrial silicon to adjust the silicon component and pouring a qualified component into a metal die so as to form a blocky high-silicon manganese-silicon alloy. Due to the adoption of the method, the purity of alloy can be increased remarkably, the carbon content of the alloy can be less than 0.05 percent and even carbon is not produced, P is less than or equal to 0.005 percent and S is less than or equal to 0.005. The alloy is applied to deoxidation alloying of pure steel and used for smelting a reducing agent for high-purity alloy. Moreover, the method has small equipment investment, is easy to operate and realize and has remarkable economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of ferroalloy production, and in particular relates to a method for smelting and preparing a high-purity high-silicon-manganese-silicon alloy used for smelting high-purity steel and other metals. Background technique [0002] High-silicon-manganese-silicon alloys are widely used in deoxidation alloying in the late stage of iron and steel smelting and as reducing agents for smelting low-carbon ferromanganese and other alloys. The traditional smelting method of high-silicon-manganese-silicon alloys is to use manganese-rich slag, silica, coke, charcoal, etc. One-step continuous production is adopted in the submerged arc furnace. It is difficult to produce micro-carbon or carbon-free manganese-silicon alloys by this production method. In addition, this method uses coke and charcoal as fuel and reducing agent. Raw fuels, especially coke and charcoal Most or all of the sulfur and phosphorus in the alloy are reduce...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-purity high-silicon-manganese-silicon alloy melting method, which solves the problems of high content of harmful impurity elements, complicated smelting methods and high difficulty in element content matching control in the current production of high-silicon-manganese-silicon alloys, and achieves low cost. Production of high-purity, high-silicon-manganese-silicon alloys that are easy to operate and control

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