Process for producing high silicon manganese-silicon alloy by using electric refining furnaces

Abstract

The invention relates to a process for producing high silicon manganese-silicon alloy by using electric refining furnaces. In the process, discarded slag of liquid low-carbon ferromanganese and mid-carbon ferromanganese and silicoferrite, rejected products of electrolytic manganese metal or common manganese alloy, and discarded and rejected products of industrial silicon are used as reducing agents (raw materials) to produce various designations of high silicon manganese-silicon alloy by an intermittence method in the electric refining furnaces. The added quantity of the silicoferrite is calculated according to the content of silicon in the reducing agents (raw materials), and the designations are required that the lower the content of carbon is, the higher the content of silicon is. The content of Si is 33 percent, and the content of C is less than or equal to 0.05 percent. Two electric refining furnaces of 2000-3500KVA are simultaneously used for smelting. In the smelting process, after the silicoferrite or the industrial silicon is added, a small amount of coke is added to form two reaction interfaces to promote the reduction reaction rate of the manganese in the slag. The process has comparatively low investment, utilizes discarded slag to reduce the unit power consumption by 50 percent, reduces soot emission by more than 80 percent, has easy quality control and reduces the unit cost by 10-25 percent.

Description

technical field [0001] The invention relates to the technical field of ferroalloy smelting in iron and steel smelting, in particular to a process for producing high-silicon-manganese-silicon alloys in an electric refining furnace. Background technique [0002] High silicon manganese silicon alloy is a special iron alloy. Ferroalloys are alloys composed of one or more metal or nonmetal elements and iron elements. Ferroalloys are essential and important raw materials for the iron and steel industry and machinery industry, and their main uses are as deoxidizers, desulfurizers and alloy additives in the process of steelmaking and casting. [0003] There are many types of ferroalloys, and there are many classification methods. Generally, they are classified according to the main elements in ferroalloys, and can also be classified according to the production process and carbon content in ferroalloys. Among the various types of ferroalloys, a small amount of ferroalloys used in t...

AI Technical Summary

Problems solved by technology

The sharp increase in the cost (price) of high-silicon-manganese-silicon alloy has also affected the increase in the cost of metal manganese and micro (low) carbon ferromanganese

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