Process for treating slag steel

Abstract

The invention discloses a rod milling-magnetic cobbing disposing technology of steel-smelting slag in the metallurgical resource synthetic utility technological domain, which comprises the following steps: sieving materials; milling powder; vibrating to screen; magnetting; separating refined ore powder and slag; magnetting the screen material; separating soy steel and steel block slag.

Description

technical field [0001] The invention relates to a "rod grinding-magnetic separation" treatment process for steel-making slag steel, which belongs to the technical field of comprehensive utilization of resources in the metallurgical industry. Background technique [0002] At present, the domestic steelmaking slag is mainly processed by means of self-hydrolysis, jaw crushing, screening and magnetic separation. Due to the high slag content in slag steel, the smelting energy consumption is high, the efficiency is low, and the pollution is serious, which does not meet the requirements of environmental protection and circular economy. It is imperative to make it directly used in electric furnace steelmaking, which is also the development direction of comprehensive utilization of steel slag in the metallurgical industry. Since the slag steel is magnetically separated after being processed by a mechanical crushing process, its block size is not uniform, its shape is irregular, and ...

AI Technical Summary

Problems solved by technology

During wet ball milling, the ball-milled soybean steel has a smooth surface and high quality after repeated grinding, meeting the requirements of machine steel in scrap steel. The iron powder produced with an iron content of about 60% can be used for sintering and ironmaking; but wet ball milling The tailings water treatment system is complex and takes up a lot of space. Since the ball mill is a grid plate discharge material, the particle size of the feed is strictly limited. Generally, the particle size of less than 35mm can be processed smoothly; The feeding and discharging of the middle part of the hole can reach a particle size of about 350mm, but due to the intermittent feeding and discharging, frequent start-up and shutdown are required, and the efficiency is low, which cannot meet the needs of large-scale continuous production; the mill cavity There is no crushing medium inside, the grinding effect is not good, the separation of slag and iron is not complete, and the expected requirements cannot be met.

Images