Stainless steel slag dry magnetic separation device and process

Abstract

The invention discloses a stainless steel slag dry magnetic separation device and process, and belongs to the technical field of metallurgy and mineral engineering. The device comprises a raw materialbin, a scrap steel collecting device, a crushing and screening device and a magnetic separator; the magnetic separator comprises a magnetic separation unit, a screening. mechanism and an abrasive mechanism; and the crushing and screening device comprises a crushing mechanism, a separating mechanism and a dispersing mechanism. The process comprises the steps of primary crushing and screening, secondary crushing, screening and iron removal, material dispersing, primary magnetic separation screening and secondary magnetic separation. In the treatment process of stainless steel slag, 58-60% of stainless steel slag does not need to be ground, the purposes of more crushing and less grinding of steel slag, dry grinding and tailings dry discharge are achieved, the content of free calcium oxide ina desulfurization agent is increased, and the desulfurization efficiency of the desulfurization agent is improved; and water is not consumed during treatment, a tailings pond does not need to be arranged, the production process is shortened, and the metal recovery rate in the process of selecting iron from stainless steel slag is increased.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and mineral engineering, and in particular relates to a stainless steel slag dry magnetic separation device and a process. Background technique [0002] During the stainless steelmaking process of iron and steel enterprises, due to the special smelting process of stainless steel, the amount of steel slag produced reaches 30% of the steel output. While the production capacity of stainless steel is expanding, the total amount of metallurgical solid associated waste is also increasing year by year. The tailings of stainless steel slag after iron selection have been piled up for a long time, and problems such as dust environmental pollution and social benefits have emerged. With the continuous increase of steel slag production, the existing environmental and social problems have become increasingly prominent. [0003] As an important additive element in the stainless steel smelting process, the dem...

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Problems solved by technology

[0011] The purpose of the present invention is to provide a stainless steel slag dry-type magnetic separation device and process to solve the problems of long traditional wet process flow, water consumption, high production cost, and secondary pollution caused by tailings ponds

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