High-efficiency economic secondary treatment process for steel slag

Abstract

The invention relates to a high-efficiency economic secondary treatment process for steel slag. The process comprises the following steps: step 1, allowing steel slag processed in an enclosed steel slag heating workshop to enter a first overturning grate for screening and carrying out magnetic separation on materials on the grate by using an electromagnetic chuck; step 2, allowing materials below the grate to enter a first belt magnet separator for magnetic separation and allowing non-magnetic steel slag to enter a hydraulic jaw crusher for crushing; step 3, allowing the material processed by the hydraulic jaw crusher to enter a second vibrating screen for screening and allowing materials below the second vibrating screen to enter a second belt magnet separator for magnetic separation so as to obtain magnetic separation powder and tailing powder; and step 4, allowing materials on the second vibrating screen to enter a rod mill for rod milling, allowing materials having undergone rod milling to enter a third vibrating screen for screening and allowing materials below the third vibrating screen to enter the second belt magnet separator for magnetic separation so as to obtain magnetic separation powder and tailing powder. The process provided by the invention can maximumly recover steel slag, has a high slag steel recovery rate and a high tailing utilization rate and is simple and easily practicable.

Description

technical field [0001] The invention relates to an efficient and economical steel slag secondary treatment process, which can be widely used in the recovery and treatment of converter steel slag, desulfurized steel slag, casting residue, etc., and belongs to the technical field of resource recovery and utilization of steelmaking and metallurgical steel slag. Background technique [0002] At present, steel slag is a by-product of steelmaking, and its output is about 10-20% of the molten steel. Steel slag contains about 10% iron slag. If it is not treated, it will not only cause a large amount of slag steel loss every year, but also discharge slag powder and bring harm to the surrounding environment. Therefore, the processing and comprehensive utilization of steel slag can be realized, and the waste slag can be turned into useful products. , not only to ensure the normal production of iron and steel enterprises, the need to save energy, but also the urgent need for comprehensi...

AI Technical Summary

Problems solved by technology

In order to reduce the crushing pressure, the hot steel slag in the molten state is granulated as much as possible by pretreatment methods such as hot splashing and hot stuffiness, and then through mechanical crushing and magnetic separation, the slag steel is selected and returned to use, and the conventional steel slag is treated twice The recycling rate of steel slag is low, and the process is more complicated

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