Cold steel scoria processing method

Abstract

The invention discloses a cold steel slag processing method, which comprises the following steps of: pouring processed solidified and moistened cold steel slag into an inclinable grizzly for screening, magnetically separating iron contained in the lower layer by a head wheel permanent-magnet drum, and carrying out secondary screening by a first vibrating screen; delaminating and removing iron of larger slag blocks after screening by a belt-type iron remover and a permanent-magnet drum, crushing by a hydraulic protection crusher, screening by a second vibrating screen, returning larger slag blocks and crushing to form a one-step closed-loop circle; screening small slag blocks screened by the first vibrating screen and the second vibrating screen by a third vibrating screen; and screening the small ones by a fourth vibrating screen, and circularly crushing the large ones to form a secondary closed-loop circle, wherein the slag blocks screened by the third and the fourth vibrating screens are the final slag powder, and all of the magnetically-selected metal materials are transported to small iron material fields, bean steel material fields or roe steel material fields. By adopting double closed-loop circle process, the cold steel slag processing method has high efficiency, low labor intensity and less dust in process and can completely achieve zero discharge.

Description

technical field [0001] The invention relates to a steel slag treatment process, in particular to a cold steel slag treatment method after hot-melt steel slag has been processed. Background technique [0002] With the development of the steel industry, the amount of steel slag also increases. At present, there are many steel slag treatment processes. After the hot-melt steel slag is processed, it is excavated and loaded with loaders, electric shovels and other equipment, and then transported to the waste slag yard. The stockpiling of steel slag not only occupies a large amount of cultivated land and pollutes the environment, but also 7% to 15% of steel can be recovered from steel slag. The steel slag that needs to be processed and utilized is transported to the steel slag treatment room for crushing, screening, magnetic separation and other processes. [0003] Steel slag can be used as smelting flux, steel slag cement, construction aggregate, agricultural fertilizer and soi...

AI Technical Summary

Problems solved by technology

[0005] The original cold steel slag treatment process is mainly to extract metal materials. The slag blocks in it cannot be processed and can only be piled up and buried, which not only fails to meet environmental protection requirements, but also causes waste; The materials are not uniformly transported and screened by the conveyor belt, and the large and small materials are mixed and need to be sent to the stockyard manually. The degree of automation is low, and it is not conducive to the utilization of slag in the subsequent process.

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