Method for efficiently recovering and reselecting steel slag

Abstract

The invention discloses a method for efficiently recovering and reselecting steel slag, comprising the following steps of: A, smashing and magnetically selecting: selecting iron in steel slag in a stock dump by a lifting electromagnet, directly charging the steel slag into a smasher to be smashed, and magnetically selecting the smashed steel slag by a rubber belt conveyor and a permanent magnetic iron remover in a layering way; B, smashing and magnetically selecting again: magnetically selecting the treated steel slag by the rubber belt conveyor of a head wheel belt permanent magnetic tumbling cylinder and the permanent magnetic iron remover in a layering way; C, extruding and smashing the steel slag into fine powder by a roller type grinding circulating system; D, selecting the iron powder with refine grain diameter by a dry type powder selector; and E, grinding the fine powder steel slag which is separated by the roller type grinding circulating system and a steel slag selecting and recovering system by a ball grinder system. The method is simple and easy, and convenient to operate, so that when the iron is selected, the steel slag low-heat concrete which accords with the national standard requirement can be produced by the steel slag. The production cost and the energy consumption can be reduced, the land occupancy can be reduced, the ecological environment can be protected, and the good economic benefit, social benefit and environmental benefit can be obtained.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency comprehensive utilization and treatment of industrial solid waste and steel slag, and specifically relates to a method for high-efficiency recycling and re-selection of steel slag. diameter of iron, and the remaining steel slag is ground to make steel slag low-heat cement or specific surface area 420m 2 The finished product of steel slag micro-powder above / kg can effectively improve the activity of steel slag micro-powder, completely realize zero discharge, and solve the pollution of steel slag to the environment. Background technique [0002] Steel slag, as a kind of solid waste inevitably produced in the steelmaking process, is usually treated as garbage, and its utilization value is very low. Many iron and steel enterprises often have a headache because of the large amount of steel slag produced. my country produces as much as 15 million tons of steel slag every year. Therefore, the ...

AI Technical Summary

Problems solved by technology

Regardless of the current method of using steel slag, it only uses part of it, and the remaining waste will pollute the environment. At the same time, the economic benefits of comprehensive utilization of steel slag cannot be fully utilized.

caused a waste of resources

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