Optimized process for processing steel slag by magnetic separation

Abstract

The invention relates to an optimized process for processing steel slag by magnetic separation, which is characterized by comprising the following steps: (1) screening steel slag by using a No.1 vibrating screen, separating out the steel slag and slag steel by using a No.1 magnetic separator to separate the oversize material, feeding the slag steel to a slag steel tank, and feeding the steel slagto a jaw crusher; (2) feeding the screen underflow of the No.1 vibrating screen and the discharge of the jaw crusher to a No.2 vibrating screen together, separating the oversize material by using a No.2 magnetic separator, feeding the separated slag steel to a rod mill, and stripping steel slag on the slag steel by the vibration effect of the rod mill; (3) feeding the steel slag separated out by the No.2 magnetic separator to a No.3 vibrating screen, feeding the oversize material to a large-size tailing storeroom, and feeding the screen underflow to a medium-size tailing storeroom; and (4) feeding the discharge of the rod mill to a No.4 vibrating screen, feeding the oversize material the iron content of which is no less than 90% to the slag steel tank, feeding the screen underflow to a No.3 magnetic separator, feeding the separated steel slag magnetic separation powder to a magnetic separation powder storeroom, and feeding the steel slag to a small-size tailing storeroom. By using theinvention, high-quality slag steel the iron content of which is more than 90% can be obtained, thereby fully recovering the iron in the steel slag.

Description

technical field [0001] The invention relates to a steel slag treatment process, in particular to an optimization process for magnetically separating steel slag. Background technique [0002] Steel slag is the waste slag discharged during the steelmaking process. At present, the domestic steel slag processing technology is single, and crushing-screening-magnetic separation is generally used. Anshan Iron and Steel currently has a 2.4 million tons / year magnetic separation processing line to process steel slag produced by converters. The production line adopts two stages of crushing and two stages of magnetic pulley separation, and the steel slag magnetic separation products after separation are divided into granular steel, magnetic separation powder, and converter tailings. The granular steel produced has a particle size of 10-50mm and an iron content of 60%-65%. Because of the large fluctuations in alkalinity, it is difficult to return to the blast furnace for reuse, and a la...

AI Technical Summary

Problems solved by technology

The granular steel produced has a particle size of 10-50 mm and an iron content of 60% to 65%. Because of the large fluctuations in alkalinity, it is difficult to return to the blast furnace for reuse, and a large number of granular steel is stockpiled, polluting the environment

Images