Slag steel dry magnetic separation purifying technology and equipment

Abstract

The invention relates to a slag steel dry magnetic separation purifying technology and equipment and belongs to the field of metallurgy. The slag steel dry magnetic separation purifying technology comprises the steps that S10, slag steel blocks are crushed; S20, steel slag powder in crushed slag steel is filtered out and warehoused; S30, the dust-free crushed slag steel is distinguished through magnetic separation; and S40, warehousing is conducted. According to the design adopted by the slag steel dry magnetic separation purifying technology and equipment, the magnetic spike phenomenon can be avoided; and meanwhile, dust does not overfly outwards, the work environment is not affected, and sewage and sludge are avoided, so that the environment is not burdened.

Description

technical field [0001] The invention relates to a slag-steel dry-method magnetic separation purification process, which belongs to the field of metallurgy. Background technique [0002] Steel slag is an unexpected material in the steelmaking process, but it contains a large amount of metallic iron. If it is discarded directly, it will cause very huge losses. In existing actual production, two kinds of purification processes are commonly used, one is wet purification process and the other is dry purification process. The wet purification process is suitable for steel slag with an iron content of 20%-30%. The steel slag is mixed with water and crushed by a rod mill. Impurities and sludge are precipitated, and iron is collected and put into storage. However, this process sewage contains a lot of metals , will cause serious pollution. Although the dry purification process can avoid sludge pollution, it is only suitable for steel slag with iron content below 2%. At the same ti...

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Problems solved by technology

The wet purification process is suitable for steel slag with an iron content of 20%-30%. The steel slag is mixed with water and then crushed by a rod mill. Impurities and sludge are precipitated, and iron is collected and put into storage. However, this process sewage contains a lot of metals , will cause serious pollution

Although the dry purification process can avoid sludge pollution, it is only suitable for steel slag with iron content below 2%

At the same time, due to the large amount of powder mixed in the steel slag in the above two purification processes, magnetic spikes will appear during magnetic separation, which will reduce the efficiency of magnetic separation

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