Method for separating and recycling casting residues

Abstract

The invention discloses a method for separating and recycling casting residues, which comprises the following steps: paving acidic metallurgy wastes being 13%-15% of primary casting residues into an empty residue tank; pouring the casting residues and residual molten steel into the residue tank; coating by adding 16%-30% of metallurgy wastes to the liquid level of the residue tank; standing by and waiting for the pouring of the casting residues and residual molten steel in the next residue tank; transporting the residue tank to a residue field for turning the residues and cooling, after the residue tank is full; naturally layering the residues and irons after cooling; separating the residues from the steel after crushing and magnetically separating; and respectively applying the residues and the steel to the subsequent technologies. The method has the advantages that: the present equipment and the low-cost wastes are utilized; the technology is simple; the separating efficiency of the residues and residual steel is obviously increased after the method is applied; the residue and steel separation can be realized in continuous casting intermission; the cost of the separating technology of the residues and the residual steel is greatly reduced; the occupied area and the environmental pollution are reduced; the use level and value of the waste steel in the residual steel are increased; and the method has higher popularizing and applying value in the industry.

Description

technical field [0001] The invention relates to a method for recycling waste in the metallurgical industry, in particular to a method for separating and recycling casting slag. Background technique [0002] The metallurgical industry produces a large amount of continuous casting waste slag every day, that is, casting residue. In the continuous casting process, the residual steel slag (refining slag + mold slag, etc.) in the ladle often contains at least 0.5 to 1 ton of residual steel. When it is poured into the steel slag tank, due to the tense process and the short interval, the residual steel slag will be covered by the next ladle residue before it is completely solidified. As a result, severe mixing and solidification between residual steel and slag is prone to occur, and it is difficult to separate the steel and slag after cooling. Usually, it needs to be placed outside for several months until the slag is naturally pulverized. Only in this way can the steel and slag b...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for separating and recycling casting slag and molten steel, which overcomes the shortcomings of the existing casting slag separation technology, reduces the difficulty of casting slag separation, improves the grade of residual steel scrap, and solves the problem of casting slag and molten steel. The high cost of residual steel separation, in order to reduce the environmental pollution and waste of resources caused by the waste of casting slag

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