A copper slag beneficiation process

Abstract

The present invention provides a copper furnace slag mineral processing process. According to the copper furnace slag mineral processing process, the slow cooling mode adopts centralized natural slow cooling for 12 h and spraying slow cooling for 60 h so as to prolong the slow cooling time of the slag ladle at a temperature of 1000-1250 DEG C, increase the opportunity of collision and growth of the copper matte particles, and easily achieve the crystallization development of the copper crystal, such that the recovery rate of the subsequent flotation operation is easily increased; the disseminated grain size of the copper sulfides in the furnace slag is fine, and for complete dissociation of the useful minerals, the stirring mill is adopted to carry out mineral grinding, ie., the crude concentrate is graded with a cyclone device, the setting sand after the grading is subjected to mineral grinding by adopting the stirring mill, the overflow after the grading is subjected to fine selection twice by adopting the flotation column, and the selected concentrate is directly adopted as the final concentrate, wherein the tailings being subjected to the one fine selection through the flotation column is sorted by adopting the flotation machine, and the tailings being subjected to the double fine selection through the flotation column cyclically returns. According to the present invention, the flotation machine, flotation column and vertical stirring mill combined process combining the machine, the column and the mill is adopted, such that the useful minerals with various particle sizes are easily recovered, and the metal recovery rate is efficiently increased.

Description

technical field [0001] The invention belongs to the field of beneficiation technology, and in particular relates to a copper slag beneficiation process. Background technique [0002] Copper slag is the waste slag produced in pyrometallurgy of copper, and the amount of slag increases with the increase of copper smelting production. Jinchuan copper slag can be divided into converter slag, flash slag, synthetic slag, electric furnace slag, etc. due to different furnace types. The copper content in converter slag is relatively high, and the copper grade can reach 3-12%. Low, copper grade can reach 0.6-0.8%. Compared with most domestic copper mines, copper slag is a high-grade secondary resource. How to recover the copper in the slag, a lot of research work has been done at home and abroad. At present, the flotation method has been well applied in production. However, the type of smelting furnace is different, the slow cooling process is different, and the properties of the s...

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Problems solved by technology

At present, the traditional stage grinding and stage separation flotation process is adopted in copper furnace slag beneficiation at home and abroad. This process is the most effective method for recovering copper in slag in the existing beneficiation technology, but in terms of comprehensive recovery rate, It is always between 76-80%. The main reason is that the slow cooling conditions are different, resulting in a large difference in the slag crystallization structure. In addition, the traditional grinding and flotation process is not effective in recovering fine-grained copper minerals in the ore. It is the main reason for the low comprehensive recovery rate of copper slag

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