Method for recovering low-grade copper-sulfur ore containing secondary copper

Abstract

The invention relates to a separation method of copper sulfide ore, in particular to a method for recovering low-grade copper-sulfur ore containing secondary copper. The method comprises the followingsteps: S1, ore grinding; S2, bulk flotation; S3, desliming of rough concentrate; S4, grading and regrinding of floated rough concentrate; S5, copper-sulfur separation flotation; and S6, sulfur mineral flotation, wherein a combined regulator prepared from EDTA (Ethylene Diamine Tetraacetic Acid), sodium silicate and sodium sulfide in a ratio of 5:2:1 is used for ore grinding; the bulk flotation comprises three times of flotation, butyl xanthate and Z200 are adopted as a collecting agent, and F501 is adopted as a foaming agent; and the copper-sulfur separation flotation comprises two times of concentration and two times of scavenging, copper concentrate is obtained through concentration separation, and middling products obtained through concentration and scavenging are returned, graded, reground and recycled. According to the method, the combined regulator, the foaming agent and the collecting agent with specific components and proportions are adopted, and a middling product returning and regrinding mode is adopted, so that the grade and the recovery rate of copper and sulfur concentrates are improved, and the application prospect is wide.

Description

technical field

[0001] The invention relates to a method for sorting copper sulfide ore, in particular to a method for flotation of easy-mud, high-secondary copper and low-grade copper-sulfur ore.

[0002] technical background

[0003] With the development of society, people's demand for copper metal is increasing day by day, and the copper ore resources are becoming more and more poor and fine. Increasing the sorting and recycling of complex and refractory copper minerals has extensive economic and social benefits.

[0004] Separation of low-grade copper-sulfur ore that is easy to muddy, high secondary copper, and low-grade copper-sulfur ore has been a technical problem faced by mineral processing workers at home and abroad for many years. There are three main reasons for this. One is that mines, especially open-pit mines, contain Minerals such as kaolin and chlorite are prone to muddying in the process of crushing and grinding. The slime is not only easy to cover the surfac...

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