Copper smelting slag copper metal multi-stage grinding and adapting flotation recovery method

By optimizing the grinding and flotation process of copper smelting slag, targeted separation of copper minerals of different particle sizes was achieved, improving copper recovery rate and slag concentrate grade. This solved the problems of resource waste and low separation efficiency in copper smelting slag, and realized the efficient resource utilization of copper smelting slag.

CN122424918APending Publication Date: 2026-07-21GUANGXI JINCHUAN NONFERROUS METAIS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI JINCHUAN NONFERROUS METAIS CO LTD
Filing Date
2026-04-29
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In existing copper smelting slag beneficiation processes, the mismatch between grinding and flotation equipment particle sizes leads to low copper mineral recovery rates, incomplete liberation of fine middlings, and difficulty in effectively recovering ultrafine bound copper, resulting in serious resource waste and low separation efficiency.

Method used

By combining semi-autogenous grinding, ball milling and flotation machines, and vertical milling and microbubble jet flotation machines, and by customizing grinding media, filling rate and slurry parameters, targeted separation of copper minerals of different particle sizes can be achieved. By combining sand milling and microbubble jet flotation machines, deep recovery of ultrafine copper particles can be achieved.

Benefits of technology

It improves the resource utilization rate of copper smelting slag, stabilizes the grade of slag concentrate at ≥20%, enriches iron concentrate through deep grinding of fine medium-grained ore and microbubble flotation, and reduces the copper content of tailings below the industry average, thus reducing the risk of environmental pollution.

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Abstract

The application belongs to the technical field of copper slag beneficiation, and discloses a copper smelting slag copper metal multi-stage grinding adaptation flotation recovery method, which comprises the following steps: after the copper smelting slag is ground by a semi-autogenous mill, the ground slag is mixed with the discharge of a ball mill and sent to a cyclone for classification treatment; the overflow is added with a flotation reagent to recover easy-to-float coarse copper minerals; the flotation tailings and the classified sand are subjected to secondary flotation and then two times of scavenging; the concentrates obtained through the secondary flotation and the two times of scavenging are sent to a vertical mill for grinding, and then sent to the cyclone for classification treatment; the overflow is added with the flotation reagent to recover the concentrate, which is sent to two-stage flotation columns for flotation to obtain a concentrate; the concentrate and the easy-to-float coarse copper minerals are combined as a slag concentrate product for copper recovery; the tailings obtained through the two times of scavenging are combined and subjected to magnetic separation to obtain a magnetic separation concentrate, which is ground and then added with the flotation reagent for flotation to obtain a concentrate, which is sent to a first flotation column for treatment, and the tailings are used for iron recovery. The application reconfigures the grinding and flotation process combination, realizes the separation of copper minerals of different particle sizes, and improves the copper metal recovery rate.
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