A combined process of sectional quick flotation and classification regrinding of copper sulfide ore

By combining segmented rapid flotation with graded regrinding, the problem of large ore circulation and heavy system load in complex sulfide copper ores was solved, achieving efficient copper recovery and stable process operation, and improving the grade and recovery rate of copper concentrate.

CN122230894APending Publication Date: 2026-06-19NORTHWEST RES INST OF MINING & METALLURGY INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWEST RES INST OF MINING & METALLURGY INST
Filing Date
2026-04-01
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In existing technologies, complex and difficult-to-process copper sulfide ores suffer from uneven particle size distribution and poor grindability, leading to insufficient or over-grinding, large middlings recycling volume, heavy system burden, and low copper recovery rate.

Method used

A combined process of rapid flotation and regrinding for copper sulfide ore is adopted, including rapid flotation, two-stage roughing and regrinding. Easily floatable minerals are recovered in a short time by using high reagent concentration and optimized aeration conditions. Middlings are diverted and different properties of copper rough concentrate are treated with differentiated regrinding fineness. An orderly middlings return path is designed and the cleaning reagent system is optimized.

Benefits of technology

It significantly reduces the amount of middlings recycled, improves the grade and recovery rate of copper concentrate, reduces the system burden, enhances the processing capacity and process stability of flotation equipment, and achieves efficient utilization of resources.

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Abstract

This invention discloses a combined process of rapid flotation and regrinding for copper sulfide ore. The process includes: grinding, rapid flotation, primary roughing, secondary roughing, regrinding, cleaning, middlings return, and product merging. This invention targets complex copper sulfide ores with unevenly distributed particle sizes. Rapid flotation prioritizes the recovery of easily floatable coarse-grained copper minerals, achieving "early recovery" and reducing subsequent circulating load from the source. After the rapid flotation tailings are separated by two roughing stages, the resulting copper concentrate is independently regrinded (with -325 mesh content exceeding 90% and 85% respectively), achieving precise liberation and preventing over-grinding. Different middlings produced in the cleaning operation are returned to their respective processing points according to their properties, dispersing system pressure and improving process stability. This invention features a simple process flow, strong equipment adaptability, effectively improving copper concentrate grade and recovery rate, and has low modification costs, showing promising industrial application prospects.
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