Mineral processing technology for recovering copper from copper-sulfur ore containing secondary copper sulfide ore

Abstract

The invention discloses a beneficiation process for recovering copper from copper-sulfur ore containing secondary copper sulfide ore. The copper-sulfur ore mainly refers to chalcopyrite and pyrite in the ore, the secondary copper sulfide ore comprises chalcocite, copper blue and the like, and the beneficiation process method for recovering copper from the ore comprises the following steps of (1) ore grinding, specifically, the copper-sulfur ore is ground to obtain an ore pulp product; (2) copper-sulfur bulk flotation: adding lime, sodium sulfide, a collecting agent and a foaming agent into the ore pulp product for pulp mixing, and roughing for four times to obtain copper-sulfur mixed rough concentrate and tailings; (3) regrinding the copper-sulfur mixed rough concentrate: adding lime into a grinding machine, and regrinding the copper-sulfur mixed rough concentrate to obtain a copper-sulfur separated ore sample; and (4) copper and sulfur separation: lime, a collecting agent and a foaming agent are added into the copper and sulfur separation ore sample for pulp mixing, then one-stage roughing, two-stage concentration and two-stage scavenging are carried out, copper concentrate is obtained through concentration, and sulfur concentrate is obtained through scavenging. According to the method, the comprehensive copper-sulfur mixed rough concentrate is obtained by carrying out classified multi-time flotation in the roughing stage; and in the subsequent copper and sulfur separation stage, the copper minerals are selectively collected by adding the lime in stages and adopting the efficient separation collecting agent, collection of the pyrite is weakened, and the copper and sulfur separation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a beneficiation process for recovering copper from copper-sulfur ore containing secondary copper sulfide ore. Background technique [0002] Copper is an important strategic resource with a wide range of applications. At present, the demand for copper metal in China's non-ferrous materials is second only to aluminum, and the external dependence of copper concentrate is also expanding. Every year, a lot of blister copper raw materials and copper concentrate are imported from abroad. However, my country's copper resources are limited, and copper ore types are diverse and small in scale, including porphyry-type copper deposits, skarn-type, sandstone-type, pyrite-type, and copper-nickel sulfide ore. At the same time, there are few single copper deposits, and most of them show symbiotic and associated phenomena, which leads to technical difficulties and relatively compl...

AI Technical Summary

Problems solved by technology

Due to differences in crystal structure and structure, secondary copper sulfide deposits are often less buoyant than primary copper sulfide deposits, and secondary copper sulfide deposits generally have fine-grained embedded particles, which are easy to grind during the grinding process. A large amount of free copper ions are generated, which can easily increase the buoyancy of sulfide ores activated by copper ions (such as pyrite), resulting in difficulties in the subsequent separation of copper and sulfur, affecting the quality of copper concentrate

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