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Copper ore beneficiation technology

As one of the important copper ore minerals, mineral processing workers for all types of copper and copper-containing multi-metal ore carried out a detailed study, especially the study of low-grade copper ore a lot of work, and has made a Batch of scientific and technological achievements. With the shortage of copper resources, famous copper enterprises have improved the utilization of copper resources through technological innovation and improved the economic benefits of enterprises. Although the copper flotation technology is more traditional and mature, the research work is also active. The specific performance is as follows: large-scale ore dressing equipment, strive to save energy and reduce consumption; further reduce the grade of copper ore selected, improve resource utilization; increase the recovery rate of copper and associated metals, reduce production costs; use high-efficiency and low-toxic beneficiation agents to reduce environmental pollution ; Optimize the process flow, etc.

In the grinding stage, the ore dressing is based on the principle of “multiple crushing and less grinding”, and develops and prioritizes energy-efficient processes and equipment. Through the use of new energy-efficient equipment, the grinding process has also been improved: determining the reasonable crushing, grinding particle size, adjusting the grinding time, the grinding machine speed and the proportion of the grinding medium, the steel using the new material Balls, linings, research and development and application of grinding aids. Combining the characteristics of ore, optimizing the structure of the grinding process, the actual stage of grinding, improving the qualified rate of the crushed product, and achieving the purpose of reducing energy consumption. The research on process mineralogy has been further strengthened, which has played an important role in improving the technical level of mineral processing equipment.

On the basis of the traditional beneficiation process, the grinding and flotation process is continuously adjusted according to the ore properties and the grain size characteristics of the copper sulfide ore. It is the main method for improving the copper concentrate grade, recovery rate and production cost of major ore dressing plants. It is also the most obvious. In order to further improve the concentrate grade and recovery rate of copper, a new rapid flotation process was introduced, combined with high-efficiency selective collectors , to achieve rapid flotation and early harvest of most copper minerals. In view of the changes in the nature of ore in recent years, the use of copper step-by-step priority flotation - medium mine re-grinding, lime-slurry, medium-salt coarse selection, high salinity selection process, and associated gold and silver The comprehensive recycling and the use of sulfur have created favorable conditions. Or according to the characteristics of the variability of the sulphur in the high-sulfur copper ore, the combination of the preferred flotation and the equal floatable phase, plus the separate separation process of the medium ore to obtain the qualified copper concentrate. Meanwhile, with high arsenic, high oxidation rate, the state of occurrence of refractory complex copper ores, using a grinding stage, grinding with a ball mill rougher concentrate, fine grinding and then tail reselection process to precipitated sodium sulphide The agent, the inhibitor of arsenic in the combination of sodium thiosulfate and ammonium chloride, successfully achieved the separation of copper and arsenic, and achieved a good selection index.

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