Technology status of copper ore beneficiation

Copper ore is basically to go through separation, flotation separation of copper is the main method of gravity separation and magnetic separation, can also be used. At present, because of low grade ore, refractory ore, increase the proportion of composite oxide ore. Energy and equipment prices coupled with the environmental constraints, resulting in the beneficiation cost increase, so the copper plant to process improvement and application of energy saving technology, improve the comprehensive utilization of mineral resources, and the full recovery of associated gold, silver, molybdenum and other valuable elements. For example, Canada has from the ore recovery of nickel, molybdenum and zinc and other associated metal. To increase the level of comprehensive utilization of copper ore dressing metallurgy combination process, the application is an important development trend. For example, the Soviet Union mine by flotation hydrometallurgical process Hu jiesike processing pyrite recovery of eight kinds of elements, the recovery rate of copper, zinc and 92%: 97%, 66%, 64%, cadmium cobalt iron 90%, sulfur 82%, and gold and silver. The status of foreign copper processing: foreign copper concentrator has hundreds of large-scale plant, but more concentrated in a few copper producing nation, among them, 25 America (accounting for the mineral copper 95%), the Soviet Union 40, Canada 20, Zambia 10. In recent years, although foreign copper beneficiation technology has no major breakthrough, but in the beneficiation process, flotation reagents, equipment, automatic control and other aspects of the use of the combined process was made great progress. In allowing the resources and other conditions, the new plant scale increasing, the old factory has expansion to increase capacity.

Domestic copper processing status: China's existing 32 large and medium-sized copper plant, with an annual output of more than 10000 tons of copper concentrate in the Tonglushan, Dexing, silver, Yimen, snow and other plant. Such as processing capacity in more than 3000 tons of 13 tons, 500-3000 15. Ore grade is 0.94% on average, while the ore grade decreased year by year, but the grade of copper concentrate with the technological development and technological progress and improving year by year. With the improvement of construction and the process of copper concentrator, the concentrator of copper concentrate in the rapid growth of the volume of metal. At the same time, plant automation level has been improved, such as Hebei copper concentrator with constant automatic control instrument to the mining machine and the concentration of the ball mill, Lantau Peak plant - type 300 ore carrier X- fluorescence analyzer, stable process control of flotation.