Experimental study on improving copper recovery rate of copper ore

Copper has an important strategic position in the development of the national economy, and copper resources are a scarce resource that is not renewable. China's copper resources have low per capita reserves and are mainly copper-poor, and there are few large-scale copper mines. With the deepening of mining, mineral resources are becoming increasingly poor, fine and miscellaneous, and the difficulty of sorting operations is increasing. Moreover, with the rapid development of the national economy, high-quality mineral raw materials and metals demand is increasing, so supply and demand is also growing. How to improve the comprehensive utilization rate of copper mineral resources, ease the contradiction between supply and demand, and ensure the sustainable development of the national economy has become one of the major issues of technological innovation.
Therefore, aiming at the characteristics of China's copper resources, increasing the deep development of low-grade copper resources and realizing the comprehensive utilization of mineral resources is conducive to alleviating the contradiction between supply and demand in China's copper industry, which has great economic and social significance. The topics chosen Tongling Nonferrous Group Anqing Copper Copper Ore iron-metal as the research object, metallic minerals in the ore chalcopyrite, magnetite (magnetic) mainly sulphide minerals like pyrite, ore more properties Complex; due to the existence of severe coarse grain undergrinding in fine ore dressing , fine grain overgrinding, complex and variable ore supply characteristics, unreasonable pharmaceutical system and other unfavorable factors, the recovery rate of concentrate products is low, and the valuable elements are not available. Full use. Based on the in-depth study of the main mineral composition and inlay relationship of the ore and the analysis of the problems of the original ore dressing process, this paper aims to improve the recovery rate of copper and comprehensively recover beneficial metals, and combine the characteristics of ore to change in the laboratory. 1 Grinding conditions: ball milling operating conditions, ball mill ball ratio, grinding concentration, grinding fineness, etc.;
2 flotation reagent conditions: the type and amount of collector, the amount of foaming agent, the pH value of the pulp, etc.
3 Flotation process: According to Professor Peng Huiqing's medium-mineral selective grading and re-grinding technology, the original beneficiation process was optimized, and new grinding conditions, flotation reagent system and beneficiation process were determined, and an ideal copper-sulfur sorting was obtained. The indicators provide a detailed theoretical basis for the concentrating plant to carry out the technical transformation of the whole process.
On the basis of the research and analysis of small-scale experiments, a semi-industrial continuous optimization verification test was carried out on the new flotation process in Anqing Copper Mine. Through the optimization and commissioning of the beneficiation process, the beneficiation index of the new process was greatly improved. The semi-industrial comparison test shows that the new grinding conditions can improve the ball mill processing capacity by about 11%, reduce energy consumption, effectively reduce the amount of sand return, improve the classification efficiency, and significantly optimize the flotation to give the ore size composition, so that the flotation index At the same time, using the medium-mine selective re-grinding technology, the traditional flotation process mode of stage grinding and sequential return is achieved, and the selective classification and re-grinding of copper ore is realized without increasing the mill. , forming a large cycle of grinding and floating, can significantly improve the monomer dissociation degree of the medium ore and effectively improve the recovery rate of copper. At the same time, it also provides a certain reference for the technical transformation of similar mines. This topic has a good development prospect and application prospects.

End Cap For Ball Mill