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Click to add WeChatCopper is a metal with high electrical and thermal conductivity. It is widely used in electrical, construction, electronics, energy, infrastructure and other industries. As a strategic metal, it is of great significance to national security and industrial stability. With the continuous growth of global demand for copper, the high-quality and easy-to-select copper resources are decreasing, forcing mining companies to turn to the development of difficult-to-select copper ores. So how to select oxidized copper ores? The following text takes an iron-containing oxidized copper ore as an example to introduce its beneficiation process.
A high-iron oxidized copper ore is a polymetallic mine dominated by copper and iron, with associated gold and cobalt. The main metal minerals in the ore are limonite, hematite, magnetite, malachite, chalcopyrite, and covellite; followed by pyrite, chalcocite, etc.; non-metallic minerals are mainly quartz, mica, and clay minerals; followed by dolomite, feldspar, chlorite, etc. The copper sulfide minerals in the ore are mainly chalcopyrite, followed by covellite and bornite. Chalcopyrite is mainly in the form of heteromorphic particles, mostly embedded between quartz particles, and also between pyrite and magnetite particles; the particle size of chalcopyrite is mainly concentrated between 0.03 and 0.10 mm.
The copper and iron in the minerals have recyclable value, and the oxidation rate of copper is relatively high, reaching 60%; the magnetic iron in the iron minerals is 11.43%, and the hematite is 18.78%.
Through the analysis of the ore, it is known that the valuable metal minerals in the ore are copper-containing minerals and hematite, and the embedded particle size is uneven. In order to fully recover the copper and iron in the minerals, the copper beneficiation index and the dissociation degree of the metal minerals were comprehensively considered. Through experimental analysis, it was finally determined that the grinding fineness was -0.074mm, accounting for 82%.
The beneficiation process adopted several different schemes for beneficiation tests: washing-grinding-copper flotation-ferromagnetic gravity separation, grinding-flotation, grinding-desludging-copper flotation, grinding-magnetic gravity separation-copper flotation 4 processes.
Washing-grinding-copper flotation-ferromagnetic gravity separation: The process of washing and desludging-grinding-two roughing, three fines and three sweeping-one magnetic separation-one gravity separation is adopted. Finally, the desludging yield of the washing operation is 7.84%, the copper content in the mud is 0.97%, and the copper concentrate obtained contains Cu18.02% and the copper recovery rate is 72.31%; the iron concentrate contains TFe61.79% and the iron recovery rate is 52.11%.
Grinding-flotation: This link is designed for the pre-desludging process, which adopts two roughing, three fines and three sweeping. The copper concentrate obtained contains Cu16.79% and the recovery rate is 67.32%. The copper concentrate grade is not high and the copper recovery rate is low.
Grinding-de-sludge-copper flotation: The de-sludge product contains 0.98% Cu, and the recovery rate is 12.83%. It can be seen that the Cu grade in the de-sludge product is relatively high. The copper rough concentrate obtained by secondary roughing contains 4.37% Cu, and the recovery rate is 62.74%.
Grinding-magnetic gravity separation-copper flotation: First, the hematite is recovered by magnetic gravity separation, and then the copper-containing minerals are recovered by flotation. The process of one magnetic separation and one gravity separation is adopted. The iron concentrate obtained contains TFe59.29%, the iron recovery rate is 53.06%, and Cu.24%, the copper loss rate is 10.26%, and the loss rate is relatively large.
Through the comparison of the above several schemes, it was finally decided to adopt the ore dressing process of first flotation copper and then iron recovery. Among them, the copper flotation process is ore washing-grinding-copper flotation process, and the tailings iron recovery process adopts the magnetic separation-centrifuge gravity separation process.
The above is the process scheme for the dressing of a high iron oxide copper ore. After the dressing test analysis, a suitable copper ore dressing process flow was designed for it. Xinhai is an enterprise that provides "mining full industrial chain services (EPCM+O). It is an international mining engineering general contracting service provider that integrates mining technical consulting and experimental research with mining design, complete equipment manufacturing and procurement, mining tailing engineering construction and installation, commissioning and delivery, mining construction management, mining production operation management and services and industry resource integration. If you need, please consult.
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