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| Study on Process Mineralogy of a Low-grade Nickel-copper Sulfide Ore |
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Received:February 20, 2022
Revised:February 28, 2022
Accepted:March 21, 2022
Published Online:August 17, 2022
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| DOI： |
| KeyWord:Low-grade; nickel-copper ore; process mineralogy; Khenpo characteristics |
| Author | Institution |
| Peng Zaihua |
School of Minerals Processing and Bioengineering，Central South University |
| Zhu Xianwen |
Technology Development of Western Mining Group Co |
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| Abstract: |
| With the continuous deep mining of a nickel-copper mine , the ore gradually tends to be "poor, fine and miscellaneous", causing certain difficulties in the comprehensive utilization of this resource. In this paper, a detailed study of the process mineralogy of the nickel-copper ore will provide technical support for the efficient recovery of the ore. Studies have shown that the ore is a sulfided nickel-copper ore, with Ni grade of 0.38%, sulfidation rate of 84.00%, Cu grade of 0.09%, sulfidation rate of 97.24%, and low copper oxidation rate, which is beneficial to the flotation recovery of copper; Co, Au, Ag can be considered for comprehensive recovery. The metal sulfide minerals in the ore are mainly pyrrhotite and nickel pyrite, followed by pyrite, chalcopyrite, small and trace goethite, sphalerite, arsenite, arsenite and galena mine. There are many flake or fibrous minerals in gangue minerals, which tend to concentrate on relatively coarse grain sizes during the grinding process, and some nickel-containing talc floats on the surface of the slurry, which is easy to enter the concentrate. Therefore, the screening of inhibitors for talc and other pumice gangue is very important. The nickel sulfate in the ore is water-soluble nickel, such as bismuth, magnesium-containing bismuth, etc., and nickel silicate is a nickel-containing silicate mineral that is adsorbed by some silicate minerals or replaced with calcium and magnesium ions in an ionic state. Nickel is the nickel remaining in the magnetic iron due to oxidation. These three types of minerals are all products of oxidation, which are difficult to enrich by flotation and affect the recovery of nickel. |
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