Useful ore minerals are mainly pyrite, yellow copper ore, sphalerite, pyrrhotite, galena, and magnetite. The gangue minerals are mainly calcite , dolomite and quartz , followed by feldspar , chlorite and mica .
Pyrite is closely associated with pyrrhotite, chalcopyrite, sphalerite, and disseminated structure; chalcopyrite is irregularly filled in the early mineral gap, and some chalcopyrite is present in sphalerite. The droplet structure; the sphalerite is filled or immersed in the gangue; the pyrrhotite is distributed in the sphalerite. The ore is mainly composed of copper-sulfur ore and sulphur-zinc ore. Copper and zinc in the ore mainly exist as primary sulfides, and secondary copper and copper-zinc oxides are less.
The two ore types have been subjected to multiple ore dressing tests. The stream flotation process has significant advantages over the separate sorting of the two ores. Therefore, a stream flotation process is adopted in the design of the ore dressing plant. The ore tested was a sulphur-zinc ore: copper sulphide ore = 2:1 mixed and floated. Using a cyanide-free process, the effect of substituting Na2SO3 for NaHSO3 is comparable. The flow process of the stream flotation is shown in Figure 4.5.9. The results of the stream flotation process are shown in Table 4.5.11.
Table 4.5.11 Stream Flotation Experimental Results
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