1. Classification of copper sulfide ore
The industrial types of copper ore in China are: layered copper ore, fine vein disseminated copper, skarn copper, pyrite copper and porphyry copper. About 60% of the world's copper is currently from porphyry copper ore.
The difficulty of copper ore flotation is closely related to the content of iron sulfide in the ore. According to the content of iron sulfide, copper sulfide ore is divided into two types, one is dense brittle copper ore and the other is disseminated copper ore. The former is characterized by high content of pyrite in the ore, sometimes up to 80% to 85%, gangue content is very small, and copper sulfide and iron sulfide minerals are densely symbiotic. The tailings remaining after the ore is selected from the copper sulfide minerals are usually iron sulfide concentrates. If the gangue content is high, the pyrite should be sorted to obtain a pyrite concentrate. The latter's ore body is mainly composed of gangue minerals, and the content of copper sulfide and iron sulfide is low, and it is distributed in the gangue. The majority of our copper ore processing plant is disseminated copper ore.
2. The floatability of copper sulfide ore
The most common copper mineral in China's copper ore is chalcopyrite (CuFeS2, containing 66.49% copper, followed by chalcopyrite (Cu2S, 79.83% copper), copper blue (CuS, 66.49% copper), copper Mine (Cu3FeS3, containing 55.5% copper). From the perspective of floatability, the copper ore and copper blue are the most easy to float. They are secondary copper mines with low hardness and easy to mud. Chalcopyrite is the most distributed. wide primary minerals, flotability or, a typical collector type xanthate, cyanide, it is possible to suppress flotation, heavy chromate, sulfites not inhibit it. floatability bornite Between the copper ore and chalcopyrite.
In summary, the floatability of copper sulfide ore has the following rules:
1 Iron-free minerals, such as chalcopyrite, copper blue, etc., have similar buoyancy. It is less effective when they are inhibited by cyanide or lime.
2 Iron-containing minerals, such as chalcopyrite, porphyrite, etc., are susceptible to cyanide and lime suppression in alkaline media.
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