The natural copper is red, with black oxide film on the surface, the relative density is 8.4~8.94, and the ductility is strong. It is soluble in dilute HNO3, and the solution is sky blue after adding ammonia.
The natural copper ore processing and production process mainly includes three processes: crushing, grinding, and beneficiation. In the crushing process, the three-stage closed-circuit crushing is modern and suitable for high-hardness copper ore crushing. It can complete the crushing and partial dissociation of the ore, thereby improving the subsequent grinding efficiency; in the grinding process, the second-stage and one-closed grinding is a grinding mill. The ore process can make the copper ore grinding more fully; among the beneficiation processes, the more successful new processes that have emerged in recent years are representative of the mixed flotation process.