Mining of non-ferrous metals
The non-ferrous metals industry includes geological exploration, mining, mineral processing, smelting and processing. The content of non-ferrous metals in ores is generally low. In order to obtain 1 ton of non-ferrous metals, it is often necessary to mine ore of hundreds of tons or more. Therefore, the mine is an important foundation for the development of the non-ferrous metal industry. Non-ferrous metal ores are often symbiotic with a variety of metals, so it is necessary to rationally extract and recover useful components for comprehensive utilization in order to make rational use of natural resources. Many kinds of chemical products such as rare metals, precious metals and sulfuric acid are recovered in the process of processing non-ferrous metal ores or intermediate products, as well as slag and soot. In the production process of non-ferrous metals, a large amount of waste gas, waste water and waste residue are usually produced, which contain various useful components, sometimes containing toxic substances, and some non-ferrous metals are also toxic. Therefore, in the process of producing non-ferrous metals, attention must be paid to comprehensive utilization and environmental protection.
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