Explanation

The process of extracting metals or their compounds from ores using high-temperature heating. Two kinds of melts are usually formed in the process: one is slag fused by gangue, flux and fuel ash, and the other is liquid metal or matte containing a small amount of impurities, so it is also called melting. It can be divided into three categories according to the way: ① reduction melting uses coke as the heating agent, combustion produces high temperature, and at the same time, it uses the reducing agent to reduce the metal oxide or sulfide in the ore; ② matte making melting: through melting, impurities are slag forming, and the metal content in the matte is increased, which is mainly used to treat vulcanization I or vulcanization ore; ③ Oxidation converting is like oxygen converting molten iron in converter, removing or reducing carbon element and removing Si, S, P and other impurity elements in molten iron to obtain qualified molten steel, or converting copper matte with air or oxygen enriched air to obtain crude copper.

Classification