Mercury is widely used. According to statistics, there are more than 3,000 items, which are mainly used in medicine, agriculture, pharmaceuticals, electrical equipment, industrial control instruments and general purposes of laboratories.
The mineral used to extract mercury is mainly cinnabar, ie HgS (86.2% Hg, 13.8% S).
Production principle
Mercury consists of two main processes, namely calcination roasting (distillation) of mercury ore and condensation of mercury vapor. When mercury ore calcination in an oxidizing atmosphere and a temperature of 650-750 deg.] C, i.e., mercury sulfide direct oxidation of metal mercury, with the furnace gas evaporated in the condenser system, then condensed into metallic mercury, mercury soot while output part, be separately Treatment can recover mercury from it.
The main chemical reaction is: HgS + O 2 = SO 2 + Hg + 4S
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