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Compare FIGS. 4 and 5 can be seen, many of the metal sulfide easily than the corresponding oxide chloride, chlorinated and chlorine is larger than the capacity of gaseous hydrogen chloride. Therefore, chlorination of metal sulfides is usually carried out using chlorine gas instead of gaseous hydrogen chloride as a chlorinating agent. Heavy ferrous metal sulfide ore is commonly used in flotation judges, and flotation concentrates are sent to smelters for treatment. Generally, they are not treated by chlorination.
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