The main causes of very high level of consumption of modifying reactants of sulfide group at copper-molybdenum plants are shown. The results of laboratorial and pilot-industrial testings of the technology of selection of copper-molybdenum concentrates with usage of nitrogen are presented; putting this technology into practice at the concentration plant of "Erdenet" JSC allows to cut the consumption of sulfuric sodium more than by 2 times without any decrease of technological parameters of flotation.
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