PROSPECTS FOR INVOLVEMENT OF LOW-GRADE MOLYBDENUM AND TUNGSTEN CONCENTRATES IN METALLURGICAL PROCESSING

摘要

The expediency of involving low-grade concentrates and middlings in metallurgical processing is substantiated. The possibility of efficient processing of low-grade molybdenite (15-20% Mo) and scheelite (7-10% WO_3) concentrates by hydrometallurgical and combined methods (with a preliminary roasting of scheelite concentrate) is shown. Technologies aimed at preparing synthetic scheelite and powellite suitable for smelting ferrotungsten and ferromolybdenum are developed. Extraction of metals from ores into end products is greater by 15-20% than traditional treatment methods: flotation with preparation of conditioned concentrates and subsequent processing. This provides more rational use of natural resources.