Experimental research on ore-dressing in a large-scale tungsten-molybdenum mine
The molybdenum oxidation rate of a large-scale tungsten-molybdenum mine reaches 42.45%.The intimate association of molybdenum,tungsten,iron,and fluorite minerals,with fine particle size,and high content of calcium-magnesium silicates,carbonates,and clay minerals,distributed extremely uneven,poses challenges in ore-dressing.To address this complexity in processing polymetallic ores,an industrializable and relatively simple crushing and grinding-magnetic separation-desliming-flotation process was adopted.This process yielded molybdenum sulfide concentrate(containing 45.76%molybdenum),molybdenum oxide-tungsten oxide concentrate(containing 15.88%molybdenum and 22.65%tungsten),and iron concentrate(containing 63.11%iron).The recovery rates of molybdenum,tungsten,and iron were 67.75%,51.84%,and 36.44%respectively,achieving effective resource recovery.Pre-desliming before flotation facilitates smooth flotation operations,reduces reagent consumption,and stabilizes the recovery of valuable minerals.
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