某大型钨钼矿选矿试验研究

Experimental research on ore-dressing in a large-scale tungsten-molybdenum mine

某大型钨钼矿的钼氧化率高达42.45%,钼、钨、铁、萤石等矿物嵌布关系密切、粒度细,钙镁硅酸盐、碳酸盐及黏土矿物含量高且分布极不均匀。针对这一复杂难选多金属矿石,采用可工业化、相对简单的碎磨—磁选—脱泥—浮选工艺流程,可获得硫化钼精矿(含钼45.76%)、氧化钼-氧化钨精矿(含钼15.88%、含钨22.65%)、铁精矿(含铁63.11%),总钼、总钨、总铁回收率分别为67.75%、51.84%、36.44%,实现了矿产资源的有效回收。浮选前进行预先脱泥,有助于确保浮选流程顺畅、降低药剂耗量及稳定有价矿物回收指标。

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.