我国黑钨矿多呈急倾斜薄矿脉赋存,分支、复合、尖灭,变化较多。由于矿石与围岩比较稳固,主要用浅眼留矿法回釆,致使出窿矿石含有大量围岩,须在重选前预先丢弃。这对增加生产能力、降低成本、提高技术经济指标都十分重要。三十年来国内除个别黑钨选厂外,皆以手选辅以其它方法来丟弃废石。由于围岩性质的 Most of the wolframite in our country is steeply dipping thin veins, branches, complex, pinch out, change more. Due to the relatively stable ore and the surrounding rock, the main method of shallow mine retention recovery, resulting in a large number of ore out of ore, to be re-election prior to discard. This is to increase productivity, reduce costs, improve technical and economic indicators are very important. In the past 30 years, apart from some black tungsten processing plants in the country, hand-made auxiliary methods have been adopted to discard waste rock. Due to the nature of the surrounding rock