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我矿1957年选矿回收率在客观不利因素出窿原矿品位較前降低0.171％;回收副产品矿石——鉍矿,使鎢金屬量損失于鉍精矿中(为出窿矿石金屬量的0.374%)——的限制下,經过多次的流程測定、改进,使选矿总回收率較前提高2.62%(絕对数)。一、加强重选前的手选作业。及早丟出尾矿,不但使破碎机械的磨損和动力消耗減少,运輸費用減少,而且也因丢出的廢石,其品位可以降低到最低的限度和提高付洗原矿品位,使总回收率提高。一年來选出廢石量127025.89吨,这些廢石如果不予先选出,进入机选厂后,以机选厂尾矿品位0.1185%計算,則被这些廢石所带出的鎢金屬量为150.53吨,也就是要比予先选出多损失金屬量104.48吨(廢石品位是0.036%)。如何加強廢石选出作业呢?
In 1957, beneficiation recovery rate of mine was 0.171% lower than that of former unfavorable factors. The by-product ore-bismuth ore was recovered and the amount of tungsten metal was lost in bismuth concentrate (0.374% of the amount of ore metal out of ore) - After the limit, after many process measurement, improvement, so that the total beneficiation recovery rate increased by 2.62% (absolute). First, strengthen hand selection before re-election operation. Lost the tailings early, not only to reduce the wear and tear of crushing machinery and reduce transport costs, but also because of discarded waste rock, the grade can be reduced to a minimum and improve the quality of the ore washed to make the total recovery improve. One year to choose the amount of waste rock 127,025.89 tons, if not selected first of these waste rock into the machine plant, the machine tailings grade 0.1185% calculation, the amount of tungsten metal is brought out of these waste rock is 150.53 tons, which means that 104.48 tons of more lost metal (0.036% of the waste rock grade) than the first selected. How to strengthen the selection of waste rock jobs?