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小寺沟铜矿是一个主产钼、副产铜的井下内燃无轨实验矿山。原矿品位钼0.7—0.8%、铜0.12—0.20%;回收率钼75%左右、铜50%左右。在确保钼精矿品位和回收率前提下,采取提高铜选矿指标的措施来提高矿山经济效益。1983年选铜工艺采用铜硫混合精矿再磨再选,用石灰抑制黄铁矿,黄药捕收铜,使铜精矿品位达13.11%(在这之前,铜硫混合精矿作为铜精矿出售)。但是,1986年1—5月,铜精矿品位下降到10.81%,主要是由于年初把球磨机的生产能力由38吨/台·时提高到45吨/台·时,影响了磨矿产品粒度特性,造成铜混合浮选回收率下降。为此,我们在混选中加入黄药5克/吨(1985年粗选中不加),虽
Xiaosigou copper deposit is a main production of molybdenum, copper by-product of mine underground track experiment. Ore ore molybdenum 0.7-0.8%, 0.12-0.20% copper; recovery of about 75% molybdenum, copper about 50%. In ensuring the grade and recovery of molybdenum concentrate on the premise of measures to improve the indicators of copper beneficiation to improve mine economic benefits. In 1983, the process of copper selection using copper and sulfur mixed concentrate and then re-election, inhibition of pyrite with lime, xanthate copper, the copper concentrate grade up to 13.11% (before this, copper and sulfur mixed concentrate as copper concentrate Mine for sale). However, from January to May 1986, the grade of copper concentrates dropped to 10.81% mainly due to the fact that the ball mill production capacity was increased from 38 t / t to 45 t / t at the beginning of the year, affecting the particle size characteristics of the grinding products , Resulting in a decrease in copper mixed flotation recovery. For this reason, we added xanthate 5g / t in the mixed selection (not added in the 1985 rough selection), though