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美国蒙太果阿特公司从1962年在已用充填法开采了将近50年的该地区进行回采。目前,与采矿同时又安装了重介质选矿设备,该设备能将占原矿75％的脉石废弃,在保持选矿厂浮选工段现有的处理量的条件下,选矿厂的日处理量由90提高到360吨。这个矿床脉群主要为硫化矿,在开采过的矿带中已受到部分氧化。贫化矿石的脉石实际上不含重矿物。随着重介质选矿工段投入生产,采矿就转入回采;入厂的块矿平均含2％铅、3％锌和40(克/吨)银。入厂的矿石用颚式碎矿机粗碎,旋回碎矿机细碎
The United States Montage Goethe company from 1962 in the mining method has been exploited in the region for nearly 50 years for mining. At present, with the mining at the same time installed a heavy medium beneficiation equipment, the device can account for 75% of the ore gangue discarded in maintaining the flotation station concentrator existing treatment capacity under the conditions of processing capacity of the concentrator from 90 Increase to 360 tons. This deposit is mainly sulfide ores, which have been partially oxidized in mined mines. Diluted ore gangue does not actually contain heavy minerals. As the HM dressing section is put into production, mining is diverted to mining; the lump ore at the plant contains an average of 2% lead, 3% zinc and 40 (g / t) silver. Into the factory with a jaw crusher coarse crushing, crushing crusher crushing