在国外,美国拥有一种由Marcona公司研制的Cu(?)on机组,可以用于无表水的尾矿库,也可用于有表水的尾矿库作水下开采,但在水下开采时,砂泵的电机设置在水而以上用多轴承的长轴驱动深埋于砂层中砂泵叶轮,故机械结构复杂,设备自重较大。设备费昂贵。 Abroad, the United States owns a Cu (?) On unit developed by Marcona Company, which can be used for surface water-free tailings ponds, tailings ponds for surface water, but for underwater mining , The motor of the sand pump is set at water, and the long-axis driven by the multi-bearing drives the sand pump impeller deeply buried in the sand layer. Therefore, the mechanical structure is complex and the weight of the equipment is heavy. Equipment costs expensive.