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目前,在全苏锰矿选矿厂内,积存着0.5—0mm的细粒级锰矿泥,大约有300—400万t。但在工业生产中,采用泡沫分选与浮选工艺不能明显降低锰的损失。其主要原因是浮选粒度下限为0.02mm,泡沫分选粒度下限为0.16mm。另外,采用传统的螺旋分级机:水力旋流器、径向浓缩机等设备处理入选前的泥浆效率低。致使20～25％的锰无法回收。
At present, in the whole Soviet Union manganese ore beneficiation plant, the accumulation of 0.5-0mm fine grade manganese ore, about 300-400 million t. However, in industrial production, the use of foam separation and flotation process can not significantly reduce the loss of manganese. The main reason is that the lower limit of flotation particle size is 0.02mm and the lower limit of bubble size is 0.16mm. In addition, the use of traditional spiral classifier: hydrocyclones, radial concentrator and other equipment to deal with pre-election mud low efficiency. Resulting in 20 ~ 25% of the manganese can not be recycled.