Routine flotation-cell is replaced by Column flotation in coarse-flotation circuit, and costof product is reduced in great extent.
粗选设备设计选用了浮选柱代替常规浮选机，大幅度降低了生产成本。
2
A simple comparison between gravity thickening and flotation thickening was also made in terms of thickening performance and operational cost.
并对气浮浓缩和重力浓缩，进行了简单的技术经济比较。
3
The production costof PbSO_4 with lead oxide is expensive. It is researched to obtaining directly PbSO_4 used as lead-acid batteries by processing the flotation-galena concentrate.