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1·Routine flotation-cell is replaced by Column flotation in coarse-flotation circuit, and cost of 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·In comparison with XJN-14 flotation machine, it gives such merits as high selectivity, large throughput, high solid content in froth, low energy consumption, less space required and low first cost.

通过与XJN-14型浮选机对比，表明FJC20型浮选机浮选选择性好、处理量大、泡沫浓度高、电耗低、占地面积小、购置费用低。

4·The production cost of 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.

在本研究中，以经过浮选处理的方铅矿精矿为原料，采用湿法直接制备铅酸电池用材料硫酸铅。