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。

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。

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。

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。