Solution Chemistry Study of Salt-type Mineral Flotation Systems: Role of Inorganic Dispersants
Solution Chemistry Study of Salt-type Mineral Flotation Systems: Role of Inorganic Dispersants
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DOI：
10.1021/ie020729b
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发表时间：
2003-03
影响因子：
4.2
通讯作者：
Hu Yuehua;and Ruan Chi;Zhenghe Xu
中科院分区：
文献类型：
--
作者：
Hu Yuehua;and Ruan Chi;Zhenghe Xu
通过溶液化学计算研究了盐类矿物与常见无机浮选抑制剂的相互作用。根据构建的条件溶度积极限和硅酸钙和磷酸盐在萤石、方解石和磷灰石单一矿物系统中的实际溶度积线，确定了相应矿物悬浮液中硅酸盐和磷酸盐的临界沉淀pH或浓度。这些值为解释浮选试验的结果提供了基础依据，并且与 z 电位和分散剂吸附测量的结果一致。硅酸钙或磷酸钙在萤石和方解石上的表面沉淀被确定为主要的抑制机制。根据系统的溶液化学计算，确定了使用Na2SiO3和Na3PO4作为抑制剂对不同盐型矿物的选择性抑制条件。
Interactions of salt-type minerals with common inorganic flotation depressants were investigated through solution chemistry calculations. From the constructed conditional solubility product limits and the actual solubility product lines of calcium silicate and phosphate in fluorite, calcite, and apatite single-mineral systems, the critical precipitation pH or concentration of silicate and phosphate in the corresponding mineral suspensions was determined. These values provided a fundamental basis for interpreting the results of flotation tests and were in line with the results of ζ-potential and dispersant adsorption measurements. The surface precipitation of calcium silicate or phosphate on fluorite and calcite was identified as a major depression mechanism. Selective depressing conditions for different salt-type minerals using Na2SiO3 and Na3PO4 as depressants were determined on the basis of solution chemistry calculations of the systems.