The effect of hydroxypropyl starch (HPS) on the flotation separation of fluorite from calcite using sodium oleate (NaOl) as a collector was studied. Micro-flotation results of single minerals showed that both fluorite and calcite presented good floatability in the presence of NaOl. However, by adding HPS before NaOl, the calcite flotation recovery was selectively reduced. The flotation of artificially mixed minerals confirmed that an efficient separation of fluorite from calcite could be achieved using the reagents scheme of HPS/NaOl. Zeta potential measurements demonstrated that HPS prevented the NaOl adsorption onto the calcite surface while it did not inhibit the interaction of NaOl with the fluorite surface. Fourier Transform Infrared (FT-IR) analysis was also revealed that the selective adsorption of HPS onto the calcite surface.

研究了羟丙基淀粉（HPS）对以油酸钠（NaOl）为捕收剂的萤石与方解石浮选分离的影响。单一矿物的微浮选结果表明，在NaO1存在下，萤石和方解石均表现出良好的漂浮性。然而，通过在NaOl之前添加HPS，方解石浮选回收率选择性降低。人工混合矿物的浮选证实，使用HPS / NaOl试剂方案可实现萤石与方解石的有效分离。Zeta电位测量结果表明，HPS阻止了NaO1吸附在方解石表面上，而没有抑制NaOl与萤石表面的相互作用。傅立叶变换红外（FT-IR）分析还表明，HPS在方解石表面的选择性吸附。