Abstract In this study, a selective depressant sodium alginate (SA) was used to improve the flotation performance of separating apatite from dolomite. The flotation results show that SA can completely depress dolomite with a slight effect on apatite flotation in pH 8–11. The contact angle tests and adsorption tests indicate that depressant SA absorbed onto both apatite and dolomite surfaces and the adsorption intensity of the latter was greater than that of the former. The FTIR and XPS analysis indicate that SA absorbed onto apatite surface mainly through hydrogen bonding between hydroxyl groups on apatite surface and hydroxyl and carboxyl groups on polymer SA, while onto dolomite surface mainly through chemical chelating between Ca on dolomite surface and hydroxyl and carboxyl groups on polymer SA. Therefore, the adsorption of SA on dolomite was stronger than on apatite, which resulted in a selective depression for dolomite

中文翻译：

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海藻酸钠在磷灰石和白云石浮选分离中的作用

摘要 本研究采用选择性抑制剂海藻酸钠（SA）提高浮选分离磷灰石与白云石的性能。浮选结果表明，在 pH 8-11 时，SA 可以完全抑制白云石，对磷灰石的浮选影响很小。接触角测试和吸附测试表明，抑制剂SA吸附在磷灰石和白云石表面，后者的吸附强度大于前者。FTIR和XPS分析表明，SA主要通过磷灰石表面的羟基与聚合物SA上的羟基和羧基之间的氢键吸附在磷灰石表面，而吸附到白云石表面的主要是通过白云石表面的Ca与表面的羟基和羧基之间的化学螯合。聚合物 SA。所以，