Abstract In real flotation systems, the flotation separation of fluorite from calcite is a challenge due to the similar surface properties of these two minerals. The purpose of this paper is to develop a highly selective flotation collector for the separation. Propyl gallate (PG) was introduced as a collector for selective flotation separation of fluorite from calcite. The separation of fluorite from calcite without using any depressant can be achieved by using PG as the collector. The flotation mechanism of fluorite and calcite was studied by zeta potential measurements, adsorption, FT-IR and XPS analysis. The results indicated that phenolic hydroxyls were the functional groups of PG which can selectively adsorb on fluorite, and the adsorption amount of PG on the surface of fluorite was larger than on calcite.

中文翻译：

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没食子酸丙酯：一种用于从方解石中浮选分离萤石的新型捕收剂

摘要 在实际浮选系统中，萤石与方解石的浮选分离是一个挑战，因为这两种矿物的表面性质相似。本文的目的是开发一种用于分离的高选择性浮选捕收剂。引入了没食子酸丙酯 (PG) 作为从方解石中选择性浮选分离萤石的捕收剂。以PG为捕收剂，可以在不使用任何抑制剂的情况下实现萤石与方解石的分离。通过zeta电位测量、吸附、FT-IR和XPS分析研究了萤石和方解石的浮选机理。结果表明，酚羟基是PG的官能团，可以选择性地吸附在萤石上，萤石表面的PG吸附量大于方解石。