In this study, the effect of flaxseed gum (FG) on selective flotation separation of fluorite from calcite using sodium oleate (NaOl) as collector was investigated. Micro-flotation tests demonstrated that FG could selectively inhibit the flotation of calcite but barely influence that of fluorite. Zeta potential and adsorption test indicated that large amounts of FG were adsorbed on calcite surface, while, as for fluorite, the adsorption of FG was negligible. The selective adsorption of FG would further affect the adsorption of NaOl as well as the flotation behaviour. FTIR and XPS analysis results illustrated that the carboxyl groups (–COOH) of FG could be chemically chelated with the calcium ions species of calcite surface, which further prevented the adsorption of NaOl. In this way, the effective flotation separation of fluorite from calcite could be achieved.

在这项研究中，研究了亚麻籽胶（FG）对以油酸钠（NaOl）为收集剂的萤石与方解石选择性浮选分离的效果。微浮选试验表明，FG可以选择性地抑制方解石的浮选，而对萤石的浮选几乎没有影响。Zeta电势和吸附试验表明，方解石表面大量吸附了FG，而对于萤石，FG的吸附可以忽略不计。FG的选择性吸附将进一步影响NaOl的吸附以及浮选行为。FTIR和XPS分析结果表明，FG的羧基（–COOH）可与方解石表面的钙离子物质化学螯合，从而进一步阻止了NaOl的吸附。这样，