This work presents the results obtained during flotation of fine-grained apatite-bearing tailings provided from the Kovdor concentration plant in a laboratory cell and a pilot-scale column. Flotation studies were conducted on a sample containing >85 % particles passing 36 µm by using tall oil fatty acids in combination with polyoxyethylene cetyl ether (2 EO groups) as an alternative for nonylphenol ethoxylates. 45.5 % P₂O₅ recovery to a concentrate grade of 31.2 % P₂O₅ from 9.1 % P₂O₅ feed was achieved after rougher and one cleaner stage in a pilot-scale column using the mixed collector with phosphate modifier and starch as depressor.

这项工作介绍了在实验室单元和中试规模的塔中浮选 Kovdor 浓缩厂提供的细粒磷灰石尾矿时获得的结果。通过使用妥尔油脂肪酸与聚氧乙烯十六烷基醚（2 个 EO 基团）组合作为壬基酚聚氧乙烯醚的替代品，对含有 >85% 颗粒通过 36 µm 的样品进行浮选研究。在使用具有磷酸盐改性剂和淀粉的混合捕收剂作为中试规模塔的粗略和一个清洁阶段后，从 9.1 % P ₂ O ₅进料到精矿品位 31.2 % P ₂ O ₅的回收率为45.5 % P ₂ O ₅抑郁症。