新型捕收剂RA-92在低品位碳酸锰矿选矿中的应用

微细粒低品位锰矿由于颗粒间的非选择性聚集、浮选药剂用量大、浮选效率低等技术难题而致使其利用困难,造成大量浪费。在品位低于13%的锰矿浮选技术研究中,捕收剂最受关注,前人已研究了多种类型的捕收剂,所得精矿品位在16.9%~18.3%之间,回收率为56%~97%,回收率比较理想,但精矿品位总体不高。本文将新型捕收剂RA-92应用于湖南凤凰-花垣地区低品位碳酸锰矿(锰品位为10.7%)的选矿工艺中,实验研究了磨矿细度、pH值、抑制剂和捕收剂用量对浮选效果的影响,在最佳工艺条件下,精矿品位由原矿的10.7%提升至17.4%,回收率达到80.2%。研究表明RA-92对碳酸锰矿具有良好的捕收性能,浮选工艺相对简单且捕收剂用量少,浮选成本较低,可为此种捕获剂在微细粒低品位碳酸盐锰矿选矿中的应用得到推广。

Application of Novel Collector Dosage RA-92 in the Flotation Procedure of Low-grade Carbonate Manganese Ore

The fine grain low-grade manganese ore is difficult to be utilized due to some mineral processing technology problem, such as non-selective aggregation between ore particles, large dosage of flotation reagents, and low efficiency of flotation fine grain. Recent years, multiple types of collectors had been used for the flotation of low grade manganese ore (less than 13%), while the concentrate grade was 16.9% to 18.3%, the recovery was 56% to 97%.However the recovery rate had ideal effects, the concentrate grade was lower yet. In our work, RA-92 was selected as a new collector in the flotation of low grade manganese carbonate (grade of 10.7%) ore from Fenghuang-Huayuan area in Hunan. The effects of the grinding fineness, pH, inhibitors, and the collecting agent dosage were investigated and the optimum technological was obtained. The concentrate grade was up to 17.4% and recovery rate reached 80.2% in the closed circuit flotation test. It indicated that the new collector has better selectivity and stronger ability for collecting manganese carbonate. The collector RA-92 had good prospects in the low grade manganese carbonate due to the relatively simple flotation process, less dosage of collector and lower flotation costs. Case study of application of RA-92 in the flotation of low-grade manganese can provide support for practical application and promotion of new collector in flotation of fine-particle and low-grade manganese carbonate.