An investigation was carried out to determine the effects of collector concentration on the grade and recovery in the flotation of middle group 1-3 Platinum Group Metal (PGM) ore mixture. The ore mixture pulp at a relative density of 1.29 was subjected to “bead milling” test, particle size distribution analysis and the 55% passing 75 μm was froth floated at 180, 200 and 220 g/t dosages of sodium isobutyl xanthate (SIBX) and 30 and 80 g/t of Senfroth and Sendep 30D frother and depressant, respectively. The results obtained indicated the predominance of the <38 μm PGM values in the ore and confirmed the need for tertiary milling for better liberation of the PGMs. The grade of the PGM concentrate obtained when dosing at 200 g/t of sodium isobutyl xanthate was highest at 94 g/t and gave the lowest recovery of 53%. The 180 g/t SIBX dosage resulted in highest PGM recovery of 70% and lowest grade of 84 g/t, while dosing at 220 g/t SIBX gave average PGM grades of 90 g/t and recoveries of 60%. The results obtained thus showed that that an SIBX dosage of 180 g/t SIBX would be appropriate when higher recoveries are targeted, while 200 g/t dosage will yield higher grades.
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机译：进行了一项调查，以确定捕收剂浓度对中间1-3组铂族金属（PGM）矿石混合物浮选的品位和回收率的影响。对相对密度1.29的矿石混合浆进行“珠磨”测试，粒度分布分析，并将55％通过的75μm泡沫以180、200和220 g / t剂量的异丁基黄原酸钠（SIBX）浮选Senfroth和Sendep 30D起泡剂和抑制剂分别为30和80 g / t。获得的结果表明，矿石中PGM值<38μm占优势，并确认需要进行三次研磨才能更好地释放PGM。当以200克/吨异丁基黄药酸钠计量时获得的PGM浓缩物的品位最高，为94克/吨，最低回收率为53％。 SIBX的180 g / t剂量导致PGM的最高回收率达到70％，最低品位为84 g / t，而SIBX的剂量为220 g / t时，PGM的平均品位为90 g / t，回收率达到60％。因此，获得的结果表明，当目标更高的回收率时，180 g / t SIBX的SIBX剂量是合适的，而200 g / t的剂量将产生更高的品位。
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