关键词: 伟晶岩型锂辉石, 脱泥, 磁选, 中性调整剂, 组合捕收剂

Abstract: The Li2O grade of a pegmatite-type spodumene deposit in Hunan province is 1.35%. The main gangue minerals are quartz and feldspar， following with easily sliming minerals like chlorite and kaolinite. The traditional spodumene flotation process "three alkali and two soap" method has the disadvantages of large dosage of flotation reagents， long flotation time， poor flotation indexes， and the backwater is difficult to directly recycle. In order to realize the high-efficient recovery and utilization of lithium in the ores， the beneficiation experiments were carried out based on the characteristics of the raw ore and the process flow of desliming， magnetic separation and flotation was finally determined for the treatment of the ores. Under the condition of the grinding fineness of -0.074 mm accounting for 66.55%， ZT as the neutral regulator and ZB as the combined collector， the final lithium concentrate with Li2O grade of 6.05%， Li2O recovery rate of 79.77% and Fe2O3 content of 0.83% was obtained after "one roughing， two cleaning and two scavenging" in the flotation stage. The high efficiency recovery of lithium from spodumene was effectively realized， and the product reached the the first grade chemical product standard.

Key words: pegmatite-type spodumene, desliming, magnetic separation, neutral regulator, combined collector