微细粒锂辉石强化浮选回收试验研究

Experimental Study on Enhanced Flotation Recovery of Fine Spodumene

经过长期采选开发利用,优质锂辉石资源日益匮乏,大量锂辉石矿因嵌布粒度细、黏土矿物含量高,导致其浮选过程矿化效果差、分离回收困难。为实现该类矿产资源高效利用,开发具有普遍适应性的微细粒锂辉石选矿工艺及方法,本试验对其进行了详细的研究。结果表明,在新型捕收剂ZH 体系下延长浮选过程流体的剪切时间,以不脱泥直接浮选工艺分选锂辉石,在原矿含Li2O 1.51%的情况下,获得了含Li2O 5.86%、回收率83.41%的较佳浮选指标。研究开发的以-COO^-及- AsO(OH)2为主要作用官能团的捕收剂ZH选择性良好,两种官能团具有较好的协同效应,有利于锂辉石矿物选择性捕收,而优化浮选流体环境可显著提高矿浆分散性,降低细泥对目的矿物罩盖影响,提高锂辉石分离效率。

After long-term mining and mineral processing, high-quality spodumene resources are increasingly scarce. A large number of spodumene ores have poor mineralization effect and difficult separation and recovery due to fine particle size and high clay mineral content. In order to realize the efficient utilization of this kind of mineral resources and develop the general adaptability of fine spodumene beneficiation process, this paper carried out a detailed beneficiation test. The results show that under the new collector ZH system, the concentrate containing 5.86% Li2O and 83.41% recovery can be obtained by prolonging the fluid shear time in flotation process and separating spodumene by direct flotation without desliming. The developed collector ZH with -COO^- and -AsO(OH)2 as the main functional groups has good selectivity. The two functional groups have good synergistic effect, which is conducive to selective collection of spodumene minerals. Optimizing flotation fluid environment can significantly improve the dispersion of pulp, reduce the cover of fine mud on minerals and improve the separation efficiency of spodumene.