Re-election of Spodumene from Lithium Processing Tailings in Keeryin, Sichuan

This is an essay in the field of mineral processing engineering. In order to comprehensively evaluate the feasibility of spodumene beneficiation of certain lithium tailings in Sichuan, the mineralogy study of the lithium tailings beneficiation process and the test study of the whole beneficiation process were carried out. Through MLA/AMICS automatic mineral analysis, LA-ICP-MS laser ablation in-situ analysis and other technical means, the mineral composition of the tailings sample and the occurrence state of lithium in the sample were found; On the basis of a series of exploratory tests, the lithium separation process of "grinding-desliming-floating" was determined. For the lithium tailings with a Li₂O grade of 0.51%, the high-efficient spodumene collector EM-PN10 is used to obtain a flotation spodumene concentrate with a Li₂O grade of 4.32% and a Li₂O recovery of 60.23% through a closed flotation process of one roughing, one sweeping and four finishing. After the flotation lithium concentrate is subjected to high-intensity magnetic separation, a spodumene concentrate with a Li₂O grade of 5.07% and a recovery of 59.21% (relative to the raw ore) is finally obtained. The recovery and utilization index of spodumene determined by the test can provide certain technical support for the utilization of this kind of spodumene tailings.