Collectors commonly used in spodumene flotation include anionic collectors such as fatty acids and their soaps, such as oxidized paraffin soap, naphthenic acid soap, tal oil, oleic acid, alkyl sulfate and xanthate. At the same time, the amine cation collector is also an effective collector for spodumene flotation. In addition, some fuel oils such as diesel oil are often used in combination with fatty acid collectors and are used as auxiliary collectors. China Xinjiang company Keketuohai rare metals mining company with a lithium processing plant (paraffin oxide soap + naphthenic acid soap) flotation lithium minerals, some of the major foreign lithium beneficiation plant almost all of oleic acid or tall oil as collector Agent. Finding a multi-functional agent with strong ability to capture lithium minerals and selectivity is the main direction of current collector research work.
According to reports, the new drug YZB-17, which was successfully developed by Central South University, has high efficiency, good selectivity and strong foaming ability. It replaces oxidized paraffin soap and naphthenic acid soap to float the spodumene of the rare cocaine metal mine in Xinjiang. Tests and industrial tests have shown that the recovery rate of spodumene concentrate is increased by 9.46% under the same dosage of the agent, which improves the beneficiation efficiency.
Combination therapy is also a hot spot in flotation reagent research. The Sichuan Institute of Metallurgy has developed the PF series of collectors. The results of the research at the Jinchuan Company's concentrator show that the PF combination collector is recycled at a lower temperature than when the concentrate grade is equivalent to the oxidized paraffin soap. The rate remains basically unchanged; Xinjiang Cocoa Sea Company's rare metal company lithium plant uses a combination of naphthenic acid soap and oxidized paraffin soap to improve the selection index; the US Jinsishan plant uses a combination of Tal oil and ethylene glycol. There are also reports of a combination of new collectors, such as chelating collectors combined with oleic acid, which have also achieved satisfactory targets.
2) gangue mineral inhibitors
In many granitic pegmatite deposits, gangue minerals are mostly silicate minerals. The effect of silicate gangue minerals on spodumene ore is as follows: firstly, it is an electrical action, which easily forms a mica cover on the surface of spodumene, which affects its recovery; in addition, it is easy to adsorb on the surface of spodumene and then Floating up, affecting the quality of concentrate. Therefore, the study of gangue inhibitors has been an important aspect of the study of spodumite flotation reagents. Domestic and industrial use silicate gangue minerals inhibitors are mainly NaF, Na2S, oxalic acid, tartaric acid, citric acid, sodium silicate, starch, lignin sulfonate, phosphate, sodium hexametaphosphate and the like. However, the selectivity and temperature stability of these agents are poor, and there are major problems in the amount of drugs and environmental protection. For example, Na2S is a selective inhibitor used in the practice of flotation of rare metal ore in the Cocoa Sea in Xinjiang. Because Na2S is easily damaged by oxidation, the process operation is complicated, the production fluctuation is large, and Na2S has certain Toxic, this agent cannot meet today's environmental requirements.
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