The reporter recently learned from the Qinghai Salt Lake Research Institute of the Chinese Academy of Sciences that the “gradient coupled membrane separation technology†with independent intellectual property rights jointly developed by the institute and Minmetals Salt Lake Co., Ltd. has been successful in the development of salt lake lithium resources. Lithium carbonate products went offline smoothly. This move marks another breakthrough in the development of the Qinghai Salt Lake lithium resource.
According to the person in charge of the Qinghai Salt Lake Research Institute of the Chinese Academy of Sciences, Yiliping Salt Lake brine has rich lithium resource reserves, but its high magnesium-to-lithium ratio and low lithium resource grade restrict the development and utilization of lithium resources. The research team developed the membrane separation brine through in-depth research on the mass transfer law of each ion in the membrane separation process, the correlation between the magnesium-lithium separation effect, the concentration of lithium concentration and the conductivity, and the mechanism of the influence of impurity ions on the membrane separation process. Pretreatment industrialization device.
This technology uses low-lithium brine as the raw material after potassium precipitation in Yiliping Salt Lake, makes full use of the characteristics of different membrane separation processes, adopts a pure physical process, carries out brine pretreatment, high-efficiency separation of magnesium and lithium, and high-rate enrichment of lithium, a successful breakthrough The technical bottleneck of the engineering application of "gradient coupled membrane separation technology" has been improved, which has improved the separation effect of magnesium and lithium and the recovery rate of lithium. It has the characteristics of low energy consumption and no pollution, and realizes the recycling of water resources. (Reporter Zhang Yun)
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