The Chailhan Salt Lake in the Qaidam Basin has a storage capacity of 8.337 million tons of lithium chloride. It is an important lithium resource in China and one of the seven largest lithium resource bases in the world.
The lithium resources of Chaerhan Salt Lake have two characteristics compared with other salt lakes at home and abroad:
1) The ratio of magnesium to lithium is high, generally above 500;
2) The content of lithium is low, generally only between 200 and 300 mg/L, so extracting lithium from such high-magnesium and low-nickel brine is a worldwide problem.
Center researchers for the special circumstances Salt Lake lithium resources and advantages in hydrometallurgical and materials research, technical route proposed extracting lithium ion exchange adsorption method.
After 20 years of research, it has completed small experiments, bench experiments, and expanded experiments. In 2006, it jointly invested 10 million yuan with Qinghai Salt Lake Industry Group to establish an industrial test device for producing 200 tons of lithium carbonate. After nearly 2 years. Operation further validates technical and economic feasibility.
At the appraisal meeting organized by the Science and Technology Department of Qinghai Province, the experts at the meeting agreed that the lithium extraction process in the center of the Chaerhan Salt Lake has been at the international advanced level. In 2007, our center and Qinghai Salt Lake Industry Group jointly established Qinghai Salt Lake Lanke Lithium Industry Co., Ltd. The company has completed the annual production of 10,000 tons of lithium carbonate equipment in 2008 with a total investment of about 530 million yuan. In 2009, the project entered the trial and trial production phase.
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