en.Wedoany.com Reported - On June 23, 2026, China's Zangge Mining Co., Ltd. ("Zangge Mining", 000408.SZ) announced that its wholly-owned subsidiary, Golmud Zangge Lithium Co., Ltd., has obtained a project filing notice from the Qinghai Provincial Department of Industry and Information Technology, officially launching a lithium ion recovery technology upgrade project from lithium precipitation mother liquor. The total project investment is 32 million yuan, fully funded by the company's own capital. The project construction period is from June to December 2026.

Headquartered in Golmud City, Qinghai Province, Zangge Mining is one of China's key salt lake lithium extraction enterprises, with mature lithium resource development capabilities in the Qarhan Salt Lake. This tech upgrade is implemented on the existing 10,000 tons/year lithium carbonate production facility at the Qarhan Salt Lake, requiring no new land use or new building construction, only adding supporting equipment such as mobile continuous beds and pH adjustment mixing tanks, directly connected to the existing lithium-sodium separation and lithium precipitation mother liquor recovery system. The core highlight is that no new brine consumption is added throughout the process, with all incremental output coming from the recovery of lithium ions lost in the lithium precipitation tail liquid.

This tech upgrade adopts a cyclic adsorption process, leveraging the company's deep expertise in adsorption lithium extraction technology accumulated over years of operating in high magnesium-lithium ratio salt lakes, combined with its proprietary titanium-based adsorbent system, to specifically recover residual lithium from the lithium precipitation mother liquor, significantly improving the overall lithium recovery rate across the entire process. Zangge Mining's original "mobile continuous bed adsorption + one-step lithium precipitation" technology has already reached internationally leading levels, with an overall lithium recovery rate exceeding 80%. After the project is put into operation, it will add 2,000 tons of battery-grade lithium carbonate capacity annually.

This tech upgrade represents a typical intensive growth model, with unit incremental investment far lower than building new production lines. By recycling lithium from the mother liquor, the project significantly reduces lithium resource loss, embodying the concept of sustainable comprehensive development of salt lake resources. This industrial-scale transformation of mother liquor recovery for the 10,000-ton facility is a large-scale validation of Zangge's cyclic adsorption mother liquor lithium extraction technology, which can be replicated and applied to the company's other lithium projects in the future.

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