Originally Posted by
donh54
Lithium is typically found in salt flats in areas where water is scarce. The mining process of lithium uses large amounts of water. Therefore, on top of water contamination as a result of its use, depletion or transportation costs are issues to be dealt with. Depletion results in less available water for local populations, flora and fauna.
Not really the typical case any more. Lithium is mined from three types of deposits: brines, pegmatites and sedimentary rocks. Continental brines and pegmatites (or hard-rock ore) are the main sources for commercial lithium production. Lithium minerals containing lithia (Li2O), such as spodumene, petalite and lepidolite, are mined from open-cut and underground mines, with the largest producers being Australia, China, Zimbabwe and Canada.
Lithium-rich brines from salt lakes are located in the Andes of Chile and Argentina and in the Himalayas of China. Not sure about in China, but the mining and processing of lithium from salt lakes in South America is on the decline for a number of reasons, which include both environmental concerns and economic viability. These mines are rapidly becoming less competitive in a market where new technology is emerging all the time.
Toxic chemicals are used for leaching purposes, chemicals requiring waste treatment. There are widespread concerns of improper handling and spills, like in other mining operations around the world.
As above, this is rapidly becoming less typical of the industry as the older mines are shut down and replaced with new technology. Australia's largest and longest established producer, the Greenbushes Lithium Operations has two processing plants, one producing technical-grade lithium concentrates and one producing chemical-grade lithium concentrate. Ore containing Li2O is fed into the processing plants which upgrade the lithium mineral, using gravity, heavy media, flotation and magnetic processes, into a range of lithium concentrates for bulk or bagged shipment.
Various operating modes are used in the processing plants to produce a variety of different lithium concentrates to meet specific customer requirements. These processes are no different to what I have been working with for many years in both gold and iron ore processing, and use little if any chemicals.
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