Method for extracting lithium from clay containing lithium
A clay and leaching solution technology, applied in the field of lithium-containing clay extraction, can solve the problem of lack of universality, and achieve the effects of avoiding a large amount of limestone, simple impurity removal, and reducing high prices.
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[0043] Example one
[0044] Take 500ml of water, add 40g Na2SO4, 40g K2SO4 to make a solution, then add 200g of ground clay and 40g of CaCO3, stir evenly and filter to obtain 440g of clay mixture, hand-rolled into balls, roasted at 1000℃ for 1.5h, cooled and ground to P100 150um. 205 g of powder was obtained. Add 400ml of water and stir for 40min, and then filter to obtain 330ml of clay extract and 184g of clay residue.
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[0045] Example two
[0046] Take 500ml of water, add 60g Na2SO4, 40g K2SO4 to make a solution, then add 200g of ground clay and 40g of CaCO3, stir evenly and filter to obtain 460g of clay mixture. After manually rolling into a ball, it is calcined at 900°C for 2h, cooled and ground to P100 125um. 209g powder. Add 400ml of water and stir for 50min, and then filter to obtain 350ml of clay extract and 186g of clay residue.
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[0047] Example three
[0048] Take 150ml of water, add 50g of Na2SO4, 40g of K2SO4, and then add the ground 200g of clay and 40g of CaCO3 to obtain 470g of clay mixture. After rolling into a ball, calcined at 950°C for 2h, cooled and ground to P100 150um to obtain 210g of powder. Add 400ml of water and stir for 40min, and then filter to obtain 300ml of clay extract and 200g of clay residue.
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