Method for preferentially extracting lithium and recycling valuable metals from waste ternary lithium ion battery positive electrode materials
A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of resource recycling of waste batteries, can solve problems such as high cost of recycling lithium elements, low-quality lithium products, and complicated processes, and achieves low prices, strong hydrophobicity, and high-efficiency treatment processes. simple effect
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[0035] Example 1
[0036] Weigh 50g used nickel-watery-rich three-dimensional lithium ion battery positive electrode material, add 24 mL of 60% concentrated sulfuric acid, mix well, mix well, mix the material is loose, and the material is placed in a boat, calcined with a calcined furnace, calcined temperature 400 ° C, Calcination for 3 h then naturally cools. After the calcination, the material was taken out, 150 ml of pure water was added to normal temperature leaching, the leaching process was added to the pH of the sodium hydroxide solution to adjust the pH of 10.4, the leaching time was 1 h, and the leaching was filtered, the filtrate slag sampling detection, the filtrate was precipitated and ion exchange Methods The lithium carbonate products were added to the addition of sodium carbonate after addition. After the filter residue is pulled up from 1: 5, heated to 60 ° C, and the sulfuric acid solution is added to adjust the pH 1.0, and the reaction is 20 min, and the sulfuric...
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[0037] Example 2
[0038] Weigh 500g used nickel-manganese three-dimensional ion battery positive electrode material, add 145 mL of 98% concentrated sulfuric acid, mix well, mix well, granules of loose, material is placed in a boat, calcined with a calcined furnace, calcination temperature 600 ° C, Calcined for 1 h, then naturally cool down. After the calcination, the material was taken out, 2500 ml of pure water was added to normal temperature leaching, the leaching process was added to 10% sodium hydroxide solution to adjust the pH of the hydroxide 10, the leaching time was 100 min, and the leaching was filtered, the filtrate slag sampling detection, the filtrate was precipitated and ion exchange Methods The lithium carbonate products were added to the addition of sodium carbonate after addition. After the filter residue is pulled by solid fluid ratio 1: 3, heated to 60 ° C, adding a sulfuric acid solution to adjust pH0.9, after 15 min, and stream of sulfuric acid and hydrogen oxy...
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[0039] Example 3
[0040] Weigh 1000g used nickel-watery-rich three-dimensional ion battery positive material, add 920 ml of 30% concentrated sulfuric acid, mix well, mix well, granules, material is placed, and the material is placed in a boat, calcined, calcined temperature 500 ° C, Calcination for 4 h then naturally cools. After the calcination, the material was taken out, and 4000 ml of pure water was added to normal temperature leaching. The leaching process was added to the lithium hydroxide solution to adjust the pH of 10.5, the leaching time 2 h, the leaching was completed, and the filtrate slag sampling detection, the filtrate was precipitated and ion exchange Methods The lithium carbonate products were added to the addition of sodium carbonate after addition. After the filter residue was pulpized from 1: 4, heated to 60 ° C, the sulfuric acid solution was added to adjust pH0.9, and after 20 min, the process was added to the sulfuric acid and hydrogenly oxygen, and the pro...
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