Leaching method of nickel cobalt lithium manganate waste battery positive-negative electrode mixed material
A technology of nickel-cobalt-lithium-manganese-manganate and mixed materials, which is applied in the field of leaching the positive and negative electrode mixed materials of nickel-cobalt-lithium-manganese-oxide waste batteries, can solve the problems of storage, transportation and use of industrial pure oxygen, and uneconomical use of industrial pure oxygen for self-use. The industrial pure oxygen amount is not large, etc., to achieve obvious economic and environmental benefits, reduce pollution treatment costs, and improve the effect of metal leaching rate
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Embodiment 1
[0025] Example 1: 100g nickel-cobalt lithium manganese oxide waste battery positive and negative mixed material (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, 12.9% manganese) and ≤1.5mm rice straw powder Add 29g into a titanium-lined pressure reactor with a volume of 2L, add 1650ml of a mixed acid solution with a concentration of sulfuric acid of 1.5mol / L and a concentration of nitric acid of 5g / L, and stir at 50°C to 60°C (stirring speed 80r / min) for leaching After 4 hours, liquid-solid separation was carried out after leaching, and 1600ml of leaching solution was obtained (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.1%, 98.8%, 99.0%, 99.1%, 98.7% and 99.2% respectively (according to the nickel, cobalt and lithium in the leaching solution and leaching slag washing solution , copper, aluminum and manganese calculations).
Embodiment 2
[0026] Example 2: 300g nickel-cobalt lithium manganate waste battery positive and negative mixed material (containing 14.5% nickel, 20.3% cobalt, 17.5% lithium, 2.2% aluminum, 2.5% copper, 12.9% manganese) and ≤1.5mm rice straw powder Add 105g into a titanium-lined pressure reactor with a volume of 5L, add 3000ml of a mixed acid solution with a sulfuric acid concentration of 3mol / L and a nitric acid concentration of 10g / L, and leaching at 70°C to 80°C (stirring speed 70r / min) for 2h , after the leaching is finished, liquid-solid separation is carried out to obtain 2800ml leaching solution (excluding leaching slag washing water). The leaching rates of nickel, cobalt, lithium, copper, aluminum and manganese are 99.4%, 99.3%, 99.6%, 99.2%, 98.7% and 99.3% respectively (according to the nickel, cobalt and lithium in the leaching solution and leaching slag washing solution , copper, aluminum and manganese calculations).
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