Leaching method of nickel cobalt lithium manganate waste battery positive-negative electrode mixed material
A technology of nickel-cobalt lithium manganate and mixed materials is applied in the field of leaching of positive and negative electrode mixed materials of nickel-cobalt lithium manganate waste batteries, which can solve the problems of industrial pure oxygen storage, transportation and use, and industrial pure oxygen is uneconomical for self-use. The problems such as the small amount of industrial pure oxygen can achieve obvious economic and environmental benefits, reduce pollution control 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 thatch 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 99.0%, 98.7%, 99.0%, 99.2%, 98.9% and 99.1% 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 thatch 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 99.3%, 99.1%, 99.4%, 99.5%, 98.9% 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).
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