Leaching method for anode material of waste LiNiO2 battery
A lithium nickel oxide waste battery and positive electrode material technology, which is applied in the direction of improving process efficiency, can solve the problems of environmental pollution, large consumption of nitric acid, large nitrogen oxides, etc., and achieve reduced consumption of nitric acid, obvious economic benefits and environmental protection Benefits, the effect of saving pollution control costs
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Embodiment 1
[0022] Embodiment 1: 100g lithium nickelate waste battery positive electrode material (containing nickel 54.3%, lithium 5.5%, copper 7.8%, aluminum 3.1%) is added in the stainless steel autoclave that volume is 2L, adds the nitric acid 1700ml of 3.0mol / L, Introduce 0.2MPa industrial pure oxygen, stir at 40-50°C (stirring speed 80r / min) for leaching for 2.0 hours, carry out liquid-solid separation after leaching, and obtain 1650ml leaching solution (excluding leaching slag washing water). The reaction tail gas is about 900ml (converted into a volume with an absolute pressure of 0.1MPa), and the concentration of nitrogen oxides is 7.5mg / m 3 . The leaching rates of nickel, lithium and copper are 98.5%, 98.7% and 96.9% (calculated according to the nickel, lithium and copper entering the leaching solution and leaching slag washing solution).
Embodiment 2
[0023] Embodiment 2: 400g nickel metal hydride waste battery cathode material (containing nickel 54.3%, lithium 5.5%, copper 7.8%, aluminum 3.1%) is added in the stainless steel autoclave that volume is 10L, adds the nitric acid 8.3L of 2.5mol / L, Introduce industrial pure oxygen of 0.1MPa, stir at 50-60°C (stirring speed 80r / min) for 3 hours, carry out liquid-solid separation after leaching, obtain 8.1L leaching solution (excluding leaching slag washing water), and react The exhaust gas is about 3.4L (converted into a volume with an absolute pressure of 0.1MPa), and the concentration of nitrogen oxides is 6.3mg / m 3 . The leaching rates of nickel, lithium and copper are 98.4%, 98.9% and 97.6% (calculated according to nickel, lithium and copper entering the leaching solution and leaching slag washing solution).
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