Method for recovering valuable metal from battery electrode material leaching liquid
A technology of valuable metals and battery electrodes, which is applied in the field of recycling valuable metals, can solve problems such as safety pollution and impact on the sustainable development of new energy vehicles, and achieve the effects of saving costs, avoiding cost consumption, and reducing production costs
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Embodiment 1
[0016] A leach solution of a waste lithium-ion battery electrode material, which contains nickel 5g / L, cobalt 20g / L, aluminum 1.9g / L, manganese 0.10g / L, lithium 10g / L, copper 2g / L, iron 0.1g / L and phosphorus 0.2g / L. Use sodium hydroxide to adjust the pH value of the leaching solution to 0.2, and extract copper with Lix984 extractant at a volume ratio of 1:1 to obtain a raffinate containing iron, aluminum, manganese, nickel, cobalt and lithium, and recover copper from the organic phase containing copper ; Press the molar ratio 1:0.7 of phosphate root and iron and aluminum ion, add the sodium phosphate solution of concentration 0.01mol / L in the raffinate to precipitate iron and aluminum, stir for 3 hours, filter, obtain precipitate and precipitation mother liquor; The volume ratio is 1:1, and the precipitated mother liquor is extracted and separated with P204 extractant to obtain lithium-containing raffinate and manganese-nickel-cobalt organic phase; adding a sulfuric acid solut...
Embodiment 2
[0018] A leach solution of a waste lithium-ion battery electrode material, which contains nickel 5g / L, cobalt 20g / L, aluminum 1.9g / L, manganese 0.10g / L, lithium 10g / L, copper 2g / L, iron 0.1g / L and phosphorus 0.2g / L; use sodium hydroxide to adjust the pH value of the leach solution to 0.9, and extract copper with M5640 extractant at a volume ratio of 5:1 to obtain a raffinate containing iron, aluminum, manganese, nickel, cobalt and lithium, containing copper The organic phase reclaims copper; According to the molar ratio of phosphate root and iron and aluminum ion 1:1, the sodium phosphate solution of concentration 1mol / L is added in the raffinate and precipitates iron and aluminum, stirs 0.5 hour, filters, and obtains precipitate and Precipitation mother liquor; according to the volume ratio of 5:1, extract and separate the precipitation mother liquor with Cyanex272 extractant to obtain lithium-containing raffinate and manganese-nickel-cobalt organic phase; add a concentration ...
Embodiment 3
[0020] A leach solution of a waste lithium-ion battery electrode material contains nickel 38g / L, cobalt 8g / L, aluminum 0.9g / L, manganese 17.0g / L, lithium 3g / L, copper 0.2g / L, iron 2.7g / L and Phosphorus 2.8g / L; Regulate pH value of leaching solution with sodium carbonate to be 2.2, filter to get sediment and filtrate; Regulate pH value of leaching solution with sodium hydroxide to be 0.5, by volume ratio 3:1, extract copper with Lix973 extraction agent, obtain The raffinate containing iron, aluminum, manganese, nickel, cobalt and lithium, and the organic phase containing copper recover copper; according to the molar ratio of phosphate to iron and aluminum ions 1:0.8, the sodium phosphate solution with a concentration of 0.09mol / L Add the raffinate to precipitate iron and aluminum, stir for 2.5 hours, and filter to obtain the precipitate and the precipitated mother liquor; the precipitated mother liquor is extracted and separated with a mixed extractant of P204 and P507 at a volu...
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