Combined treatment method of fluosilicic acid wastewater and waste lithium ion battery carbon residues
A lithium-ion battery and combined treatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of low purity of negative electrode materials, poor control of the ratio, and lithium-ion battery production. Difficulties and other problems, to achieve the effect of creating industrial value, reducing processing costs, and realizing utilization
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Embodiment 1
[0040] Weigh 20 g of the crushed and screened waste lithium-ion battery carbon slag and put it into a planetary ball mill for activation for 7 hours with a ball-to-material ratio of 12:1 and a rotational speed of 300 r / min.
[0041]The activated material is placed in a hydrothermal kettle with fluosilicic acid wastewater (H 2 SiF 6 39.83 wt %, HF 2.16 wt %, HCl 0.22 wt %, H 2 O is 57.7wt%, etc.) for the reaction, wherein the liquid-solid mass ratio is 8:1, and the temperature is 200°C for 10h. The filtrate obtained after liquid-solid separation (H 2 SiF 6 41.20%wt, HF 1.56%wt, HCl 0.21%wt, H 2 O is 56.8%wt, etc.) to make white carbon black, and the material powder obtained by solid-liquid separation is washed with water and dried.
[0042] Specifically, the filtrate can be placed in a stirring reactor, pre-heated in a constant temperature water bath to 95°C, then add aluminum hydroxide according to 0.9 times the theoretical amount, stir and react for 45 minutes at a deter...
Embodiment 2
[0046] Weigh 100 g of the crushed and screened waste lithium-ion battery carbon slag and put it into a planetary ball mill for activation for 3 hours with a ball-to-material ratio of 20:1 and a rotational speed of 200 r / min.
[0047] The activated material is placed in a hydrothermal kettle with fluosilicic acid wastewater (H 2 SiF 6 32.17wt%, HF 1.75wt%, HCl 0.18wt%, H 2 O is 65.82wt%, etc.) for the reaction, wherein the liquid-solid ratio is 12:1, and the temperature is 180°C for 8 hours. The filtrate obtained after liquid-solid separation (H 2 SiF 6 33.17%wt, HF 1.36%wt, HCl 0.18%wt, H 2 O is 65.29%wt, etc.) to make white carbon black, and the material powder obtained by solid-liquid separation is washed with water and dried. Specifically, the filtrate can be placed in a stirring reactor, pre-heated in a constant temperature water bath to 85°C, then add aluminum hydroxide according to 1.1 times the theoretical amount, stir and react for 30 minutes at a determined react...
Embodiment 3
[0051] Weigh 70 g of the crushed and screened waste lithium-ion battery carbon slag and put it into a planetary ball mill for activation for 10 h with a ball-to-material ratio of 6:1 and a rotational speed of 400 r / min.
[0052] The activated material is placed in a hydrothermal kettle with fluosilicic acid wastewater (H 2 SiF 6 23.79%wt, HF 1.29%wt, HCl 0.13%wt, H 2 O is 74.75%wt, etc.) for the reaction, wherein the liquid-solid ratio is 16:1, and the temperature is 220°C for 12h. The filtrate obtained after liquid-solid separation (H 2 SiF 6 24.61%wt, HF 1.00%wt, HCl 0.13%wt, H 2 O is 74.37%wt, etc.) to make white carbon black, and the material powder obtained by solid-liquid separation is washed with water and dried. Specifically, the filtrate can be placed in a stirring reactor, pre-heated in a constant temperature water bath to 100°C, then add aluminum hydroxide according to 0.7 times the theoretical amount, stir and react for 50 minutes at a determined reaction temp...
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