A resource treatment method for decommissioned battery carbon slag
A treatment method and resource recovery technology, which is applied in the field of resource recovery of decommissioned battery carbon slag, can solve problems such as difficulty in obtaining high-purity graphite, achieve high-efficiency recovery and recycling, low environmental pollution, and simple process effects
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Embodiment 1
[0041] Take 50g of decommissioned lithium-ion battery carbon residue from a domestic factory, of which the fixed carbon content is 86.18wt%, the volatile matter is 7.98wt%, and the ash content is 5.84wt%. Ash main element content (wt%): Si 12.84, Ni 27.50, O 18.61, Mn8.63, Co 6.13, Al 5.96, Na 4.48, Fe 4.23, P 3.87, Zr 3.29, Cu 2.13. Crush the carbon residue to -150um (-100 mesh), and NH 4 F is mechanically mixed according to the mass ratio of 1:0.5, and then the mixture is placed in a corundum crucible, kept in an argon atmosphere in a muffle furnace at 200°C for 4 hours, and after cooling, the slag is stirred and leached in a water bath. Leaching temperature: 60°C, leaching time 1h, liquid-solid ratio 15:1. The leaching residue was washed until neutral, filtered, and the filter residue was dried, tested according to the graphite chemical analysis method (GB / T-2008), and ultra-pure graphite powder with a purity of 99.990% was obtained.
[0042] After controlling the pH of t...
Embodiment 2
[0044] Take 50g of decommissioned lithium-ion battery carbon slag from a domestic factory, the fixed carbon content is 86.18wt%, the volatile matter is 7.98wt%, and the ash content is 5.84wt%. Ash main element content (wt%): Si 12.84, Ni 27.50, O 18.61, Mn 8.63, Co6.13, Al 5.96, Na 4.48, Fe 4.23, P 3.87, Zr 3.29, Cu 2.13. Crush the carbon residue to -150um (-100 mesh), and NH 4 F is mechanically mixed according to the mass ratio of 1:1, then put the mixed material in a corundum crucible, keep it in argon atmosphere in a muffle furnace at 250°C for 4 hours, after cooling, carry out water bath stirring and leaching of the obtained slag , Leaching temperature: 60°C, leaching time 1h, liquid-solid ratio 15:1. Wash the leached residue with water until neutral, filter, dry the filter residue, and test according to the graphite chemical analysis method (GB / T-2008) to obtain ultra-pure graphite powder with a purity of 99.992%. For the XRD pattern of the obtained graphite powder, see ...
Embodiment 3
[0047] Take 50g of decommissioned lithium-ion battery carbon slag from a domestic factory, the fixed carbon content is 86.18wt%, the volatile matter is 7.98wt%, and the ash content is 5.84wt%. Ash main element content (wt%): Si 12.84, Ni 27.50, O 18.61, Mn 8.63, Co6.13, Al 5.96, Na 4.48, Fe 4.23, P 3.87, Zr 3.29, Cu 2.13. Crush the carbon residue to -150um (-100 mesh), and NH 4 F is mechanically mixed according to the mass ratio of 1:0.7, and then the mixture is placed in a corundum crucible, and roasted in a muffle furnace at 200°C for 3 hours in an argon atmosphere. After cooling, the obtained slag is stirred and leached in a water bath. Temperature: 70°C, leaching time 2h, liquid-solid ratio 20:1. The leaching residue was washed until neutral, filtered, and the filter residue was dried, tested according to the graphite chemical analysis method (GB / T-2008), and ultra-pure graphite powder with a purity of 99.996% was obtained.
[0048] After controlling the pH of the leachi...
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