Process for the recovery of lithium
US-2022017990-A1 · Jan 20, 2022 · US
Recovery of nickel and cobalt from Li-ion batteries or their waste
US12416065B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12416065-B2 |
| Application number | US-202318302038-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 18, 2023 |
| Priority date | May 26, 2021 |
| Publication date | Sep 16, 2025 |
| Grant date | Sep 16, 2025 |
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Abstract
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The present invention lies in the field of pyrometallurgy and discloses a process and a slag suitable for the recovery of Ni and Co from Li-ion batteries or their waste. The slag composition is defined according to: 10%<MnO<40%; (CaO+1.5*Li 2 O)/Al 2 O 3 >0.3; CaO+0.8*MnO+0.8*Li 2 O<60%; (CaO+2*Li 2 O+0.4*MnO)/SiO 2 ≥2.0; Li 2 O≥1%; and, Al 2 O 3 +SiO 2 +CaO+Li 2 O+MnO+FeO+MgO>85%. This composition is particularly adapted to limit or avoid the corrosion of furnaces lined with magnesia-bearing refractory bricks.
First claim
Opening claim text (preview).
The invention claimed is: 1. Li-containing metallurgical slag having a percent composition by weight according to: 10%<MnO<40%; (CaO+1.5*Li 2 O)/Al 2 O 3 >0.3; CaO+0.8*MnO+0.8*Li 2 O<60%; (CaO+2*Li 2 O+0.4*MnO)/SiO 2 ≥2.0; Li 2 O≥1%; and, Al 2 O 3 +SiO 2 +CaO+Li 2 O+MnO+FeO+MgO>85%. 2. Li-containing metallurgical slag according to claim 1 , wherein said slag has a green color. 3. Li-containing metallurgical slag according to claim 1 , wherein the content of MnO in the slag is greater than 10% and less than or equal to 30%. 4. Li-containing metallurgical slag according to claim 1 , wherein the content of CaO in the slag is greater than or equal to 15% and less than or equal to 50%. 5. Li-containing metallurgical slag according to claim 1 , wherein the content of Al 2 O 3 in the slag is less than or equal to 50%. 6. Li-containing metallurgical slag according to claim 1 , wherein the content of Fe in the slag is less than or equal to 25%. 7. A slag former in a pyrometallurgical recycling process comprising the Li-containing metallurgical slag according to claim 1 .
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Classifications
Refining · CPC title
by reduction in solid state, e.g. by segregation processes · CPC title
- C22B7/04Primary
Working-up slag · CPC title
separating two or more metals by melting out (liquation), i.e. heating above the temperature of the lower melting metal component(s); by fractional crystallisation (controlled freezing) · CPC title
Reclaiming serviceable parts of waste accumulators · CPC title
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- What does patent US12416065B2 cover?
- The present invention lies in the field of pyrometallurgy and discloses a process and a slag suitable for the recovery of Ni and Co from Li-ion batteries or their waste. The slag composition is defined according to: 10%<MnO<40%; (CaO+1.5*Li 2 O)/Al 2 O 3 >0.3; CaO+0.8*MnO+0.8*Li 2 O<60%; (CaO+2*Li 2 O+0.4*MnO)/SiO 2 ≥2.0; Li 2 O≥1%; and, Al 2 O 3 +SiO 2 +CaO+Li 2 O+MnO+FeO+MgO…
- Who is the assignee on this patent?
- Umicore Nv
- What technology area does this patent fall under?
- Primary CPC classification C22B7/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 16 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).