FIELD: waste recycling.
SUBSTANCE: invention relates to a method for recycling used lithium-ion batteries. More specifically, the invention relates to a method for removing impurities from a leach solution of used lithium-ion batteries. A method for treating a leaching solution obtained from black mass includes adjusting the pH of the leaching solution to a value from 1.2 to 2.15, adding powdered iron to precipitate copper, lime addition carried out after copper precipitation, changing the pH of the leaching solution up to 6 after lime addition to separate calcium fluoride, titanium hydroxide, aluminium hydroxide, iron hydroxide, and iron phosphate. A black mass processing system, including an impurity removal reactor designed to receive the original sodium hydroxide, the original powdered iron and the original lime.
EFFECT: efficient removal of impurities using less equipment and a smaller reduction in the amount of valuable metals available for extraction.
12 cl, 3 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REMOVING IMPURITIES WHEN PROCESSING LITHIUM-ION BATTERIES | 2021 |
|
RU2826255C2 |
| METHOD OF RECYCLING SPENT CHEMICAL CELLS | 2011 |
|
RU2486262C2 |
| METHOD FOR EXTRACTION OF LITHIUM AND TRANSITION METAL, USING HEATING | 2019 |
|
RU2790318C2 |
| METHOD OF PREPARING COBALT /II/ SULFATE | 1998 |
|
RU2141452C1 |
| METHOD OF PRODUCTION OF COBALTOUS SULFATE | 1998 |
|
RU2138446C1 |
| PROCESSING METHOD OF COBALT-CONTAINING WASTES | 2012 |
|
RU2489509C1 |
| METALS EXTRACTION FROM SULFIDE MATERIALS | 2003 |
|
RU2353679C2 |
| METHOD FOR PROCESSING COMPLEX ORE CONTAINING NIOBIUM AND RARE EARTH ELEMENTS AS MAIN COMPONENTS | 2020 |
|
RU2765647C2 |
| METHOD OF MANUFACTURING ACTIVE MASS COMPONENTS OF NEGATIVE ELECTRODES FOR ALKALINE ACCUMULATORS DURING THEIR REGENERATIVE RECYCLING | 2007 |
|
RU2344520C2 |
| EXTRACTION METHOD OF LITHIUM FROM SPODUMENE-CONTAINING BERYLLIUM CONCENTRATE | 2008 |
|
RU2371492C2 |
