In recent years, lithium-ion batteries have been widely used due to their advantages such as high voltage, long cycle life and good safety performance. As a result, the number of waste lithium-ion batteries has increased dramatically. The positive electrode materials of waste lithium batteries contain valuable metals such as nickel, cobalt and lithium, which have high recycling value. It is of great significance to harmlessly treat them and recover the valuable resources in them.
Extraction method Of extracting nickel cobalt and lithium
The solvent extraction-precipitation method is usually used to recover valuable metals from waste lithium batteries.
Operation process: raw material leaching--adjusting pH--injection into extraction equipment--mixing and separation--discharging from the body--washing--stripping--evaporation and crystallization.
Operation process of extracting nickel cobalt and lithium
The lithium battery positive electrode material powder is leached, the pH value of the leachate is adjusted, and then a suitable extractant is selected. The extractant and the leachate are injected into the centrifugal extractor through different inlets according to a certain ratio. Through the action of centrifugal force, the two phase liquid is quickly mixed and separated in the body, and the separated light and heavy phases are discharged from the body from different outlets to complete the separation process. The separated loaded organic phase is washed, stripped, evaporated, crystallized and other processes to obtain the finished product.
Experimental data show that the pH value of the aqueous phase, the concentration of the extractant, the extraction temperature, and the ratio will affect the extraction and separation effect. Therefore, the above factors need to be paid attention to during the operation.
Through experiments, the process of solvent extraction-precipitation to extract and recover valuable metals such as nickel, cobalt, and lithium from waste lithium-ion batteries has matured. The selection of appropriate extractants and the use of centrifugal extractors have high extraction rates and good extraction effects. For relevant technical parameters and processes of centrifugal extractors, welcome contact us. Our company will provide you with a full range of technical services.
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