Manufacturing method of high purity manganese sulphate from manganese sulphate waste liquid

Abstract

Provided is a method of manufacturing high-purity, high-quality manganese sulfate which can be immediately used for manufacturing a lithium ion secondary battery from manganese sulfate waste liquid of a wasted battery. Since impurities are removed from the manganese sulfate waste liquid by using sulfides causing no secondary contamination in the manganese sulfate waste liquid and the manganese sulfate is manufactured by performing evaporation concentration through heating, the manufacturing method is very environment-friendly and economical. Since the manganese recovering process improving the manufacturing yield of the manganese sulfate and the waste water treatment process capable of recycling the source materials and discharging waste water are integrated, the manufacturing method is very efficient and environment-friendly. The manufacturing method is applied to the recycling industry, and thus, it is possible to obtain effects of preventing environmental pollution and facilitating recycling the resources.

Description

technical field [0001] The invention relates to a method for preparing high-purity manganese sulfate from manganese sulfate waste liquid produced in the process of recovering metal from waste batteries or waste battery compositions. Background technique [0002] With the sudden increase of portable devices, the demand for secondary batteries is rapidly increasing. A variable lithium-ion secondary battery (Litium-Ion Secondary Battery) with a high energy density design occupies most of the secondary battery market. Lithium-ion secondary batteries are consumable parts that can be charged and discharged about 500 times and have a lifespan of about 6 months to 2 years. Since the lithium-ion secondary battery whose service life has expired contains a large amount of valuable metals such as lithium (Lithium, Li) and cobalt (Cobalt, Co), it is a recyclable resource with extremely high economic value. When crushing waste lithium batteries for recycling, granular components mainly ...

AI Technical Summary

Problems solved by technology

However, the extraction method using phosphoric acid solvents is pointed out to have the following disadvantages: that is, there is environmental pollution caused by phosphoric acid solvents, and discarded substances in the extraction process include manganese, copper, aluminum, calcium (Calcium, Ca), sodium (Sodium, Na) and other manganese sulfate waste liquid (Manganese SulfateWaste Liquid) brought environmental pollution, and to these huge treatment costs

Images