Treatment method of nickel-cobalt-manganese wastewater produced in the process of waste battery treatment

Abstract

The invention discloses a method for treating nickel-cobalt-manganese wastewater produced in the process of treating waste batteries. The wastewater mainly contains metal ions such as nickel, cobalt, manganese and copper and a small amount of water-insoluble organic matter. The main feature of the present invention is that the waste water is subjected to step-by-step coagulation-sedimentation treatment, followed by sand filtration-carbon filtration-ion exchange deep purification treatment, and the effluent quality can reach the first-level standard in the national sewage comprehensive discharge standard, and also meets the industrial production water If required, it can be returned to production for recycling. The invention is beneficial to the reuse of nickel-cobalt-manganese wastewater, and has the characteristics of low cost, high metal recovery rate, large processing capacity, reasonable process flow, simple operation, stable operation, and easy industrial implementation. An effective way of cobalt manganese wastewater.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and relates to a method for treating nickel-cobalt-manganese wastewater generated during the treatment of waste batteries. Background technique [0002] In recent years, with the rapid increase in the consumption of lithium-ion batteries and nickel-hydrogen batteries, the number of scrapped lithium-ion batteries and nickel-hydrogen batteries has increased significantly year by year. These waste batteries contain a lot of valuable metals, such as nickel, cobalt, copper, aluminum, iron, lithium, etc., so recycling waste batteries can not only generate huge economic benefits, but also reduce harmful substances in batteries, such as lithium hexafluorophosphate, which are harmful to the environment It can alleviate the shortage of metal cobalt, a strategic resource in my country, and the tension of long-term dependence on imports, promote the sustainable development of my country's battery industry, and ...

AI Technical Summary

Problems solved by technology

Although ultrafiltration and reverse osmosis have good treatment effects, the treatment speed is relatively slow (the amount of wastewater treated by each osmotic membrane per hour does not exceed 0.45m 3 ), the membrane cost is high, the membrane pores are easy to block and cause failure, the life is short, and it cannot be regenerated and can only be replaced. Generally, only large-scale enterprises have such economic strength, and small and medium-sized enterprises cannot bear it, so they can only be directly treated after pretreatment Discharge or only discharge after primary filtration, which will introduce secondary pollution to the environment, and cause the quality of wastewater to fail to meet the industrial production water standard and make it difficult to return to use, which greatly wastes water resources

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