Treatment method of nickel-cobalt-manganese wastewater generated in waste and old battery treatment process

Abstract

The invention discloses a treatment method of nickel-cobalt-manganese wastewater generated in waste and old battery treatment process and the wastewater mainly contains metal ions such as ions of nickel, cobalt, manganese, copper and the like and little organic matter which is insoluble in water. The invention is mainly characterized in that first the wastewater is treated by stepwise coagulation-sedimentation treatment, then sand filtration-carbon filtration-ion-exchange deep purification treatment is performed, the effluent quality reaches the first-class standard of National Discharge Standards and also corresponds to the demand of industrial production water and the effluent can be reused in production for recycling. The invention facilitates the reuse of nickel-cobalt-manganese wastewater, is characterized by low cost, high metal recovery, large treating capacity, reasonable process flow, simple operation, stable operation, easy execution in industry and the like and is an effective way for the treatment of nickel-cobalt-manganese wastewater generated in waste and old battery recovery process.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and relates to a treatment method for 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-metal hydride batteries, the number of scrapped lithium-ion batteries and nickel-metal hydride batteries has increased significantly year by year. These waste batteries contain a large amount of valuable metals, such as nickel, cobalt, copper, aluminum, iron, lithium, etc. Therefore, 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. pollution, alleviate the shortage of my country's strategic resource metal cobalt, and the long-term tense situation of import resistance, and promote the sustainable development of...

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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