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Method for recycling manganese from positive electrode material of waste zinc-manganese dry battery and application

A zinc-manganese dry battery and positive electrode material technology, which is applied in the field of oxidation leaching manganese, can solve the problems of pollution, waste of resources and the environment, and achieve the effect of no pollution to the environment, good effect and high efficiency

Active Publication Date: 2021-01-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of waste of resources and environmental pollution caused by improper disposal of waste zinc-manganese dry batteries, and propose a method for recycling manganese from waste zinc-manganese dry batteries with high efficiency, greenness and environmental protection

Method used

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  • Method for recycling manganese from positive electrode material of waste zinc-manganese dry battery and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh a certain mass of battery cathode material powder and add it to 100mL phosphoric acid solution with a concentration of 2mol / L, and add 2vol.% hydrogen peroxide, and mix it into the lining of the reaction kettle. Seal and close the bolts of the reactor to ensure that there is no leakage, and continuously inject nitrogen gas for 5 minutes to remove the residual air in the reactor and prevent the possible interference of oxygen to the experiment. Start the heating device, the reactor will be heated to the set temperature, and keep it for a certain period of time (150°C, 100min). After finishing the reaction, the reactor will cool down naturally. After cooling to room temperature, the reaction kettle was opened, and the reacted mixed solution was suction-filtered to obtain manganese-containing leaching solution, and the measured manganese recovery rate was 96.4%.

Embodiment 2

[0039] Weigh a certain mass of battery cathode material powder and add it to 100mL phosphoric acid solution with a concentration of 2.5mol / L, and add 2.5vol.% hydrogen peroxide, mix and put it into the lining of the reactor. Seal and close the bolts of the reactor to ensure that there is no leakage, and continuously inject nitrogen gas for 5 minutes to remove the residual air in the reactor and prevent the possible interference of oxygen to the experiment. Start the heating device, the reactor will be heated to the set temperature, and keep it for a certain period of time (175°C, 110min). After finishing the reaction, the reactor will cool down naturally. After cooling to room temperature, the reaction kettle was opened, and the reacted mixed solution was suction-filtered to obtain manganese-containing leaching solution, and the measured manganese recovery rate was 97.6%.

Embodiment 3

[0041]Weigh a certain mass of battery cathode material powder and add it to 100mL phosphoric acid solution with a concentration of 3mol / L, and add 3vol.% hydrogen peroxide, and mix it into the lining of the reactor. Seal and close the bolts of the reactor to ensure that there is no leakage, and continuously inject nitrogen gas for 5 minutes to remove the residual air in the reactor and prevent the possible interference of oxygen to the experiment. Start the heating device, the reactor will be heated to the set temperature, and keep it for a certain period of time (200°C, 120min). After finishing the reaction, the reactor will cool down naturally. After cooling to room temperature, the reaction kettle was opened, and the reacted mixed solution was suction-filtered to obtain manganese-containing leaching solution, and the measured manganese recovery rate was 98.9%.

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Abstract

The invention discloses a method for recycling manganese from a positive electrode material of a waste zinc-manganese dry battery. The method comprises the following steps of: performing discharge treatment on the waste zinc-manganese dry battery by using a sodium sulfate solution, and performing manual disassembly and separation after a safe voltage is reached to obtain a manganese-containing positive electrode active material; and then carrying out pressurized resource leaching on the positive electrode active material by adopting an acid and oxidant system. According to the method, manganese in the waste battery can be effectively recycled, and meanwhile, the battery negative electrode material zinc skin can be obtained. According to the method, the manganese battery material is subjected to acid leaching by adopting an acid and oxidant system, so that a good recycling effect is achieved, recycling of manganese and zinc resources is realized, a new thought is provided for green andenvironment-friendly recycling of the battery, and the method has the characteristics of good recycling effect, low operation cost, no pollution to the environment and the like. The invention also discloses application of the method in resource recovery of manganese from the positive electrode material of the waste zinc-manganese dry battery.

Description

technical field [0001] The invention belongs to the technical field of resource leaching of manganese which is a positive electrode material of waste zinc-manganese dry batteries in electronic waste. Specifically relates to a method for oxidizing and leaching manganese from waste zinc-manganese dry battery positive electrode materials. Background technique [0002] Zinc-manganese batteries have many advantages such as low cost, abundant raw materials, easy to carry, and convenient processing. They are widely used in lighting, communication, medical and other related fields, and can be seen everywhere in daily life. 1 . As the largest developing country in the world, my country's battery production and use pattern is dominated by disposable zinc-manganese batteries, accounting for more than 90% of my country's total battery consumption 2 . Zinc-manganese batteries are disposable batteries. The positive electrode is mainly composed of carbon rods, acetylene black, graphite,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/52H01M6/06
CPCH01M6/52H01M6/06C22B7/007C22B47/00Y02W30/84
Inventor 詹路许振明任晓川
Owner SHANGHAI JIAO TONG UNIV
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