Roasting acid leaching electrolysis method, this method is generally to first crush the waste battery, and then put it into the roaster, control the temperature at about roasting, during the roasting process, the zinc skin melts and condenses, mercury chloride, ammonium chloride and chloride Zinc evaporates into the flue and absorbs it. The manganese oxide is reduced to carbon powder and organic matter. The roasted product is washed and leached with sulfuric acid. The leaching solution mainly contains zinc ions and manganese ions. The purified solution undergoes simultaneous electrolysis of zinc and manganese. Metal zinc is available at the cathode, and manganese dioxide is deposited at the anode. Compared with the second process, this process has been greatly improved and has a wider range of application. It can be used to process large quantities of waste batteries. The main disadvantages of this process are large investment, low recovery rate, high recovery cost, and poor economy. At the same time, it also faces some technical problems, such as the packaging of zinc-manganese batteries tends to be complicated and diversified, which makes the determination of recycling process parameters more difficult. ) Mechanized screening, breaking and sorting methods. Considering the unique advantages of the scheme), the recovery rate is high, the energy consumption required for recycling is low, and the secondary pollution is small. It can be improved on the basis of scheme (), changing manual operation to mechanized operation, and introducing the concept of industrialized production line to adapt it to large-scale battery recycling. But the technology is not perfect yet and needs further improvement. However, this method still has a certain potential for the application of alkaline zinc-manganese batteries, because alkaline zinc-manganese dry batteries have a very strong steel shell and are difficult to crush, so they can be dissolved with acid and then electrolytically recovered. The recovery rate is low, and materials like steel shells cannot be recycled.
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