TREATMENT OF WASTE DRY BATTERY

摘要

PURPOSE:To utilize effectively energy and to treat and recover valuable metals by consisting a shaft furnace of an oxidizing furnace, reducing furnace and melting furnace and utilizing the gas from the melting furnace in the reducing gas then in the oxidizing furnace. CONSTITUTION:The bottom of the vertical shaft furnace 4 is constituted of the melting furnace 7, the upper part of the oxidizing atmosphere furnace 5 and the lower part of the reducing atmosphere furnace 6 in the treatment of waste dry batteries. Mercury is treated in the furnace 5 and zinc in the furnace 6. A manganese-iron alloy is subjected to melt reduction in the furnace 7. The reducing gas and sensible heat generated in the furnace 7 is utilized for the reduction reaction in the furnace 6 and thereafter the gas is once discharged to the outside of the furnace and is then introduced into the furnace 5 after necessary treatment. The energy is thus effectively utilized and the valuable metals are treated and recovered at a low cost.