Abstract
The Hitachi Smelter & Refinery changed its name to the Hitachi Refinery and started operation with establishing the Nippon Mining & Metals in November in 1992.After the shut down of the Smelting Division in 1976, the Hitachi Refinery, mainly operating copper tank house and anode slime treatment section, established the development and production systems for new materials and valuable materials with joining various divisions of groups of our company.In the anode slime treatment section in the Saganoseki Smelter & Refinery was combined with the Hitachi Refinery in 1981.In result, the inventory of silver & gold and labor costs were reduced.At the tank house in 1989, a pitch changeable hunger was developed and the pitch of anode to anode was reduced from 110 mm to 100mm, resulting in increasing in the monthly capacity of cathode from 10, 000t/M to 11, 000t/M and reducing the electrical power consumption.In September in 1988, the Sb-removing process (NCR-process) using chelating resin was installed.This process highly contributes the stability of tank house operation.The reverberatory furnace, installed in 1978, for treating industrial waste is operating in good condition; furthermore a waste oil treatment plant was installed in April, 1993.Recycling Division is now planning to expand and is contributing to the maintenance of the ecological balance and environmental cleanliness of the earth.
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