Korea Zinc, Onsan

Company Name Korea Zinc Co., Ltd. Onsan Cominco Ltd. Trail Operations... 

With the commissioning of the third Ausmelt technology smelter at Korea Zinc in Onsan, Ausmelt technology lead smelters will process high, medium and low grade feeds for a wide range of sulphide material blends. 

The main driving force for this development is the overall process improvement to be gained by removing many internal secondary recycle streams, thereby freeing the QSL smelter for primary lead smelting activities. This smelter is the third Ausmelt technology smelter installed at Korea Zinc s Onsan complex and will commence operations in the second half of... 

In the course of increasing the production ctq>acity of zinc at the Onsan Refinery from 50,000 tons per year in 1978, the first year of operation, to 350,000 tons per year in 1999, the treatment of iron-containing residue, which is currently a goethite residue, has been an important issue because of the limited space at the plant. Korea Zinc investigated the available technologies for a process that could produce an inert material and meet the limits of the pollution restrictions. The requirements for the new process installed at Korea Zinc were as follows ... 

Lower temperature and atmospheric pressure direct leaching of zinc sulphide concentrates has also been investigated in considerable detail (6), and there are two commercial facilities in operation, integrated with roast-leach-electrowin operations. The first is located at the Korea Zinc refinery in Onsan, Korea, and the second, at Outokumpu s zinc refinery in Kokkola, Finland (7). Similar to the pressure leach plant installations described above, both of these facilities were installed to expand zinc production. Table II summarizes the commercial zinc atmospheric pressure leach facilities. 

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