Shisaka Smelting Co.,Ltd.
Shisaka-jima is located approximately 20 km off the coast of Niihama, Ehime. As the name indicates "four islands", Shisaka-jima is the common name for Mino-shima, Yano-shima, Myojin-jima and Nezumi-jima islands. The Shisaka Smelting Co.,Ltd. is located on Yano-shima island. In the Shisaka Smelting Co.,Ltd., the recycling business of recovering zinc contained in steelmaking dust is performed using refining technologies, while placing first priority on the protection of the natural environment.
Main products at Shisaka Smelting Co., Ltd.
Zinc Oxide Pellet
Granulated zinc oxide which is raw material of metal zinc.
Iron Contained Pellet
Pellets containing abundant metal iron. Distributed as iron raw material, etc.
Smelting and refining at the Shisaka Smelting Co.,Ltd.
Raw Materials
Steelmaking dust generated during refining processes in electric furnaces is used as the main raw material.
Smelting and refining process
Production of zinc
STEP1
Unloading
Raw material steelmaking dust is transported by a specialized carrier, and unloaded on the ore quay
Copper smokestack
Zinc content
20%
STEP2
Reduction Roasting
The raw material loaded onto the ore quay is heated up to 1200 degrees C in a reduction rotary kiln together with coke and flux, etc., to reduce and volatilize zinc.
STEP3
Hydrometallurgical Process
The reduced and volatilized zinc is recovered as crude zinc oxide and hydrometal-lurgically processed in a coagulating tank, thickener, and belt filter to remove impurities from it.
STEP4
Heated-air drying, Briquetting
Hydrometal-lurgically processed crude zinc oxide is heated up in a drying rotary kiln and made into zinc oxide pellets
zinc oxide (ZnO)
Zinc content
Approx. 60%.
Smelting & Refining Business in Visual Media
Learn about the " Smelting & Refining Business" in pictures with description.
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Copper casting at the Toyo Smelter & Refinery
