METHOD FOR MELTING HEAVY METAL-CONTAINING SUBSTANCE

    公开(公告)号:JP2001149891A

    公开(公告)日:2001-06-05

    申请号:JP2000294587

    申请日:2000-09-27

    Applicant: ABB SCHWEIZ AG

    Abstract: PROBLEM TO BE SOLVED: To provide a method for melting a heavy metal-containing substance 4 by charging the heavy metal-containing substance 4 in a converter or rotary kiln useful as a melting furnace to melt the same by a burner 2 operated by gas containing oxygen in a ratio higher than air or oxygen 6 and fossil fuel 5 not only to form slag 10 but also to generate flue gas 7. SOLUTION: A burner 2 and/or liquid slag 10 is operated more intensively and reductively as Zn is converted to a gaseous phase and the generated gas is allowed to flow out of molten matter and mixed with flue gas to be discharged. When a heavy metal-containing substance 4 additionally contains Cu, the slag is always additionally operated by a liquid Fe regulus 13 in order to reduce Cu in the slag. The content of heavy metals in the slag 10 falls below a limit value required in the slag 10 for disposal treatment.

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