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Vertical shaft furnaces

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专利汇可以提供Vertical shaft furnaces专利检索,专利查询,专利分析的服务。并且A method of operating a copper shaft furnace (1) comprising charging the furnace with contaminated copper scrap to a level (7) at least one furnace diameter below the furnace upper rim (9), burning at least one stream of fuel with a substoichiometric quantity of air or oxygen-enriched air and thereby forming a hot gas mixture which is substantially non-oxidising to copper, passing the hot gas mixture upwardly through the scrap charge (5) in the furnace and thereby melting the copper and entraining contaminants in waste gas which pass upwardly from the scrap charge, and introducing a hot oxidising atmosphere into the shaft furnace at least one furnace diameter above the upper level of the scrap charge (5) to react with substantially all of the waste gas.,下面是Vertical shaft furnaces专利的具体信息内容。

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