<p>In order to separate and recover iron from nonferrous metals such as zinc contained in ironmaking dust in a short time, a mixture of ironmaking dust with a carbonaceous material in a ratio of 1:0.05 to 0.3 and a reducing gas containing hydrogen or carbon monoxide are fed into an external heating type rotary furnace, where the iron and the nonferrous metals are reduced with the reducing gas and zinc is vaporized and separated from the solid. The steam and carbon dioxide simultaneously produced at that time are reacted with the carbonaceous material to yield hydrogen and carbon monoxide, thus permitting a highly reducing atmosphere to be maintained in the furnace.</p>
申请公布号
WO9732048(A1)
申请公布日期
1997.09.04
申请号
WO1997JP00534
申请日期
1997.02.25
申请人
NIPPON STEEL CORPORATION;SANYO SPECIAL STEEL CO., LTD.;KOTANI, SEIICHI;MORIDERA, HIROMITSU;SHIGEZUMI, TADAYOSHI,