銑鉄を利用した鉄基合金中間産物の脱ヒ素・脱アンチモン処理の基礎

抄録

The use of pig iron and the resulting formation of liquid iron base alloys from the solid ones at medium temperatures in nonferrous metallurgy will be of great interest for developing new processes to treat solid iron base alloys containing arsenic or antimony such as furnace residues and secondary Fe-Cu alloys produced in reducing smelting and recycling. In this report, some fundamental data on the phase relations and distribution of minor elements between the liquid iron base alloy (pig iron) and coexisting liquid phases in the Fe-Pb-C-M (M = As, Sb), Fe-Cu-C-M and Fe-Cu-S-C-M systems saturated with carbon at 1200°C are summarized. Based on these data, materials-balance calculations were made on some processes using pig iron, which have been proposed by the authors, focusing on the elimination or fixation of arsenic and antimony and the recovery of valuable elements when the Fe-Pb composite byproduct produced in lead smelting, the Fe-Cu furnace residue recovered in copper smelting and recycling, and the copper matte recovered in slag cleaning are treated.