| 摘要 |
PURPOSE:To manufacture easily unfired lump ore having superior strength and water resistance without carrying out sintering by mixing fine iron ore with cement and water, compression-molding the mixture into flakes, and curing the flakes. CONSTITUTION:Fine iron ore is mixed with cement and water, and the mixture is compression-molded into flakes of about 6-15mm. thickness with a pair of press molding rolls. The flakes are crushed optionally to about 10-50mm. grain size, aged for <= about 24hr, and charged into a blast furnace. Any of hematite, magnetite and limonite type fine iron ores may be used as said fine iron ore, and the preferred grain size is <= about 5mm.. Portland cement, mixed cement or the like is added as said cement by 2-8wt%, and water is added by 4-8wt%.
|
