The application of cold agglomeration process has been introduced for cheeper treatment of fine oresand dust recovery.
The cold pellets contained carbon material for Si-Mn alloy was produced by newly developed NKK-CORAC (Continuous Rapid Curing) pilot plant.
The physical properties of the pellets such as decrepitation, reduction disintegration, reducibility for direct reduction and resistivity at elevated temperatures were improved.
The test operation for Si-Mn alloy production in 1250 KVA electric furnace using the pellets achieved remarkable decrease of electricity consumption, and nut coke consumption by coke fines in the pellets, and increase of manganese yield in metal.
Based on the test results, a commercial plant of NKK-CORAC process producing 100 t/day of the cold pellets for Si-Mn alloy production was started up at Niigata Works in November 1983.
Si-Mn alloy has been efficiently produced in a 25 000 KVA furnace with these cold pellets.
