Life Cycle Assessment of Environmental Impact of Steelmaking Process

Table 1

Life cycle inventories of molten steel. Value are presented per ton.

Inputs and outputs	Categories	Normal production	Clean production	Unit
Molten iron		1008	947	kg
Scrap steel		70.43	78	kg
Electricity		26.65	25s	kWh
Ingredients	Quicklime	50	50	kg
	Fe	20	20	kg
	Dolomite	20	20	kg
Fuel	Coke oven gas	0.16	0.16	m^3
	BOF gas	12.15	12.15	m^3
Working medium	Oxygen	37.28	37.28	m^3
	Nitrogen	45.12	45.12	m^3
	Argon	75.2	75.2	m^3
	Air	15.38	15.38	m^3
	Pure water	2.7	2.7	m^3
Emission	CO2	28.28	28.28	kg
	SO2	5.75	5.75	g
	NO2	3.84	3.84	g
	CO	4.6	4.6	kg
	Waste water	1.07	1.07	m^3
	Dust	135	135	kg
	Cd	50	50	mg
	Cr	120	120	mg
	Cu	3090	3090	mg
	Ni	280	280	mg
	Pb	930	930	mg
	Zn	7500	7500	mg