What is BF slag and it’s composition? How is it different from LD slag?
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Blast furnace slag is formed during IRON MAKING produced whereas LD slag is formed during the separation of molten steel from impurities in STEEL MAKING. LD generally contains more FeO than BF slag. [caption id="attachment_2569" align="alignnone" width="1080"] Slag composition[/caption]
Blast furnace slag is formed during IRON MAKING produced whereas LD slag is formed during the separation of molten steel from impurities in STEEL MAKING.
LD generally contains more FeO than BF slag.
Slag composition
Slag is the chemical composition of gangue material and flux. According to ASTM specification, blast furnace slag may be defined as the non-metallic product, consisting of silicates and alumino- silicatesof lime and other bases, which is developed simultaneously with iron in blast furnace. The geneRead more
Slag is the chemical composition of gangue material and flux. According to ASTM specification, blast furnace slag may be defined as the non-metallic product, consisting of silicates and alumino- silicatesof lime and other bases, which is developed simultaneously with iron in blast furnace.
The general composition of BF slag is:
SiO2– 32%
CaO- 31%
Al2O3– 25%
MgO- 9%
FeO- 0.8%
MnO- 1.1%
S- 0.63%
LD slag is the combination of Feo-CaO-P2O5 with 15-40% FeO.
See lessFirst pic(blue) is LD slag analysis, second pic( red) is BF slag analysis. Here you can see the difference. BF slag is acidic in nature having basicity around 1 but LD slag is basic in nature having basicity around 3. Rest you can figure out from analysis provided.
First pic(blue) is LD slag analysis, second pic( red) is BF slag analysis. Here you can see the difference. BF slag is acidic in nature having basicity around 1 but LD slag is basic in nature having basicity around 3. Rest you can figure out from analysis provided.
See less