A. high temperature, high viscosity, low FeO content of slag
B. low temperature, high viscosity, high FeO content of slag
C. low temperature, low viscosity, and low FeO content of slag
D. high temperature, low viscosity, and high FeO content of slag
Answer: Option C
This Question Belongs to Metallurgical Engineering >> Steel Making In Metallurgy
Identify the incorrect statement with reference to L.D. steel making
A. The temperature of L.D. furnace is maintained at around 1600°C
B. The basicity of slag is maintained at around unity
C. Dephosphorisation and decarburisation should proceed simultaneously
D. High silicon hot metal may lead to sloping
The oxidising power of a steel making slag is dependent on the concentration of
A. CaO, because Ca2+ ions are oxidising to the elements
B. CaO, because O2- ions are oxidising to the elements
C. FeO, because Fe2+ ions are oxidising to the elements
D. FeO, because O2- ions are oxidising to the elements
A. a is false but r is true
B. a is true but r is false
C. a is true and r is also true, but r is not the reason for a
D. a is true and r is also true, and r is the reason for a
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