Question

High alumina content in the blast furnace slag ____ .

• A. Increases its melting point, but decreases its viscosity
• B. Does not affect its melting point but increases its viscosity
• C. Decreases both its melting point but increases its viscosity
• D. Increases both its melting point and viscosity

Hint:

The viscosity of slag affects the ease of its removal and the overall efficiency of the blast furnace operation.

Answer 1

The Correct Option is D

High alumina content in blast furnace slag increases both the melting point and viscosity, which helps in trapping impurities but can make the slag more difficult to handle.