Question

Which of the following is correct regarding the reduction of hematite ore in a blast furnace?

• A. Silica is as flux to remove impurities as silicates
• B. CO acts as the main reducing agent in high temperature zone
• C. C acts as the main reducing agent in the low temperature zone
• D. Most of the heat required for the process provided by the burning of coke

Answer 1

Answer: (A), (C), (D)

The correct options are
A Silica is as flux to remove impurities as silicates
C C acts as the main reducing agent in the low temperature zone
D Most of the heat required for the process provided by the burning of coke

In the reduction of hematite ore in a blast furnace, $C$ acts as a main reducing agent in the high-temperature zone while $CO$ in a low-temperature zone. $CaC{O}_3$ is used as flux to remove $Si{O}_2$ from the ore. Also, the burning of coke is a highly exothermic reaction, whose energy is utilized for the process.