In the Basic Oxygen Furnace, the term 'basic' refers to the chemical nature of the refractory lining.

In the Basic Oxygen Furnace, the term 'basic' refers to the chemical nature of the refractory lining.

• A. False
• B. It refers to the flux material
• C. True
• D. It refers to the furnace size

Answer: (C)

In this furnace, the word “basic” describes the lining’s chemistry, not its size or any flux material. The basic oxygen furnace uses a lining made of basic oxides (such as magnesia or dolomite-based bricks), which are alkaline. This kind of lining is chosen because the slag produced during steelmaking in this furnace is also basic, so a basic refractory resists attack by that slag and lasts longer. If an acidic or silica-based lining were used, it would be attacked by the basic slag and wear out quickly. So the term reflects the chemical nature of the refractory lining, making the statement true.

In this furnace, the word “basic” describes the lining’s chemistry, not its size or any flux material. The basic oxygen furnace uses a lining made of basic oxides (such as magnesia or dolomite-based bricks), which are alkaline. This kind of lining is chosen because the slag produced during steelmaking in this furnace is also basic, so a basic refractory resists attack by that slag and lasts longer. If an acidic or silica-based lining were used, it would be attacked by the basic slag and wear out quickly. So the term reflects the chemical nature of the refractory lining, making the statement true.