Carbon refractory blocks ___________________?
Correct answer: B. Are used in the hearth of blast furnace
- A. Are wetted by molten iron
- B. Are used in the hearth of blast furnace
- C. Are acidic in nature
- D. All A., B. and C.
Explanation
Carbon blocks are not readily wetted by molten iron and are therefore suitable for the hearth of a blast furnace. Carbon is generally classified as a neutral refractory rather than an acidic one, so option C is false.
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