Which of the following is needed to produce slag during the extraction of iron in the blast furnace? by Sunday | Aug 21 | Chemistry WAEC | 0 comments A. Cryolite B. Limestone C. Carbon D. Sulphur Correct Answer: Option B – Limestone Users Also Read These:The main function of limestone in the blast furnace is to?In the extraction of iron; hot air is introduced…In the extraction of iron, the waste gas from the…The earthly impurities in iron ore are removed in…The function of limestone in the extraction of iron…