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:In the extraction of iron; hot air is introduced…The main function of limestone in the blast furnace is to?The raw materials used for the smelting of iron ore…The earthly impurities in iron ore are removed in…The main function of limestone in the blast furnace is to?