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, the waste gas from the…The main function of limestone in the blast furnace is to?The raw materials used for the smelting of iron ore…What causes the following weld defects? (i) Undercut…The process of extraction of iron from its ore is?