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 impurity in iron ore during the extraction…The earthly impurities in iron ore are removed in…The process of extraction of iron from its ore is?The main function of limestone in the blast furnace is to?In the extraction of iron, the waste gas from the…