Give all the stages of the extraction of iron and what happens in each of those stages

Coke is burnt giving out heat Carbon reacts with oxygen to give Carbon Dioxide Carbon Monoxide is made The carbon dioxide reacts with more coke to give out carbon monoxide Iron(III) oxide is reduced Carbon monoxide reacts with iron ore giving liquid iron The limestone breaks down in the heat of the furnace Calcium oxide that forms reacts with impurities(Sand) which is mainly silicon dioxide(silica) to form Calcium silicate which forms slag Slag is used for road building Waste gases Carbon dioxide and Nitrogen