Three different materials are put in at the top. They are;1.Iron , the main one of which is called , which is mainly iron . To turn this into metal the must be removed. Taking away is called reduction.2. which is mainly the element .This acts as a fuel and also combines with gas to make monoxide. This monoxide reduces the iron ore by taking the away from the iron.3.Calcium carbonate in the form of . this decomposes to calium which reacts with impurities such as to form which is goes the furnace.Blown in through tubes lower down is hot . This provides the so that the can burn and form monoxide.Two things come out from the bottom of the furnace;1.Right at the bottom molten comes out. This is mainly turned into which is used in cars and .2.Floating on top is which is used in roadbuilding.can you plz fill in the gaps.this isnt homework by the way
