石灰石吸咐了铁矿石中的杂质，形成浮在较重的铁水表面上的流动渣。 The limestone absorb impurity from the ore and form a fluid slag which floats on the surface of the heavier molten iron.
不，他们不能，因为他们还没有学会如何把铁矿石加热到足以使它熔化。 No, they can not, because they have not learnt how to heat the iron is enough to melt it.
先把铁矿石和焦碳、石灰石混合在一起。 First, ore is mixed with coke and limestone.
