Fluxes are used to combine with the impurities in the ore and coke to form a low melting point slag, which floats at the surface and is separated from the hot metal. The commonly used fluxes are limestone and dolomite.

• 熔剂用来与矿石和焦炭中的杂质化合，生成一种低熔点的渣浮在铁水表面，从而与铁水分离。常用的熔剂有石灰石和白云石。