There are large and medium-sized blast furnace blast furnace blast furnace and small blast furnace of blast furnace, refractory material for great difference. 1000m3 the following small blast furnace is generally used with very low price of artificial ramming construction ramming material and very low strength of the mud. The 2000m3 and more than the general use of high-quality blast furnace castables and high cost of mud gun. The medium-sized blast furnace lies between the two, has a tendency to blast furnace refractories near.

The current and future development of blast furnace to large-scale, high pressure, high blast temperature, oxygen enrichment and coal injection, the direction of longevity! Stemming is not "mud", which is a functional refractory material, is related to the blast furnace, high yield and quality, reduce labor intensity, environmental protection, furnace before long the economic and technical index of the current stemming products a lot but the quality is uneven, the development of major functional significance of mud gun! The use of high quality mud can reduce the tapping times, extend the single tapping time, reduce the consumption of stemming, is conducive to the protection of blast furnace wall, reduce splash, is conducive to the smooth operation of blast furnace and longevity.