refractory clay for block the tap hole

taphole caly is one kinds of refractory material used for block the taphole,it is devided into enhydrous Stemming and anhydrous
stemming .
1.Enhydrous taphole caly used for low pressure,low degree of intensive smelting for small and medium blast-furnace.
2.Anhydrous stemming used for high pressure,high degree of intensive smelting for medium and big blast-furnace.

Taphole Clay Functions:
1.Block the tap hole,need the stemming with good filling ability and Sinterability.
2.Stable Tapping ,required stemming easy open corrosion resistance,abrasion resistance
3.Easy to operation ,easy drilling..
4.Moderate plasticity, easy to operation and forming the tophole balling
5.Protect the cylinder,need stemming quickly heating no crack,and high adhesive strength for fresh and old stemming.
6.Good volume stability,under high termperature have small change on the volume,no leakage of motlen iron ,
because of volume hange.

Anhydrous Stemming Advantages:
1.High strength ,ensure the blast furnace in stable condition,in order to make the blast furnace have increase production rate.
2.Strong slag resistance ,low consumption ,one fifth of enhydrous stemming.
3.Has a certain expansion performance,have suitable airhole ratio and strength,can exceed 2000m3 blast-furnace .
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