Blast furnace trough is employed to transfer the molten iron tapped from the blast furnace to torpedo cars. Appropriate refractories are applied to the respective troughs in consideration of operational conditions.
To maintain stable molten iron transfer and sufficient durability even under severe operational conditions of relatively high productivity coefficients or relatively high iron temperatures, it is important to select the proper refractories for blast furnaces operation being based on abundant field performance.
General requirements of trough refractories are:
1)Easy to install (appropriate fluidity and hardening time)
2)Good resistance to corrosion and impregnation (resistance against slag and FeO attack)
3)Abrasion resistance
4)High resistance to oxidation
5)High resistance to thermal shock and high stability
6)High residual mechanical strength, which resist mechanical abuse at wrecking
Generally in the main trough, local wear damage is observed at the slag line (the air/slag interface) and also at the metal line (the slag/metal interface). At slag line, SiC material of high silicon carbide content for excellent resistance against slag attack. At metal line, Spinel material with lower silicon carbide content for excellent resistance against FeO attack. Plotting the entire wear to be as even as possible.
Mehran Ceramics is a leading manufacturers and suppliers of refractory and industrial ceramics. mehranceramics.com
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