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Improve Blast Furnace Safety, Operational Stability and Hearth Wall Preservation With Tailored Taphole Clay Technologies

Blast furnace taphole clays are refractory materials made of alumina, silica, silicon carbide, silicon nitride and carbon (Al2O3-SiO2-SiC-Si3N4-C), bonded by tar, resin and/or synthetic oil, plastic at the temperatures of use and used to seal blast furnaces tapholes at the end of tapping. Their main functions may be divided in four2: (1) after plugging, assure the closure of the blast furnace taphole; (2) at the moment of tapping, allow its drilling; (3) assure a regular drainage of the hot metal and slag; and (4) contribute to the hearth refractory protection (“mushroom”) in the taphole region.
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2022 AISTech Conference Proceedings
PR-386-176
T.M. Oliveira, A.S. Ribeiro, W. Headrick Jr., F. Nonaka
May 01, 2022
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