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Use of Sintered Calcium Oxide Nozzles in the Continuous Casting of Aluminum-Killed Steel. (Pamphlet). The clogging of lundish nozzles, caused by AI,O,, deposition. IS the main problem in the continuous casting of Al-killed steel Particularly serious problems are to b e expected when the Al con tent of the steel 6
120-180 ppm Many attempls have been made to solve this problem using different techniques, such as addition of Ca-Si to the liquid steel to form calcium aluminales which prevent AI,O., precipitation and improve the castability of the steel. use of nozzles with porous walls through which inert gas can be fed The research has led to the developmenl of a calcium oxide tundish nozzle having the following characteristics-formation of low melting products by reaction between AI,O, and CaO to avoid precipitation of the alumina which then adheres to the nozzle wall, high resistance l o erosion caused by steel flow and high resistance to thermal shock -AA
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