Improvement measures for slag defects in continuous casting bloom

MENG Qing-yu,MA Qiang

Continuous Casting ›› 2017, Vol. 36 ›› Issue (03) : 25-29.

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Continuous Casting ›› 2017, Vol. 36 ›› Issue (03) : 25-29. DOI: 10.13228/j.boyuan.issn1005-4006.20160106
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Improvement measures for slag defects in continuous casting bloom

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Abstract

Objections of the slag defects were classified and the slag distribution was investigated. It was found that the slag defects were mainly occurred in the casting head bloom. Based on the improvement of the type of the immersion nozzle from single hole to double hole and the calculation of the head crop cutting length, it was considered that the length of the cutting head was more suitable controlled by about 1 meter under the current working condition. From the inspection of macro etch test results before and after the improvement, the proportion of slag defect decreased from 17% to 0. At the same time, from the customer quality objection feedback, slag defects had also been significantly reduced.

Key words

slag defect, head bloom, submerged entry nozzle, non-steady state

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MENG Qiang-Yu. Improvement measures for slag defects in continuous casting bloom[J]. Continuous Casting, 2017, 36(03): 25-29 https://doi.org/10.13228/j.boyuan.issn1005-4006.20160106

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