Regulation of Removal Process of Non-Metallic Inclusions at Secondary Treatment of Melt
DOI:
https://doi.org/10.20535/1810-0546.2015.6.72717Keywords:
Blowing intensity, Ladle, Non-metallic inclusionsAbstract
Background. When secondary refining with inert gases, blowing intensity of metal is generally maintained at a constant level and limited by the level of metal in the ladle. Recent studies show that the blowing intensity effect to remove impurities of different size, so there is the problem of regulating this process.
Objective. The aim of the investigation is to research the process of removing non-metallic inclusions from the metal in the ladle by blowing an inert gas in order to increase the efficiency of removing impurities and preventing the emission of metal from the ladle when blowing.
Methods. The regulation of removing non-metallic inclusions from steel by changing the blowing intensity in ladle is described. The structural scheme of regulation circuit to control the process of purging the metal in the ladle is created. An example of regulation of removing non-metallic inclusions from steel in the 160-ton ladle has been given.
Results. Changing the blowing intensity, giving it a fluctuating nature, in which the maximum intensity is the minimum size of nonmetallic inclusions to be removed and the minimum - maximum possible size of inclusions and frequency - a free ladle capacity, increased efficiency removal of inclusions has been established.
Conclusions. It is shown that the determination of probability size of inclusions and free volume of the ladle to regulate the blowing intensity of metal, improve mixing of metal in the ladle warning metal emissions and ensure complete removal of non-metallic inclusions of various sizes.
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