The tube bloom made by this method has given out the same physical and chemical test results as that made by basic open-hearth furnace + vacuumdegassingprocess + ESR process.
Nevertherless, basic oxygen furnace process with heated ladle refining and vacuumdegassing may also be considered as acceptable.
不过，带加热钢水包精炼及真空除气的氧气顶吹转炉工艺也可接受。？
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Thisarticle briefly introduces the secondary refining and discusses it with emphasis on vacuumdegassing, vacuum ladle refining and refining process of stainless steel, etc.