Nevertherless, basicoxygen furnace process with heated ladle refining and vacuum degassing 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。？
2
Basic structure of RH furnace multifunctional oxygen lance, composition of control system, main functions and control process of the oxygen lance are introduced, and control index is given.