中国德国炼钢连铸技术交流会的资料 .ppt

DEVELOPMENT OF RH REFINING TECHNOLOGY AT BAOSTEEL CUI Jian, WANG Zhe Baoshan Iron Steel Co., LTD October, 2019 OUTLINE Introduction Development of RH at Baosteel Development of RH Refining Technology at Baosteel Future Research on RH Refining Technology Conclusions Function of RH Degasser RH degassers have functional advanced from only dehydrogenation into a comprehensive steel refining process. With the further study on RH refining process, the scope of steel grades gradually expands, the quality of steel and the efficiency of RH process are also improving. RH vacuum degasser gradually secures its position as a predominant vacuum degassing process. Main Advance of RH Technology High efficiency and multi-function. The high efficiency of RH process refers to the promotion of the capacity of RH equipment and the reasonable optimization of RH technology. The multifunction of RH process refers to the expansion of technology and equipment. The adoption of these technologies could make RH equipment have the functions of heating and temperature compensation, forced decarbonization, desulfurization by powder injection or vessel flux addition, inclusion control, the heating of vacuum chamber, and skull removal. A Setup of RH-MFB Multi-function Lance 1、Oxygen Blowing for Forced Decarburization 2、Deskull by Vacuum Chamber Combustion Heating 3、Powder Injection Development of RH at Baosteel No.1 RH degasser was introduced in 1985 for dehydrogenation and temperature compensation for the molten steel by oxygen blowing (RH-OB). No.3 RH equipment was developed in the second phase of Baosteel building, the snorkel diameter was enlarged to 750 mm and the top oxygen-blowing lance was also equipped. In 2019, Baosteel completed No.2 RH degasser with multifunction top lance which has the functions of oxygen blowing for forced decarburization and temperature compensation for the molten steel, heating the vessel to remove the skull inside the RH ve