近日,从国家知识产权局获悉:由承德钢铁集团有限公司炼钢厂发明并申请的“惰性气体保护下的顶渣精炼方法”被授予国家专利权。为此,承钢炼钢厂共有“混铁炉出铁口加盖保温”、“钒球合金化”、“利用转炉包渣改造炼钢渣系”、“顶底侧复吹提钒工艺的开发”等6项技术获得国家专 Recently, the State Intellectual Property Office was informed that the “top slag refining method under the inert gas protection” invented and applied by the steelworks of Chengde Iron & Steel Group Co., Ltd. was granted the national patent right. To this end, a total of steelmaking steel mills, “mixed iron taphole stamped insulation”, “vanadium ball alloying”, “the use of converter slag slag system transformation”, “top and bottom side blowing blowing vanadium process Development ”and other six technology access to national specialization