On April 28, it was reported that the information of the China National Intellectual Property Administration showed that Shanxi Taigang Stainless Steel Co., Ltd. applied for a patent entitled "a fast change tundish method of round billet continuous casting Ф 390 specification", with the authorization announcement number of CN117600453B and the authorization announcement date of April 24, 2026. Application Publication Number: CN117600453A, Application Number: CN202211003193.7, Application Publication Date: April 24, 2026, Application Date: August 22, 2022, Inventors: Guo Jianjun, Song Miao, Zhang Baoshi, Zhao Qiankun, Meng Xiansen, Liu Huan, Hao Xuming, Zhang Haiying, Patent Agency: Taiyuan Keruida Patent Agency Co., Ltd., Patent Agent: Liu Baoxian, Classification Numbers: B22D41/56, B22D41/00.

The patent abstract shows that the present invention belongs to the field of casting technology, and particularly relates to a method for quick change of round billet continuous casting with a specification of Ø 390; The technical solution includes: 1) connector design; 2) Adjustment of process parameters for quick change of intermediate packaging; 3) Salvage; 4) Fast change process rhythm control; 5) Open a small opening on each side of the crystallizer cover plate that can be closed, open it before changing the package, and close it after changing the package. The present invention has the advantages of short replacement process time and firm connection between new and old castings.