Pig iron fettling process for converter

• Main Authors: DU YONG, GENG KUN, WU GUOCHAO, HAN WENBIN, CHEN ZHIZHONG, XU PEIJIANG
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2024
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

The invention relates to the technical field of fettling, in particular to a fettling process of pig iron for a converter, which comprises the following steps: S1, derusting pig iron for fettling; s2, pig iron blocks for fettling are smashed and screened; s3, determining the missing depth and size; s4, preparing pig iron blocks; s5, pig iron block filling operation; s6, the molten pig iron blocks are subjected to fettling operation; and S7, smelting for the first time after fettling. According to the method, the pig iron blocks are cleaned and rust on the outer sides of the pig iron blocks is removed through rust removal treatment of the pig iron blocks for fettling, the fettling firmness is improved, the pig iron blocks are treated by smashing and screening the pig iron blocks for fettling, so that the pig iron blocks can be uniformly filled in the deficient positions of the inner wall of the converter, the flatness of the repaired positions after fettling is facilitated, and the service life of the converte