| Production and application of low silica self-fluxed pellets in Shougang Jingtang Gele Qing1; Minge Zhao2; Gang An3; Kai Wang3; Zhixing Zhao1; 1SHOUGANG RESEARCH INSTITUTE OF TECHNOLOGY, Beijing, China; 2SHOUGANG GROUP CO., LTD, Beijing, China; 3SHOUGANG JINGTANG UNITED IRON & STEEL CO., LTD, Tangshan, China; PAPER: 90/Iron/Regular (Oral) SCHEDULED: 14:25/Tue. 29 Nov. 2022/Arcadia 1 ABSTRACT: <p>In order to reduce the fuel rate of blast furnace and promote green development, Shougang Jingtang Steel company has built two straight grate indurating machines with productivity of 8 million tons of pellets. In this paper, the production technologies of self-fluxed pellets with hydrated lime were studied successfully on the indurating machine. Hydrated lime has a good binder property, decrease the amount of bentonite and obtain low silica pellet. The basicity of pellet is 1.15 and SiO2 content is 2.0%. The low silica self-fluxed pellets were used in the three large blast furnaces with 5500m3 in Shougang Jingtang, the proportion of pellets in burden was increased from 28% to 55%, slag rate of blast furance was decreased from 280kg/tHM to 215kg/tHM, the fuel rate was decreased from 500kg/tHM to 480kg/tHM.</p> |
