Operation of Jingtang 5 500 m3 BF Smelting with Ultra-high Percentage of Basic Pellet
For Jingtang 5 500 m3 BFs,the process of smelting with acid pellet percentage does not longer meeting the slagging requirement as the pellet percentage to furnace is＞50％,thus,the pellets with basicity higher than 1.1 are developed,and this kind of pellet percentage is maintained at about 55％,even higher than 70％max.for a single furnace.In the context of smelting under such ultra-high percentage of basic pellet,corresponding measures are taken,which mainly include:(1)im-proving the basic pellet quality,stabilizing the coke quality and controlling the basic metal load with respect to the beneficiat-ed burden materials;(2)adjusting the charging system and blasting system,setting up the appropriate heat system and slag-ging system in regard to the operating system.The three BFs achieve long-term stable running,and sound main techno-eco-nomic indicators with coke rate and fuel rate of No.1 BF dropped to min.257kg/t and 496kg/t respectively,coke load hit-ting 6.18 max.and productivity escalated to 2.62t/(m3·d)max.
super-large sized blast furnacebasic pellethigh pellet percentagecoke loadoperating system
NETL
NSTL
万方数据
