Control of Wall Accretion by Lowering the Stockline in Xingang No.10 BF
Wall accretion occurs in Xingang No.10 BF due to great variation of sinter quality,instability of furnace condition,and frequent occurrence of stock column channeling problem.To control the wall accretion,the method of lowering the stock-line is attempted initially.While lowering the stockline,the furnace condition becomes more and more stable,and reinstates within 24 hours as charging resumes.It is suggested to carefully check the changes of H2 and O2 content in the gas to ensure H2 content is ≤12％while lowering the stockline;When the stockline is lowered to the point that the upper part of wall ac-cretion appear,the lower part of the accretion is scoured by the high temperature gas flow,and the upper part is cooled by the atomized water sprayed from the furnace top,the accretion will crack and drop due to temperature change mainly.With the wall accretion controlled,the main techno-economic indicators significantly improve:the daily output increases by 155 t/d,the gas utilization rate increases by 1.1％,and the fuel rate decreases by 10kg/t.
NETL
NSTL
万方数据
