Production Practice of Raising Coal Rate on Tangsteel BF
Since its startup,the blast furnace in Tangsteel New Area works unstably due to quality variation of raw materials and fuel,and such instability mainly falls on unstable gas flow and unbridled furnace operating profile,therefore the furnace has to be operated under the lower load with coal rate kept at 125-135 kg/t with the purpose of smooth running of the fur-nace.Thanks to the measures of upgrading the quality of raw materials and fuel,improving the tapping operation,optimizing the process parameters and adjusting the operation system,the coal rate gradually rises from 130kg/t to over 150kg/t,and stabilizes at 160-170kg/t with the fuel rate declined at the same time.It is believed that:(1)increasing coal rate depends on stable BF gas flow and regular furnace operating profile;(2)good quality of raw materials and fuel is the foundation of stable and smooth running of the furnace;(3)stable external conditions,minimum operation interference,and proper condi-tioning of the blasting and burden distribution for developing both the center and edge gas flow,all these are conducive to im-proving the utilization rate of pulverized coal.
blast furnacecoal rateburden mixgas flowutilization rate of pulverized coal
万方数据
维普
