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| Research on Construction and Type of Coal Lance for Blast Furnace |
| SU Yunlong1,LI Xiaojing1,JIN Jun1,SONG Canyang1,HU Binsheng2 |
| 1.Technology Center of Maanshan Iron and Steel Company Limited，Ma’anshan 243000， Anhui, China； 2.Metallurgical and Resources Institute of Hebei Science and Engineering Institute， Tangshan 063000，Hebei, China |
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Abstract The effect of single coal lance, concentric oxygencoal lance and double coal lance on combustion rate of pulverized coal was studied in laboratory.The results demonstrate that combustion rate of pulverized coal of double coal lance was remarkably higher than that of single lance and concentric oxygencoal lance.The relation between combustion of pulverized coal and construction parameters of double coal lance,such as horizontal intersection angle，circumferential angle and relative location was investigated.Combustion rate of pulverized coal was gradually improved with increasing horizontal intersection angle,but the degree of improvement was decreased when increasing horizontal intersection angle increased further after a suitable angle.Circumferential angle influenced hardly combustion rate of pulverized coal.It’s beneficial to improve combustion rate of pulverized coal that Alance was fixed while Blance was moved away combustion chamber from reference location.
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Received: 01 January 1900
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2008, Vol. 43 
