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| Numerical simulation of burden， porosity and gas distributions inside shaft furnace |
| XU Kuan，BAI Ming-hua |
| （National Engineering Research Center for Equipment and Technology of Cold Strip Rolling， Yanshan University， Qinhuangdao 066004， Hebei， China） |
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Abstract In order to obtain effect of the changing operation on the burden， the porosity and the gas distributions inside the shaft furnace， a three-dimensional model is established based on the discrete element method （DEM）. The effects of the flap angle and the stock line on burden ，porosity and gas distributions in the shaft furnace are investigated and calculated by the model. The results show that the porosity distribution can not be directly reflected by the particle distribution. The porosity distribution is the most homogeneous when the flap angle is 80°. The effect of the stock line on the porosity and the particle distributions is smaller than that of the flap angle. With the increase of the stock line， the porosity distribution is more uniform， but the change of the particle distribution is insignificant. The flap angle is recommended to be 75°or 80°to control the central gas flow and be 82.5° and 85°to prevent the peripheral gas from over developing. The gas flow can be more uniform if the stock line is properly increased.
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Received: 08 November 2016
Published: 10 July 2017
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2017, Vol. 52 
