Pulverized Coal Concentration Distribution of Oxygen-coal lance of Blast Furnace
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摘要: 利用開發的紅外透射法粉體濃度計算機測定系統,在高爐氧煤噴吹氣-固兩相流動模擬裝置上測定了氧煤槍的煤粉濃度場。結果表明,在直吹管內氧煤槍出口前端截面附近,煤粉濃度呈不對稱分布狀態。在射流流動方向所對應的半徑一側,煤粉濃度較大,但通過調節槍位可以改善這種狀況。直吹管內氣-固兩相的摻混甚為劇烈,使得在氧煤槍出口前端軸向距離為2.5倍,直吹管直徑的截面上氣-固兩相混合均勻。Abstract: The concentration distribution of pulverized coal in blowpipe of blast furnace was measured in an isothermal two-phase model by means of a computer measuring system based on infrared transmission. The results show that concentration near the exit of oxygen-coal lance is distributed unsymetrically and that the concentration along the direction of the gas-solid jet is much higher. The concentration distributions in the distance about 2.5 times diameter of blowpipe from the exit of the lance tend to be uniform due to the mixing of gas and solid phase rapidly in blowpipe.
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