Title: A model and application of the BF tuyere erosion by pulverized coal injection
Abstract:More than 80 percent of tuyeres are damaged by pulverized coal injection. At the downside of blast furnace tuyere, the erosion due to single pulverized coal injection is analyzed and studied. Based on...More than 80 percent of tuyeres are damaged by pulverized coal injection. At the downside of blast furnace tuyere, the erosion due to single pulverized coal injection is analyzed and studied. Based on the case of tuyere, a mathematical model is established to predict the service life of tuyere that can be described as δ m=ρ pρ cH sH ce(D-d)2πD2C p| r=Rv mE′cosθ . The calculated results of the model show that the erosion of blast furnace tuyere has a very close relation with injection rate of pulverized coal, characteristics of tuyere materials, geometrical shape of the tuyere, blast velocity, half tuyere angle and diameter of pulverized coal particle, etc. Finally,some measures to enhance service life of BF tuyere are given in the case with the same injection rate of pulverized coal such as reducing the consistence of pulverized coal particle near the surface of BF tuyere, changing the material of the surface of BF tuyere and using less diameter of pulverized coal particle. Average service life of 272 days predicted by the model is coincided with actual service life of tuyere that is 260 days in an Iron Steel Group Company of China. The reliability and the generality of the model is well tested.Read More
Publication Year: 2001
Publication Date: 2001-01-01
Language: en
Type: article
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