頁籤選單縮合
題 名 | Simulation of Heat Transfer of Defective Copper Stave with Installing Flexible Pipe or Cigar Cooler |
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作 者 | Ho, Chung-ken; CHen, You-zong; Tung, Che-hsiung; | 書刊名 | China Steel Technical Report |
卷 期 | 26 2013.12[民102.12] |
頁 次 | 頁13-17 |
分類號 | 454.89 |
關鍵詞 | Blast furnace; Copper stave; Flexible pipe; Cigar cooler; |
語 文 | 英文(English) |
英文摘要 | The No. 2 blast furnace (BF) at China Steel (CSC) installed a copper stave for the first time in its new campaign of January 2006. Unfortunately, the copper stave channel showed leakage at the lower shaft in September 2011. For maintaining the stave, the flexible pipe and cigar cooler are installed depending on the damage extent. In this study, the heat transfer behavior of a defective copper stave with installing flexible pipe or cigar cooler has been analyzed. Compared with measured data from copper stave with label S9-33 at No. 2 BF during stable operation, the hot gas temperature is inferred about 400 oC. The cooling ability of 4 flexible pipes with low thermal conductivity 1.5 W/m/ oC is not sufficient during stable operation. The grouting materials with high thermal conductivity 15 W/m/ oC is preferred and suggested. The defective cooper stave with 24 cigar coolers is acceptable during stable operation. However, the shell temperatures in cigar cooler case are larger than 200oC with any kinds of grouting material, when the hot gas temperature is 1200oC. In the mean time, to control the hot gas temperature becomes very important to protect the furnace shell of a copper stave with 24 cigar coolers. |
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