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題名 | 轉爐渣改質技術在中鋼之應用與突破=The Application and Breakthrough of BOF Slag Modification Technique in CSC |
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作者 | 李育成; 楊金成; 蔡立文; 俞明塗; | 書刊名 | 鑛冶 |
卷期 | 58:4=228 2014.12[民103.12] |
頁次 | 頁23-32 |
分類號 | 440.327 |
關鍵詞 | 轉爐石; 水化; 熱渣改質; 轉爐渣改質站; 噴吹管; 改質劑; 渣調質劑; BOF slag; Hydration reaction; Hot stage slag modification technique; Hot stage BOF slag modification station; Injection lance; Slag reactant; Slag modifier; |
語文 | 中文(Chinese) |
中文摘要 | 為提升轉爐渣之安定性,中鋼公司於實驗室評估五種商業化之轉爐渣處理方法後,確認唯有熱渣改質方法方可讓轉爐石永久安定化,因此,乃利用煉鋼廠既有設備克難式完成26次試驗,確認未濺渣護爐爐渣可有效予以成功改質。有鑑於擬引進之國外設備造價高昂,乃自行規劃建置轉爐渣改質實驗線,並建立自有之改質技術。經相關部門通力合作,於2012年6月完成年處理量60萬噸之全世界第一大改質處理站的設計與建置。惟熱試俥初期改質成功率僅約27%,因此,乃進一步規劃從原渣渣性解析、渣桶等待及運送時程管控、噴吹管型式與複合吹煉模式應用、改質劑種類及吹送模式、渣調質劑種類選用與添加模式、不同噴吹氣體比率及線上即時QC檢驗系統等十個不同技術層面深入研究改善改質合格率。目前研究結果顯示轉爐渣改質站於2014年4月下旬開始兩班式連續操作,經適當進料條件管制下,改質成功率已由試俥初期之27%提升至目前的94%之世界高水準,領先其他鋼鐵廠,建立自有轉爐渣改質技術,解決轉爐石體積膨脹問題,有助於資源化再利用比率之提升。 |
英文摘要 | Solving the volumetric expansion problem of BOF slag is vital for slag recycling and reuse. To stabilize the volume of BOF slag, 5 commercialized strategies for slag treatment were tried and evaluated. Among them, hot stage slag modification technique was thought to be the most effective way for volumetric stabilization of BOF slag. Prior to establishing the HBMs (hot stage BOF slag modification station) in CSC, 26 preliminary experiments were carried out at the de-sulfurization station in the factory. Based on the trials, it was found that the volumetric expansion of the BOF slag was inhibited after applying the slag modification procedure without doing slag splashing procedure. To save the cost of importing hot stage BOF slag modification setup, we devote efforts to build our own HBMs equipment. Through collaborating with different divisions in CSC, the HBMs with largest capacity (600 k tons annually) in the world was set up in June, 2012. Initially, the successful rate of the BOF slag modification was only 27%. For further improving the successful rate, the influences of various factors such as the slag properties, modification procedure, types of lances, modules of injecting, types of reactant and additives (slag modifier) and their corresponding injection and addition procedure, different ratios of gas blowing as well as online QC examination system were studied intensely. Since April, 2014, the successful rate of BOF slag modification rose to 94%, which is much higher than the value (27%) we obtained from the initial setup. The high successful modification rate is the best-ever achieved among the other steel factories in the world. By establishing and developing our own HBMs and technique, the volumetric expansion problem of BOF slag is solved, which shows promise for BOF slag recycling and reuse. |
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