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| 題 名 | 石灰石煅燒特性和冷卻現象研究=Research of Calcination Characteristics and Surface Cooling Mechanism of Limestone |
|---|---|
| 作 者 | 黃永達; 張顧齡; 劉永章; | 書刊名 | 燃燒季刊 |
| 卷 期 | 33:1=124 2024.02[民113.02] |
| 頁 次 | 頁26-34 |
| 分類號 | 472.36 |
| 關鍵詞 | 石灰石煅燒; 表面冷卻速率; 高溫試驗; 理論計算; Calcination of limestone; Surface temperature reduction rates; High-temperature experiments; Theoretical predictions; |
| 語 文 | 中文(Chinese) |
| DOI | 10.30041/CQ.202402_(124).0003 |
| 中文摘要 | 石灰為轉爐煉鋼製程重要原料,經石灰窯高溫煅燒石灰石生成,當未完全燒 透之石灰石投入轉爐,因 CaO 含量低,鋼液脫除雜質磷之效率不佳,造成最終 鋼液成分無法滿足目標,且未完全燒透之石灰石殘留 CO2 高,冶煉過程會產生大 量 CO/CO2 ,逸散時會造成鋼液和渣噴濺,影響生產。另一方面,未完全燒透之 石灰石,因仍保留較緻密 CaCO3 層,表面溫降速率慢,於輸送過程中,易導致輸 送皮帶受熱而損壞。因此,本研究針對不同粒徑石灰石進行高溫試驗,觀察煅燒 現象,並透過理論計算預測石灰石煅燒透特性和表面溫降速率,可作為石灰窯煅 燒參數調整之參考依據,以生產高品質之石灰,進而提高煉鋼效率。 |
| 英文摘要 | Lime is a crucial raw material in steelmaking process and is produced by calcination of limestone in lime kilns. When incompletely calcined limestone is charged into the converter, its low CaO content leads to inefficient removal of phosphorus in molten steel. Consequently, the final steel composition fails to meet the target specifications. In addition, incompletely calcined limestone retains a higher content of CO2 , resulting in the generation of large amounts of CO/CO2 during the smelting process. The escaped gases can cause splashing of molten steel and slag, adversely affecting production. On the other hand, incompletely calcined limestone retains a dense CaCO3 layer, causing a slow decrease in surface temperature. During transportation, this can lead to overheating and damage to conveyor belts. Therefore, this study conducts high-temperature experiments on limestone with different sizes to observe the calcination phenomena. Also, the calcination characteristics and surface temperature cooling rates of limestone are predicted through theoretical calculations. This information can be used as a reference for adjusting the calcining parameters of lime kiln, aiming to produce high-quality lime and consequently improved the steelmaking productivity. |
本系統中英文摘要資訊取自各篇刊載內容。