- 期刊
鋼廠連鑄冷卻水系統之CaF_2分散劑的開發
Development of CaF_2 Scale Dispersant for the Open Cooling Water System of Continuous Casting Process
摘要
連鑄製程為鋼鐵產品最為重要的生產製程，因為全球有將近85%的鋼胚均以連鑄程序製作而成。鋼胚品質的優劣則主要取決於鋼胚成形過程中所使用冷卻水的冷卻效率與噴灑幅度，然而連鑄系統之冷卻水的使用時常為了節水之效，而會在一次冷卻區的噴嘴處產生CaF_2垢進而影響鋼品品質。本研究旨於CaF_2分散劑的開發，以避免冷卻水噴嘴系統的阻塞。實驗室測試結果顯示所研發之水化學品具有以下功能（1）藉由螯合反應減緩CaF_2垢的生成動力；（2）抑制CaF_2（111）晶面的成長，將熱力學上穩定的立方結構轉變為形貌蓬鬆的軟垢；（3）穩定鑄粉的表面電位，避免未燒熔鑄粉之凝聚效應而造成噴嘴阻塞。經實廠驗證在所研發水化學品的參與下，冷卻水系統之噴嘴阻塞率由74%大幅下降至6%，冷卻設備的利用時間提升3倍之多，大幅提升了扁鋼胚的產量及品質。
並列摘要
Continuous casting process produced 85% of the worldwide slabs. The quality of the manufactured slabs was mainly dependent on cooling the efficiency and distribution of sprayed cooling water. Often, in the production process, the formation of CaF_2 scale in the high cycles of concentrated cooling water clogged the spray nozzle in the first cooling zone, lowering efficiency the cooling water. Therefore, this study aimed to develop a CaF_2 scale dispersant that would inhibit the formation of CaF_2 scale. Our laboratory results showed that the CaF_2 scale dispersant developed in this study can: (1) reduce the scaling kinetic of CaF_2 by efficiently chelating with Ca^(2+), (2) inhibit the growth kinetic of crystal plane (111) of cubic CaF_2, resulting in a morphology transformation to irregular and frangible CaF_2, and (3) stabilize the suspension of unmelted casting powder preventing the nozzle clogging. Field test demonstrated that the clogging ratio of nozzle tips with the CaF_2 dispersant in cooling water was 6% while without the CaF_2 dispersant 54%. The service time of mold was increased by 3 times as compared to the case without the presence of CaF_2 dispersant. The decreased clogging ratio of nozzle tips and prolonged service period of mold improved quality of the slabs and productivity.
延伸閱讀
- Jeng, L. Y. (2011). 結合水冷與蒸汽壓縮冷卻之創新混合系統應用於高功率密度電子散熱之研究 [doctoral dissertation, National Taipei University of Technology]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0006-1801201109105900
- 張世賢、陳翊銓、吳坤齡、劉沖明、唐德謙（2014）。以不同時間之直流脈衝電漿化學氣相沉積法蒸鍍DLC薄膜於氮氧化處理ASP23高速鋼之研究。鑛冶：中國鑛冶工程學會會刊，58(1)，132-138。https://doi.org/10.30069/MM.201403_58(1).0011
- 王啓川（2001）。多成分混合物的冷凝器與蒸發器的熱流設計（上）。冷凍與空調，(12)，53-64。https://doi.org/10.7087/JRACT.200112.0053
- 陳浚科（2011）。Research and Application of the OCC Heated Mold Continuous Casting Method〔碩士論文，國立虎尾科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0028-2507201112385200
- 蔡德昌、林冠儒、曾名輝、黃柏偉（2018）。Improving Consolidating Shrinkage Pipe for End Slab of Continuous Casting。鑛冶：中國鑛冶工程學會會刊，62(4)，70-75。https://doi.org/10.30069/MM.201812_62(4).0005