生石灰系脫硫劑應用於鐵水脫硫處理之開發

The Development of Lime-based Desulphurization of Hot Metal at CSC

陳慶洪(C. H. Chen) ； 黃虎雄(H. H. Huang) ； 陳啟泰(C. T. Chen) ； 蔣敏祥(M. H. Chiang)

《鑛冶：中國鑛冶工程學會會刊》 29卷2期 (1985/06) Pp. 134-145

https://doi.org/10.30069/MM.198506_29(2).0012

摘要

中鋼公司在二階段擴建完成，卽增添一座魚雷車吹射脫硫之設備，使用電石系脫硫劑進行鐵水之脫硫處理。由於電石為消耗高能源產製之化學品，價格高昂。本公司為減低脱硫成本並兼顧處理效果，乃進行各種生石灰系脱硫劑之開發。本文敍述此研究開發之經過。文中根據實驗室及脫硫站所得之試驗結果對各種處理劑之脱硫效果，溫度及其他操作因素之影響予以探討，並對脫硫之可能反應機構作概略性之説明。實驗室之試驗結果，顯示在CaO粉末內加入少許之冰晶石，依溫度而定，可提升純CaO粉脱硫率約1.6-5.3倍。其他價廉之生石灰系劑有可能取代電石系劑者有CaO-Al_2O_3渣-CaF_2-C，CaO-CaCO_3-CaF_2-C，CaO-Al粉-CaF_2-C及CaO-CaCl_2-CaF_2-C等，在使用生石灰系劑於魚雷車脫硫時，為得有效之處理結果，魚雷車之除渣作業，帶動氣體氮氣之流量，起始硫含量，及處理劑用量均為主要之考慮因素。可能之經濟效益也作了估算。

並列摘要

Since the sulphur content of hot metal produced by the No. 1 BF at CSC was relatively high before 1979, the desulphurization of hot metal became a necessary process in producing low-sulphur steels. CSC installed the ATH type torpedo car injection desulphurizing equipment and started operation by using CaC_2 as reagent in 1980. However, CaC_2 is an expensive though effective agent in use. The initial sulphur content of hot metel was lowered to around 0.035% in 1981, and the development of lower-cost, nearly effective desulphurizers, such as lime-based reagent was intiated. This paper reports the progress of the development for the CaO-based desulphurization of hot metal at CSC. The effectiveness of various lime-based mixtures, the effects of operational parameters and temperature, and possible mechanisms of reactions are discussed qualitatively based on the results obtained from the laboratory and plant studies. The improved efficiency of desulphurization and the decrease in the cost of the treatment by using lime-based desulphurizer are also reported.