• 作者： 周釋善
• 作者服務機構： 國立成功大學
• 中文摘要： 不銹鋼冶煉過程中，最重要的反應機構乃是碳及鉻的氧化，當吹氧於鋼液中，碳的氣化反應為C+ 0 -> CO (g)，鉻的氧化為2Cr＋30-Cr2Os (s) '因此在冶煉過程中，試圖找出碳及鉻的氧化趨勢，必能探討其實際應用的價值。 本篇報告依據最基木的氣化機構及一些熱力學的數據導出一套可資應用的數學模型，與L.F. Barnhardt及T. Kuwano等之實驗數據比較，發現其具有相當的準確性，進而藉其探討減壓或真空下冶煉的可能性及經濟效果，尤其對於實際的操作情況提供參考的途徑。 實驗結果，顯示大氣壓下利用不同比例A一O2：互相混台氣體吹煉有根大的經濟效益。吹煉30min，能使碳由0.56%, C降到0.16%, C，鉻同收率高達98％，所採取的比例為100 OZ，33% 02，2502，各吹鍊l0min。go實驗證實高碳範圍（0.5-0.7Y ,C）以純氧或80% O2，低碳範圍（0.4-0.2% C）以30%, O：，70%A，吹煉，可以煉製極低碳不誘鋼。 減壓冶煉方面，理想操作條件，推論結果，可採取大氣壓下，以100%O2吹煉lomin，當碳降到0.4%左右，採取減壓操作，以30mmHg，70%O2，30%, Ar 吹煉10min，然後以100mm Hg吹鍊10min-20min。
• 英文摘要： The most important reaction mechanisns in refining stainless steel areoxidation of Carbon and Chromium. The reaction of carbon is C＋O ->CO(g), and chromium is 2 Cr＋30一Cr2 CrO3 (S)．Therefore we can findout the practical value when we are able to get the direction of oxidationof carbon and chromium during the refining work. This paper is based on the basic oxidation mechanism and the Ther-modynamic data to derive a suitable mathematical model and comparedwith experimental works of Dr. LF Barnhardt and Dr. T. Kuwano et al.We have found both of the data of mathematical model and experimentare quite agreeable. Further, in terms of the model we can study the poss-bility of vacuum or low pressure refining and get the exact direction inpractical refining circumstance， Laboratory work show that the blowing of different ratio of Ar-O2 miXt-ure in refining stainless steel give a lot of economic efficiency. In the refi-ning work, the carbon content will decrease from 0.56%C to 0.016%C andthe recovery of chromium will be 98% by blowing different ratio of 100%O2, 33% O2, 25% O2, Ar-O2 mixing gases for 10 min in each process at 1atm． Mathematical model study for the vacuum refining stainless steel，theideal working condition will be: blowing 100% O2 for 10 min at 1 atm,than 70% O2 30% Ar injection for 10 min·under lower pr essure of 300mmHg, and continune blowing for 10-20 min·at 100 mm Hg pressure·
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