エレクトロスラグ融解用酸化物系スラグの冶金学的検討

概要

論文の詳細を見る
The applicability of oxide-base slag were examined, because fluoride-base slag, usually used for electroslag remelting, sometimes accompanies fluorine emission during remelting. CaO-Al_2O_3-base slag were chosen and remelting were carried out by furnaces with 80mm in diameter and with 360mm. Operational characteristics and qualities of ingot were assessed in comparison with fluoride-base slag. Results obtained are as follows : (1) There is no trouble in operation with oxide-base slag with no fuming and good electric stability. (2) Tendency to form heterogeneous slag skin is improved by a small addition of CaF_2. (3) Behaviors of elements are little affected with oxide-base slag because of the low activity of iron oxide in slag. Furthermore, excellent deoxidation and desulphurization are attained. (4) Because oxide-base slag has a small partition ratio of hydrogen, (H)/[H], remelting must be carried out more carefully to the moisture of slag. During remelting, however, the effect of the moisture in atmosphere is a little because of small transfer coefficient of hyrogen through gas-slag interface. (5) Power consumption decreases about 20∿40% with oxide-base slag. Accordingly, it may be possible that CaO-Al_2O_3-base slag takes the place of fluoride-base slag.
社団法人日本鉄鋼協会の論文
1978-09-01