連続溶融亜鉛メッキにおけるドロス生成反応について

概要

論文の詳細を見る
A study has been carried out on the dross formation in continuous galvanizing in relation to the aluminium content in the bath. Iron and aluminium concentrations in drosses formed in conventional galvanizing lines are determined. In the laboratory, Zn alloys containing 0.22% Pb, 0.13∿0.60% Al and 0.066∿0.24% Fe are molten in graphite crucibles and held at 465℃ for 40 hrs before cooling. Using the sectioned ingots, spectroscopic analysis of the portions free from dross and quantitative microscopy analysis of dross compounds are performed. On the basis of these results, the amount of dross and that of aluminium consumed in the dross formation reaction in conventional processes are estimated. Conclusions derived are as follows : Drosses contain two compounds, namely δ and Fe_2Al_5. When the aluminium content in the bath is in the range of 0.09∿0.14%, δ and Fe_2Al_5 can coexist. In this case the higher the aluminium content, the lower the fraction of δ-compound. When the aluminium content is higher than 0.15% the δ-compound can not be found. The amount of the bottom dross is estimated to decrease rapidly with increasing the aluminium content in the bath up to 0.14% and becomes negligible above 0.15% Al. The amount of the top dross, however, increases rapidly with increasing the aluminium content up to 0.14% and decreases gradually above 0.15% Al. The amount of aluminium consumed in the dross formation reaction is estimated proportional to the amount of iron dissolved from sheets.
社団法人日本鉄鋼協会の論文
1974-01-01

連続溶融亜鉛メッキにおけるドロス生成反応について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク