primary control vesselとは 意味・読み方・使い方

At deoxidation treatment, the following treatments are performed: primary deoxidation treatment where oxygen concentration in atmosphere in a melting vessel is controlled to ≤0.1 vol.% and an Si-Mn-based deoxidizer is added to carry out deoxidation; and secondary deoxidation treatment where an Al-based deoxidizer is added to the molten metal in the above vessel to control oxygen concentration in the molten alloy to ≤50 ppm.例文帳に追加

脱酸処理の際に、溶解容器内雰囲気中の酸素濃度を0.1vol%以下に制御すると共に、Si、Mn系脱酸剤を添加して脱酸する一次脱酸処理を行い、その後さらに、前記容器内合金溶湯中にAl系脱酸剤を添加して合金溶湯中の酸素濃度を50ppm以下に制御する二次脱酸処理を行う。 - 特許庁