樋型炉でのソーダ灰による溶銑の連続精錬(脱りん・脱硫 : ソーダ系スラグ)(<特集>溶銑処理の発展)

概要

論文の詳細を見る
Studies on the continuous refining of hot metal with soda ash were performed using the trough-type continuous refining furnace. The furnace had ability to process the hot metal at the rate of 45t/h. 1) [P] and [S] after refining were lowered to 0.015% and less than 0.005% respectively, at the consumption of 20kg・Na_2CO_3 per ton of hot metal(t・HM). 2) Oxidized amount of [Mn] in the refining was 0.08% and nitrogen of refined hot metal was also removed to 10 to 20 ppm. 3) Owing to low iron oxide and iron particle content of the Na_2CO_3 slag, iron loss in the refining was nearly 2.5 kg/t・HM. 4) Temperature drop of hot metal due to the decomposition and evaporation of charged soda ash was estimated as 4.6℃/kg・Na_2CO_3/t・HM and heat loss in the continuous refining was calculated as 6.5×10^3 kcal/t・HM. Estimation of dephosphorization degree of the refined hot metal by reaction model and the characteristics of continuous refining were discussed.
社団法人日本鉄鋼協会の論文
1983-11-01