Effect of B2O3 on Melting Temperature, Viscosity and Desulfurization Capacity of CaO–based Refining Flux
スポンサーリンク
概要
- 論文の詳細を見る
Fluorite is widely employed as fluxing agent in metallurgy flux, which inevitably leads to serious fluorine pollution. In this work, B2O3 is used as fluxing agent of CaO–based refining flux to substitute for CaF2 so as to decrease the melting temperature and to improve the speed of slag forming and the refining efficiency. The effects of B2O3 on the melting temperature, viscosity and desulfurization capacity of CaO–based refining flux were investigated. The results indicate that the fluxing action of B2O3 is better than that of CaF2 and Al2O3. For the high basicity CaO–based refining flux (mass ratio of CaO/SiO2 is 5.0–8.75), when CaF2 is substituted with B2O3, the melting temperature can be decreased remarkably. Especially, when the mass ratios of CaO/Al2O3 and CaO/SiO2 are in range of 1.1–4.0 and 5.25–8.0, respectively, the flux melting temperature is lower than 1300°C. At the same time, the temperature range, in which the flux viscosity is low, is expanded as well as the stability of flux viscosity varying with temperature is improved obviously. These variations of flux properties are favorable for refining process. The results of experiments on sulphur partition equilibrium between metal and flux indicate that the desulfurization capacity of flux can be improved markedly when CaF2 is substituted with equal mass of B2O3. When 4 mass% B2O3 is employed as fluxing agent and the mass ratio of CaO/Al2O3 is in the range of 1.5–7.0, the final sulfur content of metal can be controlled lower than 0.004%.
論文 | ランダム
- 産婦人科の戦慄(4)石原都知事は妊婦と遺族に謝罪せよ!--「妊婦たらい回し事件」最終結論
- 「海の森」と「再生の森」の結合--石原都知事に提案する
- 人間回路 東京都副知事・猪瀬直樹氏 石原都知事の右腕
- 追及 新銀行東京 内部記録は語る 「石原都知事ファミリー」「口利き案件」--石原印の国会議員、都議、秘書らの名が続々と
- 追い込まれる石原都知事 トヨタも逃げ出す「新銀行東京」