Effect of B_2O_3 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%.

• 2011-05-15

著者

• Wang Hongming

  Department Of Materials Science And Engineering Jiangsu University

• Li Guirong

  Department Of Materials Science And Engineering Jiangsu University

• Zhu Hua

  Department Of Chemistry Nanjing University

• Wang Jianhua

  Jiangsu Sha-steel Group

• Yan Yongqi

  Department Of Materials Science And Engineering Jiangsu University

• ZHANG Tingwang

  Department of Materials Science and Engineering, Jiangsu University

• Zhang Tingwang

  Department Of Materials Science And Engineering Jiangsu University

関連論文

• Decomposition of N-Nitrosamines over Zeolites
• Berberine-Improved Visceral White Adipose Tissue Insulin Resistance Associated with Altered Sterol Regulatory Element-Binding Proteins, Liver X Receptors, and Peroxisome Proliferator-Activated Receptors Transcriptional Programs in Diabetic Hamsters
• Experimental Study on Mould Oscillation-less Continuous Casting Process under High Frequency Amplitude-modulated Magnetic Field
• Effect of Additives on Viscosity of LATS Refining Ladle Slag
• Beneficial effect of berberine on hepatic insulin resistance in diabetic hamsters possibly involves in SREBPs, LXRα and PPARα transcriptional programs
• Effect of B_2O_3 on Melting Temperature, Viscosity and Desulfurization Capacity of CaO-based Refining Flux
• Mathematical Heat Transfer Model Research for the Improvement of Continuous Casting Slab Temperature

スポンサーリンク