摘要
分析了铁水脱硅预处理后炉渣起泡原因及机理,通过实验验证并提出了抑制炉渣发泡的措施.研究表明:将氧化剂连续、分散加入铁液,可减少单位时间内发泡气体的产生量,有利于抑制炉渣发泡.1450℃条件下,当碱度为0.6～0.8,w(MgO)为10%～20%时,碱度升高或w(MgO)增加,炉渣黏度呈降低趋势,密度变化不大,而发泡高度和发泡指数明显减小.随着w(MgO)增加,炉渣表面张力增大.炉渣碱度为0.8、w(MgO)为20%时,发泡性能最弱.向脱硅渣中加入适量CaO或MgO,可改变炉渣的物理化学性质,抑制炉渣发泡.
The foaming mechanics of desiliconisation slag in the hot metal pretreatment process was discussed and some methods to restrain the foam were proposed based on the results of the experiment. When the content of MgO is in the range of 10% to 20%, and the basicity is 0.6～0.8 at 1 450 ℃, the research results show that： （1） the viscosity of the slag is decreased with the increase of the basicity or w（MgO）, （2） The surface tension is increased when w（MgO） increases, （3） The basicity or w（MgO） has little influence on the desity of the CaO-SiO2-MgO slag system, （4） With increasing of the slag basicity, foaming index obviously decreases. The slag has the worst foaming performance when basicity is 0.8 and w（MgO） is 20%. So the foaming slag could be controlled by composition adjustment in hot metal pretreatment process.
出处
《材料与冶金学报》
CAS
2010年第3期168-172,共5页
Journal of Materials and Metallurgy
关键词
脱硅渣
炉渣碱度
黏度
发泡性能
desiliconisation slag
viscosity
basicity
foaming performance
