摘要
采用旋转柱体法测量了Al2O3-CaO二元渣的黏度,采用重锤法测量了渣的密度,采用拉筒法测量了渣的表面张力,采用四探针法测量了渣的电导率.结果表明,共晶点处熔渣的高温流动性最好,1500℃时,该渣样的粘度只有0.57Pa·s;随着CaO/Al2O3质量比增加,熔渣密度减少,表面张力减小,电导率增加;渣温为1450~1500℃时,熔渣密度在2.775~2.713g/cm3之间变化,表面张力在0.6405~0.6107N/m之间变化,电导率在0.549~1.101(-·cm)-1之间变化.该二元渣作精炼渣时重熔电耗低,去夹杂能力强.但其熔点高、粘度大,所得合金表面质量差.
The binary Al2O3-CaO system is the basic slag system for the thermit reduction and electroslag remelting refining. The viscosities of binary Al2O3-CaO slag samples were measured by rotating cylinder method, their densities measured by horizontal hammer method, surface tensions measured by slide method, and conductivities measured by four-probe method. The results indicated that the slag near eutectic point had the best high fluidity with low viscosity of 0.57 Pa·s at 1500℃. When the mass ratio of CaO/Al2O3 increased, the density and surface tension of slag decreased, while the conductivity increased. When the slag temperature varied from 1450 to 1500℃, the density of slag varied between 2.775 and 2.713 g/cm3, the surfaces tension between 0.6405 and 0.6107 N/m and the conductivity between 0.549 and 1.101 (-·cm)-1. The binary slag had the lower remelting power consumption, better refining effects and the stronger removal ability, but the surface quality of smelted alloy was poorer because of the higher melting point and the higher viscosity of slag when the Al2O3-CaO slag was used as the refining slag.
出处
《过程工程学报》
CAS
CSCD
北大核心
2009年第S1期246-249,共4页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:50874027
50644016
50704011)
国家973计划资助项目(编号:2007CB613504)
关键词
熔渣
黏度
密度
表面张力
电导率
slag
viscosity
density
surface tension
conductivity
