w(MgO)对高钛高炉渣黏流特性的影响

Influence of w(MgO) on Viscous Flow Property of High Ti-containing Blast Furnace Slag

针对攀西地区高镁型钒钛磁铁矿用量增加、高炉渣中MgO质量分数逐渐升高的特点,开展了w（MgO）对含TiC、TiN、Ti（C,N）等高熔点物质的高钛型高炉渣黏流特性影响的试验研究。结果表明,对于w（TiO2）=20%、w（A12O3）=14%、二元碱度R2为1.0～1.2的高炉渣,w（MgO）由8%增加到12%时,熔化性温度由1332℃升高到1364℃,炉渣趋于＂短渣＂特性;1450℃以上时,炉渣黏度低于0.3 Pa·s,仍具有良好的流动性,可满足高炉生产要求。

It is well known that the increasing dosage of high Mg-containing V-bearing titanomagnetite,the iron ore was adopted for the iron works at Panxi area of the Southwest China and correspondingly the MgO content（% mass fraction） increased gradually in the blast furnace slag.In view of the above fact,it is meaningful to investigate the influence of MgO content on the viscous flow property of high-Ti blast furnace slag containing high melting point material,such as TiC,TiN,Ti（C,N） etc.Results show that the blast furnace slag containing 20% TiO2 and 14% A12O3 presents the so call ＂short slag＂ characteristic with binary basicity R2 in a range of 1.0~1.2,of which the melting temperature increases from 1332℃ to1364℃ with the increasing MgO content from 8% to 12%.At temperatures above 1450℃,the slag viscosity is lower than 0.3 Pa·s with a good liquidity,which can meet the requirements for the smooth operation of blast furnace.