TiO_2影响烧结矿低温还原粉化率(RDI)的机制  

MECHANISM OF TiO_2 AFFECTING SINTER RDI

作　　者：杨华明[1] 邱冠周[1] 

机构地区：[1]中南工业大学

出　　处：《矿产综合利用》1998年第1期12-14,共3页Multipurpose Utilization of Mineral Resources

基　　金：中国有色金属工业总公司测试开放基金资助

摘　　要：研究了烧结矿矿物相显微硬度、弹性模数、断裂韧性以及烧结矿综合断裂韧性和低温还原粉化率(RDI)随TiO_2含量的变化。TiO_2含量增加恶化了烧结矿的低温还原粉化性能。电子显微分析证实:TiO_2主要分布在烧结矿的玻璃相,引起玻璃相断裂韧性的降低。研究认为烧结矿RDI增大主要由玻璃相断裂韧性的降低引起。同时也确定了烧结矿综合断裂韧性与RDI良好的对应关系。Variations of hardness ,elastic modulus, fracture toughness of sinter phase, com-posite fracture toughness of sinter and RDI with TiO2 content are investigated in this paper. Addition of TiO2 worsens the property of low-temperature reduction degradation of sinters. Electron microprobe analysis shows that TiO2 is mainly distributed in the glass phase of sin-ter, wich results in the decrease of fracture toughness of glass phase. The results indicate that it is the decrease of fracture toughness of glass phase that causes the increase of sinter RDI. A better relation between composite fracture toughness of sinters and RDI is deter-mined.

关 键 词：烧结矿 断裂韧性 二氧化钛 低温还原 粉化率 

分 类 号：TD982[矿业工程—选矿]