摘要:
采用偏光显微镜对不同TiO2含量 (7%~16%) 的高炉渣矿相结构进行系统研究。结果表明, 炉渣显微结构为斑状结构、似斑状结构;斑晶矿物主要为巴依石和黄长石, 基质为玻璃质、细小钛辉石、钙钛矿以及少量的金属Fe、TiC、TiN及其固溶体;随着TiO2配加量的增大, 炉渣中巴依石和钛辉石含量先降低后升高, 而黄长石含量先升高后降低;当TiO2含量超过12%以后, 炉渣基质中TiC、TiN及其固溶体的含量有所增加, 这些高熔点化合物会使炉渣的黏度和熔化性温度升高, 导致高炉渣的流动性变差。该研究成果可为改善含钛高炉渣的流动性能提供重要的理论依据。
Abstract:
The mineral structure of blast furnace slag with different mass percent of TiO2 （7%~16%）was studied by means of polarization microscope. The results indicate that the microstructure of blast furnace slag is mainly porphyritic or porphyritic-like texture. Phenocryst minerals mainly consist of the rich titanium diopside and melilite,and its matrix is composed by glass,titanaugite,perovskite,and a small amount of metallic iron,titanium nitride,titanium carbide and their solid solution. As the mass percent of TiO2 increases,the content of the rich titanium diopside and titanaugite reduces first and then increases,while the content of the melilite increases first and then decreases. When the mass percent of TiO2 reaches to 12%,the content of titanium nitride,titanium carbide and their solid solution increases. These highmelting point compounds resulted in higher viscosity and melting temperature of blast furnace slag,and the liquidity of blast furnace slag also became worse.
点击查看大图
下载:
