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采用偏光显微镜对不同TiO_2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TiO_2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TiO_2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。
The phase structure of blast furnace slag with different TiO 2 content (7% ~ 16%) was systematically studied by polarization microscope. The results show that the microstructure of the slag is platy and platy. The plagiocrystalline minerals are mainly barite and feldspar. The matrix is vitreous, fine titaniferous, perovskite and a small amount of Fe, TiC, TiN and their solid solutions ; With the increase of the amount of TiO_2, the content of BaYiShi and Ti-pyroxene in the slag first decreases and then increases, while the content of the yellow feldspar first increases and then decreases. When the content of TiO_2 exceeds 12%, the content of TiC, TiN and The content of solid solution increases, these high melting point compounds will make the viscosity and melting temperature of the slag increased, resulting in poor flowability of blast furnace slag. The research results can provide an important theoretical basis for improving the flow properties of titanium-bearing blast furnace slag.