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在Factsage热力学计算基础上,借助高温共聚焦显微镜进行了二元碱度对含钛高炉渣结晶行为影响的研究。热力学计算表明:在低碱度的含钛渣中,钛组分以TiO_2的形式富集,TiO_2的结晶温度约为1 160℃;高碱度时富集于钙钛矿。CSLM实验结果表明:炉渣碱度对钛组分的富集路径有影响。当1 100℃等温冷却,碱度为0.6时,二氧化钛富集于钛铈钙矿,该物相晶体呈现细小的针状,不利于后续的分离处理;当碱度为0.8时,二氧化钛富集于扁平的榍石中,该物相平均尺寸为径长250μm,但是抛磨后成不规则条状,晶体尺寸仍然很小,与其他物相共生。
On the basis of factsage thermodynamic calculation, the influence of binary basicity on the crystallization behavior of titanium-containing blast furnace slag was investigated by high-temperature confocal microscope. The thermodynamic calculations show that the titanium component is enriched in the form of TiO 2 in the low alkalinity titaniferous slag, the crystallization temperature of TiO 2 is about 1 160 ℃, and enriched in perovskite at high alkalinity. The experimental results of CSLM show that the basicity of slag affects the enrichment path of titanium components. When isothermally cooled at 1 100 ℃ and the alkalinity is 0.6, the titanium dioxide is enriched in the cericocasium ore, and the crystal phase of the titania exhibits fine acicular shape, which is not conducive to the subsequent separation treatment. When the basicity is 0.8, the titanium dioxide is enriched in Flat rock, the average size of the object path length 250μm, but polish into an irregular strip, the crystal size is still small, and other objects coexist.