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应用X射线衍射仪、偏光显微镜和扫描电镜对水淬和空冷低钛高炉渣的矿相组成、显微结构、Ti O_2分布规律及其差异性进行研究.结果表明:水淬渣和空冷渣中主要矿物组成均为玻璃质、钙钛矿、钙铝黄长石和镁硅钙石,但是两种炉渣中各矿物组分含量相差较大,空冷渣中钙铝黄长石和钙钛矿的平均体积分数分别为62.5%和12.5%,是水淬渣中钙铝黄长石和钙钛矿的2.27倍和1.92倍,而玻璃质的平均体积分数不足水淬渣的1/3.水淬渣和空冷渣中矿相显微结构差异较大,空冷渣中钙铝黄长石为钉齿状,而水淬渣中钙铝黄长石为呈羽毛状和针状,且结晶粒度较小,钙钛矿在水淬渣和空冷渣中分别呈星点状和树枝状分布,两种炉渣中镁硅钙石都为纺锤体形;水淬渣中Ti O_2主要分布在钙钛矿、玻璃质和钙铝黄长石中,而空冷渣中Ti O_2主要分布在钙钛矿和钙铝黄长石中,并且空冷渣中钙钛矿Ti O_2的分布率比水淬渣高8.41%,空冷方式更有利于将Ti O_2聚集在钙钛矿中.
The phase composition, microstructure and Ti O 2 distribution of water-quenched and air-cooled low-titanium blast furnace slag were studied by X-ray diffraction, polarized light microscopy and scanning electron microscopy. The results showed that the water quenched slag and air-cooled slag The main mineral components are vitreous, perovskite, calcium-aluminum feldspar and magnesite calcium stone, but the two kinds of slag in the mineral content of the difference between the larger, air-cooled slag in the average volume of calcium and aluminum feldspar and perovskite The scores were 62.5% and 12.5%, respectively, 2.27 times and 1.92 times that of calcium-aluminum-yellow feldspar and perovskite in the water-quenched slag, while the average glassy fraction was less than 1/3 of the water-quenched slag. In the slag, the microstructure of the mineral phase is quite different. The calcium-aluminum-yellow feldspar is spiraled-tooth in the air-cooled slag. The calcium-aluminum-yellow feldspar in the water-cooled slag is feathery and needle-shaped with smaller grain size. Slag and air-cooled slag were star-shaped and dendritic distribution, both of the slag magnesium silicate stone spindle shape; water quenched slag Ti O_2 are mainly distributed in perovskite, vitreous and calcium-aluminum-yellow feldspar, and Air-cooled slag Ti O 2 is mainly distributed in perovskite and calcium-aluminum-feldspar, and air-cooled slag perovskite The distribution rate of Ti O 2 is 8.41% higher than that of water-quenched slag. The air-cooling method is more conducive to the accumulation of Ti O 2 in perovskite.