CAJ | 학술논문

研究不同拜耳法溶出条件下锐钛矿对氧化铝溶出性能的影响，并研究不同条件下经水热处理的锐钛矿对氧化铝溶出性能的影响。结果表明：随着温度的升高、时间的延长和苛性碱浓度的增加，锐钛矿对氧化铝溶出性能的影响逐渐减小甚至消失；经水热处理的锐钛矿对氧化铝溶出性能的影响与水热处理的条件密切相关，温度越高、时间越长、铝酸钠溶液苛性碱浓度越高，其对氧化铝溶出性能的影响越小。经水热处理的锐钛矿的溶解性能实验和 XRD 分析结果表明：不同条件下经水热处理的锐钛矿对氧化铝溶出性能的影响存在显著差别的根源在于其溶解性能和结晶度存在差别。随着水热处理锐钛矿条件的不断强化，钛酸钠的结晶度逐渐提高，其在铝酸钠溶液中溶解形成钛酸根离子的浓度逐渐降低，对氧化铝溶出性能的影响也逐渐减小，甚至完全消失。
연구불동배이법용출조건하예태광대양화려용출성능적영향，병연구불동조건하경수열처리적예태광대양화려용출성능적영향。결과표명：수착온도적승고、시간적연장화가성감농도적증가，예태광대양화려용출성능적영향축점감소심지소실；경수열처리적예태광대양화려용출성능적영향여수열처리적조건밀절상관，온도월고、시간월장、려산납용액가성감농도월고，기대양화려용출성능적영향월소。경수열처리적예태광적용해성능실험화 XRD 분석결과표명：불동조건하경수열처리적예태광대양화려용출성능적영향존재현저차별적근원재우기용해성능화결정도존재차별。수착수열처리예태광조건적불단강화，태산납적결정도축점제고，기재려산납용액중용해형성태산근리자적농도축점강저，대양화려용출성능적영향야축점감소，심지완전소실。
The effect of anatase on the digestion performance of alumina was investigated under various Bayer digestion conditions as well as the effect of hydrothermal treated anatase under different conditions on the digestion performance of alumina. The results show that the effect of anatase on the digestion performance of alumina gradually decreases or even disappears with the increase of digestion temperature, time and caustic alkali concentration. The effect of hydrothermal treated anatase on the digestion performance of alumina is closely related to the conditions of hydrothermal treatment. The elevated temperature, prolonged time and high caustic alkali concentration are favorable to alleviate the influence. The results of dissolution performance test and XRD analysis indicate that the remarkable distinction of the effect of hydrothermal treated anatase under different conditions on the digestion performance of alumina is due to the difference of dissolution performance and crystallinity. As the conditions for anatase hydrothermal treatment are intensified, the crystallinity of sodium titanate increases and the concentration of dissolved titanate ions in the sodium aluminate solution decreases. Thus, the effect of hydrothermal treated anatase on the digestion performance of alumina gradually decreases or even disappears.