Abstract: KOH sub-molten salt method was studied for preparing potassium titanate whiskers and titanium dioxide by using titaniferous slag as the raw material. The effects of reaction temperature, reaction time, initial KOH concentration and mass ratio of alkali-to-slag on the morphology of the products were investigated. The results show that the reaction temperature, the reaction time and the mass ratio of alkali-to-slag have influences on the morphology of the whiskers. The whiskers obtained have 20~25 mm in length, and 15~20 in length-diameter ratio. Potassium titanate (KTi8O16.5) whiskers can be obtained by calcining the hydrolytic products of potassium titanate (K4Ti3O8), while the pH value of the solution is 10~12. And TiO2 whiskers can be obtained by calcining the hydrolytic products of potassium titanate (K4Ti3O8), while the pH value of the solution is 1~3.

Key words: sub-molten salt method, titaniferous slag, whisker, potassium titanate, titanium dioxide

摘要： 研究了以高钛渣为原料、采用KOH亚熔盐法制备钛酸钾晶须和二氧化钛的新方法，探讨了反应温度、初始KOH浓度、反应时间和碱矿比等因素对钛酸钾晶须形貌的影响. 实验结果表明，反应温度、反应时间和碱矿比对钛酸钾晶须的形貌影响较为显著，并得到长度约20~25 mm、长径比约为15~20的钛酸钾晶须. 钛酸钾在pH=10~12间水解并煅烧，制备了八钛酸钾晶须；在pH=1~3间水解并煅烧，制备了二氧化钛晶须.

关键词: 亚熔盐法, 高钛渣, 晶须, 钛酸钾, 二氧化钛