摘要
以海南文昌高钛高岭土为原料,采用盐酸酸浸法制取铝盐,进行铝盐中杂质钛的除杂方法研究,优选出PAM除杂法,并采用均匀设计试验法进行PAM除杂的工艺优化研究。结果表明:通过对絮凝体系加热时间、温度、pH值、PAM加入量进行均匀设计试验并对其实验数模进行建立与优化,可使铝盐中钛杂质的除去率达到98.895%;采用该优化工艺所制备的低钛高纯球形α-Al 2O 3,其Ti元素含量低至0.34ppm,杂质总量低至39ppm,金属Ti杂质及总量杂质均优于AO-B级蓝宝石Al 2O 3质量要求。
Taking Hainan Wenchang high titanium kaolin as raw material,the aluminum salt was prepared by the method of hydrochloric acid leaching,as well as the impurity removal method of titanium in above aluminum salt was studied.The optimized PAM method was obtained.Then a study on the optimization of the process conditions for PAM impurity removal was carried out by using the uniform design method.The test was designed for the process with heating time,temperature,pH value and PAM dosage,and the optimization of the experimental digital analog was established.By using the optimized process conditions,98.895%of titanium impurities in the aluminum salt can be removed.Finally,theα-Al 2O 3 with low titanium has been prepared,in which the content of Ti element is as low as 0.34ppm,and the total amount of metal impurities is as low as 39ppm.Thisα-Al 2O 3 with low titanium impurity is superior to“AO-B grade”Al 2O 3 used for sapphire manufacture.
作者
王宗凡
徐树英
李智伟
李家飞
徐凯
张永明
WANG Zongfan;XU Shuying;LI Zhiwei;LI Jiafei;XU Kai;ZHANG Yongming(Hainan Provincial Fine Chemical Engineering Research Center,Hainan University,Haikou 570228,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第9期2864-2869,2876,共7页
Bulletin of the Chinese Ceramic Society
基金
四川省科技支撑计划(15GZ0360)。
关键词
海南高岭土
絮凝除钛
均匀设计法
高纯球形氧化铝
蓝宝石
Hainan kaolin
titanium removal by flocculation
uniform design method
high purity spherical alumina
sapphire
