粉煤灰提取氧化铝过程中镓的分析方法研究

Research on analyzing method of gallium during extracting alumina from fly ash

用粉煤灰生产氧化铝的过程中,固体物料伴生的金属镓随着铝的溶出而一起进入铝酸钠溶液中,在生产流程中循环并富集在循环母液中,对今后金属镓的提取有着重要意义。为了对生产中不同固体物料和铝酸钠溶液中的镓进行分析,采用丁基罗丹明B为显色剂,甲苯为萃取剂,用分光光度法测试,进行了各种测试条件的实验。金属镓浓度在2.0～10.0μg/10mL范围内呈良好的线性关系,回收率为95.0%～104.5%。该方法具有灵敏度和结果准确度高,操作简便。经样品测试,结果满意。

Gallium accompanying fly ash has been found that dissolve in sodium aluminate solution in the process of A1203 extracting from fly ash, and it is enriched in the recycling liquor, it is very important to the extracting of gallium. In order to determine gallium in different solid material and solution of sodium aluminate, the spectrophotometer is used, rhodamine B as ehromogenic agent, methylhenzene as extractant. The liner calibration range is tested to be from 2.0μg/10mL- 10.0μg/10mL,and the recovery yield reach 95.0% -104.5%. This method is proved that it has high sensitivity and accuracy and the result is satisfactory.