摘要
在超声波场下,对铝酸钠溶液中硅、铁杂质的脱除进行研究,在研究过程中分别考察了温度、超声波强度、反应时间、氧化钙及铝酸钙的用量等因素对铝酸钠溶液中硅、铁脱除效果的影响。结果表明,在温度80℃,CaO加入量为5g·L-1,3CaO·Al2O3·6H2O的加入量为4g·L-1,反应时间2.0h,超声波强度20W·cm-2条件下,硅、铁脱除率分别达到99.78%,99.54%,硅量指数可达11000。相比没有超声波的条件下,硅、铁脱除率分别提高了14.58%,21.04%。对获得的硅铁渣进行了XRD及SEM分析,结果表明,脱杂形成的硅铁渣分子排例紧密,结构稳定。这说明用CaO+3CaO·Al2O3·6H2O作混合脱杂剂,并在超声波条件下在铝酸钠溶液中脱除硅、铁是可行的。
The technology of Si and Fe being removed from sodium aluminate solution under ultrasonic field through putting the mixture of CaO and 3CaO·Al2O3·6H2O into the solution was investigated in the paper. The experimental results showed that the removal rate of Si and Fe were respectively up to 99. 78% and 99. 54% while temperature,ultrasonic intensity,reaction time and the consumption of 3CaO·Al2O3·6H2O were set respectively as80℃,20W·cm^-2,2. 0h,5g·L^-1 and 4g·L^-1,and the removal rate of Si and Fe were enhanced as14.58% and21.04% respectively under the ultrasonic field. The SEM pictures of slag that was formatted in the process of Si and Fe being removed showed that the slag molecules were closely arranged to chains and the structure of the chains was stable and uniformly distributed,which showed the technology of Si and Fe being removed under the ultrasonic field through using the removal mixture agent of CaO and 3CaO·Al2O3·6H2O was feasible.
出处
《轻金属》
CSCD
北大核心
2014年第8期17-22,共6页
Light Metals
关键词
超声波场
铝酸钠溶液
硅
铁
脱除
ultrasonic field
sodium aluminate solution
Si
Fe
removing
