摘要
白泥是粉煤灰“一步酸溶法”提取氧化铝后产生的高硅尾渣,由于其具有颗粒小、活性高、二氧化硅含量高和其它杂质含量少的优点,是制备硅基材料的优质原料。文章研究了硫酸法去除白泥中的氧化铝时,焙烧工艺及溶出工艺条件对其影响。结果表明,焙烧温度320℃,焙烧时间120 min,焙烧酸泥质量比为0.9,溶出温度150℃,溶出时间120 min,溶出酸泥质量比为3,酸浓度5%时,白泥中铝元素去除率达95.6%,二氧化硅提取率达到90%,且获得的样品白炭黑中硅含量达到90%。
White mud is the high silicon residue after“one-step acid dissolution”of fly ash.Due to its small particles,high activity,high SiO2 content and low impurity content,white mud is a better raw material to prepare silica-based materials.The roasting and leaching behavior of Al2O3 from white mud in sulphuric acid method was investigated in this paper.The results showed that the removal rate of Al2O3 can be more than 95.6% and the extraction rate of SiO2 can be more than 90% in white mud,when the roasting temperature is 320℃,the roasting time is 120min,the ratio of acid and white mud is 0.9,the leaching-temperature is 150℃,the leaching time is 120 min,the liquid-solid ratio is 3 and the concentration of sulfated acid is 5%.Besides,the silicon content of white carbon black products is 90%.
作者
杜艳霞
Du Yanxia(Shenhua Zhunneng Resources Comprehensive Development Company Limited,Erdos,Inner Mongolia Autonomous Region,China)
出处
《矿产综合利用》
CAS
北大核心
2020年第2期156-160,共5页
Multipurpose Utilization of Mineral Resources
基金
国家科技部“十二五”科技支撑计划项目(2011BAA04B05)。
关键词
白泥
硫酸法
除氧化铝
白炭黑
White mud
Sulfuric acid method
Removal of aluminium oxide
White carbon black
