摘要
以含Mg2+和Al3+等有价元素的高炉渣酸解提硅废液为原料、尿素为沉淀剂,采用均匀沉淀法制备镁铝尖晶石粉体,研究了其产率及性能.结果表明,最佳工艺条件为:反应温度100℃,尿素用量为理论用量的10倍,煅烧温度1100℃,保温时间2 h.加入5%(w)Na2S2O4后,样品中Fe2O3含量从1.70%(w)降到0.49%(w),除铁率达71.2%,白度增加11度.产品为富铝型镁铝尖晶石,且杂质含量远低于国家标准.
Magnesium aluminum spinel powder was prepared by homogeneous precipitation method with acid-leaching solution of blast furnace slag containing Mg2＋, A13＋ and other valuable components as raw material, and urea as precipitant. According to precursor productivity and properties of magnesium aluminum spinel, the optimal technological conditions were obtained： reaction temperature 100℃, urea dosage 10 times of theoretical dosage, calcination temperature 1100℃ and isothermal treatment time 2 h. After addition of 5%（ω） Na2S204, the content of Fe203 was decreased from 1.70%（ω） to 0.49%（ω）, iron removal rate reached 71.2%, and the whiteness increased 11 degrees. The magnesium aluminum spinel particles were flower and needle-like in shape. The prepared product belonged to alumina-rich spinel series, the content of impurities in the product was below the level of national standard. Key words： magnesium aluminate spinel; precipitation; urea; blast furnace slag; waste solution
出处
《过程工程学报》
CAS
CSCD
北大核心
2014年第1期157-161,共5页
The Chinese Journal of Process Engineering
基金
安徽省自然科学基金资助项目(编号:1208085QB30)
安徽省高等学校省级自然科学研究项目(编号:KJ2012A041)
关键词
镁铝尖晶石
沉淀
尿素
高炉渣
废液
magnesium aluminate spinel
precipitation
urea
blast furnace slag
waste solution
