摘要
以山西孝义铝土矿为原料,破碎、细磨至≤0.088mm后,在不同温度(900、950、1000、1050℃)保温不同保温时间(30、60、90、120、180min)进行煅烧,煅烧产物与150g.L-1的NaOH溶液按质量比1:10混合,搅拌2h后,过滤、洗涤、110℃烘干,然后检测产物中Al2O3和SiO2的含量,以研究煅烧条件对碱溶脱硅效果的影响。结果表明:碱溶脱硅的最佳煅烧条件为1000℃保温90min;碱溶脱硅后,Al2O3的质量分数从原矿的78.18%增加到83.66%,铝硅质量比从原矿的5.68增加到11.65。
Bauxite from Xiaoyi City in Shanxi Province was taken as raw material,crushed and ground to ≤0.088 mm,calcined at 900,950,1 000 and 1 050 ℃ for 30,60,90,120 and 180 min,respectively,then put into NaOH solution of 150 g·L-1（calcined products ：NaOH solution=1：10 in mass）,mixed and stirred for 2 h,filtrated and washed,and finally dried at 110 ℃.Al2O3 and SiO2 contents of the final product were tested to study the calcining influence on desilication.The results show that the best calcination condition is at 1 000 ℃ for 90 min;after desilication,alumina mass percent increases from 78.18% to 83.66% and Al2O3/SiO2 mass ratio increases from 5.68 to 11.65.
出处
《耐火材料》
CAS
北大核心
2010年第2期137-139,共3页
Refractories
关键词
铝土矿
煅烧
碱溶
脱硅
Bauxite
Calcination
Alkali dissolved
Desilication
