蛋白土硫酸铵煅烧增白工艺研究  

Research of Whitening Process of Opoka by Ammonium Sulfate Calcination

作　　者：刘阳钰 李铭哲 孙志明[1] 郑水林[1] 潘永泰[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《非金属矿》2018年第1期8-10,共3页Non-Metallic Mines

摘　　要：以黑龙江嫩江地区某低品位蛋白土原矿为原料,采用硫酸铵煅烧法,研究了不同煅烧条件对其增白效果的影响,并对样品的白度、化学成分、矿物成分及颗粒的形貌进行了表征。结果表明,煅烧温度500℃、硫酸铵添加量为蛋白土质量的200%、煅烧时间1 h、升温速度5℃/min,能有效去除蛋白土中的主要染色金属杂质氧化铁,去除率达到96%以上,经过增白处理的蛋白土白度从原矿的22.1%提高到86.5%,SiO_2含量从73.18%提高到88.79%。Take the low grade opoka which was obtained from Nenjiang county, Heilongjiang province as the raw material, and the ammonium sulfate calcination method was used to whiten the opoka. The effect of different calcination conditions on the whiteness of opoka and the characteristics of samples including whiteness, chemical component, mineral composition, particle morphology were studied. The results showed that, the calcination temperature at 500 ℃, ammonium sulfate ammount was 200% of the opoka quality, retaining time was 1.0 h and heating rate was 5 ℃/min, the ammonium sulfate calcination could effectively remove the main dyeing metal impurity iron oxide in the opoka, and the removal rate is over 96%, the whiteness of opoka increased from 22.1% to 86.5%, and the SiO2 content of opoka was improved from 73.18% to 88.79%.

关 键 词：蛋白土 增白 煅烧 硫酸铵 

分 类 号：TF046.2[冶金工程—冶金物理化学]