煅烧温度对高岭土性质的影响  

Influence of calcination temperature on nature of kaolinite

作　　者：杨泽清 王伟 张凌燕[2] 管俊芳[2] 邱杨率[2] 田钊[2] 曹刚[2] 

机构地区：[1]湖北柳树沟矿业股份有限公司,湖北宜昌443145 [2]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《武汉工程大学学报》2013年第7期66-69,共4页Journal of Wuhan Institute of Technology

摘　　要：对湖北某地红岩崖的块状沉积型高岭土矿石进行化学成分分析、物相分析以及热重分析,原矿中高岭石含量达90%以上.探索了煅烧温度对产品白度、pH值的影响,结果显示最佳的煅烧温度区间为875～950℃,煅烧后产品白度≥80%,100g/L的高岭土产品悬浊液pH≤7,产品高岭土组分为偏高岭石.根据实验结果设定950℃的煅烧温度在某有限公司生产线进行了连续7天稳定生产的工业试验,得到白度为(82±1)、pH值为(6.20±0.2),质量稳定且符合国家工业标准的产品.Chemical composition analysis,phase analysis,and thermal gravimetric analysis were used to determine the basic nature of the massive sedimentary kaolinite in red rock cliff in Hubei province;the content of kaolinite in the crude ore is over 90%.The influence of calcination temperature on the whiteness,pH value of the product was explored.The results show that the optimum range of calcination temperatures is between 875 ℃ and 950 ℃,the whiteness of the product is greater than or equal to 80%,the pH of 100 g/L suspension of the product is less than 7.The calcination temperature was set at 950 ℃ based on the experimental results,continuous industrial test of stable production for 7 days was made in a special flour limited production line and the product was gained with whiteness（82 ± 1）,pH（6.20 ± 0.2）.The quality of product is stable,which meets the national industrial standard.

关 键 词：高岭土 煅烧温度 白度 

分 类 号：TD985[矿业工程—选矿]