【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.更多还原

【Abstract】 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.更多还原