广东某高岭土矿综合利用试验研究  

Experimental Study on Comprehensive Utilization of Kaolin Ore in Guangdong

作　　者：尚兴科 付广钦 关通 周晓彤 SHANG Xingke;FU Guangqin;GUAN Tong;ZHOU Xiaotong(Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,Guangdong,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,Guangdong,China;Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources,Guangzhou 510650,Guangdong,China)

机构地区：[1]广东省科学院资源利用与稀土开发研究所,广东广州510650 [2]稀有金属分离与综合利用国家重点实验室,广东广州510650 [3]广东省矿产资源开发与综合利用重点实验室,广东广州510650

出　　处：《矿冶工程》2024年第2期56-59,共4页Mining and Metallurgical Engineering

基　　金：广东省科学院发展专项资金项目(2021GDASYL-20210302004,2022GDASZH-2022010104)。

摘　　要：广东某高岭土矿中铁赋存状态较复杂,部分铁以类质同象方式存在于高岭石、伊利石等矿物晶格中无法去除,造成高岭土精矿烧成白度较自然白度低。为了高效开发利用该高岭土矿,开发了捣浆-螺旋分级机分级-旋流器分级工艺,可获得Al_(2)O_(3)品位30.02%、回收率61.70%的高岭土精矿,其中杂质Fe_(2)O_(3)含量为1.15%,达到陶瓷工业用高岭土三级品标准;分级尾砂经磨矿-磁选-旋流器分级工艺,可获得SiO_(2)含量97.11%、Fe_(2)O_(3)含量0.058%的石英砂精矿和K_2O含量7.07%、Al_(2)O_(3)含量31.22%、SiO_(2)含量48.32%、自然白度65.53%的绢云母精矿;石英砂精矿达到玻璃工业用低档石英砂质量标准;绢云母精矿可用于涂料行业;磁选尾矿产率8.41%、SiO_(2)含量76.33%,可用作建筑用砂辅料。该工艺实现了不同矿物的有效分离,达到高岭土矿综合利用的目的。The occurrence state of iron minerals in a kind of kaolin ore in Guangdong is relatively complex.A portion of iron minerals is irremovable as they disseminate in the lattice of kaolinite,illite and other minerals in an isomorphic manner.For this reason,the calcined kaolin concentrate possesses a lower whiteness than the natural whiteness.In order to efficiently exploit and utilize the kaolin ore,a process consisting of slurry tamping,spiral classifier classification and hydrocyclone classification was adopted,resulting in a kaolin concentrate grading 30.02%Al_(2)O_(3) at 61.70%recovery with the content of impurity Fe_(2)O_(3) at 1.15%,which can reach grade III standard of kaolin for ceramic industry.The classification downflow was then subjected to a process consisting of grinding,magnetic separation and hydrocyclone classification,resulting in a quartz sand concentrate and a sericite concentrate.The quartz sand concentrate,containing 97.11%SiO_(2) and 0.058%Fe_(2)O_(3),can satisfy the standard for low quality quartz for glass industry,and the sericite concentrate,containing 7.07%K2O,31.22%Al_(2)O_(3) and 48.32%SiO_(2),with natural whiteness at 65.53%,can be used in the coating industry.The magnetic separation results in the tailings with a yield of 8.41%and SiO_(2) content of 76.33%,which can be used as auxiliary materials for building sand.Through this process,different minerals can be effectively separated to achieve the purpose of comprehensive utilization of kaolin ore.

关 键 词：高岭土 绢云母 石英砂 分级 白度 综合利用 

分 类 号：TD985[矿业工程—选矿]