北海某高岭土尾矿中石英砂的选矿提纯试验

Separation Experiment of Kaolin Tailing Quartz Sand in Guangxi Beihai

广西北海某高岭土尾矿的矿物成分95%以上为石英。为了给该尾矿的高附加值利用提供依据,在工艺矿物学研究基础上,按照擦洗—分级—棒磨—分级—高梯度强磁选—反浮选—酸擦洗原则流程对其进行石英砂提纯的选矿试验,获得了粒度为0.6～0.1 mm、SiO2含量达到99.91%、Fe2O3含量为79.88μg/g的高白石英砂产品,并结合选矿试验和工艺矿物学研究结果,针对将来的实际生产提出了不仅可产出高白石英砂,还可获得陶瓷原料、普通石英砂、高岭土等副产品的推荐工艺流程。

More than 95% of minerals in a Beihai kaolin tailing in Guangxi is quartz.In order to provide the basis for improving high added value of tailings,and based on the process mineralogy research,beneficiation tests for purification of quarts sands are carried out by the process of scrubbing-classification-rod mill-grading-high gradient high intensity magnetic separation-reverse flotation-acid scrubbing.Through this process,high whithness quartz sands with the particle size of 0.6～0.1 mm,SiO2 content of up to 99.91%,Fe2O3 content of 79.88 μg/g were gained.Combining with the benefinicaiton tests and the process mineralogy research,the process of both producing high-whithness quartz sand and the byproducts of ceramic materials,ordinary quartz sand,kaolin and others is recommanded for the actual production in future.