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本发明述及有关矿物的精选,特别是涉及从如粘土矿物和碱土金属原矿中分离出其中伴生的大部分杂质的方法。原矿中存在着各种杂质,由于种种原因,这些杂质在最终产品中有害。例如,云母、电气石、二氧化钛通常和高岭石质粘土矿物共生,而且在它们的晶格中常含有铁原子或与它们伴生的铁质化合物,因此,当存在这些杂质时,高岭土的白度降低而呈深色。高岭石质矿物也可能含有石英和长石,这些矿物相对较硬。当含有这些矿物的高岭土用作纸张的填料和涂料时,具有磨损性,造成造纸和印刷机械的磨损;高岭石质粘土矿物也含有如蒙脱石等矿物,在水中,这些矿
The present invention relates to the beneficiation of minerals and in particular to a method of separating most of the impurities associated therewith, such as from clay minerals and alkaline earth ores. There are various impurities in the raw ore, which for various reasons are harmful in the final product. For example, mica, tourmaline, titanium dioxide are often intergrown with kaolinitic clay minerals and often contain iron atoms or their associated iron compounds in their crystal lattice so that when these impurities are present, the whiteness of the kaolin is reduced And dark. Kaolinite minerals may also contain quartz and feldspar, which are relatively hard minerals. When used as fillers and coatings for paper, kaolin containing these minerals is abrasive and causes wear on paper and printing machines; kaolin clay minerals also contain minerals such as montmorillonite, which in the water