“干簸法”是分离提纯黑云母的主要辅助方法。实践证明:它配合电选、浮选、漂淘或形态分离等方法可获得做为单矿物化学分析和年令测定的样品,是行之有效和值得推荐的方法。现将本人多年来积累的经验介绍如下:根据花岗岩的结构和黑云母最佳单体解离度等特征,在样品加工破碎时,一般选用30和80网目两个筛号套起来使用。逐次破碎和选用30～80网目之间部分,用不同淘洗盘簸出黑云母,剩余部分再加工破碎,并把簸出的黑云母集中起来。然后再用船形淘砂盘, “Dry-sand method” is the main auxiliary method for separation and purification of biotite. Practice has proved that: it with the election, flotation, drift drift or form separation methods available as a single mineral chemical analysis and the determination of samples, is an effective and recommended method. Now I have accumulated experience over the years are introduced as follows: According to the granite structure and biotite best monomer dissociation and other characteristics of the sample processing crushing, the general use of 30 and 80 mesh sieve two sets together to use. Crushing and selection of 30 to 80 mesh between the part of the pan with a different panning out of the black mica, the remaining part of the processing and crushing, and the boil out of the biotite together. Then use the boat Amoy disc,