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对云南双江低品位硅藻土采用原土→捣浆→分散→－沉降分级的方法，可获含ＳｉＯ２８２．２４％的硅藻精土，Ａｌ２Ｏ３，Ｆｅ２Ｏ３含量分别为６．９８％和１．０４％；同时还获ＳｉＯ２，Ａｌ２Ｏ３，Ｆｅ２Ｏ３分别为７６．１８％，１０．１０％，１．４６％的硅藻中土；精土和中土产量分别为３．２９％和１４．５６％．精土经酸浸精选，ＳｉＯ２含量提高至８４．３６％，Ａｌ２Ｏ３，Ｆｅ２Ｏ３分别为７．５３％和０．８０％；中土经酸浸→焙烧，ＳｉＯ２，Ａｌ２Ｏ３，Ｆｅ２Ｏ３含量分别为８３．９２％，１１．３２％，１．１０％．２种产品ＳｉＯ２均大于８０％，可满足生产硅藻土助滤剂的要求．
The diatomite with SiO2 content of2.24% can be obtained by using the method of original soil → pulping → dispersion → sedimentation classification on the low grade diatomite in Shuangjiang of Yunnan Province. The contents of Al2O3 and Fe2O3 are respectively 6.98% and 1. 04%; also get SiO2, Al2O3, Fe2O3 were 76.18%, 10.10%, 1.46% of diatom soil; fine soil and soil yield were 3.29% and 14.56% . The contents of SiO2, Al2O3 and Fe2O3 were 7.53% and 0.80% respectively. The contents of SiO2, Al2O3, Fe2O3 were 83% for medium earth after acid leaching and roasting. 92%, 11.32%, 1.10%. Two products are more than 80% SiO2, to meet the production of diatomaceous earth filter aid requirements.