云南双江低品位硅藻土的选矿工艺

RESEARCH ON MINERAL PROCESSING TECHNOLOGY OF LOW GRADE DIATOMITE OF SHUANGJ IANG, YUNNAN

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．

By using the method of sample-disttlrbing thick liquid-dispersion-subsidence classification to process the low grade diatomite of Shuangiiang, Yunllan the diatomit4 concentratesand middlings which content SiOZ 82.24%, Al,O, 6.9%, FeZO3 l.04% and SiO, 76.18%,Al,O, 10.10%, Fe,O3 l.46%,of which production value are 3.29% and 14.56%, respectivelycan be get. By using the hydrochloric acid to immerse the diatomite concentrates and toclean, SiO, increases to 84.36% and the contents of A12O3 and FeZO3 are 7.53% and 0.80%respectively. By tising the hydrochloric acid to immerse and bake the diatomite middlings, tilecontents of SiO2, Al,O, and FeZO3 are 83.92%, 11.32% and 1.10%, SiO, is lllorethan 80% ill above two samples which underwent the hydrochloric acid immersion orhydrochloric acid immersion and roasting. They meet the need to product diatomite filter aid.