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近年来在国外助滤剂生产中,除了传统的天然无机助滤剂——硅藻土外,珍珠岩助滤剂也得到了普遍应用。珍珠岩助滤剂具有较好的过滤性能,较小的容重(60—115kg/m~3),较低的可溶性,孔隙量大(其中等孔隙直径为10μm 左右,硅藻土为7μm),过滤中流率高,密度可调节(通过加热膨胀)以及滤饼密度小等特点。一、用膨胀珍珠岩制取不同性能的过滤材料1.抗磨性过滤材料美国用珍珠岩加
In recent years, foreign filter aid production, in addition to the traditional natural inorganic filter aid - diatomaceous earth, perlite filter aid has also been widely used. Perlite filter aid has good filtration performance, smaller bulk density (60-115kg / m ~ 3), lower solubility, large pore volume (about 10μm pore diameter, 7μm diatomaceous earth), Filtration flow rate is high, the density can be adjusted (by heating expansion) and the filter cake density and so on. First, the use of expanded perlite Preparation of different properties of the filter material 1 wear-resistant filter material The United States with perlite plus