Sand without epoxy

Discussion on sand removal from sandy crude and purification of oily sand in offshore viscous oilfield;

海上稠油油田含砂原油除砂及含油砂净化工艺探讨

The calculating method of fineness of molding sand was recommende

介绍了对有效粘土、碳素物、溶凝质、金属分、石英及水分的型砂组分分析方法 ,并推荐了型砂纯净度的计算方法。