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采用浸渍法,以Al(H2PO4)3,Al(H2PO4)3 H3PO4和H3PO4三种溶液为浸渍剂,对镁钙熟料进行表面处理,研究其抗水化性能的变化规律。结果表明,采用Al(H2PO4)3溶液取代或部分取代H3PO4溶液,控制合适的浸渍浓度、反应温度和热处理温度,因在镁钙熟料表面形成了以难溶或不溶于水的Ca2P2O7、Ca3(PO4)2、Al(PO3)3、AlPO4为主的保护膜,同时因为钙和铝的磷酸盐相互交叉构成网络结构,改善了膜的强度及对熟料颗粒表面的粘结性,从而获得优于H3PO4溶液处理的抗水化效果;处理后的镁钙熟料水化增重率和粉化率:Al(H2PO4)3 H3PO4溶液分别为0.35%和2.8%,Al(H2PO4)3溶液分别为0.54%和3.45%,而H3PO4溶液分别为0.41%和5.1%。
The impregnation method with Al (H2PO4) 3, Al (H2PO4) 3 H3PO4 and H3PO4 as impregnant, surface treatment of Mg-Ca clinker to study the variation of the anti-hydration properties. The results show that Al (H2PO4) 3 solution can replace or partially replace H3PO4 solution to control the proper impregnation concentration, reaction temperature and heat treatment temperature. Because Ca2P2O7 and Ca3 PO4) 2, Al (PO3) 3 and AlPO4, and at the same time, the network structure of the calcium and aluminum phosphates cross each other to improve the strength of the film and the adhesion to the surface of the clinker particles, thereby obtaining the excellent The hydration weight gain rate and the pulverization rate of the treated Mg-Ca clinker were 0.35% and 2.8% for the Al (H 2 PO 4) 3 H 3 PO 4 solution respectively, while the solutions for the Al (H 2 PO 4) 3 solution were 0.54% and 3.45% respectively, while the H3PO4 solutions were 0.41% and 5.1% respectively.