含钛高炉渣制备无机高分子复合絮凝剂及其性能研究

Preparation of inorganic polymeric flocculant from titanium-containing blast furnace slag and its properties

用盐酸溶解含钛高炉渣,将溶出液与聚硅酸按不同配比复合预聚,制得无机高分子复合絮凝剂MSF,对MSF的形貌和红外光谱进行分析;采用MSF处理模拟江水,对所形成絮体的粒径分布以及MSF的絮凝效果进行比较,并研究不同原水水质和pH值对MSF絮凝效果的影响。结果表明,按n(M)∶n(Si)为1∶2的配比所制MSF呈现为有较高伸展度、较粗枝杈的长链分枝形貌,形成的絮体粒径最大,对模拟江水的絮凝效果最好;在pH值为1.5～12.5时,絮体表面均呈现很强的正电性;MSF对原水水质和pH值的变化有较强的适应性。

The inorganic polymeric composite flocculant MSF was prepared with polysilicic acid and a solution generated from titanium-containing blast furnace slag dissolved with hydrochloric acid. The images and infrared spectrums of different ratios of MSF were studied. With MSF used as the coagu- lant to treat synthetic river water., the size distribution of flcos and the coagulation efficiency of MSF were analyzed, and the effects of water quality and pH on the coagulation efficiency were investigated, respectively. The results show that when n（M） ＂ n（Si） is 1 ＂ 2, MSF has higher stretch degrees, lar- ger branches, the biggest particle size of flocs, and the best coagulation performance. When the pH varies from 1.5 to 12.5, the surface of flocs exhibits higher positive charge. It is also found that MSF has high adaptability to water quality and pH.