聚合物对原硅酸钙分解行为的影响  

Effect of polymer on decomposition of calcium silicate

作　　者：董凯伟[1] 姜晓杰[1] 张爽[1] 潘晓林[1] 于海燕[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819

出　　处：《材料与冶金学报》2013年第3期185-188,共4页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(50974036;51174054)

摘　　要：针对碱石灰烧结法中的二次反应,以分析纯化学试剂为原料,研究了不同的聚合物对原硅酸钙在铝酸钠溶液中分解行为的影响,并通过XRF、XRD和IR等手段探讨了其作用机理.结果表明:聚丙烯酸钠(PAAS)和聚乙二醇(PEG)能够抑制β-2CaO·SiO2在铝酸钠溶液中的分解,降低溶液中SiO2浓度;PAAS和PAAS与PEG的1∶1混合物对β-2CaO·SiO2分解的抑制效果优于PEG;聚合物通过抑制钙硅渣的生成来减少β-2CaO·SiO2的分解;PEG是在β-2CaO·SiO2/铝酸钠溶液界面通过物理吸附抑制β-2CaO·SiO2的分解,而PAAS靠化学吸附抑制β-2CaO·SiO2的分解.Considering the side-effects of the alkali lime sintering process,effects of different polymers on decomposition of the calcium silicate in a sodium aluminate solution were studied taken analytically pure reagents as materials.Mechanisms of the action were explored by XRF,XRD and IR methods.The results indicated that sodium polyacrylate(PAAS) and polyethylene glycol(PEG) can restrain β-2CaO·SiO2 from decomposition and reduce SiO2 concentration in the filtrate.PAAS and the mixture of PAAS and PEG(1 ∶ 1) are better than PEG in the restraining effect.The ploymers prevent from formation of calcium silica slag to retrain decomposition of β-2CaO·SiO2.Effect of PEG comes through physisorption while PAAS achieves by chemisorption.

关 键 词：原硅酸钙 聚合物 铝酸钠溶液 二氧化硅 钙硅渣 

分 类 号：TQ133.1[化学工程—无机化工]