粒化高炉矿渣的水化机理探讨  

Study on mechanism of hydration of granulated blast furnace slag

作　　者：潘庆林[1] 

机构地区：[1]北京航空航天大学土木工程系,北京100083

出　　处：《水泥》2004年第9期6-10,共5页Cement

摘　　要：以上海梅山钢铁公司的矿渣为研究对象,探讨粒化高炉矿渣在无激发剂存在的条件下的水化机理,并建立矿渣水化反应过程的化学模型。为矿渣的大规模、无害化、资源化和高附加值利用奠定理论基础。研究表明:在没有化学激发剂存在的条件下,梅山矿渣的水化产物是水化硅酸钙C2SH(C)、水化硅酸钙2CaO·SiO·(2￣4)HO和钙铝黄长石22Ca2Al(Al,Si)2O7。初期的水化过程是矿渣中的Ca2+等网络改变体阳离子与水中的H之间的置换,随着这种置换反应的进+行,溶液中的pH值不断升高,当pH高到一定程度时,矿渣颗粒表面上的HSiO4的溶解度将提高,溶解了的各种形态4的硅酸离子和溶液中的Ca2+、OH反应生成水化硅酸钙凝胶。Ground granulated blast furnace slag of Shanghai Meishan Steel company was studied excluding any other activators, and the model of chemical reaction of hydration was established. The results lay theoretic foundations for people t o use furnace slag largely and environmentally as resources to make products wit h high additional value. The results showed that without chemical activators, hy dration products of Meishan slag are C2SH(C), 2CaO·SiO2·(2-4)H2O and Ca2Al(Al, Si)2O7. At the early stage, the H+ ion replaced Ca2+ and other complex cations, then pH value of the solution increased progressively, after it reached a critic al value the solubility of H4SiO4 which was attached on the surface of slag part icles increase dramatically, and combined with Ca2+, OH-ions to form C-S-H gel.

关 键 词：水化机理 粒化高炉矿渣 化学激发 水化硅酸钙 颗粒表面 水化反应 水化过程 水化产物 激发剂 置换 

分 类 号：TQ172[化学工程—水泥工业] TU522[化学工程—硅酸盐工业]