富镁低碱度钢渣的托勃莫来石化  

STUDY ON HYDROTHERMAL PROPERTIES OF MgO-RICH AND LOW-AKALINITY STEEL SLAG

作　　者：徐光亮[1] 周歧雄[2] 赖振宇[1] 钱光人[1] 杨世源[1] 

机构地区：[1]西南工学院材料科学与工程系,四川绵阳621002 [2]新疆工学院化学工程系,乌鲁木齐830008

出　　处：《硅酸盐学报》2000年第4期331-334,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金! ( 596 74 0 34 );国家建材局行业基金!(J - 96 - 2 0 )资助项目

摘　　要：研究了富镁低碱度钢渣的托勃莫来石化 .结果表明 :CMS在2 2 0℃可发生水化 ,2 70℃时CMS相已全部消失 ,水热产物为硬硅钙石和少量蛇纹石 .C3 MS2 在水热条件下的反应活性高于CMS ,2 0 0℃可完全水热转化 ,形成富镁的水化硅酸钙矿物 .富镁低碱度钢渣在 1 50℃能发生一定量的托勃莫来石化 ,30 0℃能完全托勃莫来石化且具有较好的胶凝性 .矿物相中的Mg2 +优先固溶于水化硅酸钙中 ,其余的Mg2 +根据水热温度不同而形成Mg(OH) 2 或蛇纹石 .The process of turning Mg_rich and low alkalinity steel slag into tobermorite_like materials was described in this paper. The results show that CMS reacted under hydrothermal conditions at 220 ℃, xonotlite and chrysolite were the final phases at 270 ℃, C 3MS 2 had higher reactivity than CMS under the hydrothermal conditions and could wholly react at 200 ℃, forming Mg_rich calicium silicate hydrates. Mg_rich and low alkalinity steel slag react a little at 150 ℃, it, however, converts into botermorite_like minerals entirely at 300 ℃ with good cementicious properties. In the reaction, Mg 2+ first substitues for other ions in calcium silicate hydrates, then it may form Mg(OH) 2 or chysolite depending on reaction temperature.

关 键 词：富镁低碱度钢渣 托勃莫来石化 原料 水泥 水化 

分 类 号：TQ172.44[化学工程—水泥工业]