铬铁渣煅烧绿色水泥的机理  

MECHANISM OF GREEN CEMENT CALCINATION FROM FERROCHROMIC SLAG

作　　者：刘小波[1] 肖秋国[1] 付勇坚[1] 赵红钢[1] 

机构地区：[1]湘潭工学院化工系

出　　处：《中国有色金属学报》1998年第3期482-486,共5页The Chinese Journal of Nonferrous Metals

基　　金：湖南省科技攻关资助项目

摘　　要：硅铬铁合金冶炼时排出的铬铁渣，污染严重，难以治理，以铬铁渣为主要原料煅烧绿色硅酸盐水泥，是其治理和综合利用的有效途径。在对铬铁渣的原料特性进行分析的基础上，论证了铬铁渣煅烧绿色硅酸盐水泥熟料的可行性，并根据装饰水泥的特点，设计了低石灰饱和系数（ＫＨ＝０．８１）、高硅率（ＳＭ＝３．９２）、高铝率（ＩＭ＝１．８６）的配料方案，研究了煅烧过程的物理化学变化。实验结果表明：在１４５０℃下以铬铁渣为主要原料煅烧成的绿色硅酸盐水泥熟料，其主要矿物组成为３ＣａＯ·ＳｉＯ２和２ＣａＯ·ＳｉＯ２，水泥质量满足国家标准（ＧＢ１７５－９２）的要求，而且铬铁渣中Ｃｒ６＋也能被固定在水泥熟料的玻璃相中。Ferrochromic slag produced in the process of producing ferrochrome silicon alloy is an industrial pollutant. Calcining green portland cement used the ferrochromic slag as a main raw material is a vailuable way for its comprehensive utilization. By analysing its material properties, the feasibility of calcining green portland cement clinker was discussed. The composition scheme of low lime saturation factor(KH=0.81), high silica modulus (SM=3.92), and high aluminum modulus(IM=1.80) was designed according to the features of decorating cement. Moreover, the physical and chemical changes in calcining process were studied. The experimental results indicated that, when ferrochromic slag was used as main raw material to calcine green portland cement clinker at 1 450 ℃, the main mineral composition was 3CaO·SiO 2 and 2CaO·2SiO 2 , and the cement quality satisfied the demand of State Standard (GB175-92). And Cr 6+ in ferrochromic slag was also fixed in glass phase of cement clinker.

关 键 词：铬铁渣 绿色水泥熟料 煅烧机理 

分 类 号：X758.05[环境科学与工程—环境工程]