铬铁渣煅烧绿色水泥的机理

来源期刊：中国有色金属学报1998年第3期

论文作者：刘小波 肖秋国 付勇坚 赵红钢

文章页码：482 - 486

关键词：铬铁渣； 绿色水泥熟料； 煅烧机理

Key words：ferrochromic slag； green cement clinker； firing mechanism

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。

Abstract: 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 1450 ℃, the main mineral composition was 3CaO· SiO₂ and 2CaO₂·SiO₂, and the cement quality satisfied the demand of State Standard(GB175-92). And Cr⁶⁺ in ferrochromic slag was also fixed in glass phase of cement clinker.