磷石膏炭热分解的热动力学研究
发布时间：2019-01-10 12:14
【摘要】：在活性炭掺量为10%~15%,煅烧温度为1100~1250℃条件下,从动力学和热力学角度对磷石膏分解煅烧制胶凝材的可行性进行了研究。在该温度范围内,通过等温热分析法确定了磷石膏分解体系的表观活化能为299.88~382.85 k J·mol~(-1),指前因子ln A为18.64~25.61 s~(-1),分解动力学方程为受三维扩散控制的Z-L-T方程。经Factsage软件计算和SEM、EDS、XRD等微观检测发现,煅烧过程中,不仅发生了硫酸钙的分解,还伴随着分解产物CaO和杂质SiO_2的合成反应。根据CaO-SiO_2-CaSO_4相图的理论计算结果表明,适量补充硅铝质改性组分,调节生料的配比范围,有使磷石膏基水硬性复合胶凝材料强度提升的潜能。
[Abstract]:The feasibility of pyrolysis and calcination of phosphogypsum for cementitious material was studied from the point of view of kinetics and thermodynamics under the conditions of 10 ~ 15% active carbon and 1 100 ~ 1 250 鈩，
本文编号：2406296
[Abstract]:The feasibility of pyrolysis and calcination of phosphogypsum for cementitious material was studied from the point of view of kinetics and thermodynamics under the conditions of 10 ~ 15% active carbon and 1 100 ~ 1 250 鈩，
本文编号：2406296
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