水泥生产中矿渣综合利用的环境负荷分析研究  

Environmental Impact Analysis on Slag as Secondary Raw Material in Cement Production

作　　者：黎瑶[1] 刘宇[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《中国材料科技与设备》2014年第3期44-48,共5页Chinese Materials Science Technology & Equipment

基　　金：国家863计划“多元复合胶凝材料全生命周期设计制备关键技术”项目（2013AA031602）

摘　　要：本研究采用生命周期评价方法定量化利用矿渣生产水泥的环境影响潜力，并与硅酸盐水泥进行对比分析，据此辨识水泥生产中矿渣综合利用的环境热点与改进潜力。研究结果显示，利用矿渣生产水泥的环境负荷相对于硅酸盐水泥降低15％，同时可以避免矿渣处置造成的环境影响。此外，研究证明矿渣在水泥中利用的相关环节，生产过程燃煤燃烧的直接排放与消耗电力的间接排放是造成环境影响的主要来源。因此，降低水泥生产能耗与增加余热回收率是降低环境影响的最有效措施。根据分析，若能达到国际先进化水平15．6％的余热回收率，可进一步使水泥的环境负荷降低6％左右。The environmental impact caused by the utilization of slag as secondary raw material in cement production was quantified using life cycle assessment methodology in this research. Moreover, the environmental hot spots and improvement potential of slag cement production were identified based on the comparative analysis between slag-based cement and portland cement. The results showed that the environmental toad of slag cement had decreased about 15% compared with portland cement. Meanwhile, the utilization of slag as secondary raw material in cement production can also avoid the environmental impact caused by the disposal of slag. In addition, It was found that the direct emissions caused by coal-fired combustion and the indirect emissions caused by power consumptionwere the main sources result in environmental impacts in the related processes of slag utilization. Therefore, reducing energy consumption in cement production and increasing waste heat recovery are the most effective measures to improve the environmental performance of slag-based cement. According to the analysis, if the rate of waste heat recovery reaches the international advanced level （15.6%）, the environmental impact will be further reduced by about 6%.

关 键 词：水泥 矿渣 生命周期评价 环境负荷 

分 类 号：X75[环境科学与工程—环境工程]