基于LCA方法的铁矿烧结过程环境影响评价

Environmental impact assessment of iron ore sintering process based on LCA method

为研究铁矿烧结工序对环境造成的影响,以贵州某钢铁企业烧结厂为研究对象,综合烧结生产过程资源环境的属性特点,采用IMPACT World+影响评价方法选取10个影响类别进行生命周期分析及环境影响评价。以系统稳定运行1 a为功能单位构建烧结生命周期清单,按照清单结果进行LCA分析,识别其环境减排潜力。结果表明:能源消耗、人体毒性和全球变暖为铁矿烧结生产中贡献最大的环境影响,3项潜值分别为2.22×10^(-10)、9.89×10^(-11)和8.82×10^(-11),在终结点评价中人体健康、生态系统健康和能源消耗影响潜值依次为1.97×10^(-4)DALY、0.205 PDF·m^(2)·a和2.01 GJ。

In order to study the impact of iron ore sintering process on the environment,taking the sintering plant of an iron and steel enterprise in Guizhou as the research object,the attributes and characteristics of resources and environment in the sintering production process are synthesized,and the IMPACT World+impact assessment method is used to select 10 impact categories for life cycle analysis and environmental impact assessment.The life cycle inventory of sintering is constructed in a functional unit of 1 year stable operation of the system,and LCA analysis is conducted according to the inventory results to identify its environmental emission reduction potential.The results show that energy consumption,human toxicity and global warming has the biggest environmental impacts of iron ore sintering production,with three potential values of 2.22×10^(-10),9.89×10^(-11) and 8.82×10^(-11),respectively,the potential values of human health,ecosystem health and energy consumption in the endpoint evaluation are 1.97×10^(-4) DALY,0.205 PDF·m^(2)·a and 2.01 GJ.