以煤矸石和粉煤灰为混合材的水泥生命周期环境影响评价

Environmental Impact Assessment of Cement Life Cycle with Gangue and Fly Ash as Mixed Material

采用LCA(生命周期评价)方法,对比研究了广州某水泥厂采用煤矸石和粉煤灰作混合材前后,分别生产的P·O42.5R水泥和P·Ⅱ42.5R水泥在整个生产过程的环境影响,并对评价结果进行了分析。选定气候变化(GWP)、环境酸化(AP)、非生物资源消耗(ADP)、富营养化(EP)、可吸入无机物(RI)以及光化学臭氧合成(POFP)6种环境影响类型指标作为评价指标。经过LCA计算得出,在水泥粉磨过程中加入3.34%的煤矸石和3.32%的粉煤灰,对水泥生产过程的六种环境影响类型指标均有降低作用,GWP、ADP、AP、EP、RI和POFP分别降低8.52%、9.18%、9.09%、8.68%、8.88%和8.29%。

The Life Cycle Assessment(LCA)method was used to compare and study the environmental impact of the whole production process of P·O 42.5R cement and P·Ⅱ42.5R cement produced before and after the use of mixed material in a cement plant in Guangzhou,and the evaluation results were analyzed.Six environmental impact types were selected:Global Warming Potential(GWP),Acidification Potential(AP),Abiotic Depletion Potential(ADP),Eutrophication Potential(EP),Respirable Inorganic material(RI),and Photochemical Ozone Formation Potential(POFP).LCA calculation shows that adding 3.34%gangue and 3.32%fly ash in the cement grinding process can reduce the six environmental impacts of the cement production process.GWP,ADP,AP,EP,RI and POFP decreased by 8.52%,9.18%,9.09%,8.68%,8.88%and 8.29%respectively.