用后镁碳砖再生工艺的生命周期评价和能耗分析  

Life cycle assessment and energy consumption analysis of regeneration process of used magnesia carbon bricks

作　　者：王靖东 龚先政[1] 周丽玮[2] 刘宇[1] 辉福美 WANG Jingdong;GONG Xianzheng;ZHOU Liwei;LIU Yu;HUI Fumei(Faculty of Materials and Manufacturing,Beijing University of Technology,National Engineering Laboratory for Industrial Bigdata Application Technology,Beijing 100124;China Building Materials Federation,Beijing 100831;Yunnan Punai Kungang High Temperature Materials Co.,Ltd.,Kunming 650302)

机构地区：[1]北京工业大学材料与制造学部,工业大数据应用技术国家工程实验室,北京100124 [2]中国建筑材料联合会,北京100831 [3]云南濮耐昆钢高温材料有限公司,云南昆明650302

出　　处：《中国建材科技》2022年第6期49-54,共6页China Building Materials Science & Technology

基　　金：国家自然科学基金创新研究群体(51621003);北京工业大学“城市碳中和”科技创新基金项目(NO.32)。

摘　　要：基于生命周期评价(LCA)方法量化分析用后镁碳砖再生工艺过程中资源/能源消耗、污染物排放和环境影响潜力,其中用后砖再生料的添加比例控制在70%左右,电熔镁砂和石墨为配料。结果表明,生产1吨再生镁碳砖中全球变暖潜值最大,约1.45×10^(3)kg CO_(2)eq.,矿产资源耗竭、化石能源耗竭和人类非致癌毒性潜值较大,分别为7.20×10^(2)kg Cu eq.,3.49×10^(2)kg oil eq.和2.94×10^(2)kg 1,4-DCB eq.。归一化后的总环境影响为3.12,相对损害最大的影响为人类非致癌毒性,主要是生产过程中电力需求大造成;相对损害最大的生产单元过程是配料电熔镁砂和鳞片石墨的生产阶段,贡献了1.76,其次是原料加工、原料再生料的生产,分别贡献1.01和0.12,坯体制备、热处理和成品加工仅贡献了少量环境影响。Based on the life cycle assessment (LCA) method,the resource/energy consumption,pollutant emission and environmental impact potential of used magnesia carbon bricks are quantified.The add proportion of used brick as raw material is controlled at 70%,and fused magnesia and graphite are used as ingredients.The results show that the global warming(GWP) is the largest in the production of 1 ton of recycled magnesia carbon bricks,which is 1.45×10^(3)kg CO_(2)eq.,and the potential values of mineral resource depletion (SOP),fossil energy depletion (FFP) and human non-carcinogenic toxicity (HTPnc) are large,which are 7.20×10^(2)kg Cu eq.,3.49×10^(2)kg oil eq.and 2.94×10^(2)kg 1,4-DCB eq.,respectively.After normalization,the total environmental impact is 3.12,and the impact of HTPnc with the largest relative damage is mainly caused by the large power demand in the production process.The production unit processes with the greatest relative damage are the production stage of fused magnesia and flake graphite,contributing 1.76,followed by raw material processing and raw material recycling,contributing 1.01 and 0.12,respectively.Blank preparation,heat treatment and finished product processing only contribute a small amount of environmental impact.

关 键 词：用后镁碳砖 再生利用 能源消耗 环境影响评价 

分 类 号：X75[环境科学与工程—环境工程]