氧化铝不同生产工艺资源环境效率比较
投稿时间:2017-10-19  修订日期:2018-01-02  点此下载全文
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作者单位E-mail
高天明 中国地质科学院矿产资源研究所 gaoming0920@aliyun.com 
杨沁东 中国地质大学(北京) 790586746@qq.com 
代涛 中国地质科学院矿产资源研究所  
基金项目:中国地质调查局地质调查项目“中国铁铜铝等资源循环调查评价”(编号:121201103000150015)资助。
中文摘要:近年来中国氧化铝产量的不断增加不仅引起了铝土矿资源和能源的巨大消耗,同时也对环境造成了一定压力。为了解决氧化铝工业中的资源损失与环境污染问题,本文将比较不同氧化铝生产工艺的铝资源效率、能耗和二氧化碳排放强度差异,为氧化铝工业的可持续发展提供借鉴。基于三种主要氧化铝生产工艺的典型企业的物料数据,构建了拜耳法、烧结法和联合法氧化铝生产工艺的物质流图,并以物质流、能量流分析为基础,比较分析了三种工艺的的资源效率、能源效率和污染物排放强度,研究得到:拜耳法工艺的主要特点为能耗低,但铝金属的损失量很高,对水体与土壤的影响较大;烧结法能耗与碳排放高,降低能耗的空间大;联合法铝的资源利用率最高。
中文关键词:氧化铝  生产工艺  物质流  能耗  碳排放
 
Comparison of Resources and Environmental Efficiency of Different Alumina Production Process
Abstract:The continue increase of China"s aluminum production in recent years not only caused a huge consumption of bauxite resources and energy, but also lead to negative impact on the environment. In order to solve the problem of resource loss and environmental pollution in alumina industry, aluminum resource efficiency, energy intensity and carbon dioxide emission factor of different alumina production processes were compared in this paper for the sustainable development of alumina industry. Based on the material data of typical enterprises of three major alumina production processes, we constructed the material flow diagram of Bayer process, Sintering process and Combination process ; and compared the resources and energy efficiency and carbon emission intensity of the three processes. The results show that: the Bayer process are characterized by low energy consumption and high metal loss, and its red mud is serious to water and soil; Energy intensity and carbon emissions are the highest for Sintering method, thus it has great potential for energy conservation and emission reduction; and Combination process has the highest utilization of aluminum resources.
keywords:alumina  production processes  material flow  energy consumption  carbon emission
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