CAJ | 학술논문

明确了碳足迹概念，综合森林面积对碳排放的缓解作用，并基于物流分析和投入产出的耦合法建立MFA-IO模型分析钢铁企业的碳足迹。以中国5个典型钢铁企业为实例，研究钢铁企业的吨钢产品的碳足迹及其影响因素。结果表明：从钢铁生产工序分析，炼铁工序的碳足迹最大，且消耗的能源中含有大量的焦炭、煤。其次是焦化、烧结工序。从气体种类分析，钢铁生产中碳足迹的主要贡献者是CO2，在5个案例分析中，CO2的贡献值均占到了70%以上。5个典型企业吨钢产品的碳足迹平均为0.325 hm2/t。其中，企业D的吨钢产品碳足迹最高，高达0.353 hm2/t，而企业E的最小，为0.303 hm2/t。这主要是由地域差异、企业周围能源分布差异、生产设备与技术差异等综合因素导致的。总体分析，5个典型企业总碳足迹合计为1989.58万hm2，超过5省森林面积的总和。表明其总CO2排放量就已超出森林吸收净化的能力，总温室气体排放量更是超出森林净化能力，即碳足迹的承载呈严重赤字。因此，研究如何减少中国钢铁工业吨钢碳足迹是十分必要和紧迫的。
명학료탄족적개념，종합삼림면적대탄배방적완해작용，병기우물류분석화투입산출적우합법건립MFA-IO모형분석강철기업적탄족적。이중국5개전형강철기업위실례，연구강철기업적둔강산품적탄족적급기영향인소。결과표명：종강철생산공서분석，련철공서적탄족적최대，차소모적능원중함유대량적초탄、매。기차시초화、소결공서。종기체충류분석，강철생산중탄족적적주요공헌자시CO2，재5개안례분석중，CO2적공헌치균점도료70%이상。5개전형기업둔강산품적탄족적평균위0.325 hm2/t。기중，기업D적둔강산품탄족적최고，고체0.353 hm2/t，이기업E적최소，위0.303 hm2/t。저주요시유지역차이、기업주위능원분포차이、생산설비여기술차이등종합인소도치적。총체분석，5개전형기업총탄족적합계위1989.58만hm2，초과5성삼림면적적총화。표명기총CO2배방량취이초출삼림흡수정화적능력，총온실기체배방량경시초출삼림정화능력，즉탄족적적승재정엄중적자。인차，연구여하감소중국강철공업둔강탄족적시십분필요화긴박적。
By definition of ecological footprint,carbon footprint is expressed in forest area. And the MFA-IO model was established to analyze carbon footprint in the whole process of iron and steel enterprise. Carbon footprint of per ton steel, was calculated in five typical iron and steel enterprises. Results show that carbon footprint of iron-making is largest ac-counting for 70%in iron and steel enterprises. And coke and coal are large consumption in iron-making,coking and sinter-ing process are less than iron-making. Analyzing the type of gas,carbon dioxide is a major contributor of carbon footprint in the whole production process. In the five cases,the contribution of CO2 values was accounted for about 70%. And the average carbon footprint of per ton steel products was 0.325 hm2/t. Among them,the Nanjing Steel carbon footprint of per ton steel products was up to 0.353 hm2/t,while Baosteel Branch's smallest was only 0.303 hm2/t. The differences are main-ly due to geographical differences,the distribution of energy around the enterprise and production equipment and technolo-gy. For overall analysis,the total carbon footprint was 19 895 800 hm2,the sum of the five provinces of forest area. This re-search shows that for only these five cases of iron and steel enterprises,the total GHG exceeded the purification capacity of the forest in the five provinces. Therefore,the study of China's steel industry to reduce the carbon footprint is very nec-essary and urgent.