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钢铁生产过程二氧化碳排放量的精确计算是钢铁行业节能减排的基础。对钢铁生产流程二氧化碳排放的3种常用温室气体排放计算方法进行介绍,并基于A钢厂2014年的生产数据进行计算和分析对比。《省级温室气体清单编制指南》、《钢铁碳排放指南》两种计算方法都是基于投入产出的统计方法,两者温室气体计算结果数值相近,前者吨钢二氧化碳排放结果为2.116 t,后者吨钢二氧化碳排放结果为2.013 t,后一种方法在计算时考虑了固碳产品的抵扣,所以结果比前种方法结果偏小。基于ISO标准的钢铁产品生命周期计算方法,计算边界从铁矿石、煤炭等原材料的采掘、洗选、运输,焦化,烧结,高炉,炼钢,轧制等直到钢铁产品的出厂,计算结果吨钢产品二氧化碳排放量为2.309 t,相比前两种方法计算结果数值较大,这是因为在计算时包含了铁矿石、煤炭等在开采、洗选、运输阶段产生的二氧化碳。
The precise calculation of carbon dioxide emissions in the steel production process is the basis for energy saving and emission reduction in the steel industry. Three commonly used greenhouse gas emission calculation methods for carbon dioxide emissions from steel production processes are introduced and compared based on 2014 production data of A Steel Plant. Both the provincial GHG inventory compilation guide and the steel carbon emission guideline are based on the input-output statistical method. The results of the two GHGs are similar. The former results in 2.116 tons of CO2 emission per ton of steel, The carbon dioxide emission per ton of steel is 2.013t. The latter method takes into account the deduction of carbon sequestration products when calculating, so the result is smaller than the previous method. Based on the ISO standard steel product life cycle calculation method, the calculation of the boundary from the iron ore, coal and other raw materials mining, washing, transportation, coking, sintering, blast furnace, steelmaking, rolling and other steel products until the factory, the results of tons The carbon dioxide emission of steel products is 2.309 t, which is larger than that of the first two methods. This is because the calculation includes the carbon dioxide generated during the mining, washing and transportation phases of iron ore and coal.