基于符号经济模型的转炉—精炼工序热经济分析

Thermoeconomic analysis on the converter-refining procedure based on the symbol exergy-economic model

以S钢厂生产SPHC钢种的转炉-精炼工序为实例,采用热经济学分析方法中的经济分析法对其建立符号经济模型,构造成本平衡方程,并建立补充方程,进而对转炉-精炼工序进行热经济成本分析,得到了工序各股流的单价以及热经济学成本.模型计算结果表明:转炉-LF流程的精炼钢水热经济成本最低,为2243.12元·t^(-1),其次是转炉-CAS流程,为2259.92元·t^(-1),而转炉-RH流程的吨钢精炼钢水热经济学成本最高,为2270.16元·t^(-1).从节约能源和成本的角度,转炉-LF流程是SPHC钢种的合理生产流程.

Taking the converter-refining procedure of a steel plant as an example,symbol exergy-economic model was established by the exergy-economic analysis method. Then the cost balance equation was constructed,and supplementary equations were established. The unit exergy price and thermal-economic cost of each exergy flow in the procedure were obtained on the converter-refining procedure through thermal-economic analysis. The results show that the thermoeconomic cost of per ton molten steel in the converterladle refine process is the lowest,which is 2243. 12 RMB. The thermoeconomic cost of per ton molten steel in the converter-CAS refining process comes second,which is 2259. 92 RMB. And the converter-RH refining process has the highest thermal-economic cost of per ton molten steel,which is 2270. 16 RMB. From the standpoint of energy conservation and cost reduction,the converter-refining process is the reasonable process for SPHC steel production.