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首页> 外文会议>7th international symposium on heat transfer (ISHT7'08) >ENERGY AND EXERGY ANALYSIS OF GRATE-KILN-COOLER PROCESS USED FOR INDURATION OF IRON ORE PELLETS
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ENERGY AND EXERGY ANALYSIS OF GRATE-KILN-COOLER PROCESS USED FOR INDURATION OF IRON ORE PELLETS

机译：铁矿石球团炉排炉冷却过程的能谱和能谱分析

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摘要

Although many models of iron ore pellets induration have been established and improved on the basis of the first law, the exergy-based analysis of the grate-kiln-cooler (GKC) process is rare. Therefore, exergy balance test was systematically carried out on a GKC plant in China. And according to the test, energy and exergy analysis has been conducted to investigate the irreversibilities of the process. The energy analysis shows that the largest energy losses resulting from the exhaust gas enthalpy, and the ones associated with water evaperation and grate are relatively large. On the other hand, the exergy analysis reveals that the largest exergy destruction associated with the heat transfer irreversibility, and the one resulting from combustion irreversibility is really quite large. Especially, the duplex macrostructure of the partially oxidized pellets has been discoverd in the final product. Further, some suggestions on how the processes could be improved have been posed specifically. This study provides a better understanding of the energy and exergy flows of iron ore pellets induration in the GKC plant. The findings of the present study can further be applied to perform process optimization to maximize the cost-effectiveness of iron ore pellets induration production by the plant.
机译：尽管已经根据第一定律建立并改进了许多铁矿石球团结硬模型，但是基于炉排的炉排-窑-冷却器（GKC）过程的分析却很少。因此，在中国的GKC工厂系统地进行了火用平衡测试。并根据测试，进行了能量和火用分析以研究该过程的不可逆性。能量分析表明，由废气焓引起的最大能量损失以及与水的蒸发和炉排有关的能量损失相对较大。另一方面，火用分析表明与传热不可逆性相关的最大火用破坏，而由燃烧不可逆性引起的火用破坏确实很大。特别是，在最终产品中发现了部分氧化的粒料的双重宏观结构。此外，已经提出了一些有关如何改进流程的建议。这项研究可以更好地了解GKC工厂中铁矿石颗粒硬化的能量和火用流。本研究的发现可进一步用于进行工艺优化，以使工厂生产铁矿石球团硬结的成本效益最大化。

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