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首页> 外文会议>Clearwater clean coal conference;International technical conference on clean energy >Thermogravimetric analysis (TGA) and high temperature furnace (HTF) as an alternative to the CRI test
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Thermogravimetric analysis (TGA) and high temperature furnace (HTF) as an alternative to the CRI test

机译：热重分析（TGA）和高温炉（HTF）替代CRI测试

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Metallurgical coke, a porous carbon material produced by carbonization of coking coal at high temperature, generally above 900 °C, is an integral part of iron-making in the blast furnace. During iron making, coke has several important roles in the blast furnace such as a source of energy, as a reducing agent, to provide a permeable bed for gas flow and for providing enough strength to sustain the load of the charge within the furnace. A coke is said to be of good quality if the CRI is lower and CSR is higher. Reaction of coke with carbon dioxide increases the porosity of the coke and, hence, the coke strength decreases. However, tests involving CRI and CSR are very laborious and time-consuming. This study aims to propose TGA and HTF experiments as an alternative for the CRI test. In this study, a series of Thermogravimetric analysis (TGA) and high temperature furnace (HTF) experiments of various cokes were conducted in CO_2 atmosphere to observe kinetics of the CO_2 gasification; in particular the mass loss at certain soak temperature. The results from TGA and HTF showed a linear relation with the actual CRI values. The results from this study will help to predict the reactivity of the cokes and to decide the quality of different cokes. In a wider perspective, this study has high potential in assessing the reactivity index of the metallurgical cokes for iron-making industry.
机译：冶金焦炭是通常在900°C以上的高温下通过焦化煤碳化而制得的多孔碳材料，是高炉炼铁必不可少的一部分。在炼铁过程中，焦炭在高炉中具有几个重要作用，例如作为还原剂的能源，为气流提供了可渗透的床，并提供了足够的强度来维持炉内装料的负荷。如果CRI较低而CSR较高，则焦炭质量良好。焦炭与二氧化碳的反应增加了焦炭的孔隙率，因此，焦炭强度降低。但是，涉及CRI和CSR的测试非常费力且费时。这项研究旨在提出TGA和HTF实验作为CRI测试的替代方法。在这项研究中，在CO_2气氛中对各种焦炭进行了一系列的热重分析（TGA）和高温炉（HTF）实验，以观察CO_2气化的动力学。特别是在一定的保温温度下的质量损失。 TGA和HTF的结果与实际CRI值呈线性关系。这项研究的结果将有助于预测焦炭的反应性，并决定不同焦炭的质量。从更广泛的角度来看，这项研究在评估炼铁行业冶金焦的反应性指数方面具有很高的潜力。

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