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In Situ Temperature Measurement of Sinter Beds at High Spatial and Time Resolution

机译：高空间和时间分辨率的烧结床的原位温度测量

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摘要

In the sintering process during iron making, the sintering reaction proceeds in a packed bed along with the combustion of coke particles. Although detailed temperature information is necessary to improve the process, it is difficult to measure the temperature distribution inside the packed bed with high spatial and time resolution. We performed in situ temperature measurement inside the sinter bed at high spatial and time resolution, i.e. , 2 mm and 10 s, respectively, during sintering. A sheathed thermocouple was scanned at optimized scan speed along the inside of the thin-wall alumina tube which was held perpendicular inside the sinter bed. The information on the temperature variation during sintering showed a clear correlation between the quality of the sinter and the sinter heat pattern for each layer. Further analysis also showed that the flame front speed is proportional to the O_(2) consumption in the sinter bed. The temperature measurement technique enabled an unprecedented detailed discussion with the temperature distribution inside the sinter bed during sintering. This technique will not only help to improve the sintering process but also provide beneficial information on the chemical reactions occurring inside packed beds.
机译：在炼铁过程中的烧结过程中，随着焦炭颗粒的燃烧，烧结反应在填充床中进行。尽管详细的温度信息对于改进该过程是必需的，但是很难以高空间和时间分辨率来测量填充床内部的温度分布。我们在烧结床内部以高空间和时间分辨率（即i.e.在烧结过程中分别为2毫米和10 s。沿着薄壁氧化铝管的内部以优化的扫描速度扫描护套的热电偶，该管垂直固定在烧结床内部。有关烧结过程中温度变化的信息表明，烧结质量与每一层的烧结热图之间存在明显的相关性。进一步的分析还表明，火焰前移速度与烧结床中的O_（2）消耗成正比。温度测量技术在烧结过程中对烧结床内部的温度分布进行了前所未有的详细讨论。该技术不仅有助于改善烧结过程，而且还可以提供有关填充床内部发生化学反应的有益信息。

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