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首页> 外文期刊>Applied Magnetic Resonance >A stray-field imaging, CRAMPS and MQMAS study of the drying process of precasting materials used in a steel-making converter
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A stray-field imaging, CRAMPS and MQMAS study of the drying process of precasting materials used in a steel-making converter

机译：杂散场成像，CRAMPS和MQMAS对炼钢转炉中预制材料干燥过程的研究

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Optimization of the drying process conditions in a steel-making converter in a steel works is very difficult since the process is off-line and time-consuming. However, it is important to optimize drying process conditions (temperature, surface active agents, etc.), as steam explosion can readily occur with insufficient drying time. To help understanding, we have demonstrated that we can monitor the drying of real refractory mortar with stray-field imaging. We chose this method because of the possibility of detecting short T-2 components. This paper shows the effect of varying water content in different materials on the drying rate. In particular, we find that the free-water loss rate is relatively independent of water content. However the bound-water loss rate is more affected. Also, solid-state nuclear magnetic resonance (NMR) (H-1-CRAMPS and Al-27 M(3 and 5)QMAS) studies are performed to clarify the change of chemical structure by drying treatment. It is clear that imaging and solid-state NMR give useful information to optimize drying conditions. With this data, we can adjust and optimize the drying process and time in steel works. [References: 21]
机译：在钢厂中，在炼钢转炉中优化干燥工艺条件非常困难，因为该工艺离线且耗时。但是，优化干燥工艺条件（温度，表面活性剂等）非常重要，因为在干燥时间不足的情况下很容易发生蒸汽爆炸。为了帮助理解，我们证明了我们可以使用杂散场成像监控真正的耐火砂浆的干燥。我们之所以选择这种方法，是因为有可能检测到短的T-2成分。本文显示了不同材料中含水量的变化对干燥速率的影响。特别是，我们发现自由水的损失率与水含量相对无关。但是束缚水损失率受到的影响更大。此外，进行了固态核磁共振（NMR）（H-1-CRAMPS和Al-27 M（3和5）QMAS）研究，以弄清干燥处理后化学结构的变化。显然，成像和固态NMR为优化干燥条件提供了有用的信息。借助这些数据，我们可以调整和优化钢铁厂的干燥过程和时间。 [参考：21]

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