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首页> 外文期刊>ISIJ international >Determination of Free Magnesium Oxide in Steelmaking Slags by Microwave-Assisted-Hydration/Thermogravimetry
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Determination of Free Magnesium Oxide in Steelmaking Slags by Microwave-Assisted-Hydration/Thermogravimetry

机译：微波辅助水合作用/热解法测定炼钢炉渣中游离氧化镁

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摘要

A steelmaking slag is one of the main by-products of iron and steel. The slag has been reused as aggregate for road and civil constructions. However, the slags may contain free magnesia (f-MgO) that can cause expansive self-destruction by reactions with water and carbon dioxide in the air. It is thus very important in evaluating the quality of the slags as raw materials to develop an accurate and precise method for determination of f-MgO in the slag. However, a reliable analytical method for determination of f-MgO in slag samples has not been reported yet. In the present work, we developed a method for determination of f-MgO in the slags by hydration of f-MgO with microwave digestion followed by thermogravimetry (TG). The microwave assisted hydration with hot water over 100°C makes f-MgO to rapidly and completely convert into Mg(OH)_(2), the amount of which, in turn, can be determined by TG. The developed method was successfully applied to the determination of f-MgO in synthetic and real steelmaking slag samples.
机译：炼钢炉渣是钢铁的主要副产品之一。炉渣已被重新用作公路和民用建筑的骨料。但是，炉渣中可能含有游离的氧化镁（f-MgO），该游离的氧化镁可通过与空气中的水和二氧化碳反应而引起膨胀的自毁。因此，对于评估作为原料的矿渣的质量，开发一种精确而精确的测定矿渣中f-MgO的方法非常重要。然而，尚未有可靠的分析方法测定炉渣样品中的f-MgO。在目前的工作中，我们开发了一种通过微波消解然后热重分析（TG）的水合水合氧化镁来测定炉渣中的水合氧化镁的方法。微波辅助水合在100°C以上的热水作用使f-MgO迅速而完全地转化为Mg（OH）_（2），其含量可通过TG确定。所开发的方法已成功应用于合成和真实炼钢渣样品中f-MgO的测定。

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