Study on hydrogen smelting reduction behaviour in synthetic molten HIsarna slag
Study on hydrogen smelting reduction behaviour in synthetic molten HIsarna slag
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DOI：
10.1080/03019233.2023.2204267
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发表时间：
2023-05
影响因子：
2.1
通讯作者：
Theint Theint Htet-Theint;Zhiming Yan;Bharath Kumar Sampath Kumar-Bharath-Kumar-Sampath-Kumar-2215925368;Johannes L. T. Hage;K. Meijer;Zushu Li
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文献类型：
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作者：
Theint Theint Htet-Theint;Zhiming Yan;Bharath Kumar Sampath Kumar-Bharath-Kumar-Sampath-Kumar-2215925368;Johannes L. T. Hage;K. Meijer;Zushu Li
用两种实验方法研究了人工合成Hisarna渣中FeO还原氢气的行为：(1)分别在1450℃、1475℃、1550℃下向熔渣中吹入5%或10%H2-Ar，以及(2)向熔渣中注入10%H2-Ar，流量分别为0·5、1·0、1·5 L·min·−-1。通过向熔渣中注入气体可以显著提高反应速度；在气体注入过程中会产生气泡，从而使气体和液态渣之间有足够的表面积。整个还原过程受注入情况下FeO的液相传质控制，符合穿透理论。
The reduction behaviour of hydrogen with FeO in synthetic molten HIsarna slag has been investigated using two experimental methods: (1) Blowing 5% or 10% H2-Ar onto the molten slag at 1450°C, 1475°C, 1550°C, respectively; and (2) Injecting 10% H2-Ar into the molten slag at the flowrates of 0.5, 1.0, 1.5 L min−1. During the gas blowing onto the melt, the reaction is initially controlled by gas phase diffusion, followed by limitation of liquid phase diffusion. The reaction rate is significantly improved by injecting the gas into the molten slag; bubbles are generated during the gas injection resulting in ample surface area between the gas and liquid slag. The overall reduction is controlled by the liquid phase mass transfer of FeO in the injection case; described by the penetration theory.