腐蚀
材料科学
尖晶石
钾
镁
冶金
马弗炉
管式炉
燃烧
化学工程
化学
催化作用
煅烧
生物化学
工程类
有机化学
作者
Ying Zhao,Guishi Cheng,Fei Long,Lu Liu,Changqing Dong,Xiaoqiang Wang,Jin Zhao
出处
期刊:Materials
[MDPI AG]
日期:2018-12-18
卷期号:11 (12): 2584-2584
被引量:7
摘要
As a kind of renewable resource, biomass has been used more and more widely, but the potassium contained in biomass can cause corrosion of the refractory. For a better understanding of corrosion thermodynamic mechanisms, the five components of common refractory materials (magnesium chrome spinel MgO·Cr₂O₃, magnesium aluminum spinel MgO·Al₂O₃, Al₂O₃, MgO, and Cr₂O₃) with potassium salts (K₂CO₃, K₂SO₄, and KCl) under high-temperature were studied by using the FactSageTM 7.0 software. Thermodynamic calculation results indicate that MgO is the best corrosion resistance of the five components of refractory materials. Based on the obtained results, the corrosion experiments in the laboratory were carried out (muffle furnace or high-temperature tube furnace) for corrosion reaction of KCl and MgO. The chemical compositions of the corroded samples were analyzed by X-ray diffraction (XRD). Under laboratory conditions (600⁻1200 °C), no corrosion products have been observed in the high-temperature corrosion experiments. The result indicates that to prevent the corrosion processes, refractories should contain as much MgO as possible.
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