Corrosion of magnesia-chromite refractory by PbO-rich copper slags
Corrosion of magnesia-chromite refractory by PbO-rich copper slags
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DOI：
10.1016/j.corsci.2021.109949
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发表时间：
2022-02-01
影响因子：
8.3
通讯作者：
Szczerba, Jacek
中科院分区：
文献类型：
--
作者：
Ludwig, Maciej;Sniezek, Edyta;Szczerba, Jacek
研究了三种富铅铜渣对直接结合镁铬耐火材料的侵蚀。颗粒试验、接触腐蚀试验和热台显微镜试验分别能够研究1300 ℃和1450 ℃下的腐蚀现象。对腐蚀后试样的组织和显微结构进行了深入分析，并对腐蚀后试样的组织和显微结构进行了图像检测。炉渣通过开孔和裂缝渗入耐火材料。炉渣成分向耐火材料中扩散，改变了耐火材料的原始成分。镁橄榄石固溶体，Mg 2SiO 4 s.s.其作为唯一的腐蚀产物形成，引起微观结构的膨胀和氧化镁-铬铁矿直接键的分解，这对耐火材料的性能至关重要。
The work presents corrosion of direct-bonded MgO-Cr refractory by three types of PbO-rich copper slags. Pellet test, contact corrosion test and hot stage microscopy test enabled to study corrosion phenomena at 1300 degrees C and 1450 degrees C, respectively. The structure and microstructure of the after-corrosion samples were deeply analyzed, with the former one aided by development of image detection algorithms. Slags infiltrated the refractory through open pores and cracks. Slag components diffused into refractory and changed its original composition. Forsterite solid solution, Mg2SiO4 s.s., which formed as the only corrosion product caused swelling of microstructure and disintegration of magnesia-chromite direct bonds, critical for the performance of refractory.