灰色条带状缺陷中外来物主要为氧化镁，并含少量黄长石，来源于渣线镁碳砖耐火材料；
Inclusions in the gray strip defects consist of MgO and trace melilite, which result from MgO-C refractory in slag line.
灰色条带状缺陷中外来物主要为氧化镁，并含少量黄长石，来源于渣线镁碳砖耐火材料；
Inclusions in the gray strip defects consist of MgO and trace melilite, which result from MgO-C refractory in slag line.
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