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| cause of hearth burning-through (【技】炉缸烧穿事故不但使生产和设备遭受重大损失，而且可能引起人身事故。炉缸烧穿的原因包括：砖衬质量差、施工质量差、冷却强度低、冷却水管长期未清洗、冷却器长期漏水、炉缸局部碳砖被氧化、缺少必要的设备检查制度、高炉热制度不稳定、出铁口长期过浅等。) | |||
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