The blast furnace hearth is the key part that restricts blast furnace campaign to over 15 years and the key factor determining blast furnace campaign. The direct causes for temperature rise on side wall of hearth are determined to be aggravated circulation of molten iron and severe erosion of carbon brick through studying erosion mechanism of hearth aiming at the rise of side wall temperature of 5#blast furnace hearth. The temperature at iron notch of elevation of 8. 663 m for side wall of hearth is decreased and basically stabilized at 350～450 ℃ before blowing out,which is within controllable range through taking such preventing measures as setting the early warning standards,strengthening daily management,op-timizing standards of depth of iron notch and strengthening maintenance as well as adjusting production and operation pa-rameters based on three-grade early warning.
关键词
高炉长寿/炉缸/侧壁温度/预警管控/铁口深度
Key words
blast furnace longevity/hearth/side wall temperature/early warning and control/depth of iron notch
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