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The partition wall of hot blast furnace welding
2017-11-15
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  • The gas well wall of the furnace in an iron and steel company was scoured by airflow frequently; in addition, the thermal shock resistance of bricks was flawed, causing peeling and falling off of clay bricks on the exterior wall of the gas well and a large sized crack on the clay bricks inside the gas well, forming a hole which was about 1,500 mm high, 400mm wide and 300mm deep. Cold air flew into the heater directly via the hole, causing short circuit of air flow, so that the blast furnace failed to heat the checker bricks to the predetermined temperature, greatly reducing the efficiency of hot air. By using the ceramic soldering technology of the company, the hole was welded up tightly; the hot air temperature increased significantly and the reached specified operating temperature. The welded area maintained safe operation for 28 months.

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