莱钢8m^2竖炉齿辊卸料装置优化改造实践

Optimizing and Transforming Practice of Fluted Roller Discharge Device for Laiwu Steel’s 8m^2 Vertical Furnace

莱钢针对8m2竖炉齿辊卸料装置使用寿命低的问题,对齿辊结构及材质等进行优化改进。动辊齿辊采用3段焊接结构形式,辊身由45#钢热轧厚壁无缝管加工,表面堆焊,并加强密封;静辊也采用厚钢板冲压焊接表面堆焊的方式。改进后卸料装置使用寿命由6个月提高到24个月以上,检修周期由2个月延长到6个月,年降低备件费用180万元。

Pointing at low service life of the fluted roller discharge device for 8 m^2 vertical furnace, Laiwu Steel optimized and improved the structure and material of the fluted roller. The dynamic fluted roller is made by three segments of welded structure. The roller barrel is made of hot roiled thick wall seamless pipe of 45 steel, which is of surface welding, and the seal unit is strengthened. The static roller is also made of thick plate steel welding and surface welding. After transformation, the service life of the discharge device was increased from 6 months to 24 months above, maintenance period was extended from 2 months to 6 months and the cost of spare parts was reduced by 1.8 million RMB per year.