Abstract Phosphorus removal before finish rolling (remove the oxide iron on the surface of the slab after rough rolling) is the key equipment of hot rolling line. In view of the weakness of the frame of the phosphorus removal box and the deformation of the pinch roll arch existing in the high-pressure water jet phosphorus removal, the operation of the pinch roll is not smooth and the disassembly and assembly is difficult, the main column and archway of the phosphorus removal box are grooved and corroded by high pressure water, the unreasonable design of the roller cylinder resulted in a high failure rate, and the inconsistent elevation of the phosphorus removal roller transmission mechanism. In this paper, optimizing the overall structure and layout of the dephosphorization box in finishing rolling, using the U-shaped structure and increasing the strength of the pinch roll arch to ensure the stable operation of the pinch roll, adding the protective lining plate to the parts easy to be washed out of the dephosphorization box body, optimizing the installation and connection mode of the pinch roll oil cylinder, so as to reduce the failure rate of the oil cylinder. Optimize the hydraulic lubrication system such as pinch roll, dephosphorization roll and pneumatic hydraulic device of dephosphorization tank as a whole and increase the cooling of roller table and other improvement measures, improve the overall function and performance of dephosphorization tank before finishing rolling, meet the production demand on site and improve the product quality.
ZHAO Shengli. Optimized hot rolling descaling box structure before finishing rolling[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(6): 571-576.
2019, Vol. 24 
