Container Board

People pay more and more attention to eliminating the scratch on the surface of container plate. What is the effective method?

People pay more and more attention to eliminating the scratch on the surface of container plate. The analysis shows that with the continuous improvement of users' requirements for the surface quality of the container plate, the elimination of the surface scratch of the container plate. The sliding friction between the strip and the forming roll caused by the linear speed difference of each point of the roll is the root cause of the surface scratch of the container plate. Reasonably design the roll structure, accurately install and adjust the roll, Proper use of lubricating fluid can effectively prevent the surface scratch of container plate.

Causes of surface scratch of container plate the container plate formed by roll requires that the strip be bent into a circle laterally, which is realized by deforming the strip through a series of rolls with different pass patterns. Each pair of rolls rotate at a certain speed. However, the linear velocity of the roll surface is different due to different rotation radius. The sliding friction between the strip and the forming roll is the fundamental reason for the surface scratch of the container plate.

Based on the data statistics in recent two years, it is found that the breakout types of No. 1 slab caster in No. 3 steelmaking plant of Handan Iron and Steel Group mainly belong to two forms: bond breakout and crack breakout. Based on the discussion of the relationship between bonding breakout and crack breakout and molten steel composition, temperature, equipment and mold flux, the causes of molten steel breakout in No. 1 slab are analyzed. It is proposed to control ([S] + [P] < 0.04%) and raise the nozzle 10mm to improve the melting rate of mold flux when the superheat of molten steel is less than 10 ℃.

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