Method for improving surface quality of medium-thick plates
A technology of surface quality and heating process, which is applied in the field of steel rolling technology, can solve the problems of increasing the difficulty of descaling and descaling headers of rolling mills, large thickness of secondary oxide scale, pitting on the surface of steel plates, etc., and achieves the effect of suppressing secondary oxide scale Produce, shorten the waiting time, reduce the effect of oxidation burning
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[0017] Optimizing the heating process:
[0018] When the slab is heated in the heating furnace, the main reasons affecting the oxidation of the slab are heating temperature, heating time, and air-fuel ratio. When the heating temperature is too high, the time is too long, and the air-fuel ratio is too large, the iron oxide scale will be thick and sticky, which is difficult to remove, and the large scale iron oxide scale will be pressed during rolling. Therefore, in the heating process, the heating temperature, heating time, air-fuel ratio, etc. should be strictly controlled. In order to achieve the purpose of precisely controlling the furnace temperature, the burners adopt pulse combustion control, that is, to control the combustion time of each burner, so that each burner of the heating furnace operates under its optimal working condition, so as to ensure the temperature in the furnace. Uniformity, to realize automatic and precise control of furnace temperature, to ensure tha...
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