How to control the fluctuation of the liquid level in the crystallizer?The following measures can be taken:1. Improve mold powderThe use of special mold powder,

How to control the fluctuation of the liquid level in the crystallizer?

The following measures can be taken:

1. Improve mold powder

The use of special mold powder, increase the melting temperature and viscosity of the powder, and increase the alkalinity by changing the composition.

2. Secondary cooling control

Lower the target temperature in the upper part of the second cooling zone, increase the cooling intensity of the upper part of the second cooling zone (mainly 1, 2, and 3 stages), reduce the tendency of billet bulging, and alleviate the phenomenon of liquid level fluctuations.

3. The molten steel is overheated

Reduce the superheat of the molten steel entering the mold, reduce the temperature difference between the molten steel and the copper plate, reduce the thermal stress and shrinkage stress of the slab shell, appropriately increase the Mn content in the steel, reduce the S content, increase the molten steel Mn/S, and reduce The solidification speed is improved, and the liquid level fluctuation is alleviated.

4. Cooling water volume control

Reduce the water volume in the cold zone of the crystallizer, make the production of the slab shell uniform, and suppress the fluctuation of the crystallizer liquid level.