(1) Optimize the inner cavity size of the copper tube of the three billet molds, reduce the inverted taper by 0.05mm, increase the height of the pouring liqui

(1) Optimize the inner cavity size of the copper tube of the three billet molds, reduce the inverted taper by 0.05mm, increase the height of the pouring liquid level in the early stage, and make the liquid level in the area with higher sensitivity of the receiver, improve the ability of automatic control, and reduce the height The liquid level fluctuates greatly at the pulling speed.

(2) Optimizing the instrument control parameters, mainly by adding three control parameters to process signals, reducing the influence of false signals generated by high drawing speed, large liquid level fluctuations and "overturning" on normal pouring.

(3) When installing the cesium source, adopt reasonable installation methods to improve the signal strength and sensitivity of the upper part of the mold, and meet the needs of both opening and protection pouring processes.

Application effects and economic benefits The application of this system not only reduces the labor intensity of workers, but also produces the following effects:

(1) Improve the quality of cast slabs. The surface of the continuous casting slab is smooth and clean, with no visible slag inclusions, pits and micro-cracks on the surface. For the acid leaching inspection of the macrostructure of the continuous casting billet, the internal quality is improved, and the internal inclusion level is reduced by 0.5 to 1 level.

(2) The liquid level is stable and the pulling speed is stable. After the casting billet exits the mold, the billet shell is uniform. Also, it has sufficient strength to reduce breakout accidents. The monthly breakout rate of billet before and after the automatic liquid level control system of the mold copper tube was put into use was significantly reduced.