提高方坯优质碳素结构钢连浇过程中包温度的稳定性

To Improve the Stability of Ladle Temperature during Continuous Casting of High Quality Carbon Structural Steel Billet

在生产牌号为20#~70#的钢种中,中包钢水过程温度波动性较大。对钢水中包过程温度极差值超过范围的炉次从其精炼过程、温度、浇注、节点等方面进行分析,找出影响浇注过程前期和后期中包温度波动较大的主要因素。通过减少过程温降、优化钢水罐使用、改进精炼炉造渣等措施使方坯优质碳素结构钢连浇过程中包温度的稳定性大幅度提高,有利于铸坯质量的稳定提高,降低冶炼成本15.96元/t,效益明显。

In the production of steel grade 20#~70#, the temperature fluctuation of the tundish molten steel process is large. The furnaces with a temperature range exceeding the range in the ladling process were analyzed from the aspects of the refining process, temperature, pouring and node, and the main factors affecting the large temperature fluctuation in the tundish at the early and late stages of the pouring process were found out. By reducing the temperature drop in the process, optimizing the use of the molten steel tank and improving the slag formation of the refining furnace, the stability of the ladle temperature in the continuous casting process of the high-quality carbon structural steel of the billet was greatly improved, which was beneficial to the stable improvement of the quality of the billet, and the smelting cost was reduced by CNY 15.96/t, with obvious benefits.