提高方坯连铸机结晶器寿命工艺优化

Process Optimization for Improving the Service Life of Billet Caster Mold

为改善小方坯结晶器过钢量较低的现状,调研总结找出限制性环节。通过采取对结晶器铜管锥度与铸机拉速进行匹配,精确控制水缝尺寸,优化水质,降低中间包钢水过热度及优化操作规程等工艺优化措施,使坯料脱方率降至0.24%,漏钢率降至0.08%,铜管平均过钢量增至5120 t/支,涨幅约24.88%,满足了生产节奏的要求,节约了铜管消耗,降低了生产成本。

In order to improve the low amount of steel in the billet crystallizer,the research concluded a restrictive link.Through process optimization:the copper tube taper of the crystallizer matches the casting speed of the casting machine,the water seam size is precisely controlled,the water quality is optimized,the superheat of the tundish steel is reduced and the operation rules are optimized.The stripping rate of the billet is reduced to 0.24%,and the steel leakage rate is reduced to 0.08%.The average over-steel of copper pipes increased to 5,120 tons/piece,meeting the requirements of production rhythm,saving copper tube consumption and reducing production costs.