罩退过程以黏结防治为目标的装炉优化技术

Furnace charging optimization technology of bell-type annealing process aiming at sticking prevention

针对以往罩退过程中装炉时仅考虑退火效率而不考虑缺陷防治的问题,结合罩退机组的设备与工艺特点,经过大量的现场试验与理论研究,在分析了装炉工艺对黏结缺陷影响机制并定义了黏结指数新概念的基础上,充分考虑到卷取工艺制度、卷径大小、产品规格、退火工艺制度等对钢卷内部应力的影响,采用多目标函数优化方法,兼顾生产效率与缺陷防治,以钢卷装炉后炉台的数量尽可能接近理论最小炉台总数、同批次所有钢卷黏结指数均值与峰值都最小为目标,提出了一套适合于罩退过程中以黏结防治为目标的装炉优化技术,并将其应用到某冷轧薄板厂的生产实践,取得了良好的使用效果,使得生产线产量提高了5.5%、黏结发生率下降了12.4%,为企业创造了较大的经济效益,具有进一步推广应用的价值。

Since only the annealing efficiency was considered and the defect prevention in the bell-type annealing process was not involved in the past, taking into account the equipments and technological characteristics of bell-type annealing line, the influence mechanism of furnace charging process on sticking defect was analyzed through a mass of field experi- ments and theoretical studies, and the concept of sticking index was defined. Also, the effect of the coiling process, the coil size, the product specifications and the annealing process on the internal stress of steel coils was fully considered. The method of multiple objective function optimization was adopted. Considering both production efficiency and defect pre- vention, a suitable furnace charging optimization technology of bell-type annealing process aiming at sticking prevention was introduced by taking the steel coil base number as close as possible to the theoretical minimum and minimizing the av- erage and the peak of sticking index of the same batch of the steel coil after charging as the target, and it was applied to the production practice of a cold rolled sheet plant. Good application effect was achieved with increased production by 5.5% and decreased occurrence rate of sticking by 12.4%, creating a great economic benefit for the enterprise and possessing fur- ther popularization and application value.