Control method for end point aluminum in VD vacuum process

The invention discloses a control method for end-point aluminum in a VD vacuum process, which comprises first-stage aluminum feeding amount, second-stage aluminum feeding amount, first-stage vacuum treatment time and second-stage vacuum treatment time. According to the control method for the end-point aluminum in the VD vacuum process, the traditional mode that the aluminum is kept for 20-22 minutes once when VD is less than or equal to 66Pa is changed into a mode that the aluminum is kept for 13-15 minutes and 5-7 minutes; according to the molten steel aluminum yield in the first stage and the molten steel outbound aluminum content target value, the molten steel aluminum feeding amount in the second stage is determined, the molten steel outbound aluminum content is controlled within the range of 0.020%-0.040%, the method is easy and convenient to operate, and the molten steel outbound aluminum content can be controlled within the range of 0.020%-0.040% with low cost. 本发明公开了一种VD真空过程终点铝的控制方法，包括第一阶段喂铝量、第二阶段喂铝量、