对钢铁厂炼钢－连铸计划与调度中的炉次计划建立了一个最优炉次计划混合整数规划模型．为了用遗传算法求解这一带约束条件的混合整数规划模型，提出了一种染色体的构造策略和交叉、变异方法，解决了迭代过程中满足可行性要求的问题，经用实际数据进行计算，表明所给模型和算法是有效的． An optimal heat exchanger sub-plan mixed integer programming model was established for the steelmaking-continuous casting and scheduling in the steelworks. In order to solve this hybrid integer programming model with constraints, a chromosome construction strategy and crossover and mutation methods are proposed to solve the problem of meeting the feasibility requirements in the iterative process. Calculating with the actual data shows that It is effective for models and algorithms.