在炼钢-连铸中，改进后的新工艺条件使得中间包寿命的评价方法由固定炉数变成了固定时间，针对这种变化，建立了相应的中间包优化模型。模型中考虑了炉次计划中的钢种、浇铸宽度、拉速等因素对浇铸时间的影响。采用启发式和DNA进化相结合的方法求解模型，先设计了3个启发式算法，然后在此基础上设计了基于DNA进化的优化方法，并给出了详细步骤。通过对企业实际生产数据进行仿真计算，其结果表明优化后的中间包利用率明显提高，从而验证了该方法的有效性。
The new improved technique of steelmaking-continuous casting brought about the changes from fixed furnace counts to a fixed time for evaluation mode of tundish lifetime and a corresponding optimization model for tundish plan was constructed. The effects of steel grade, casting width and draw-speed to casting time were taken into account in the model. And then, an optimization method combining heuristic algorithm and DNA evolutionary algorithm was proposed to solve the model. Three heuristic algorithms were designed and detailed steps of DNA evolution process were given based on heuristic algorithm. By simulating on the real production data, the result shows that the proposed optimization method may improve the utilization rate of tundish and is effective.
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