基于分层协调优化思想的钢包精炼过程钢水质量的稳定控制方法

项目名称： 基于分层协调优化思想的钢包精炼过程钢水质量的稳定控制方法

项目编号： No.61503068

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 自动化技术、计算机技术

项目作者： 吕伍

作者单位： 东北大学

项目金额： 20万元

中文摘要： 钢包精炼（LF）过程钢水质量的稳定控制是实现高质量、高附加值钢材产品生产面临的重要技术难题之一，稳定控制的关键在于LF过程控制的系统化和协调化，而目前的研究大多采用单体设计的方式对钢水温度、成分和纯净度的优化控制问题进行研究，不能满足系统性、协调性的实际需求。本项目针对LF钢水质量的稳定控制问题，提出以分层协调优化为核心、以工艺制度集约化与柔性化设计以及过程闭环控制为基础的多目标协调优化控制系统。提出分层结构的协调优化方法将现有各单体优化技术进行有机集成，实现过程操作的统筹调配；提出集约化和柔性化的工艺流程与工艺参数设计方法，以适应多钢种、多工况的生产条件变化。基于数据信息与机理建模深度融合的思想建立钢水温度和成分的高精度预报模型，为过程优化和闭环控制提供基础；将所提方法在已有实验平台上进行验证和完善，并逐步推广应用到1～2个LF生产过程。期望工艺与过程控制的一体化设计，形成实用化技术。

中文关键词： 钢包精炼过程；钢水质量；协调优化；混合建模；运行优化控制

英文摘要： Stable control of the steel quality in ladle furnace refining process is one of the important technical problems for producing steel products with high quality and high additional value. The key to obtain stability is to systematize and coordinate the LF process control. However, the existing research is not able to satisfy the practical requirement, for they commonly consider the research in the individual way for investigating the optimal control methods of temperature, chemical composition and purity of steel. In this study, for stable control of the steel quality, research in carried out to develop the multi-objective coordinated optimization control system which integrates stratified coordinated optimization strategy with intensive and flexible technic design as well as the closed-loop control technique. For obtaining cooperation, the existing individual optimization techniques are assembled with the proposed stratified coordinated optimization algorithm. To adapt to the production condition changes caused by multiple steel grades and working conditions, intensive technic process mode and flexible designed technic parameters are proposed. In order to provide basic for process optimization and closed-loop feedback control, high precise models for temperature and chemical composition prediction are developed based on the hybrid modeling methods which are deeply essential amalgamation of data information and mechanism modeling. The proposed methods are validated and improved on the existing experimental platform, and gradually applied to 1~2 LF production processes. It is expected to be a practical technique by the integration of technic and process control.

英文关键词： ladle furnace refining process;steel quality;coordinated optimization;hybrid modeling;operational optimization control