圆坯连铸结晶器温度、热流实测数据分析及检测系统的建立

【作者】 罗庆梅；

【导师】 姚曼；

【作者基本信息】 大连理工大学 ， 材料加工工程， 2004， 硕士

【摘要】 连铸结晶器被称作是连铸机的“心脏”。它承担着钢液初始凝固和形成具有一定坯壳厚度的连铸坯的任务，传热现象是其内部发生的重要物理现象之一。由于结晶器的工作状况非常恶劣，是一个很难深知的黑匣，且传热的效率及均匀性与铸坯的缺陷和漏钢事故直接相关。因此结晶器传热监控的研究从理论到实践上都存在一定困难。 本文分为实测数据分析、离线分析软件的开发和温度在线检测系统的建立三个部分。 实测数据分析：对在线检测的大量圆坯连铸结晶器的温度和热流数据进行了离线研究。讨论了一些主要的工艺参数如拉速、弯月面高度、进口水温、出口水温、冷却水流量、电磁搅拌(以下简称EMS)电流、EMS频率、振频、结晶器安装状态及水套水垢状况对热流的影响规律，为热流作为重要监测参数，应用于连铸生产提供依据，对监测结果提供技术指导。 离线分析软件部分：该软件主要从数据的时序值、波动值、平均值三个方面来分析各工艺参数对结晶器内传热的影响及结晶器内的热流分布规律。分别介绍了软件的功能、设计和应用。 温度在线检测系统：在组态王软件基础上利用C语言进行二次开发，采用PCL818L-A／D板和PCLD-789D调理放大板和工控机等硬件，建立温度实时检测系统。该部分主要介绍了系统的硬件构成、软件设计及系统的温度检测实验。检测实验证明该系统在实验室可完成温度数据实时采集显示、存储等功能，为开发在生产现场使用的相应实用系统准备条件。更多还原

【Abstract】 The mold have the name of "the heart of continuous caster", which takes up tasks of the beginning solidification of liquid steel and forming billet with some thickness, and heat transfer is one of the most important phenomenon happening in mold. The mold is working in hard condition, and the efficiency and uniformity of heat transfer is the most important for billet qualities and breakout. So investigation of the mold heat transfer monitoring has certain difficulty.The paper has three main parts: data analysis, the off-line analysis software developed and temperature on-line measuring system built.Data analysis: A great number of data of mold temperature and heat flux on-line measuring in continuous casting round billet has been off-line analyzed. The effect of some main parameters such as cast speed, meniscus height, import water temperature, export water temperature, cooling water flow, electromagnetic stirring (EMS) current, EMS frequency, mold oscillation frequency, the device status and boiler scale of mold on mold heat flux are discussed. It is the base for mold heat flux to be one of on-line monitoring parameters and provides monitoring result with technical director.Off-line analysis software: This part analyzes the effect of all technical parameters on mold heat transfer and profile of heat flow from time sequence value, average value, fluctuation value. It introduces distinguishingly function, design, and applying of the software.Temperature on-line measuring system: Based on the software KINGVIEW developed secondly by C programming language, temperature on-line measuring system is established, adopting PCL-818L A/D board, PCLD-789D amplifier board and industry computer. This part introduces mainly hardware composition, software design and measuring temperature experiment of system. It has been tested that the system can accomplish temperature real-time acquisition, display and save in laboratory, and enable corresponsive application system use in production site.更多还原