School of Information Science and Engineering, Central South University, Changsha 410083, China.
Sensors (Basel). 2018 Nov 6;18(11):3792. doi: 10.3390/s18113792.
The temperature measurement of blast furnace (BF) molten iron is a mandatory requirement in the ironmaking process, and the molten iron temperature is significant in estimating the molten iron quality and control blast furnace condition. However, it is not easy to realize real-time measurement of molten iron temperature because of the harsh environment in the blast furnace casthouse and the high-temperature characteristics of molten iron. To achieve continuous detection of the molten iron temperature of the blast furnace, this paper proposes a temperature measurement method based on infrared thermography and a temperature reduction model. Firstly, an infrared thermal imager is applied to capture the infrared thermal image of the molten iron flow after the skimmer. Then, based on the temperature distribution of the molten iron flow region, a temperature mapping model is established to measure the molten iron temperature after the skimmer. Finally, a temperature reduction model is developed to describe the relationship between the molten iron temperature at the taphole and skimmer, and the molten iron temperature at the taphole is calculated according to the temperature reduction model and the molten iron temperature after the skimmer. Industrial experiment results illustrate that the proposed method can achieve simultaneous measurement of molten iron temperature at the skimmer and taphole and provide reliable temperature data for regulating the blast furnace.
高炉（BF）铁水的温度测量是炼铁过程中的强制性要求，铁水温度对于估计铁水质量和控制高炉状况具有重要意义。然而，由于高炉炉前环境恶劣和铁水的高温特性，实现铁水温度的实时测量并不容易。为了实现对高炉铁水温度的连续检测，本文提出了一种基于红外热成像和温度降低模型的测量方法。首先，使用红外热像仪捕捉撇渣器后的铁水流动的红外热图像。然后，基于铁水流动区域的温度分布，建立温度映射模型来测量撇渣器后的铁水温度。最后，开发了一个温度降低模型来描述出铁口和撇渣器处铁水温度之间的关系，并根据温度降低模型和撇渣器后的铁水温度来计算出铁口处的铁水温度。工业实验结果表明，所提出的方法可以实现撇渣器和出铁口处铁水温度的同时测量，并为调节高炉提供可靠的温度数据。
