Sidewall eddy current monitoring of molten metal level and proximity in pyrometallurgical furnaces

火法冶金炉中熔融金属液位和接近度的侧壁涡流监测

• 批准号: 533336-2018
• 负责人: Krause, Thomas
• 金额: $ 7.29万
• 依托单位: Royal Military College of Canada
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=692808
• 关键词: Sidewall; eddy; current; monitoring; molten

Accurate knowledge of molten metal levels in pyrometallurgical furnaces is desired in order to optimize when and for how long tapping operations should be performed. In addition, proximity of molten metal, as measured from the furnace side wall, can provide an estimate of remaining refractory wall, an important gauge of the furnace's long term structural integrity. This work will focus on challenges to develop a novel electromagnetic field sensing system that could be used to remotely monitor the level and proximity of molten metal inside a pyrometallurgical furnace. This capability is not presently addressed by existing, commercially available, inspection systems. The technology used for this project will be eddy current based, which has demonstrated its capability to perform inspection at larger distances for various applications, such as metal detection. This proposal is an extension of our previous experimental work using eddy current based technology, which demonstrated the feasibility of detecting molten metal level combined with sensitivity to metal proximity under simulated pyrometallurgical furnace conditions. The main focus of this phase of work is to address the signal processing required to separate and report the two key desired process parameters, metal level and metal distance, from the measured eddy current signals. Following the approach used in the first phase, the work will involve computer modelling and tests using actual coils in a laboratory setting. The eventual target is to build a prototype for testing in an actual furnace. This will require optimization of parameters, such as coil geometry, coil spacing and initial distance to molten metal bath. In addition, there are other parameters, which can affect the measurements, such as high temperature, proximity of other metal conductors and background noise in an actual furnace, which need to be explored.

为了优化何时和多长时间的敲击操作，需要对射术炉中熔融金属水平的准确了解。另外，从炉子侧壁测量的熔融金属的接近度可以提供剩余的难治壁的估计，这是炉子长期结构完整性的重要规模。这项工作将集中在开发新型电磁场传感系统的挑战上，该系统可用于远程监测射量耐冶金炉内熔融金属的水平和接近。 现有的，可商购的检查系统目前尚未解决此功能。该项目使用的技术将是基于涡流的电流，该技术证明了其在较大距离进行各种应用（例如金属检测）进行检查的能力。该建议是我们使用基于涡流的技术的先前实验工作的扩展，该技术证明了检测熔融金属水平与对金属接近度的敏感性在模拟的Pyrometalurgical熔炉条件下的可行性。这项工作阶段的主要重点是解决分离并报告两个关键所需过程参数（金属水平和金属距离）与测量的涡流信号所需的信号处理。遵循第一阶段使用的方法，该工作将涉及计算机建模和测试，并在实验室环境中使用实际线圈进行测试。最终的目标是在实际炉子中构建用于测试的原型。这将需要优化参数，例如线圈几何形状，线圈间距和熔融金属浴的初始距离。此外，还有其他参数可以影响测量值，例如高温，其他金属导体的接近度以及实际炉中的背景噪声，需要探索。