To measure is to know
Metallurgical processes are characterised by liquid metal, high temperatures, large gas volumes, high gas speeds and a huge amount of dust in the gas. The big challenge in measurement technique and process control is to steer and control the process with great accuracy, no contact and in real time.
We possess far-reaching expertise in analysis and evaluation of metallurgical processes combined with advanced knowledge of the requirements in place for being able to measure and accurately analyse process data. In the work, different measurement methods are used based on optical spectroscopy, microwave spectroscopy, thermal analysis as well as extractive measurement methods. Knowledge of the process is combined with measurement technique and measured signal data must reflect what is happening in the process. From a production and process-technology perspective, this results in an increased material exchange, better utilisation of raw material and lower energy usage.
Measurement-technique challenges
- High temperature, often over 1500°C
- Large quantity of dust in furnace atmosphere and flue gas ducts
- Difficult to measure direct values, e.g. in blast furnace
- Covering oxide scale
- Aggressive environment
- Water mist
In these conditions, it is difficult to get a measuring sensor to survive for a long period of time. But non-contact measurement techniques make it possible to get around this. Because pyrometallurgical process give radiate light and/or heat, it is possible to directly and without contact measure what is going on in the process since the radiation carries the process information with it. Within optic spectroscopy in particular, there is a technique to signal-treat light radiation so that both the process temperature and the qualitative composition of the metal can be registered.
More information about Swerea MEFOS’ measurement equipment.