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Blast furnace
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Monitoring the charging of the blast furnace
To make sure the batch and the coke layer are distributed as optimally as possible, a measurement of the level is required. Because of the extremely harsh operating conditions in the blast furnace, heavy mechanical plumb line systems were often used previously. These had massive weights on chains that were lowered down onto the filling surface, thus measuring the distance. Modern radar sensors like VEGAPULS 68 solve this measurement problem much more elegantly.
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Level measurement with VEGAPULS 68
Unaffected by dust, material compositions and high temperatures, VEGAPULS 68 delivers important information on the charging process in the blast furnace. Depending on the size of the sensor antenna, either broad areas or limited spots on the surface can be covered. Through the use of several sensors, the surface profile in the blast furnace can be systematically analysed. The radar instruments do not affect one another in the process. Thanks to its robust construction VEGAPULS 68 easily withstands the tough requiremens of the blast furnace environment. Moreover, by mounting the sensor on a suitable slide valve, it can be separated from the process anytime during operation.
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Tapping the blast furnace
After the blast furnace has been tapped, the raw iron flows into pan or torpedo cars and is taken to the foundry or to the converter for further processing. Measuring the contents of the steel pans certainly belongs to the most difficult measurement tasks in the steelworks. The very high temperatures of over 1400 °C (2552 °F) and the extreme dust and steam generation during the filling process place heavy demands on the sensors. Understandably, only a contactless measuring technique can perform this task.
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Level measurement in the steel pan with VEGAPULS 62
Since microwaves are not impaired by extremely high temperatures, VEGAPULS 62 is particularly well suited for this measurement task. Due to its high measuring rate and precision, it measures the contents of the steel pans with to take place even through the relatively small openings in the torpedo car, even during filling. A rinsing air connection makes sure that the antenna system stays clean during the intense shower of sparks and generation of dust that occurs when the pan is filled. Under cramped conditions, angled antenna extensions allow the sensors to be optimally located and the electronics mounted in protected surroundings.
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VEGAPULS 68
- non-contact
measurement
- easy set-up
- wear- and
maintenance-free
- process temperatures
up to +200 °C
(+392 °F)
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VEGAPULS 62
- non-contact
measurement
- high accuracy
- fast measuring rate
- wear- and
maintenance-free
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Australia
