Hüttenwerke Krupp Mannesmann (Duisburg) employs a total of 60 Optiflux electromagnetic flowmeters from Krohne to measure flow rate differences in the cooling water circuit of its blast furnace B. The aim is to detect leaks at the blast furnace tuyères* as early as possible. These nozzles are arranged in a ring in the wall of the blast furnace and blow hot wind at a temperature of 1300°C into the furnace for the reduction process. Each of the tuyères comprises two chambers and has a water cooling system to prevent damage being caused by the hot melt that would result in leaks. Such leaks inevitably lead to water entering the blast furnace, with a deterioration in the quality of the steel at best, and an oxyhydrogen gas explosion that can destroy the furnace at worst.
Differential flow measurements are generally difficult because the water volume to be measured lies in the range of the measuring uncertainty. At HKM, an alarm should already be triggered at 0,4% of the full-scale range in order to minimise the water inlet into the blast furnace.
In order to achieve this goal, two Optifluxes were calibrated together so that the flowmeters can detect the admission of even minimal amounts of water into the blast furnace. Two jointly calibrated flowmeters then monitor each tuyère and trigger an alarm as soon as the limit value of 0,4% of the full-scale range is exceeded. HKM is thus able to shut down defective tuyères and avoid costly standstills of the plant that could otherwise be caused by water damage.
*A tuyère is a pipe, nozzle, or other opening through which air is forced into a blast furnace or forge to facilitate combustion.
For more information contact Kruben Bennie, Krohne, 011 315 2685.
New uncompromisingly simple flowmeter line for processes Endress+Hauser South Africa
Flow Measurement & Control
The demand for simplicity in commissioning, operation and maintenance in industrial process plants has increased significantly in recent years. The new Proline 10 range of flowmeters from Endress+Hauser meets this requirement without compromise, because simplicity is the top priority.
Read more...Loop signature 29: Averaging or surge level control
Editor's Choice Flow Measurement & Control
There are many processes where it is undesirable for the load to suddenly change quickly, for example in the paper industry. Examples of level control have involved reasonably fast tuning. An example of a level loop tuned this way and responding to a step change in setpoint is given.
Read more...Uncompromising flow rate measurement Burkert South Africa
Flow Measurement & Control
Bürkert’s FLOWave is a hygienic and safe flow measurement solution with many benefits for pharmaceutical or food production processes.
Read more...Electromagnetic flow measurement Siemens South Africa
Flow Measurement & Control
The SITRANS FM electromagnetic flowmeters from Siemens deliver high-precision volume measurement of electrically conductive liquid applications – from water, wastewater and irrigation to hygienic processes and even mining slurries with magnetic particles.
Read more...ABB unveils next generation of electromagnetic flowmeters ABB South Africa
Flow Measurement & Control
ABB has launched its latest generation of electromagnetic flowmeters, bringing unmatched accuracy, connectivity and flexibility to industrial and utility applications.
Read more...Precision measurement for ultra-pure water systems
Flow Measurement & Control
[Sponsored] Ultra-pure water (UPW) is essential in industries where even minor contaminants can impact product quality and process integrity. Anton Paar’s L-Cor Coriolis mass flowmeters provide a highly accurate and hygienic solution by directly measuring the mass of the liquid using the Coriolis effect, ensuring a high level of cleanliness.
Read more...Inline process solutions for gold mining Anton Paar
Flow Measurement & Control
[Sponsored]The extraction and processing of gold ore requires precision and efficiency to maximise yield and minimise losses. Automation and continuous monitoring of critical process steps are essential to ensure optimal production. Anton Paar offers advanced inline measurement solutions which enable full automation and real-time monitoring of key steps in gold extraction and processing.
Read more...Magnetic-inductive flow sensor ifm - South Africa
Flow Measurement & Control
The SMF magnetic-inductive flow sensor revolutionises liquid and creamy flow measurement. With IO-Link, it enables digital data transmission, eliminating blind spots in production.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version