Thermal Imaging Ensures Continuous Steel Production

Production plants have to keep running all the time. No breakdown, no downtime. To ensure proper operation of its production plants in Vanderbijlpark, ArcelorMittal South Africa uses thermal imaging cameras. This improves efficiency, safety, helps avoid breakdowns and to minimize downtime.

Flir_Fig_1

Douglas Glen, Senior Thermographer at ArcelorMittal South Africa demonstrates the use of the Flir P640 thermal imaging camera.

The ArcelorMittal plant at Vanderbijlpark has the capacity to produce 4.4 million tonnes of liquid steel per year, which constitutes some 78 percent of South Africa’s flat steel requirements. It is one of the world’s largest inland steel mills and the biggest supplier of flat steel products in sub-Saharan Africa.

To keep all of the plant’s equipment up and running is the task of the Condition-Monitoring Team at the Reliability Engineering Department of ArcelorMittal South Africa. The team uses many condition monitoring tools, thermal imaging is one of them.

Flir_Fig_5

Glen and his colleague Pieterse use an iPod to compare new readings with earlier inspections, using the Flir Viewer Mobile App.

– The advantage of using thermal imaging cameras is that you can see a problem developing long before it becomes visible to the naked eye, enabling you to make informed decisions regarding a suitable course of action. This leads to increased production, improved safety and increased equipment lifespan, explains Douglas Glen, Senior Thermographer at the Condition-Monitoring Team.

The Advantage of Thermal Imaging

Thermal imaging technology is a perfect solution, according to Glen.

– You can perform thermal imaging inspections during operation and while electrical systems are under load. No downtime is required.

Of course thermal imaging is not the only condition-monitoring tool used at the plants of ArcelorMittal South Africa.

– We combine several technologies such as vibration analysis, oil analysis and inspections using thermal imaging cameras. The main advantage of thermal imaging is that you can locate mechanical and electrical problems very quickly and accurately. With thermal imaging you can immediately see which component is causing the problem.

Thermal imaging cameras also help speed up the inspections.

– Often there are simply too many pieces of equipment for vibration analysis or other methods. We monitor 13,168 electrical panels, 6 rotating kiln furnaces, two blast furnaces, one Basic Oxygen Furnace (BOF), three large arc furnaces and several furnaces of other types. That’s a lot of equipment. With our thermal imaging cameras we ensure that no fault is overlooked, while saving a lot of time, says Glen.

According to Glen some types of equipment can only be inspected using thermal imaging cameras.

– With refractory linings, for instance, thermal imaging cameras are the only practical condition-monitoring tool available. With a thermal imaging camera you can scan large areas of refractory material and immediately see where the refractory insulation is failing.

– Before we started using Flir thermal imaging cameras we already used cameras from other manufacturers, Glen explains.

– Over a decade ago we bought our first Flir thermal imaging camera, and it was immediately clear to us that Flir was the leader in the field. Since then we have bought several new thermal imaging cameras. All of these thermal imaging cameras see daily use and have proved to be extremely reliable.

ArcelorMittal South Africa acquired their thermal imaging camera from the Johannesburg, South Africa, based Flir products distributor Yellotec. As a solution-oriented company Yellotec specializes in industrial technologies. It has a long-standing history with Flir products going back almost 20 years. Yellotec can be considered to be the most experienced thermography related company in the country, because it employs the most experienced and knowledgeable personnel active in the South African Thermography market and its sales people are at least qualified to a minimum of Thermography Level 2.

Details of the Camera

The Flir P640 thermal imaging camera contains an uncooled microbolometer detector that produces excellent quality thermal images of 640 x 480 pixels at a thermal sensitivity of 30 mK (0.03 °C).

– One of the reasons why we chose this camera – apart from the excellent image quality and accuracy – is its ergonomic design, explains Glen.

– If you use a piece of equipment as often as we use the thermal imaging cameras, ergonomics and ease of use are crucial. This camera model delivers just that. Especially the tiltable viewfinder comes in handy, as it allows us to look at equipment from all possible angles.

Another reason for their choice in thermal imaging camera model was the fact that it has interchangeable optics.

Flir_Fig_4a
Flir_Fig_4b

These images form part of a weekly inspection done on six Direct Reduction Iron (DRI). The images are analysed to detect refractory degradation or product build-up on the inside.

– This is very important for us because we also perform high voltage inspections of overhead power lines, both for our own premises and for the local municipality. For those long distance inspections a 7° angle telephoto lens is indispensible. In other situations the standard 24° lens is needed, for the telephoto lens simply has a too narrow field of view. The ability to change the lens gives the operator much more flexibility.

To facilitate comparison between new recordings and previous reports the condition monitoring personnel also has an iPod Touch attached to the left arm.

Flir_Fig_2

This thermal image of a high voltage capacitor shows a hot spot indicating a faulty or high resistance connection.

– This allows us to look up previous reports so we can immediately see if anything has changed. This helps us to quickly and accurately spot defects. The added benefit of the Flir Viewer Mobile App that we downloaded from the Apple Store is proving to be invaluable. Using the iPod Touch together with our thermal imaging cameras has enabled us to increase our efficiency by about 30 percent.

Training Is Important

The ergonomic design and ease of use of thermal imaging cameras can also be slightly deceptive, however, according to Glen.

– The thermal imaging cameras are so easy to use that you might think it’s just a matter of point and click, but it is essential that you know what you are doing. You need extensive knowledge of thermal physics and thermal imaging technology to accurately analyse thermal images. Otherwise you will likely draw false conclusions.

That is why Glen and his colleagues opted for training at the Infrared Training Center (ITC).

– All of our operators are ITC trained. I have a level 3 certificate, which is currently the highest level, and my colleague Nico Pieterse has the level 2 certificate.

With their thermal imaging cameras Glen and his team have helped ensure the continuity of production at the plants of ArcelorMittal South Africa, saving their company a lot of money in the process.

 

 

Heijsman_Ruud_Flir

Ruud Heijsman

Flir,

ruud.heijsman@flir.com

Cmms | 20.3.2016

Latest articles

AMS Device Manager software adds support for the Beamex MC6 documenting calibrator, simplifying compliance

Emerson has updated AMS Device Manager asset management software to support the Beamex MC6 documenting calibrator, adding electronic workflows that eliminate up to 50 percent of time spent on each calibration.

Applications | 16.5.2018

Caverion to be in Charge of the Monitoring and Maintenance of the Second-largest Open Data Centre in the Nordics

Caverion and Telia Finland have signed a contract covering the control room operator services and property maintenance of the new Telia Helsinki Data Center. The open data centre to be built in the Pitäjänmäki district in Helsinki will be the most secure, energy efficient and environment-friendly data centre in the Nordic countries.

Asset Management | 11.5.2018

EU Agency for Safety and Health at Work Launches Europe-Wide Awareness-Raising Campaign on Dangerous Substances

The European Agency for Safety and Health at Work (EU-OSHA) has launched its 2018-19 EU-wide campaign, Healthy Workplaces Manage Dangerous Substances.

HSE | 25.4.2018

Ensuring a Smooth Transition from OPC CLASSIC to OPC UA

Now, more than ever, industrial firms need to make sense of vast quantities of data having a critical impact on their performance. To support the variety of applications necessary today, information must be delivered with context so it can be understood and used in various ways by a variety of people. Growing adoption of the Industrial Internet of Things (IIoT) and Industrie 4.0 is also driving requirements for open and secure connectivity between devices and edge-to-cloud solutions.

Cmms | 30.3.2018

Is Your HMI/SCADA Network as Secure as You Think It Is?

Network security frequently makes the news, often when some new viral attack is discovered or, worse yet, is successful. HMI/SCADA networks can be as susceptible to these unlawful break-ins as any others, unless the proper precautions are taken. Many software and hardware vendors have made their own attempts to stay ahead of online criminals, while others have combined forces to thwart such attacks.

Partner Articles | 30.3.2018

Examples: Using Ultrasound and Infrared for Electrical Inspections

Ultrasound and infrared technologies are a perfect match when conducting inspections of electrical equipment. At any voltage, thermal anomalies and sources of ultrasound such as tracking and arcing can occur. Corona can also occur at 1000 volts and greater. Any of these conditions threaten the reliability of the equipment being inspected.

R&D | 29.3.2018

Maintenance: A Necessary and Important Function in the Future

Euromaintenance 2016 will take place in Athens at the end of May. It is the ideal moment to reflect on maintenance in a European context. Euromaintenance is known as the summit for all involved in maintenance across Europe, it’s the place to be. The conference, with the support of the EFNMS, is the only commercially independent conference covering the topics we deal with in the maintenance world.

EFNMS | 20.5.2016