SDS – Slag Detection System

The Slag Detection System (SDS) is the proven solution for accurate and timely detection of slag carryover in the steelmaking process, allowing plants to improve product quality, reduce slag carryover and improve operator safety.


With over 60 years of application expertise in the steel industry, AMETEK Land’s Slag Detection System (SDS) delivers improved yields, higher-quality steel and reduces costly downstream processing. There are additional benefits in reduced ladle refractory wear.

At the end of the tap the levels of slag and steel rapidly reverse. Quick termination of the tap after the alarm has been triggered is necessary to prevent excessive levels of slag in the ladle. SDS uses a high-resolution thermal imaging camera to detect the transition between steel and slag. The dedicated thermal imaging camera has a specific design to survive in the harsh operating conditions and utilizes a particular wavelength to reduce “blackouts” caused by smoke and fume. Data is presented to the operator in real time enabling them to make informed decisions about the tapping process.

Suitable for operators of secondary steel making vessels (e.g. EAF, BOF) including stainless steel. Variants of the system are also available for copperplatinum, upon request. The system can also be used to indicate freeboard height if required.

Using the SDS has been demonstrated to improve operator response time and consistency at the end of each tap. This results in a typical reduction in slag depths of up to 25% compared to traditional methods of stream monitoring.

The cost of additional downstream processing time and materials can be a significant burden on an operating plant. By controlling slag carry-over this costly downstream processing can be reduced or eliminated, improving plant throughput and operating margins.

As the tap commences, the application dedicated software records it, using a stream identification algorithm, producing a data log and graph for quality control. A stream tracking mechanism is included to ensure reliable operation in typical installation conditions. When slag appears, and exceeds an operator defined amount, an alarm is automatically triggers. The system is designed to ensure accurate detection of steel/slag independent of charge weight and without operator intervention.

The Slag Detection System is AMETEK Land’s definitive solution for monitoring and reducing slag carryover in steel production facilities. It is proven to reduce slag carryover, save money and improve operator safety. 

Extra Informatie


Datasheet SDS Slag Detection System
Article Steel Times International – Improving Slag Detection


Website AMETEK Land – SDS Slag Detection System




Measurement Range: 800 to 1800 °C / 1472 to 3272°F
Image Resolution: 640 x 480 pixels
Spectral Response: 3.9 μm (centre)
Frame Rate: 50 frames/sec
Detector: Microbolometer Focal Plane Array
Optics: Standard – 12° (horizontal) x 9° (vertical)
Focus Range: 4 m / 13.1 ft to infinity
Protection Window: Sapphire (available as a spare part)
Accuracy: ±2% of measured value
Temperature Resolution: 0.5 °C / 32.9 oF (800 °C / 1472 oF blackbody temperature)
Enclosure: Water cooling and air purged enclosure with heat protection shield
Sighting Tube: Design significantly reduces the risk of direct impact of liquid steel/metal against the field
(sapphire protection window included)
Dimensions: 560 x 215 x 235 mm / 22 x 8.5 x 9.3 in.
Weight: 10 kg / 22.05 lbs.
Environmental Rating: IP 65
Connection: Local connection interface between camera unit and image processing system
Services: Water, instrument air, power input, located to the rear of the enclosure
Components: Power supply, Ethernet communications (switch)
PSU – Environmental Rating: NEMA Type 4
Size: 380 x 380 x 211 mm / 15 x 15 x 8.3 in.
Weight: 15kg / 33.07 lbs.
Connections: Light fiber data connection as an option
Slag/Steel Detection: Alarm activation when a pre-set percentage of either slag or steel/metal detected within defined window
User Display: Front page information display and location identifier. External data displayed via interface input.
Automatic Functions: Auto tap detection, stream tracking, steel/slag ratio, thermal video and video file recording, log file of all data including tap number, clear display of steel/slag percentage (bars, numbers and graphs), alarm colours, etc.)
Software: IMAGEPro-SDS – Advanced Image Processing and Application Software
Interfacing: Open Data Interface, Modbus TCP, Moxa I/O unit