SDS - Slag Detection System

AMETEK Land Fixed Thermal Imagers and Line Scanners - 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.
  • Overview +

    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 copper, platinum, 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. 

  • Field of View (FOV) +

    Slag Detection System - Field of View
    Distance 4m  5m 7.5m  1m  15m 
      Width Height  FOV  Width  Height   FOV  Width  Height   FOV  Width  Height   FOV  Width  Height   FOV 
    12° x 9° 0.84m 0.63m  1.3mm   1.05m 0.78m  1.6mm  1.57m  1.18m  2.4mm  2.1m  1.57m  3.2mm  3.15m  2.36m  4.9mm 

  • Specifications +

    Image Processing Software
    Slag Detection: Alarm activation when a preset percentage of either slag or steel detected within defined window
    User Display: Front page information display, plant logo and location identifier
    Frame Rate:
    50 frames/sec
    Automatic Functions: Auto tap detection, stream identification, steel/slag ratio, video file, log file of all data, steel/slag percentage graph, all saved as tap number.
    Language: User defined
    Outputs: Digital output card, DDE, OLE, Ethernet and OPC Options
    Sensor Supply Unit
    Local connection interface between imaging sensor and image processing system
    Service:   Water, air, power input, communications, video, located to the rear of the enclosure
    Added Protection: Sacrificial plate protects the main enclosure from direct impact
    Sighting Tube: Design significantly reduces the risk of direct impact of liquid steel against the field replaceable sapphire window
    Air Bleed: Provides positive pressure within the enclosure
    Environmental Rating: IP65
    Thermal Imaging Sensor (SDS) 
    Measurement Range: 800 to 1800 °C / 1472 to 3272°F
    Image Resolution: 640 x 480 pixels
    Detector: Amorphous Silicon Focal Plane Array 
    Field of View: Standard - 12° (horizontal) x 9° (vertical) 
    Motorised Focusing Range: 4m / 13.1 ft to infinity 
    Temperature Resolution: 0.5 °C (for 800 °C blackbody) 
    Accuracy: ±2% absolute temperature (K) 
    Air Purge, Blower unit, Setup Monitor, Sensor Carry Case
    Spectral Response: 3.9 μm
  • Video +

  • Documentation +

  • Related Applications +

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