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Temperature Monitoring of the Pusher Arm Wall using Ratio Pyrometer

Effectively maintaining temperature of the heating chambers in the coke oven battery is essential for high yield and optimum quality of the coke. The narrow width of the flue makes it challenging for the accurate measurement of the flue temperature using a portable pyrometer inside the pusher arm as the hot coke is pushed out of the oven. Successfully monitoring the temperature of the heating chambers also reduces risk of damage to the oven wall. 

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Temperature monitoring of the pusher arm wall

Home    Case Studies    Pilger mill in tube rolling mills – hot and cold pipe detection

Pilger mill in tube rolling mills - hot and cold pipe detection

  • Fibre optic based pyrometer installed inside the pusher arm to measure the temperature of coke oven walls profile as the hot coke is pushed out.  
  • Typically six numbers are fitted to pusher arm (three each side).

Ratio Technology

  • The 2-color ratio technology allows accurate and repeatable temperature measurements free from dependence on absolute radiated energy values. 2-color sensors measure closer to the highest temperature within the measured spot (spatial peak picking) instead of an average temperature. 

Customer Benefit

  • Increased quality: High quality metallurgical coke improves iron and steel making process.
  • High Coke Yield: Critical for good quality coke, the oven and heating chambers in coke oven battery are controlled.

Environmental conditions

  • Hot Strip Mill: Presence of steam, dust, dirt, clogged viewports
  • Bar Mill: Small diameter of bar that keeps fluttering
  • Hot metal casting or pouring: When target emissivity are low or changing by the same factor in both wavelength bands.
  • Installation Challenge
  • In high ambient temperature, water cooling is required and sensor is installed far away thus reducing the impact of IR energy received by the sensor.

Advantages

  • Able to look through dust and dirt and steam.
  • Only 5% FOV to be covered for accurate temperature.
  • Emissivity has less effect on Temperature measurement.
  • Optical sensor head can withstand 200°C (315°C on special request) without water cooling.
  • As the sensor can be mounted closer to the hot object thus improving the preciseness in temperature measurement.

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Advantages in harsh working environment