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LAND have supplied the Steel industry throughout the world with temperature measuring equipment for 60 years. LAND manufacture a complete range of measurement equipment designed specifically for hot metal rolling applications. All are designed to the highest standards of quality and reliability to ensure accurate measurements in the harsh operating conditions of the hot mill.

The schematic diagrams illustrate typical features of a hot rolling mills. The areas highlighted show measurement reference points, where LAND's infrared thermometry know-how can really benefit you. If your specific area of concern is not covered here, our engineers will be pleased to discuss your requirements with you.

If you would like more detailed product information please use the Literature Request page.
 
 
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Last Modified (25/03/04) 1106KB
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Stage 1 Stage 2 Stage 3
Hot Rolling Mill Stage 1 Stage 2 Stage 3
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Stage 1
Hot Rolling Mill - Stage 1 Soaking Pit - Load Temperature Slabbing/Blooming Mill - Billet Temperature Measurement Continuous Caster - Strand Temperature Measurement in the Spray Chamber Continuous Caster - Withdrawal/Straightening and Exit
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Top of page1 - Continuous Caster - Strand Temperature Measurement in the Spray Chamber
Strand Temperature Measurement   A very special thermometer is needed here to survive the hostile environment of the spray chamber without constant maintenance. Measurements using the Land Spray Chamber System allow cooling rates in the chamber to be optimised, directly influencing both product quality and process efficiency.

bullet Permits process/quality optimization
bullet Avoids break-outs

Recommended System:- Spray Chamber System - refer to LAND


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Top of page2 - Continuous Caster - Withdrawal/Straightening and Exit
Withdrawal/Straightening and Exit   Measurement at the withdrawal/straightening section or exit monitors process uniformity over several strands. Measurements made here can provide vital information on final stage cooling in the spray chamber to ensure uniformity.
Installing an on-line thermometer systems or Landscan linescanners here would:

bullet Provide information on cooling in the Spray Chamber
bullet Check temperature profile of the hot strand

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Portable infrared thermometer Cyclops 100

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Top of page3 - Soaking Pit - Load Temperature
Load Temperature

  The heating of the soaking pit is controlled using temperature measurements made at the end wall. Knowledge of the pit temperature and necessary soaking times can ensure that ingots leave the soaking pit at the correct temperature.

A Cyclops 100 portable thermometer can be used to periodically check both pit and ingot temperatures.

Recommended Systems:-
On-line infrared thermometer System 4 - M1
Portable infrared thermometer Cyclops 100

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Top of page4 - Slabbing/Blooming Mill - Billet Temperature Measurement
Billet Temperature Measurement   Temperature measurement at the exit of the mill is important. If the billet is too cold it needs to be put through the reheat furnace before entering the rolling section, otherwise a product with poor surface condition and unacceptable metallurgical properties could result. Continuous monitoring with a short wavelength thermometer will:

bullet Provide ingot to billet temperature loss information
bullet Give early warning of possible roll damage

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Portable infrared thermometer Cyclops 100

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Stage 2
Hot Rolling Mill - Stage 2 Reheat Furnace Charge Reheat Furnace - Load Temperature Measurement Reheat Furnace Exit Rolling Mill - Measurement at the Scalebreaker Rolling Mill - Measurement at the Roughing Stands Rolling Mill - Coiler Temperature Measurement - Hot Coil Box
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Top of page5 - Reheat Furnace Charge
Reheat Furnace Charge

  Temperature measurement of the furnace charge allows adjustment of the furnace firing conditions in the pre-heat zone. Utilising a longer wavelength thermometer will help maximise reheating efficiency by providing an accurate temperature measurement when either hot and cold charging.

Recommended System:-
On-line infrared thermometer System 4 - M8
Portable Infrared thermometer Cyclops 100

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Top of page6 - Reheat Furnace - Load Temperature Measurement
Load Temperature Measurement   Two sensors are used to determine true Reheat Furnace Load temperatures. A radiation thermometer, operating at 3.9µm measures apparent load temperature and a furnace thermocouple or second 3.9µm thermometer is used to measure furnace temperature. These two signals are fed into a Signal processing unit which computes true load temperature.

The Furnace Thermometer System (FTS):

bullet Gives true stock temperatures, permitting optimised heating trajectories
bullet Provides potential for substantial energy savings
bullet Can be installed with the minimum process disruption

Recommended Systems:-
Furnace Thermometer System - FTS

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Top of page7 - Reheat Furnace Exit
Reheat Furnace Exit   The exit of the furnace represents the final opportunity to check the stock temperature before entering the mill.

Positioning a Landscan linescanner at the exit will determine temperature distribution i.e. poor uniformity will result in the need for burner adjustment. Landscan improves quality, reduces wastage of product, fuel and time.

A short wavelength thermometer with a Landmark Graphic signal processor using peak picking will give an accurate output avoiding errors due to surface scale. Used in conjunction with the charge and load measurements, it saves both time and fuel.

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Portable Infrared thermometer Cyclops 100

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Top of page8 - Rolling Mill - Measurement at the Scalebreaker
Measurement at the Scalebreaker


  This provides the first opportunity to measure the temperature of the scale-free metal. Once the scale has been removed, thermometers measure the true surface temperature to ensure it is within rolling limits and to set mill parameters.

Utilising a short wavelength thermometer with a peak picker signal processing option allows the true metal temperature to be passed to mill control equipment.

Using a Landscan linescanner at this point will provide a two dimensional thermal map of the product.

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Portable Infrared thermometer Cyclops 100

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9 - Rolling Mill - Measurement at the Roughing Stands
Measurement at the Roughing Stands   Measurements should be taken here at regular intervals to assist the operator in making the correct roll settings.
This is essential if there are any stoppages so that roll parameters can be adjusted.


Measurement at the Roughing Stands
bullet Using a Landscan linescanner at this point will provide a two dimensional thermal map of the product
   
Installation of a short wavelength thermometer:
bullet Gives an operator information or a mill computer data on which to set roll parameters
bullet Can in addition be used as a hot metal detector

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Portable Infrared thermometer Cyclops 100

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Top of page10 - Rolling Mill - Coiler Temperature Measurement - Hot Coil Box
Coiler Temperature Measurement

  Measurement of the strip, using a short wavelength thermometer on a Landscan linescanner, as it is uncoiled ensures that consistent rolling and finishing temperatures are maintained.

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Portable Infrared thermometer Cyclops 100
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Stage 3
Hot Rolling Mill - Stage 3 Finishing Stands Temperature Measurement Finishing Stands Temperature Measurement Wire/Rod Mill - Measurement at the Water Box Temperature measurement at the Cooling Section Temperature measurement at the Cooling Section Understrip Measurement Rolling Mill - Temperature Measurement at the Down Coiler
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11 - Rolling Mill - Finishing Stands Temperature Measurement
Finishing Stands Temperature Measurement


  It is essential to know the temperature of the finished product to ensure that the correct metallurgical properties have been obtained. Installation of an on-line system or Landscan provides vital information to be transferred to the cooling sections.

Finishing Stands Temperature Measurement
Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Understrip Thermometer System - USTS
Portable Infrared thermometer Cyclops 100
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12 - Rolling Mill - Measurement at the Cooling Section
Measurement at the Cooling Section/Runout Table  
The thermal sensitivity of some metals means that monitoring must take place to avoid damage or stresses occurring.

It is therefore equally important to maintain high accuracy temperature measurements at the cooling section to benefit the overall quality of the finished product, and to realise the correct properties.
Measurement at the Cooling Section/Runout Table
bullet Installing a Landscan linescanner at the cooling exit ensures
  maintenance of product quality throughout the cooling cycle
bullet An Understrip Thermometer System USTS can be used to
  provide a centreline measurement of the underside of the
  strip on the runout table
Measurement at the Cooling Section/Runout Table
Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
Understrip Temperature Measurement System - USTS

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Top of page13 - Understrip Measurement
Understrip Measurement

  Where there is a requirement for direct rolling of high performance 'dual phase' steels for crash energy-absorbing automotive components, use of an Under Strip Thermometer Systems (USTS) utilising a M3 non contact radiation thermometer thermometer provides a high degree of confidence that the required structure is consistently achieved throughout each coil.

Recommended Systems:-
Understrip Temperature Measurement System - USTS
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Top of page14 - Wire/Rod Mill - Measurement at the Water Box
Measurement at the Water Box   Cooling here needs to be rapid but controlled to ensure metallurgical properties are retained. Insufficient cooling control would result in out of specification material, i.e. scrap or downgrade.

Installation of a Linescanning ratio or target-orbiting (T.O.) thermometer:
bullet Allows continuous measurement
bullet Provides control to the water spray coolers to retain metallurgical properties
bullet Permits a range of rod/bar diameters to be monitored

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M2
Target Orbiter Thermometer
On-line Infrared Thermometer system 4 - R4/R1

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Top of page15 - Rolling Mill - Temperature Measurement at the Down Coiler
Temperature Measurement at the Down Coiler

  Measurement prior to the down coiler using either a Landscan linescanner or short wavelength thermometer provides feedback on product temperatures for quality control data.

bullet A Landscan linescanner provides analog zone outputs for controlled cooling of
  the strip

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M2
On-line infrared thermometer System 4 - M6
Understrip Thermometer System - USTS
 
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Top of page16 - Wire/Rod Mill - Measurement at the Laying head and on the Air Cooling Conveyor
Measurement at the Laying head and on the Air Cooling Conveyor

  Temperature measurement using either Landscan linescanner, a ratio thermometer or a target-orbiting (T.O.) thermometer in the air cooling zones is vital to ensure both metallurgical structure and hence mechanical properties are retained in the finished product.

On-line measurement should be made in both the laying and cooling zones for effective control.

In addition Landscan linescanner provides:
bullet Complete two-dimensional thermal mapping of the laid products

A portable thermometer can be used to monitor laying head temperatures and cooling conveyor temperatures.

Recommended Systems:-
Infrared linescanning systems - Landscan
On-line infrared thermometer System 4 - M1
On-line infrared thermometer System 4 - M2
Target Orbiter Thermometer
Portable infrared thermometer Cyclops 100

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Top of pageCopyright © 2006 AMETEK Land, Inc.     All rights reserved     Infrared Site Map     Information updated: 23-Aug-2006