Metal Processing and Treatment Furnaces - Oxygen Analyzers

Latest metallurgical processes are dependent on controlled atmospheres to have either reactive or protective effects on the metals under treatment. During the combustion control of a furnace, monitoring of oxygen levels improves the efficiency and denotes the oxidizing potential of a controlled atmosphere. Excess oxygen can lead to decreased product quality or degradation of the product properties, for instance, through oxidation. Due to this reason, the final product cannot be sold at the desired price or must be scrapped.

  • A number of processes in the metals industry must be performed under an inert atmosphere to avoid oxidation
  • Brazing furnaces, for example, components for the car industry
  • Heat treatment, annealing furnaces
  • Solder paste manufacture
  • Metal powder production and processes

Metal Processing and Treatment Furnaces

Blanket Gas Quality

Application/Service Measurement Gas Stream Suggested Analyzer
Pure O2 generated cryogenically, pressure swing adsorption (PSA) and vacuum pressure swing adsorption (VPSA) processes mounted on skids replace air to enrich existing processes and boost product yield and reduce NOx emissions
  • zinc recovery processes
  • gold leaching processes
  • various brazing processes
  • processing scrap aluminum
  • improve heat transfer in electric-arc steel-making furnaces
30% to 100% O2 Varies GPR-3100
GPR-2600
GPR-2900

Spot Checking
GPR-3500 MO
GPR-2000

Furnace Fuel Gas Quality

Application/Service Measurement Gas Stream Suggested Analyzer
Control oxygen purity of furnace fuel gas for sintering metal powders into shapes and desired strength <1 ppm O2 N2, H2 PI2-MS 500/1000
GPR-1900 MS
GPR-1600

Spot Checking
GPR-1200 MS
GPR-1200

Heat Treatment Process

Application/Service Measurement Gas Stream Suggested Analyzer
Measurement of low ppm O2 for purity of H2 for heat treating, reducing and annealing finishing process to produce desired hardness and brightness:
  • Brazing
  • Metallizing
  • Annealing
  • Degassing
0-10 ppm O2 H2, N2 GPR-1600

Spot Checking
GPR-1200
GPR-1100

Simple, Reliable Oxygen Analyzers for Steel Production

Oxygen is essential for manufacturing steel and is employed in all furnace types and processes. The robust and user-friendly oxygen analyzers available from Analytical Industries are extensively used in steel mills worldwide.

Oxygen Analyzers for Steel Production

Coke Plants

Application/Service Measurement Gas Stream Suggested Analyzer
Percent level monitoring of O2 of coke plant storage tanks and coke oven gas before electrostatic precipator. 0 to 5% and 0 to 10% O2 Oven Gas GPR-2000

Application/Service Measurement Gas Stream Suggested Analyzer
Membrane air separator N2 skids 0.1% to 5% O2 Air GPR-2900

Gas Purity for Heat Transfer

Application/Service Measurement Gas Stream Suggested Analyzer
Cryogenic or PSA and VPSA skid generated oxygen to improve heat transfer in electric-arc steel making furnaces to increase the yield and reduce NOx emissions. 50% to 95% O2 Air GPR-3100
GPR-2600
GPR-2900

Spot Checking
GPR-3500 MO

Gas Quality for Heat Treatment

Application/Service Measurement Gas Stream Suggested Analyzer
Low ppm purity H2 for heat treating and annealing processes producing desired hardness and brightness 0-10 ppm O2 H2, N2 GPR-1600

Spot Checking
GPR-1200
GPR-1100

Slag Oxidation Prevention

Application/Service Measurement Gas Stream Suggested Analyzer
Measurement of ppm level N2/Ar inert blanketing to prevent slag oxidation on steel on the caster of tundish 0 to 10 ppm O2 N2/Ar GPR-1600

Spot Checking
GPR-1200
GPR-1100

This information has been sourced, reviewed and adapted from materials provided by Analytical Industries Inc.

For more information on this source, please visit Analytical Industries Inc.

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