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Please review air separation applications for air sep plants located on-site of a steel manufacturing facility.
Blast furnace

Pig Iron Production
Upper portion of furnace / stack
(Hot reducing atmosphere)
aka - "Top Gas"
Percent CO & CO2 0-40% N2, H2, O2, H2Ov 7500Z (Dual bench)
Percent H2 0-20% N2, CO / CO2, H2Ov 2000A
Percent O2 0-2, 0-5% Series 3000P
Basic oxygen furnace - BOF
Top Blown Furnace
Oxidation of carbon in molten Pig Iron via addition of high purity O2 + steel making flux
Analysis point = duct above hood
Percent CO & CO2 0-40% N2, H2, O2, H2Ov 7500Z (Dual bench)
Percent H2 0-10% 2000A
Percent O2 0-5% Series 3000PB
Soaking pits Combustion efficiency Percent O2, CO, combustibles See Max 5 and 9000 series data sheets Flue gas Max 5 / Series 9000
Reheat furnace
Steam boilers
Galvinizing furnace
Coke oven
for Benzene emissions control
Coke plant storage tanks & coke oven gas before electrostatic precipitator Percent O2

(for Benzene emissions control)
0-2, 0-10% Coke oven gas 3020P
Coke oven flues Percent O2 and combustibles 0-5% O2, Percent LEL Coke oven flues Max 5 / 9700
Heat treating / annealing furnace Hydrogen / N2 blanketing for colored oxide prevention PPM O2 0-10 ppm or less H2 / N2 Series 3000T / 311 for spot checking
Percent H2 0-5, 10, 20% H2 N2 Series 2000
Hot strip mill High temp furnace (1400C)
O2 detection to prevent brittlement of steel slabs
Percent O2 0-5. 0-10% N2, H2Ov, CO2 9060Z extractive high temp probe and sample chamber with eductor
Dust collection system / baghouses - airleak detection Percent O2 and/or CO 0-5% O2 Air + dust from BOF, coke oven Series 9000
0-2000 ppm CO 7500Z NDIR
Continuous caster On the caster or tundish

Prevent slag oxidation of steel
PPM O2 0-10, 0-100 ppm N2 / Ar blanketing 3000TA / 311
Direct reduced iron Multiple locations in plant O2 / H2 / CO / CO2 PPM and Percent levels Process / Flue gas 3000 / 2000 / 7500Z

Applications by industry - Petrochemical | Oil and Gas | Air Separation
Power Generation | Cement | Refining | Food and Beverage | Pharmaceutical
Steel | Pulp and Paper | Semiconductor | Various

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