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Steel Applications
Applications
Basic oxygen furnace - BOF Top Blown Furnace
Service
Parameter(s)
Range(s)
Background
Model
Oxidation of carbon in molten Pic Iron via addition of high purity O
2
+ steel making flux
Analysis point = duct above hood
Percent CO & CO
2
Percent H2
Percent O2
0-40%
0-10%
0-5%
N
2
, H
2
, O
2
, H
2
Ov
7500ZA
/
2000A
/
3000PA
(Dual bench)
Blast Furnace
Service
Parameter(s)
Range(s)
Background
Model
Upper portion of furnace / stack (Hot reducing atmosphere) aka - "Top Gas"
Percent CO & CO
2
Percent H2
Percent O2
0-40%
0-20%
0-2, 0-5%
N
2
, H
2
, O
2
, H
2
Ov
N2, CO / CO2, H2Ov
N2, CO / CO2, H2Ov
7500ZA
/
2000A
/
3000PA
(Dual bench)
Coke Oven for Benzene emissions control
Service
Parameter(s)
Range(s)
Background
Model
Coke plant storage tanks & coke oven gas before electrostatic precipitator
Percent O
2
(for Benzene emissions control)
0-2, 0-10%
Coke oven gas
3020P
Continuous Caster
Service
Parameter(s)
Range(s)
Background
Model
On the caster or tundish
Prevent slag oxidation of steel
PPM O
2
0-10, 0-100 ppm
N
2
/ Ar blanketing
3000TA
/
3110
Direct reduced iron
Service
Parameter(s)
Range(s)
Background
Model
Multiple locations in plant
O
2
/ H
2
/ CO / CO
2
PPM and Percent Levels
Process / Flue gas
3000MA
/
2000A
/
7500ZA
Heat Treating / Annealing Furnace
Service
Parameter(s)
Range(s)
Background
Model
Hydrogen / N
2
blanketing for colored oxide prevention
PPM O
2
Percent H2
0-10 ppm or less
0-5, 10, 20% H2
H
2
/ N2
N2
3000TA
/
3110
/
2000A
(for spot checking)
Hot Strip Mill
Service
Parameter(s)
Range(s)
Background
Model
High temp furnace (1400°C)
O2 detection to prevent brittlement of steel slabs
Percent O
2
0-5, 0-10%
N
2
, H
2
Ov, CO
2
9060Z
extractive high temp probe and sample chamber with eductor
Dust collection system / baghouses - air leak detection
Percent O
2
and/or CO
0-2,000 ppm CO
Air + dust from BOF, coke oven
7500ZA