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 |
7500 (Dual bench) |
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 |
7500 (Dual bench) |
| Soaking pits |
Combustion efficiency |
Percent O2, CO, combustibles |
See Max 5 and 9000 series data sheets |
Flue gas |
Max 5 / Series 9000 |
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 |
| 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 |
| Hot strip mill |
High temp furnace (1400C)
O2 detection to prevent brittlement of steel slabs |
Percent O2 |
0-5. 0-10% |
N2, H2Ov, CO2 |
9060 extractive high temp probe and sample chamber with eductor |
| 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 / 7500 |