Iron And Steel Furnaces; Iron & Steel Heating Furnace - YOKOGAWA EXAxt ZR22G Technical Information

4.2

Iron and Steel Furnaces

(1) Iron & steel heating furnace
These furnaces are for the heating of steel slabs, and generally the measured gas is at a high
temperature of 1000°C or above. The oxygen concentration is controlled to a low level to prevent
oxidation of the slabs. These are also some cases in which there is some amount of CO in the
gas, and in which magnetic oxygen analyzers or infrared type CO analyzers are used.
Sample point
Preheat zone, heating zone,
soaking zone
Hot Air Emission
Stack
Furnace Pressure Damper
DF
GL
Induced Draft Fan
Suction Damper
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System type
H2, H3
FCV
To Each Zone
Charging
Door
Charging
Machine
Recuperator
B
Delivery Damper
Blower
Iron & steel heating furnace
Detector
D5
N
2
Thinning-out
Valve
FCV
Shutoff Valve
PCV Throttle Valve
To Burner
Heating
Preheat
Zone
Zone
Slabs
M
Walking Beam Skid
Gas temperature: 900 to 1400°C
Gas pressure: 0.03 to 0.05 kPa
Dust: Minute
Fuel: Gas
<4. Applications>
Objective
Combustion monitoring
PCV
N
2
To Each
Zone
FCV
Soaking
Zone
Discharge Door
Extractor
M
Hydraulic Pressure
TI 11M12A01-01E
4-5
Fuel
(Mixed
Gas)
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Mar. 14, 2017-00