- Stove dome/hot blast stove is one of the most critical sections in the steel industry. The hot blast has 3 stage operations, either on gas, on blast or bottled up (ready and waiting to be put on blast). Temperature is one of the major parameters for controlling this critical process. They run up to a maximum operating temperature of 1450°C and high pressure. The high temperature and high pressure make the assembly very critical.
Stove Dome Thermocouple | 1450°C
- A hot blast stove manufacturer was experiencing longevity problems with their thermocouples. Aavad Instrument Pvt. Ltd. was called in to create a set of unique stove dome thermocouple temperature sensor designs, to help a client control the temperature of a coal injection process inside their stove furnaces.
Specifications
| Make | AAVAD |
| Type | S (Pt. Rh(10%)/Pt) |
| Model | ARFS-24×600 |
| Element Diameter | 0.40 mm |
| Configuration | Simplex |
| Calibration std. | As per ANSI mc 96.1 |
| Insulation | Twin hole ceramic Ker-710 |
| Hot junction | Un-grounded |
| Terminal block | Ceramic with nickel-plated brass terminals |
| Protection Head | Die-Cast aluminum flame-proof ANSI color-coded ‘Blue’ painted with threaded cover and chain |
| Protection class | IP67 |
| Cable entry | Single |
| Cable entry size | 1/2″ NPT (F) |
| Holding tube moc | SS310 |
| Holding tube OdxLength | 30×150 mm |
| Ceramic tube length | 450 mm |
| No. of protection | Double protection tube |
| Outer ceramic OdxId | 24×18 mm Of Ceramic Ker-710 |
| Inner ceramic OdxId | 15×10 mm of ceramic Ker-710 |
| Joints | Between holding tube & outer tube assembly by high temp. alumina compound bonding |
| Total length below head | 600 mm |
| Process connection | 2″ 300#RF Fix welded flange |
| Range | Up to 1450°C |
Key Features
- Quick & accurate measurements.
- Corrosion and scratch resistant.
- Excellent Performance.
- Customized option
Applications
- Stove operators all around the world are always trying to save money on coke, a material commonly used in combustion. Coal injection into furnaces can significantly reduce the amount of coke required, saving money on operation. In order for this process to work effectively, it must be carried out at an optimal temperature, which must be controlled by stove dome thermocouples.With the advancement of coal injection technology over the years, modern hot blast stoves are becoming more and more complex. They run up to a maximum operating temperature of 1450°C. Combusted gas is inside the application, this gas has to be released steadily, with minimal energy loss. Thick interlocking walls are designed to help withstand the pressure created by the gas.
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