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IRON & STEEL
Our experiences from carrying out several projects in the Iron and Steel industry, has given us in-depth knowledge in the workings of Blast Furnaces, Hot Blast Stoves, Vacuum Degasser Heat-up, Ladles Pre-heating, Sintering Hood Dry-out, Tundish Dry-outs, Torpedoes, Sinter Plants, Soaking Pits, Billet and Slab Re-Heat Furnaces, Cowper Stoves and Slag Runners.
BLAST FURNACE SERVICES
We provide the following services for the Blast Furnace Complex:
Complete Blast Furnace Dry-out & Pre-heating
Refractory Dry-out & Pre-heating of Stoves
Holding the Stoves at Hot Conditions
Hot Blast Main, Bustle Pipe Dry-out
Slag Runner Dry-out
BLAST FURNACE HEAT-UP
Blast Furnaces need to be pre-heated in order to ensure there is good heat penetration through the fairly thick refractories of the hearth region. By embedding the HAL System around 2 ft. below the refractory's hearth, it is possible to reach temperatures of 100°C and upward, with a furnace temperature of more than 550°C, and ensuring a thorough initial dry-out.
Depending on the size of the furnace, HAL High Velocity Burners are placed at the tuyere level (and by temporarily removing the appropriate number of tuyere stocks). Most often, around 50% of the burners are angled upwards, while the remaining burners fire down the hearth.
Our expertise has led us to occasionally perform a coordinated dry-out of the Stoves, Blast Furnace, Hot Blast Main and Bustle Pipe. The firing up of individual heating cycles is staggered, to ensure that all units are at the appropriate temperature, when the plant operations resume.
HOT BLAST STOVES (TOP / BOTTOM FIRING)
Our expertise lies in being able to provide carefully controlled heating of Hot Blast Stoves, especially where silica materials are involved, while doing our best to achieve a satisfactorily lengthy campaign life.
Often, the initial heating process can take up to 2-3 weeks and this is where the HAL High Velocity Burners System is crucial, as it provides excellent temperature control, while its safe heat-up is competently carried out. We impose a restriction on the gases being exhausted below the checkers, usually in the range of 300°C and the natural heat absorbing properties of the checkers is sufficient in enabling this restriction to be met, even when temperatures soar up to 1000-1200°C at the Dome.
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