Iron & Steel

HAL have carried out numerous projects in the Iron and Steel industry in areas such as 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

HAL can provide the following services at blast furnace complex ­

  • Refractory Dry out & Preheating of stoves.
  • Holding the stoves at hot conditions
  • Hot Blast main, Bustle pipe Dry out
  • Slag runner Dry out
  • Blast Furnace Dry out

Blast Furnace Heat up

The initial Preheating of Blast furnaces is to ensure good heat penetration into the thick refractories of the hearth area, Using the HAL System refractories embedded some 2 ft. below the hearth have reached temperature of in excess of 100°C, with a furnace temperature of 550°C evidencing a thorough initial dry-out. Required quantity of HAL High Velocity Burners depending on the size of the furnace are located at the tuyer level (with an appropriate number of tuyer stocks being temporarily removed). Generally 50% of these burners will be angled upwards, and the remainder fired downwards the hearth.

On occasions HAL have performed a coordinated dry out of the stoves, the blast furnace and the hot blast main and bustle pipe. The startup of individual heating cycles is staggered so that all the units are at the appropriate temperature when the plant operations resume.

Hot Blast Stoves

HAL can provide a careful and gradual heat up of Hot Blast Stoves particularly where Silica materials are involved it is essential if the plant is to achieve a satisfactorily lengthy campaign life. The industry in general recognizes this fact, and often the initial heating process can take some 2 to 3 weeks. The HAL high velocity burners system provides excellent temperature control, and a heat up safely and competently carried out. Normally a restriction is place on the gases being exhausted below the checkers, usually in the range of 300°C. The natural heat absorbing properties of the checkers is sufficient to enable this restriction to be meet, even with temperatures of 1000°C to 1200°C at the dome. To hold 1000°C at Dome till BF Gas connected.

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