Steel Melting Plants Fumes

Dust and Removing Elements

SCCM ALP designs installations and equipment for the capture/cooling of fumes and dust generated by steel melting, conversion and refining processes.

Post Combustion Chamber

The post-combustion chambre ensures the heat treatment of the fumes captured on the arc furnace by oxidation of the combustible fraction of these fumes (CO and H2).

In addition to this primary function, the post-combustion chambre collects part of the dust in the lower part, at the level of a hopper or sedimentation chambre.

In the principle and to guarantee the efficiency of the afterburning of the unburnt material, it is necessary to be able to guarantee :

  • Sufficient turbulence to ensure an intimate mixing of the unburnt material with the combustion air.
  • A minimum temperature in the range of 850-900°C
  • Sufficient residence time to ensure complete combustion

In addition, the quantity of air introduced for combustion must be sufficient to guarantee a minimum oxygen level of 6% at the outlet of the afterburner chambre.

The high-temperature and highly turbulent reactive flow necessarily generates significant thermal loads which must be taken into account in the design.

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Our Achievements

ARCELORMITTAL
Product :
Post-combustion chambre
Issue :
Facilitate maintenance and replacement operations of the components of the afterburner chamber + Increase service life
Solution :
Monobloc design consisting of 3 stackable elements, Increase in depth + 1000mm, Increase in post-combustion volume +36%, Tubes arranged horizontally without high point, Passage to the test bench + circuit instrumentation (PT100 probes) for performance monitoring after commissioning.
Market :
Steel industry
APERAM
Product :
Post-combustion chambre
Issue :
2 old furnaces operate alternately and use steel mill dust to extract noble metals (nickel, chromium, etc.), Large dust deposits at the first fixed bend, Stoppages imposed by these deposits which require regular interventions to extract these dusts, Significant wear of the tubes of the two fixed bends, Problem of efficiency and reliability of the dust evacuation system in the lower part of the post-combustion chambre
Solution :
Design of a new vertical post-combustion chambre placed as close as possible to the furnace in order to avoid zones of deposits, Increase in depth + 1000 mm, Increase in post-combustion volume +36%, Tubes arranged horizontally without high point, Passage to the test bench + circuit instrumentation (PT100 probes) for monitoring performance after commissioning
Market :
Steel industry

Water-cooled pipe

These elements are associated with the installations for collecting and dedusting steel production tools: arc furnace, ladle furnace, AOD, etc.

The geometry, dimensioning and design of these cooled tubular ducts are adapted according to the destination tool and the installation and operating constraints:

  • Fixed or mobile ducts
  • Design with optimized aeraulics to limit erosion and dust deposition phenomena
  • Circular, rectangular section, etc.
  • Change of section and direction
  • Pipe diameter and thickness depending on the intensity and combination of stresses: thermal load, erosion, corrosion
  • Definition of water circuits (number and length of circuits) adapted to the distribution of the thermal load
  • Consideration of the water flows and pressures available on site
  • Preventive surface treatment: Inconel arc-spray, Inconel hard facing, tungsten carbide hot spraying, etc.

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Our Achievements

Erasteel
Product :
Water-cooled pipe
Issue :
Poor distribution of the water circuits, problem of the “gap”.
Solution :
New installations that met the client’s expectations.
Market :
Steel Industry
Asco Industries
Product :
Water-cooled pipe
Issue :
Localised wear on the part
Solution :
Anti-wear coating installed + geometry optimisation
Market :
Steel Industry
ARCELORMITTAL
Product :
Water-cooled pipe
Issue :
New installations
Solution :
New installations that met the client’s expectations.
Market :
Steel Industry