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Gases for Refining in Iron and Steel Production
Technologies include: removing contaminants with gases such
as oxygen and argon; using nitrogen as an inert carrier gas;
oxygen fuel (oxy-fuel) preheating and heating systems; stirring
using gases; and other industrial gases applications. These
offer significant financial benefits for refining and degassing
in the iron and steel production industry.
Offerings applicable to:
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 Argon
Oxygen Decarburisation (AOD) |
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Vacuum
Degassing |
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Ladle
Metallurgy |
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| Argon Oxygen Decarburisation
(AOD) - Argon and Oxygen Injection |
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Decarburisation by injecting argon and oxygen can be used
in the production of stainless steel. Air Products can supply
the gas, advanced flow and process control systems and technical
expertise (in, eg, positioning of lances).
Argon Oxygen Decarburisation (AOD) - Controls
Upgrade
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Air Products has installed and upgraded flow and process
controls in Argon Oxygen Decarburisation vessels to increase
the repeatability, accuracy and efficiency of gas usage.
Argon Oxygen Decarburisation (AOD) - Vessel
Preheating
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| Complete burner and control packages have been
developed to efficiently preheat AOD vessels using non-water-cooled
oxy-fuel burners. 70% fuel savings and 50% reductions in heat-up
rates are typical. |
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Vacuum Degassing - Decarburisation with
Oxygen
Vacuum Degassing - Lifting
Vacuum Degassing - Purging
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| Ladle Metallurgy - Preheating |
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Complete burner and control packages have been developed
to efficiently preheat ladles using non-water-cooled oxy-fuel
burners. 70% fuel savings and 50% reductions in heat-up rates
are typical.
Ladle Metallurgy - REHeat® heating
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Our patented technology (with Bethlehem Steel) for chemically
reheating steel by simultaneous injection of fuel (aluminium
and silicon) and oxygen achieves temperature gains of 5 to
8°C/min. Subsequent stirring with inert gas ensures that
steel cleanliness is not adversely affected. This technique
is used to reheat cold ladles of metal to avoid expensive
pourbacks and subsequent casting interruptions.
Ladle Metallurgy - Stirring
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Gas injection to stir molten metal improves homogeneity of
both alloy composition and temperature. This increases yield,
decreases alloy requirement, reduces production rejects and
produces a higher product quality and consistency.
Ladle Metallurgy - Alloy Injection
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Nitrogen is used to inject alloying powders into molten iron.
The effect of the submerged alloys and greater turbulence
increases yield, decreases alloy requirement, reduces production
rejects and produces a higher product quality and consistency.
Ladle Metallurgy - Nitrogen Desulphurisation
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| Nitrogen is used to inject desulphurisation agents
into molten iron remove sulphur from iron. This is especially
useful in the production of spheroidal graphite (SG, ductile)
iron. |
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