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 Iron & Steel Production & Processing Melting & Casting Refining Forming Heat Treatment |
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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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