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Total Solutions for Metals and Metal Fabrication MATHESON offers a complete line of gas products and gas application equipment to serve the Metals and Metal Fabrication industry. The following table summarizes the gas applications and relevant gases used in each. A wide variety of gas supply modes and application equipment options are available. We will work with you to design an efficient and cost-effective solution that meets your specific application requirements. Gas Applications used in Metals and Metal Fabrication Aluminum Production Gas Application Gases Used Oxygen Enriched Melting: Substituting oxygen for air in secondary aluminum smelting achieves higher productivity and energy efficiency, less flue gas, and reduced melt time and NOx emissions. Oxygen Aluminum Degassing: The removal of contaminants, such as dissolved compounds, gaseous hydrogen, and metal oxides from molten aluminum. Various degassing systems use a gas or gas mixture injected into the melt to produce metal free of porosity (bubbles) and other imperfections which weaken the finished aluminum. Argon Nitrogen Argon and/or Nitrogen mixed with Chlorine or Sulfur Hexafluoride Aluminum Extrusion Inerting: Inert gas is used to reduce the formation of oxides on the surface of aluminum extrusions and increase productivity. During the extrusion process constant flow of nitrogen or liquid nitrogen is injected through grooves machined in the extrusion die to displace the air around the hot (800-1000°F) extruded aluminum. Nitrogen Liquid Nitrogen Molten Bath Blanketing: Cryogenic and gaseous argon and nitrogen Molten Bath . Argon Liquid Argon Blanketing: Provide chemical inerting in highly-reactive or toxic alloying and reduces surface oxidation and metal vaporization. Nitrogen Liquid Nitrogen Steel Production Gas Application Gases Used Stirring: Nitrogen, carbon dioxide or argon bubbled through molten metal in BOF and EAF furnaces improves slag/metal mixing, increases melt yield, and lowers carbon and oxygen content in steel. Argon Nitrogen Carbon Dioxide Steel Reheating: Use of oxygen enrichment or oxy-fuel burners in steel re-heat furnaces improve furnace productivity, reduce fuel consumption and emissions. Oxygen Post Combustion: Post-combustion technologies are used for injecting secondary oxygen in the head space of BOF and EAF furnaces to burn carbon monoxide generated in steelmaking processes to carbon dioxide. Oxygen Slag Splashing: Slag Splashing utilizes high pressure, high volume nitrogen to splatter the slag in the BOF furnace to coat the refractory walls. The slag extends the life of the refractory by protecting the refractory walls from molten metal. Nitrogen Iron Runner Blanketing: Purging of the headspace of covered iron runners in blast furnace prevents oxidation of iron and generation of fumes. Nitrogen Oxygen Enrichment: Adding oxygen to the blast furnace & ladle improves productivity; Adding Oxygen to combustion air or directly injecting oxygen into the tuyere of cupola increases melt rates, improves spout temperature control, and enhances carbon pick-up. Oxygen Casting Degassing: Injection of inert or specialty gases facilitates the removal of detrimental soluble gases. Argon Nitrogen Molten Metal Blanketing: Inert gas blanketing during melting in induction and crucible furnaces produces an oxygen deficient atmosphere which reduces gas pick up and oxide formation. Argon Nitrogen Molten Bath Blanketing: During the melting of many metals and alloys, atmospheric Oxygen may combine with the liquid metal and form an Oxide. Cryogenic and gaseous Ar and N2 Molten Bath Blanketing: provides chemical inerting in highly-reactive or toxic alloying and reduces surface oxidation and metal vaporization. Argon Liquid Argon Argon Oxygen Decarburization (AOD): Argon/oxygen injection provides efficient desulfurization, decarburization, degassing and bath mixing with minimal metal oxidation. Argon/Oxygen Metals Fabrication Gas Application Gases Used Heat Treating: In heat treating, the controlled use of specific gas or gas mixture atmosphere, time and temperature combine to change the internal structure of pure and alloy metals. By adjusting the heat treat atmosphere, time or temperature combination, materials can be made harder, stronger, or softer; one better suited for its end use. Argon Helium Hydrogen Nitrogen Nitrogen/Hydrogen Mixture Nitrogen/Methanol Mixture Lasers: High powered lasers used for cutting and welding require various gases for operation. Argon Carbon Dioxide Carbon Monoxide Helium Hydrogen Neon Nitrogen Shrink Fitting: A process which joins two metal parts, one inside the other, with interference fit. The inner part cooled with liquid gases will contract sufficiently to allow insertion into an uncooled outer part. As the inner part warms to ambient temperature, it will expand, joining the two parts via a force or interference fit. Liquid Nitrogen Liquid Carbon Dioxide Related Products used in Metals and Metal Fabrication   As a total solutions provider, MTG also offers the following products and services in support of the following functions within the Metals and Metal fabrication facilities :   ASUs  for on-site production of bulk oxygen, nitrogen and argon, and on-site generation of oxygen, nitrogen, and hydrogen.   Environmental monitoring and compliance EPA Protocol Certified Standards that meet or exceed gas standards specified in US regulations for environmental compliance; instrument support mixtures and gas delivery systems.   Safety Equipment for workers such as personal protective gear, work clothing and first aid.   Welding and Cutting Gases, equipment and consumables used to maintain the production facilities and machinery.   Welding Fabrication   Laser gases for welding, cutting, drilling, etching and marking.   Propane to fuel forklifts and generators.

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