Protective Gas Mixing System GMA

The RAUCH Protective Gas Mixing System GMA ensures that reactions between liquid Magnesium melt and oxygen (air) are prevented, as the melt surface is constantly covered with protective gas. The protective gas is prepared in the Protective Gas Mixing System GMA and it essentially comprises of a carrier gas and the actual protective gas (HFC or SO2).

Design:

  • As an individual (for one Mg furnace) or as a central Protective Gas Mixing System GMA (for multiple furnaces).
  • Volume-controlled (GMM) or pressure-controlled (GMD) design.
  • Gas Distribution Cabinet (GZE) required when using pressure-controlled systems.
  • Large plants possible with gas supply containers.

Advantages of the Protective Gas Mixing System GMA:

  • Protective gas volume and concentration is automatically controlled depending on the operating condition of the Magnesium furnace.
  • Parameter adjustment at the gas supply control panel or on the furnace control system.
  • Protective Gas Mixing System GMA monitors all process-relevant pressures and flow rates and signals this in the event of a fault.
  • Automatic bottle switching for protective gas bottles.
  • In the event of a fault (e.g. power failure), an immediate switch to emergency operation is possible and the safe cooling of Magnesium melt is ensured.
  • When using SO2 as protective gas, a gas safety cabinet with leak sensors and ventilation system is realised.

 

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Gas Mixing Unit GMM

The RAUCH Gas Mixing Unit GMM is used in the volume regulation of N2/SO2 and N2/HFC. RAUCH can accommodate SF6 however recommend the other gasses due to less environmental impact.

Design:

  • Gas mixing cabinet for producing the protective gas.
  • The main component is the carrier gas Nitrogen, addition of SO2 or HFC/R134a/SF6 as protective gas.
  • Individually adjustable concentration and volume flow of gas mixture for the different gas supply zones.
  • Individually adjustable gas supply values depending on the operating condition of the furnace system.

Pressure-Controlled Gas Mixing Unit GMD

RAUCH Pressure-Controlled Gas Mixing Units GMD are available for N2/SO2 and N2/HFC. 

Design:

  • Pressure-controlled and central gas supply.
  • Gas mixing cabinet for producing a protective gas from N2 and SO2 or N2 and HFC/R134a.
  • The main component is the carrier gas Nitrogen, addition of SO2 or HFC as protective gas.
  • Individually adjustable concentration and outlet pressure of protective gas mixture.
  • Shared ring line to supply multiple Magnesium furnaces with protective gas.
  • The required volume flows are adjustable at the extraction points of the individual furnaces through Gas Distribution Cabinet (see Gas Distribution Cabinet GZE).

Pressure-Controlled Gas Mixing Unit GMD for RSA, MLA, sheet metal casting plants:

    • All Pressure-Controlled Gas Mixing Units can be adjusted in size (required volume of protective gas for the systems) and number of gas output circuits depending on the respective situation, e.g. for re-melting plants, Mg alloy facilities, sheet metal casting plants, etc.

    Gas Distribution Cabinet GZE

    The Rauch Gas Distribution Cabinet GZE is required to adjust the volume of protective gas (volume flow) to the individual Magnesium furnaces when using a central gas supply, e.g. Pressure-Controlled Gas Mixing Unit GMD.

    Advantages:

    • Individual volumes of protective gas for the different consumers, e.g. melt chamber, pump chamber, EcoJet, etc.
    • The acquisition of a Gas Distribution Cabinet is only necessary when expanding production capacities (e.g. MDO) and using a central gas supply.

    Gas Supply Container

    RAUCH also produces the GMD type systems in a container version. In this case, the components are not installed in a cabinet, but rather in a separate container or a specially designed room.

    This design is intended for a larger number of melting systems (five or more systems).

    Advantages:

      • Simple loading and unloading of the protective gas outside the production hall.
      • Central protective gas exchange for the entire production process.
      • Reduction of maintenance costs in comparison to multiple individual gas supplies.
      Gas Supply Container