Project
Transhipment Plant Sedrun

On behalf of Arge Transco Sedrun, STAG engineered, built and successfully commissioned, in 2003, an extraordinary transhipment plant for bulk products such as cements, ashes and microsilica necessary for the construction of the world’s longest railway tunnel.  

 

The bulk materials were delivered by Rhaetian Railway, then pneumatically blown into the silo system and afterwards pneumatically transported, on request, over a longer distance into the concrete mixing facility situated 900 m below at the pit bottom. Due to the unique nature of this large-scale project, STAG AG as the system supplier had to address enormous challenges in all project phases, and managed to master these challenges with great success.  

Essential Information

Applied Main Components for the Portal

  • Rail wagon unloading station
  • Silo plant with steel works and integrated compressor station
  • Fluid air slides as silo discharge system for feeding into the pressure conveying vessels  
  • Pressure conveying vessel (tandem)
  • Conveying line
  • Compressor conveying and control air
  • Compressor control air
  • Ventilator fluid air slides
  • Conveying screw (microsilica) with container loading facilities
  • Electric cabinet including plant control

Pit head

  • Pneumatic pressure discharge conveying (tandem)
  • Dense phase conveying line (Denseflow)

 

Particularities

  • Technologically demanding plant control System

Client

  • AlpTransit Gotthard AG
  • Arge Transco Sedrun

 

Technical Information
Leistungsdaten
Systems Conveying rate Conveying distance
Pneum. Cement conveying portal-pit head 25 t/h 1'100 m
Pneum. Cement conveying pit head –pit bottom 25 t/h 940 m
Systems
  • Rail wagon unloading station
  • Silo plant for storage of cements and microsilica
  • Pneumatic transport of cement
  • Dense phase conveying lines (Denseflow)
  • Conveying and control air treatment stations (compressor)
  • Plant control system
  • Microsilica loading from silo into containers provided by the customer
Bulk Material
Bulk Material Grain size Moisture content Bulk density Temperature Property
Div. cements - < 0.2 % 1.1 kg/dm3 < 80 °C not abrasive
Microsilica - - 0.6 kg/dm3 - not abrasive
Appropriate Topics
Pressure Conveying Vessel

The pressure conveying vessel is used by STAG when it comes to challenging tasks, high conveying rates and long con-veying distances. This pneumatic conveying application using the dense flow method combines energy-optimised conveying processes with perfect operational safety.

to the product
Rail Wagon Discharge

For financial and ecological reasons, silo rail wagons are increasingly used for transporting bulk products. The regional distribution of these bulk products is ensured by appropriate silo trucks. The transhipment systems constitute the link for transhipment of materials from rail to road.

to the product
Dense Phase Pipe "DenseFlow"

In conventional conveyances of powdered bulk materials through smooth pipes, the irregularity of the flow rises with the increasing pipe length. This in turn, increases the wear of the system.

 

to the product