Bruks Siwertell has completed the commissioning of a Siwertell ST 640-M ship-unloader in Mexico.
The equipment has gone into operation at the new agri-bulk terminal operated by Puertos Especializados Transnacionales PETRA, a subsidiary of Grupo Gramosa.
The import facility has been designed to offer excellent grain handling and environmental protection capabilities using the proven Siwertell screw-type conveying technology.
The new, rail-mounted Siwertell ship unloader is totally enclosed, ensuring a spillage and dust-free operation. It has a continuous rated capacity of 1,200 tph and a peak capacity of 1,320 tph, discharging vessels up to 80,000 dwt.
The unloader is able to handle a number of different grains such as corn, soya meal, dried distillers grains (DDG), and canola seeds without any loss of efficiency.
Originally ordered in 2018 and delivered fully assembled in 2019, the terminal is now complete and the new ship-unloader has been brought into operation following operator training.
Gramosa chose Siwertell technology because it outperformed all other competitor systems during a four-month selection process. It had considered two 600 tph pneumatic systems.
The analysis showed that a single Siwertell ST 640-M ship-unloader would be a more economical solution in the long run. According to Bruks Siwertell, the operating costs comparing two pneumatic unloaders, delivering an equal total capacity, was lower, while the Siwertell unloader offered cost savings from reduced berth occupancy as through-ship efficiency was greater.
“One of the many outstanding qualities of the Siwertell ship-unloader is its ability to handle grains gently,” explained Per Wahlström, contract manager at Bruks Siwertell.
“The screw-type conveyor offers steady conveying velocities, with minimal particle collisions within the conveyor, keeping material degradation to a minimum.
“But this was not all, the Siwertell unloader was selected after comparing many features such as operating principles and mechanisms, investment costs, as well as operating costs. In combination, the cost and energy savings, efficiency gains, and gentle grain handling, meant that Gramosa picked a Siwertell unloader instead.
“Its new owners are happy with the initial performance tests. In fact, the capacity of the unloader currently exceeds the capacity of the receiving equipment. So, the unloader is ready to offer more, should the terminal require it,” concluded Wahlström.