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2020 / 2021 Edition

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Another Egyptian order for Mogensen

Mogensen S2056 Sizer

Company to deliver a further Type S2056 Sizer to El Nasr phosphate rock processing plant

MOGENSEN have received an order for a new Type S2056 Sizer from El Nasr phosphate rock processing plant in Egypt. The machine, which is scheduled for delivery in early August, will supplement the two machines currently in operation to increase plant capacity.

Mogensen’s connection with the El Nasr plant goes back 28 years. Two S2056 Sizers lined with wear-resistant vulcanized rubber were delivered in 1984 and operated successfully under very arduous conditions meeting all specified requirements for 17 years.

In 2001, these were replaced by two identical machines which have continued the previous satisfactory performance. The feed to the Sizers is abrasive phosphate rock slurry delivered from a rotary crusher via a trommel fitted with 30mm aperture screen panels.

Each Sizer takes 150 tonnes/h of –30mm rock in water and makes a separation at 1.5mm (60% of the feed being less than the separation size). Oversize material is recycled to the machines via a cone crusher, thus increasing the feed rate by an estimated 50%. Each Sizer is driven by two counter-rotating Invicta BL50-75/6 rotary electric vibrators delivering a linear vibration.

According to Mogensen, the repeat business at El Nasr is due to the major advantages offered by the Sizers’ screening technique, which utilizes a bank of relatively steeply declined decks with apertures greater than the aimed-for separation size; typically, the bottom deck aperture is twice the separation size.

The large open area available for material flow allows the Mogensen machine to process a much larger volume of feed than would be possible using a conventional screen occupying the same floor area. As a result, the machine is much lighter than would be the case with a conventional screen of the same capacity, less support steelwork is needed, and power consumption in relation to the feed rate is comparatively low.

Maintenance is also quicker and more economical as the Mogensen screen decks are relatively small and easy to handle.

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