Screw conveyors are often used inside plants because they are completely enclosed, thus material transfer is weather-proof and dust-free. Thanks to the small number of installed components, these machines require minimum maintenance.
Motridal’s range of production varies from the most common tubular or channel trough screw conveyors, to screw feeders, dozers, and mixers, where process and transport requirements are combined.
Trough ends are dust-tight with bearings suitable both for radial and axial loads; longer screw conveyors are equipped with intermediate hanger bearings, in order to minimise shaft deflection.
The design and selection of materials for the screw conveyor are adapted depending on the properties of the conveyed product (abrasiveness, bulk density, size, moisture, chemical properties, etc.).
Thanks to its Augers Division, that produces forged and continuous flighting, Motridal can manufacture, upon request, machines for special purposes, with shape, dimension and materials, not included in standard production.
COOLING SCREW CONVEYORS
Hot materials, like ashes, are often required to be cooled down before discharging or conveying to downstream process. Motridal, if the process conditions allow it, is able to design and provide water cooled screw conveyors to reach the desired outlet material temperature.
MIXING SCREW CONVEYORS
The screw conveyors are utilized in some process to mix different products while they are conveyed. Several designs and features are available to satisfy any specific application.
VERTICAL SCREW CONVEYORS
In case of very fine products, like cement and ashes, vertical screw conveyors are a valid alternative to bucket elevators for lifting the material. Motridal design and manufactures vertical screw conveyors up to 20m height and 500 TPH.
HUMIDIFICATION SCREW CONVEYORS
Screw conveyors are one of the preferred equipment to restore or increase the moisture content in the bulk material. Proper spray nozzles design together with the mixing capacity of this type of conveyor make this operation easily achievable. Furthermore the dust tight design and construction material selection make the process safe and durable.
SHAFTLESS SCREW CONVEYORS
The transport of sticky materials, like muds, requires a self-cleaning solution as the shaftless screw conveyors. A continuous flight directly supported by the casing is the common application. Motridal is able to provide this type of conveyor with any size and length technically feasible.
In many situations the bottom of silos and hoppers are required to be equipped with a multi-screw extraction feeder. This application allows the extraction of a difficult product from the silo or the hopper, avoiding “bridge” problems.
DOSING SCREW CONVEYORS
The inborn characteristics of the screw conveyors make them suitable for dosing products inside a process. Driven by means of variable frequency drive they can provide the right quantity of material at the desired ratio. Single or multiple screw version are available in Motridal range of production.
For information about Motridal products and services, contact us.