DOVE Spiral Classifier, also referred to as Screw Classifier, or Spiral Mineral Separator, is highly efficient classifier designed for closed circuit wet classification and separation of the Slimes from a sandy sized material. It is well suited for classification, where a two product size split is required.
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A Spiral Classifier is a machine that is primarily used to classify the slimes from a coarser, sandy sized material. It has an inclined trough with one or two spirals revolving slowly and free from touching the sides or bottom of the tank. The motion of the spiral creates Pool Hindered Settling in the bottom pool area, where the agitation of the water hinder the fines from settling to the bottom, but the coarser particles do settle and are carried up the slope by the revolving spiral ...
The Hydraulic Classifier is made in 2, 4, 6, and 8 compartments with two sizes of compartments, namely 4x 4 and 8x 8. The standard units are of steel construction. Capacity depends on specific gravity of the material and range of size taken from each compartment.
Width 12, 16, 20, 24, 30. Conveyor length 30 to 400 BFL. D.O.T. 4.75 3.15 3.15 BF + 3.5 General technical data Max. load capacity35 lb/ft Conveyor speed 20 to 200 ft/min Inclined/declinedNot suitable.
Classification equipment may include ore sorters, gas cyclones, hydrocyclones, rotating trommels, rake classifiers or fluidized classifiers. An important factor in both comminution and sizing operations is the determination of the particle size distribution of the materials being processed, commonly referred to as particle size analysis .
Spiral can be of single pitch or double pitch. Single pitch spirals consist of one continuous spiral ribbon. The double pitch spiral has twice the raking capacity of a single pitch assembly and consists of two duplicate spiral ribbons. Rake classifier is a mechanical classifier consists of a rectangular tank with a sloping/inclined bottom.
The spiral classifier such as the Akins classifier consists of a semi cylindrical trough inclined to the horizontal. The trough is provided with a slow rotating spiral conveyor and a liquid overflow at the lower end. The spiral conveyor moves the solids which settle to the bottom upward toward the top of the trough.
June 10, 2020
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