!!!! New  patented Centrifugal cone  last not less then 5000 hours. Motor power requiments times less compare to previous model with elastic bowl.

Advantages of Alluvial Pacific CCFB Centrifugal concentrator with floating bed

design

• Most portable 6 kg industrial duty concentrator with  microns size gold recovery , economical operations and very competative price.
• RPM adjustable 500-1450 r/min

•   Centrifugal concentrator with floating bed CCFB recover gold sizes  about 5-10 microns versus 30-40 microns of popular concentrators Knelson and Falkon.

•  Preliminary classification of material to be concentrated is not required. CCFB centrifugal concentrator with floating bed, apart from high extraction, catches all coarseness classes of heavy metals,   feeding material size ( for CCFB-720 – up to 5 mm) 

 • In operation of centrifugal concentrator with floating bed any special treatment of water is not required. Recirculated  technical water can be used . 

• Re-adjustment is not required. During transfer from concentrated coarse to fine (thin) material and vice versa re-adjustment of concentrator is not required.

• Stability of mineral bed loosening. Mineral bed in operation of centrifugal concentrator  CCFB (at pulp feed) can stay in loosened state as long as required.

• Good separating capacity. Extraction of gold and platinoid remains high despite of intermediate density mineral content in material to be concentrated (3-5 g/cm3) and their filling of mineral bed. At the same time CCFB centrifugal concentrators with floating bed can catch minerals of average density (3,5-5 g/cm3) on condition of frequent rinse, if they are available in big amount.

• Stability to high clay content in material. High clay content in material to be concentrated does not result in significant reduction of gold extraction in centrifugal concentrator CCFB.

• Relatively low cost. It is related with simple construction of centrifugal concentrator and absence of necessity in powerful bearing unit, and a part of its functions is performed by cone rollers.

• Compact design. It is inherent to all centrifugal concentrators, as they take area ten times smaller that jigging machines and concentration tables of the same capacity.

• Simple construction and operation. Simple construction results in simple operation, not requiring high qualification of servicing personnel. High degree of modularity of  CCFB centrifugal concentrator enables quick replacement of failed elements without profound disassembly of the whole construction. Failed elements can be reconditioned in local  workshops.

Operation principle of CCFB centrifugal concentrator width floating bed

 Flexible catching  cone pressing from some sides with rollers on fixed supports are the characteristic feature of CCFB (centrifugal concentrator with floating bed). As a result, the cone in cross section acquires shape of rounded triangle, square etc (depending on the number of pressing rollers).

During rotation, points of mineral bed move with periodic approach and removal from rotation axis 8. as though they are floating in centrifugal field. Radius of cone inner surface curvature changes with interval of dozens of hertz from minimum to extreme big one, and as a result centrifugal field has temporary value from zero to maximum, exceeding centrifugal field in non-pressed cone up to 1.5 times.

Mineral bed, formed in deep grooves between riffles, at bending of cone sides is subject to frequent compression and strain in direction of circular motion. When mineral bed is compressed it presses out from grooves for some amount, and when it is strained, it falls down in centrifugal field, thus performing movements similar to those of jigging machine.

Due to characteristic features of cone wall construction, during its rotation in compressed condition mineral bed layers shear with regard to each other, and these vibrations remind those of layers on vibration concentration tables.

Consequently, the mineral bed in centrifugal concentrator is subject to complex motions similar with motions on jigging machine and vibration table, but it all takes place in centrifugal field with variable value, whereas intensity of this value ranges from values close to zero to values in the first hundreds of "g". This motions support mineral bed in loosened fluidized state, when grains of various density, depending on their size, are quickly differentiated in depth of the groove: grains of high density fall down on the bottom, and the light ones – emerge in centrifugal field and move to open surface of groove, where they are taken by uprising pulp flow and removed.