Introduction

Knelson centrifugal concentrator is a centrifugal mineral processing equipment, it has features of high recovery rate, easy operation, etc. It is mainly used for recycle heavy materials in mineral particles, especially good for placer gold mining. Deya Machinery produces automatic discharging and semi-automatic discharging concentrator.

Working principle

The machines utilise the principles of a centrifuge to enhance the gravitational force experienced by feed particles to effect separation based on particle density. The key components of the unit are a cone shaped “concentrate” bowl, rotated at high speed by an electric motor and a pressurized water jacket encompassing the bowl. Feed material, typically from a ball mill discharge or cyclone underflow bleed, is fed as a slurry toward the centre of the bowl from above. The feed slurry contacts the base plate of the vessel and, due to its rotation, is thrust outward. The outer extremities of the concentrate bowl house a series of ribs and between each pair of ribs is a groove. During operation the lighter material flows upward over the grooves and heavy mineral particles (usually of economic value) become trapped within them. Pressurized water is injected through a series of tangential water inlets along the perimeter of each groove to maintain a fluidized bed of particles in which heavy mineral particles can be efficiently concentrated. The Knelson concentrator typically operates as a batch process, with lighter gangue material being continuously discharged via overflow and a heavy mineral concentrate periodically removed by flushing the bowl with water.

Technical Parameters

Model STLB20 STLB30 STLB60 STLB80 STLB100
Capacity(t/h) 0-0.6 2-3 8-12 35-45(solids) 70-80
Fluidization water Required(m3/h) 2-3 3-5 7-10 30-36 55-80
Water Required
(m³/h)
1.5-4 5-7 8-12 35-50 70-120
Feeding Density(%) 0-50 0-50 0-50 0-50 0-50
Feeding size(mm) 0-3 0-3 0-5 0-5 0-5
Concentration Cleaning Up Cycle Vein gold 1-3 Hours Placer gold “2-6 Hours Vein gold 1-3 Hours Placer gold “2-6 Hours Vein gold 1-3 Hours Placer gold “2-6 Hours Vein gold 1-3 Hours Placer gold “2-6 Hours Vein gold 1-3 Hours Placer gold “2-6 Hours
Concentrate weight(KG) 2 10-20 30-40 60-70 80-90
Power(KW) 0.75 1.5 4 11 22
Water pressure
(Mpa)
0.04 0.12 0.25 0.35 0.4
Weight(KG) 145 400 1000 1500 2000
Overall Dimensions (mm) 790*785*790 1180*1140*1250 1970*1670*1750 2300*1800*2200 2400*2000*2300

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