The SB-40 concentrator retains the highest density particles from a feed slurry to periodically produce a small but relatively higher-grade concentrate (up to 1% by mass).Concentrate grades can be very high, often measured in percentage of metal, i.e. 3% Au, etc. The high grades obtained mean that weight recovery is very low, usually <1%. Operating at up to 200 G’s, this product range produces an intermittent stream of concentrate at a maximum mass pull of <1%. Fluidization water is required.
Principal application is recovering fine and coarse free precious metals including gold, silver and PGM’s to a high-grade concentrate. Maximum particle feed size is 6 mm, however, screening at 2 mm is recommended. The heaviest layers pass over the concentrate bed retained in the riffles at the top of the rotor bowl.
The addition of back-pressure water from behind the riffle beds enable heavy target particles to migrate to the bottom of the bed and be retained in preference to lighter particles.
The high G’s permit effective recovery for even very fine particles and the depth of the concentrate bed allows coarser particles in the feed stream to be processed. When the bed has built up to a sufficient grade the feed is stopped, the rotor slowed and the built in spray manifold rinses the concentrate under the rotor baffle and out he rotor discharge ports. This Semi-Batch process is well suited to fine native metal (Au, Ag, Pt) recovery. The addition of process water enables these units to handle coarser feed streams. The SB units are suitable for recovery of both fine (down to 10 microns) and coarse precious metals in the free, metallic state recommended.
Concentrate grades can be very high, often measured in percentage of metal, i.e. 3% Au, etc. The high grades obtained mean that weight recovery is very low, usually <1%. The heaviest layers pass over the concentrate bed retained in the riffles at the top of the rotor bowl. The SB-40, batch concentrator, is constructed of stainless steel, except for the wear resistant UHMW bowl. It has a variable speed drive.
SOLIDS CAPACITY: 0.0 – 0.3 US tons/hour
MAX SLURRY CAPACITY: 10 US gpm
G-FORCE RANGE: 50 – 200
MACHINE WEIGHT: 81 lbs.
MOTOR POWER: 1/5 HP
PROCESS WATER: 1 – 5 US gpm
MAXIMUM FEED PARTICLE SIZE: 0.06 inches
DIMENSIONS: 20 In. (W) x 14 In. (D) x 23 In.
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