Gold Concentrator

STAR TRACE concentrator is kind centrifugal concentration equipment .It can be used not only for placer gold mining, but also for hard rock mining to recover the natural gold, replacing amalgamation. It is also used to recover gold from the old tailings. Since1985, three models have been developed. Application shows that the recovery can be as high as 99%, especially for the case in recovering the natural gold in lode ore with 65% of the ore having milling size of 0.074mm,the recovery for the natural gold is expected up to 98%. For that natural gold of 0.004mm in particle size. The recovery is 97%. The cleaning up cycle is 1~4 hours. And the upgrade ratio is up to 1,000 times.

  • Gold Concentrator
  • High concentrating ratio and high recovery.
  • Total process automation, steady recovery performance.
  • Center discharges design for fast, secure concentrate removal.
  • Environmentally friendly (requires no chemical additives or reagents).
  • Low water and electricity requirements.
  • Low production costs, durable wear parts, minimal maintenance requirements.
  • Compact design requiring less space, easy merged into the existing mining processing.
  • Quick pay back on investment, typically less than half year.
Process Description

The STAR TRACE Concentrator is specifically designed for recovery of free, metallic gold, platinum or silver from hard rock circuits and is also an ideal technology for alluvial gold including secondary. Recovery from sand and gravel operations.

The STAR TRACE Concentrator subjects the material Being processed to a centrifugal field of up to 60G ’s which allows recovery of finer native metals than with conventional gravity concentration equipment.

Periodically, the high grade concentrate is removed from the concentrate cone during the rinse cycle. The rinse cycle time is typically less than 20 minutes per cycle. Optimum operating cycles will range from 1hr to 4hrs.

Feed is screened at approximately 2-4mm depending on the application, introduced as slurry through the central vertical feed pipe and accelerated by the rotor. Rapid stratification according to specific gravity occurs as the material is driven up the grid concentrate cone wall under the influence of an immense gravity field.

Fluidization water is injected through the rotor wall to create a dilated or fluidized bed. The high specific gravity gold or other target particles become embedded in this zone and are retained here until the machine is stopped and the concentrate is rinsed down through the concentrate discharge ports.

A centrally located rinse manifold directs jets of water to thoroughly rinse concentrate from the retention zone after each operating cycle.

How does STAR TRACE Concentrator Work
  • Fluidization water is introduced into the concentrate cone through a series of fluidization holes.
  • Feed slurry is then introduced through the stationary feed tube and into the concentrate cone. When the slurry reaches the bottom of the cone it is forced out ward and up the cone wall under the influence of centrifugal force.
  • The slurry fills searching to capacity to create a concentrating bed. Compaction of the concentrating bed is prevented by fluidization process.
  • The flow of water that is injected into the rings is controlled to achieve optimum bed fluidization. High specific gravity particles are captured and retained in the concentrating cone.
  • Upon conclusion of the concentrate cycle, concentrates are flushed from the cone into the concentrate a under through port.

Operation :

  • The preparation and pre-check before startup.
  • Prepare and check before startup according to the operating requirement.
  • Check whether the degree of tightness of V belts is appropriate.
  • Check whether the moving part is no intervening to each other.
  • Check whether the Concentrated is charge pipe is closed.

Start the equipment

  • Follow the requirement of the preparation and pre-check before startup, then, turn on the power supply. Make sure the running orientation of Electro Motor is the same as red arrow head on the outside of launder and every part does not interfere each other. All after that, you can turn on the power supply and the equipment is under the natural running.
  • Feed the slurry Open the fluidization water valve when the equipment working normally, mean while, feed the slurry which confected under the required proportion of liquid and solid.
  • Attention when the equipment is working
  • Under the working requirement of electromotor, watch the temperature and current.
  • Make sure that every moving parts are working normally.
  • Pay attention to the proportion of liquid and solid of slurry at any time, adjust it in time.

Stop the equipment

Clear up the concentrate after the period of working time. Before stop the equipment, stop feed slurry first and then stop supplying fluidization water, stop the equipment at last. Stop the equipment for a long time is lose, because it is easy to the concentrate which is in the concentrate cone. In addition, it must feed slurry at first then add the fluidization water when turns on the equipment again after temporarily stop the equipment. It can avoid losing gold.

Equipment Maintenance

Maintenance the equipment periodically as the requirement to electromotor. Clear up the equipment after one period of working time.

Model STR20 STR30 STR60
Feeding Capacity (T/h) 0-0.6. 2-3 8-12
Fludization Water Required (m3/h) 2-3 3-5 7-10
Slurry Water Required (m3/h) 1.5-4 5-7 8-12
Feeding Density (%) 0-50 0-50 0-50
Concentration Cleaning Up Cycle Vein gold 1-3 Hours Placer gold:2-6 Hours
Concentration Weight (Kg) 2 3-5 10-20
Power Requirements (Kw) 0.75 1.5 4
Approximate Shipping Weight (Kg) 215 410 1000
Approximate Crated Shipping Dimensions (mm) 800*560*170 1330*116*1272 1850*1550*1500


  • Technical data specification subject to change.
  • Special OBMS can be made on request, Please send us your technical data and application, required for our engineers to provide.
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