The FDD Series Compound Double-Action Jig is a heavy-duty gravity separation machine specifically developed for the pre-concentration of coarse mineral particles. Unlike conventional diaphragm jigs that rely on a single pulsation chamber, the FDD jig utilizes a unique compound double-action structure in which two jigging chambers move in opposite directions simultaneously.
This counter-motion design generates a larger stroke and stronger pulsating force, allowing coarse heavy minerals to achieve effective stratification and separation even at particle sizes where conventional jigs become less efficient.
The FDD Series Compound Double-Action Jig separates minerals based on differences in specific gravity.
During operation, the upper cone and lower cone are connected by flexible rubber diaphragms to form sealed water chambers. Driven by the operating mechanism, the cones periodically expand and contract, generating a continuous and stable pulsating water flow within the jig chamber.
The pulsation acts on the mineral bed through the screen, causing the particles to repeatedly loosen, settle, and re-stratify. Under the downward water flow, high-density particles settle faster than low-density particles and gradually concentrate in the lower portion of the bed.
As stratification progresses, fine heavy minerals pass through the screen into the lower cone and are discharged through the lower concentrate outlet. Coarse heavy minerals form a concentrate layer above the screen and are discharged through the upper concentrate outlet, while low-density gangue and waste material are removed through the tailings outlet.
Through this continuous stratification process, the machine simultaneously recovers coarse and fine heavy minerals while rejecting waste material, achieving efficient gravity pre-concentration.
FAQ for FDD jig concentrator
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| Model | Cross-Section Shape | Number of Chamber | Jigging Area (m²) | Stroke (mm) | Stroke Frequency (r/min) | Capacity (t/h) | Power (kW) |
|---|---|---|---|---|---|---|---|
| FDD4-2 | Rectangular | 2 | 4.5 | 0-80 | 0-170 | 40-50 | 18.5 |
Note: Specifications are subject to change without notice due to ongoing product improvement.
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