Dewatering Vibrating Screen
The dewatering vibrating screen working principle is high-frequency solid-liquid separation: a vibrator drives the screen box so water and fine impurities are forced through the mesh, while coarser particles travel along the deck to discharge. Baichy ZSD dewatering screens cut washer discharge from 20%-30% moisture to 5%-8%, across 30-250 t/h and a 10 mm maximum feed size.
What Is the Working Principle of a Dewatering Vibrating Screen?
A ZSD dewatering screen separates solids from water on a vibrating mesh, fed evenly and driven at high frequency, so the material is affected by vibration and gravity. Four stages follow each other.
1. Feed spreading — material is evenly placed on the screen, affected by vibration and gravity.
2. High-frequency vibration — the vibrator drives the screen to vibrate at high frequencies.
3. Water and fines pass the mesh — moisture and fine impurities are affected by centrifugal force and forced through the mesh to discharge.
4. Solids retained and conveyed — material coarser than the mesh size is retained and moves forward with the vibration.
What Are the Parts of a ZSD Dewatering Screen?
Structural diagram of the dewatering screen
A ZSD dewatering screen consists of screen boxes, vibrators, screens and damping springs.
• Deck angle — the screen mesh design usually has a certain inclination angle, which helps material flow smoothly during screening.
• Frequency and amplitude — both are adjusted to the material properties and processing needs, to reach the required dehydration effect.
ZSD Dewatering Screen Specifications
| Model | Motor Power (kW) | Capacity (t/h) | Feeder Size (mm) | Sieve Plate Size (mm) | Sieve Plate Area (㎡) | Overall Dimension (mm) |
|---|---|---|---|---|---|---|
| ZSD1230 | 1.9 | 30–80 | ≤10 | 1200×3000 | 3.6 | 3085×1590×1439 |
| ZSD1236 | 2.2 | 30–80 | ≤10 | 1200×3600 | 4.32 | 3677×1590×1600 |
| ZSD1530 | 2.2 | 80–120 | ≤10 | 1500×3000 | 4.5 | 3075×2491×1601 |
| ZSD1536 | 3 | 80–120 | ≤10 | 1500×3600 | 5.4 | 3200×2491×1802 |
| ZSD1836 | 7.5 | 100–140 | ≤10 | 1800×3600 | 6.48 | 3758×3075×1988 |
| ZSD1842 | 7.5 | 100–140 | ≤10 | 1800×4200 | 7.56 | 4368×3075×2000 |
| ZSD1848 | 7.5 | 100–140 | ≤10 | 1800×4800 | 8.64 | 4791×3065×1959 |
| ZSD2442 | 11 | 140–180 | ≤10 | 2400×4200 | 10.1 | 4403×3737×1931 |
| ZSD2448 | 11 | 140–180 | ≤10 | 2400×4800 | 11.52 | 5008×3737×1977 |
| ZSD3048 | 15 | 200–250 | ≤10 | 3000×4800 | 14.4 | 4959×4518×2218 |
The output will vary according to different materials, feed particle size and other factors. Sieve plate area runs from 3.6 ㎡ (ZSD1230) to 14.4 ㎡ (ZSD3048); motor power from 1.9 kW to 15 kW.
What Moisture Content Does This Working Principle Reach?
Washed sand leaves the deck at 5%-8% surface moisture from a 20%-30% feed; a tailings slurry arrives at 60%-80% and leaves as a 15%-20% filter cake.
• Sand washing — 20%-30% in, 5%-8% out, dry enough to load without dripping.
• Tailings dry stacking — 60%-80% slurry in, 15%-20% cake out, from solids below 5 mm on a tailings dewatering screen.
• Fine sand recovery — a slurry pump, a hydrocyclone and the screen recover over 95% of particles in the 0.075-2 mm range.
Where the Working Principle Changes with the Duty
Aperture, deck and feed set the result; the mechanism is the same in every plant.
• Wet manufactured sand — crush, sand make, wash on a sand washer, dewater, stockpile; screen capacity is line throughput × 1.2.
• Fine sand recovery — washer overflow, slurry pump, cyclone, underflow onto the deck; recovery reaches 90%-95% through a fine sand recovery machine.
• Tailings and concentrate — 0.3-1.0 mm aperture for tailings, set by slurry concentration; 0.15-0.5 mm for concentrate, set by true density and particle shape.
Dewatering screen at a customer site
FAQ: ZSD Dewatering Screens
1. How does a high frequency dewatering screen work?
A vibrator drives the screen box at high frequency. Water and fine impurities are affected by centrifugal force and pass through the mesh, while coarser particles stay on the deck and move forward. Separation comes from vibration and gravity, not from a filter cloth.
2. What are the parts of a ZSD dewatering screen?
Screen boxes, vibrators, screens and damping springs. The vibrator supplies the high-frequency motion, the mesh sets which particles pass, and frequency and amplitude are set to the material.
3. What moisture content can a ZSD dewatering screen reach?
Washed sand leaves at 5%-8% surface moisture from a 20%-30% feed, dry enough for truck loading without dripping. Tailings dewatering is a separate target: a 60%-80% slurry leaves as a 15%-20% filter cake for dry stacking.
4. What is the maximum feed size of a ZSD dewatering screen?
10 mm on every model, from ZSD1230 to ZSD3048. A ZSD screen dewaters and deslimes minus 10 mm washer discharge; it is not a sizing screen for crusher output.
Baichy Heavy Industry
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