Heavy-duty mobile screening
The SZ-450D is a scalper, not a grader. A 5,150 × 1,550 mm two-deck box fed by a chain plate conveyor takes run-of-blast feed up to 500 mm at 200–500 t/h and splits it into three fractions before anything reaches a crusher. It exists to take the dirt, the fines and the oversized out of the stream early, where removing them is cheap.
Wet, sticky, clay-laden feed that blinds ordinary screens. See how the heavy-duty deck keeps material moving and separates mud from stone.
Watch more videosRemoves fines and dirt before the jaw or impactor sees them.
High-amplitude scalping where a standard deck would blind.
Splits soil from rubble so only the rubble is crushed.
Every crusher downstream pays for the material it should never have seen. Clay blinds a screen deck, fines pack a chamber, and oversize stalls a jaw. A scalper in front of the plant removes all three at the cheapest point in the flow: the chain plate feeder carries lumpy, sticky, wet feed without the bridging that stops a belt, and the two decks pull the fines out before they can turn into mud.
In practice the SZ-450D is used in three places: ahead of a primary on a wet quarry, on demolition and excavation spoil where the soil fraction has to be separated from the rubble, and on overburden where the usable stone is a minority of the tonnage. It carries three discharge conveyors, so the three fractions go to separate stockpiles rather than back into one pile.
A chain plate feeder drags the feed out of the hopper at a controlled rate: this plant handles material a belt feeder cannot, because the plates carry the load rather than relying on friction. The material then falls onto a two-deck heavy-duty box driven at high amplitude and low frequency, which is the combination that breaks the bond between wet fines and coarse rock instead of letting it ball up on the mesh.
The top deck takes out the oversize, the bottom deck the fines, and the middle fraction passes through. Because the box is short and steeply angled, the material is separated rather than conveyed: residence time is brief, so a high tonnage passes without the bed depth building up to the point where the screen blinds itself.
Requires external power supply
Built-in generator, diesel driven
China III / IV · EPA Tier 4 / Euro V
18-Month Warranty · Installation & Training · Remote Diagnostics · Spare Parts Supply
How this machine is paired with the rest of the plant, and what changes when the feed changes.
Screening in a hard rock line › Screening in a soft rock line ›
Site conditions, throughput and the result the customer reported.
250 TPH Mud and Stone Separation Plant in Kazakhstan › 300 TPH Heavy-Duty Screening in Fujian ›
Specification sheets, the 18-month warranty terms and answers to the questions buyers ask first.
Download brochures & spec sheets › Watch the machines at work › Warranty & service programme › Crusher FAQ ›
The four questions buyers ask first about this machine - answered from the spec sheet, the cases library and the service programme.
Scalping. A 5,150 × 1,550 mm two-deck box fed by a chain plate conveyor takes run-of-blast feed up to 500 mm at 200–500 t/h and splits it before anything reaches a crusher. It removes dirt and fines; it does not grade saleable aggregate.
The chain plate feeder meters material in instead of flooding the box, and the coarse first deck sheds clay before it reaches the second. That is the difference between a scalper and an inclined grader on a wet season site, where fines blind the media.
Deck count and deck split sizes are in the spec table above. Deck count decides how many saleable fractions one pass produces; the solutions pages map typical two-deck and three-deck splits to standard commercial gradations.
Standard build is 20 working days after deposit, before inland transport and sea freight; custom configurations are scheduled at drawing confirmation. Screen media ships packed with the plant so first-day production does not wait on mesh panels. Body warranty runs 18 months from commissioning or 3,000 operating hours, whichever comes first.
Specifications may vary depending on final configuration and project requirements. A dash or blank means the parameter is not listed for this model.
| Chain plate feeder | |
|---|---|
| Model | 1038 |
| Specification (mm) | 1,000×3,800 |
| Processing capacity | 200–500 t/h |
| Maximum feed particle size | <500 mm |
| Operation speed | 0.2 m/s |
| Drive type / power | C / 11 kW |
| Screen box | |
| Screen model | 1548 |
| Screen box (L×W) | 5,150×1,550 mm |
| Screen layers | 2 |
| Screen mesh | Based on customer aggregate conditions |
| Amplitude (adjustable) | 8–10 mm |
| Drive type / power | Dual-power / 7.5 kW×2 |
| Conveyors | |
| Finished conveyor power | Dual-power / 9.2 kW×2 |
| Finished conveyor discharge height | 1,550–3,200 mm (adjustable) |
| Finished conveyor (L×W) | 4,900×1,600 mm |
| Side conveyor 1 power | Dual-power / 7.5 kW |
| Side conveyor 1 discharge height | 2,560 mm |
| Side conveyor 1 (L×W) | 6,700×1,000 mm |
| Side conveyor 2 power | Dual-power / 7.5 kW |
| Side conveyor 2 discharge height | 2,730 mm |
| Side conveyor 2 (L×W) | 6,700×1,000 mm |
| Complete machine | |
| Overall weight | 33.8 t |
| Total working power | 59.4 kW |
| Fuel consumption | 13–15 L/h |
| Transportation size (L×W×H) | 14,500×3,750×3,450 mm |
| Working size (L×W×H) | 14,500×8,000×3,450 mm |
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