spiral scraper conveyor Overview

spiral scraper conveyors from ZOOMRY are bulk reclaiming and transfer systems available in enclosed or dust-controlled configurations for coal, gravel, grain, ore, and fine-powder handling. Rated for 100–2,000 t/h throughput with spiral outer diameters from 500 to 800 mm, this spiral scraper conveyor pairs a rotating scraper assembly with an integrated belt conveyor for controlled, low-spillage operation in mining, cement, metallurgy, and stockyard applications.

Unlike conventional fixed screw conveyors, the unit is built around a spiral scraper reclaiming mechanism that gathers material across a 2.4–3.6 m retrieval width before transferring it to the integrated belt. Available with rubber or steel tracked chassis and dual wireless/local control, it adapts to both soft stockyard ground and hard quarry terrain. For specialized grain handling requirements, see the Grain spiral scraper conveyor variant.

---

Working Principle

The spiral scraper conveyor operates on a two-stage reclaim-and-transfer principle. A hydraulically driven rotating spiral assembly, fitted with 6–8 mm wear-resistant blades and alloy-coated teeth, penetrates the material pile across the full retrieval width. As the spiral rotates, the helical blade geometry draws material inward toward the centerline while the alloy teeth help manage lightly compacted material to maintain continuous reclaiming.

Reclaimed material is then discharged onto the integrated belt conveyor, which elevates it to a fixed 4 m discharge height for direct loading into trucks or downstream conveyors. The adaptive pressure adjustment function automatically modulates spiral speed and scraping depth when oversized material is encountered, feeding resistance data to the HMI in real time. This differs from standard en-masse chain conveyors, which require material to be gravity-fed into a confined trough rather than actively scraped from a stockpile.

---

Key Features

• Alloy-Toothed Spiral Blades: 6–8 mm thick blades with high-strength alloy teeth deliver approximately 1.2× the wear resistance of ordinary carbon-steel blades, based on material-design data, sustaining long-term impact from gravel and ore.
• Dual Tracked Chassis Options: Rubber tracks (400×90×68, 2.9 m effective length, 0.07 MPa ground pressure) suit soft ground; steel tracks (400×135×54, 3.6 m effective length, HRC58-62 hardened plates) handle rough hard surfaces.
• Integrated Belt Conveyor: Nylon-core anti-slip rubber belt with diamond-pattern surface treatment helps reduce material rollback when handling wet coal or sticky gravel.
• Dual-Mode Control System: 304 stainless steel IP65 control cabinet plus 100 m wireless remote control, with operation memory for three parameter sets and built-in overload protection.
• Modular Component Design: Bolted alloy teeth and segmented spiral blades enable individual replacement without full spiral shaft disassembly, supporting simplified on-site maintenance.

---

Related Spiral Scraper Conveyor Configurations

The table below shows how this standard model compares with related ZOOMRY spiral scraper conveyor configurations for specific application requirements.

Configuration	Throughput	Spiral Diameter	Chassis	Discharge Height	Best For
Standard Spiral Scraper Conveyor	100–2,000 t/h	500–800 mm	Rubber / Steel tracked	4 m (fixed)	General bulk reclaiming
Tracked spiral scraper conveyor	100–2,000 t/h	500–800 mm	Dual-config tracks	4 m (fixed)	Complex terrain mobility
Grain spiral scraper conveyor	100–2,000 t/h	500–800 mm	Rubber / Steel tracked	4 m (fixed)	Low-breakage, food-grade grain handling
Spiral scraper conveyor for loading	—	—	Wheeled / Fixed	4 m (fixed)	Loading-optimized transfer

---

Technical Parameters & Dimensions

Item	Specification
Equipment Type	Spiral Scraper Conveyor (Universal Type)
Capacity Range	100–2,000 t/h
Applicable Materials	Coal, gravel, grain, ore, aggregates, etc.
Spiral Outer Diameter	500–800 mm
Spiral Scraping Width	2–3.2 m
Material Retrieval Width	2.4–3.6 m
Blade / Teeth Configuration	6–8 mm blades + alloy teeth
motor Power	22–75 kW
Reducer Model	ZQ350 dual output / ZQ400 dual output / ZLY250 hard-tooth surface dual output
Integrated Belt Conveyor Width	800–1,600 mm
Conveyor Belt Length	12–15 m
Conveyor Belt Power	15–30 kW (electric drum)
Conveyor Belt Material	Nylon-core anti-slip rubber belt
Discharge Height	4 m
Hydraulic Pump Station Motor Power	11–18.5 kW
Tracked Chassis	Rubber tracks 400×90×68 (2.9 m) / Steel tracks 400×135×54 (3.6 m); chassis outer width 2.3 m (widenable)
Control System	304 stainless steel IP65 control cabinet + 100 m wireless remote + local control
Protection Rating	IP65 (control cabinet), IP55 (motor)
Ambient Temperature Range	-30°C to +60°C
Optional Configurations	Spiral blade wear-resistant coating, conveyor belt Rain Cover, material level sensor, chassis widening kit

Throughput depends on material bulk density, particle-size distribution, moisture content, reclaiming depth, and operating speed. This spiral scraper conveyor is suitable for stockyards, mining sites, aggregate plants, and port bulk handling operations where tracked mobility and integrated reclaim-to-load capability are required.

---

What Information Do We Need for Spiral Scraper Conveyor Selection?

To provide an accurate spiral scraper conveyor configuration, please share the following project parameters:

1. Material type and characteristics: Bulk density (t/m³), particle size distribution, moisture content, and whether material is sticky or free-flowing.
2. Required throughput: Target capacity in t/h, including peak surge requirements.
3. Stockpile or feed conditions: Material pile height, retrieval width requirement, and whether material is fed by truck, loader, or existing conveyor.
4. Site terrain and ground conditions: Soft ground (for rubber tracks) or hard/rough surface (for steel tracks), plus any slope or space constraints.
5. Existing equipment and installation context: Current reclaiming method, downstream conveyor or truck loading interface, and whether this is a retrofit or new installation.

---

Related Solutions