Jiaozuo Zhongxin Heavy Industrial Machinery Co.,Ltd.
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Spiral Chute

Material of Construction
High-strength fiberglass reinforced plastic (FRP) body with heavy-duty polyurethane lining for superior corrosion and abrasion resistance.
Feed Method
Centralized pulp distributor ensuring uniform slurry stream split across multi-start spiral columns.

Discharge & Cut Adjustment: Adjustable mechanical splitters at the trough discharge to precisely isolate concentrate, middlings, and tailings streams.

Power Requirement: Zero power consumption; operates purely on natural gravity, centrifugal forces, and fluid dynamics.

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Industrial gravity spiral separator bank showcasing compact modular equipment layout.
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Spiral Chute – Product Overview

The Gravity Spiral Concentrator (commonly referred to as a Spiral Chute or Spiral Separator) is an advanced, high-efficiency gravity separation equipment engineered for the wet beneficiation and concentration of fine mineral particles. Operating 100% on natural gravity, centrifugal forces, and hydrodynamic fluid dynamics, it delivers superior separation performance with zero electrical power consumption.
Designed with a heavy-duty fiberglass reinforced structure and lined with ultra-durable polyurethane, this static processing device eliminates moving parts, drastically reducing operational downtime and ongoing maintenance costs. By utilizing continuous helical flow dynamics to stratify minerals by density, the spiral chute serves as a cost-effective, eco-friendly solution for modern mineral dressing plants, silica sand washing facilities, and heavy mineral recovery circuits worldwide.

Spiral Chute
Spiral Chute

Zero Energy Consumption & Low OPEX

The gravity spiral concentrator operates 100% on natural gravity and fluid dynamics with zero electrical power consumption.

Spiral Chute

Efficient Separation of Fine Minerals

It delivers high mineral recovery rates for fine particle sizes ranging from 0.03mmto 2.0mm.

Spiral Chute

Superior Wear & Erosion Resistance

Heavy-duty fiberglass construction with a durable polyurethane lining ensures an extended lifespan against abrasive slurry.

Spiral Chute

Precise Grade Control with Adjustable Splitters

Movable discharge splitters allow operators to easily fine-tune cut points between concentrate, middlings, and tailings streams.

Spiral Chute

Compact Footprint & Modular Scalability

Configurable into space-saving modular spiral banks to deliver high processing capacity for mining projects of any scale.

Spiral Chute Features and Advantages

The Gravity Spiral Concentrator is an eco-friendly, zero-power physical separation equipment that efficiently recovers fine heavy minerals 0.03mmto 2.0mm using an anti-abrasive polyurethane-lined trough and precise discharge splitters for high processing capacity and low operating costs.

Advantages of Jiaozuo Zhongxin Heavy Industry's Spiral Chute and reasons to choose us


  1. Zero Energy Consumption & Low Operational Cost (OPEX)Eco-friendly gravity separation operating 100% without electrical power.

    The gravity spiral concentrator processes heavy minerals entirely through natural forces, eliminating the need for electric motors or complex drives. Operating with zero moving parts, it removes mechanical failure risks, slashes maintenance routines, and drastically reduces processing costs per ton for continuous mining plants.

  2.  Superior Separation Precision & High Mineral RecoveryEngineered helical profiles tailored for precise mineral stratification.

    Utilizing a combination of centrifugal force, gravity, and hydrodynamic drag, the spiral chute efficiently separates heavy minerals from light gangue across the $0.03\text{ mm}$ to $2.0\text{ mm}$ size range. Adjustable discharge splitters allow operators to fine-tune the cut between concentrate, middlings, and tailings for optimal grade and recovery.

  3. Exceptional Wear Resistance & Extended Equipment LifespanHeavy-duty construction using premium anti-abrasive materials.

    Built with a reinforced fiberglass structure and lined with high-durability polyurethane, this spiral separator withstands severe slurry abrasion from feeds with $25\%$ to $40\%$ solids content. Its robust design minimizes component replacement frequency, ensuring seamless long-term operation in harsh mining environments.

  4.  Compact Footprint, Modular Scalability & Rapid ROIHigh processing throughput per square meter of plant floor space.

    Designed to deliver maximum volume capacity within a minimal installation area, the equipment easily integrates into scalable spiral banks for mining projects of any scale. The combination of low capital expenditure, zero power consumption, and high mineral recovery yields an exceptionally fast return on investment.




What is the working principle of the Spiral Chute?

The Gravity Spiral Concentrator is an advanced, eco-friendly separation equipment engineered for the wet classification and enrichment of fine mineral particles ranging from 0.03mmto 2.0mm. Operating entirely on the combined action of gravity, centrifugal force, and hydrodynamic drag, the slurry flows down the polyurethane-lined helical trough where heavy minerals naturally migrate toward the inner margin while light gangue is driven to the outer periphery. Featuring a durable fiberglass structure, high resistance to slurry abrasion, and zero electrical power consumption, this spiral chute provides continuous, high-efficiency recovery for iron ore, gold, ilmenite, zircon, chromite, and silica sand processing plants. With adjustable discharge splitters that allow precise separation of concentrate, middlings, and tailings, it delivers a low-maintenance, cost-effective solution with a minimal footprint and rapid return on investment for mining operations worldwide.


Working principle diagram of gravity spiral concentrator showing centrifugal force and particle stratification.

Product Photos

Gravity spiral concentrator columns manufactured for wet mineral processing plants.
High-capacity spiral chute with anti-abrasive polyurethane lining in factory.
Heavy-duty fiberglass spiral concentrator structure displayed in manufacturing workshop.
Multi-start spiral separator with adjustable discharge splitters for fine mineral beneficiation.
Centralized slurry pulp distributor for spiral concentrator bank assembly in factory.
Modular gravity spiral concentrator unit ready for gold and chromite processing.
Gravity spiral concentrator bank operating in a continuous iron ore dressing plant.
Spiral chute installation performing gold mineral gravity separation at client site.
Industrial scale spiral concentrators processing silica sand in a wet beneficiation facility.

Specification

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Model & SpecificationsOuter Diameter (mm)Pitch Distance (mm)Pitch-to-Diameter RatioCross Slope /(°)Number of SpiralsTurns per SpiralFeed Particle Size/mmFeed Volume Rate/m3·h-1Pulp Density/%Capacity/t·h-1Overall Dimensions (L×W×H)/mmWeight/kg
LL-400×1804001800.49150.2~0.020.1~0.230~600.04~0.08460×460×120020
LL-400×2404002400.69250.2~0.40.1~0.2460×460×150030
LL-600×2706002700.459251~20.5~0.6700×700×200080
LL-600×3606003600.693、252~30.8~1.2700×700×2600100
LL-600×4506004500.759 、15、2153~41.0~1.4700×700×3000120
LL-900×4059004050.4593、250.3~0.033~530~601.5~2.51060×1060×3300350
LL-900×5409005400.694、355~72-31060×1060×4000400
LL-900×6759006750.75957~92.5-3.51060×1060×4650450
LL-1200×54012005400.4593、257~113~41360×1360×4330600
LL-1200×72012007200.694、3510~144~61360×1360×5230650
LL-1200×90012009000.759512~165~71360×1360×6130700
U-1500X67515006750.459450.8~0.0371430~4581800×1800×4650800
U-1500×90015009000.69450.8~0.0371530~458.51800×1800×6130850
DL-2000200012000.692~33.5~44~0.045015~4515~402300×2300×6500900


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Common Problems

This section is designed to address the most pressing inquiries customers may have regarding the daily operation, maintenance, product advantages, and after-sales service of our machine. Our aim is to help you gain a comprehensive understanding of our overall capabilities and enable you to make informed decisions for your projects.

A gravity spiral concentrator is a versatile mineral processing equipment widely used for the beneficiation and enrichment of heavy minerals from light gangue. Primary Ores: Highly effective for processing iron ore, gold, ilmenite, zircon, chromite, rutile, monazite, tin (cassiterite), tungsten, and tantalite. Non-Metallic Minerals: Excellent for silica sand cleaning, glass sand purification, and coal washing. Separation Criterion: It successfully separates any mineral mixture where a sufficient specific gravity differential exists between the valuable heavy minerals and the waste tailings.

Achieving maximum mineral recovery rates requires maintaining proper feed particle size distribution and slurry concentration.Particle Size Range: The ideal feed size spans from 0.03mmto 2.0mm. It excels in liberating fine-grained heavy minerals.Pulp Density (Solids Concentration): The optimal slurry feed density ranges between 25% and 40% solids by weight.Process Stability: Consistent slurry volumetric feed volume and controlled pulp density prevent turbulence, ensuring smooth hydrodynamic separation along the helical trough.

The spiral separator is an eco-friendly gravity separation device that operates 100% without electrical motors or moving mechanical parts. Driving Forces: The separation relies entirely on natural physical forces: gravity, centrifugal force, hydrodynamic drag, and secondary lateral fluid flow. Flow Mechanics: As slurry descends the helical incline, heavier particles experience less centrifugal force and migrate toward the inner margin, while lighter gangue particles are pushed outward. Cost Reduction: Operating with zero energy consumption dramatically lowers operational expenditure (OPEX) and power infrastructure requirements for remote mining sites.

Our spiral chutes are specifically engineered to withstand extreme abrasive conditions common in continuous mineral dressing plants. Structural Material: Built with high-strength fiberglass reinforced plastic (FRP) for structural rigidity, lightweight handling, and corrosion resistance. Anti-Abrasive Lining: The working surface is coated with high-durability polyurethane or corundum-infused wear coatings to resist heavy slurry erosion. Extended Service Life: Excellent wear resistance extends the equipment operational lifespan, minimizes unscheduled maintenance downtime, and reduces overall replacement costs.

No chemical reagents, collectors, or frothers are required during the gravity separation process. 100% Physical Separation: The equipment utilizes only water and natural mechanical forces to stratify and collect heavy minerals. Eco-Friendly Processing: Produces clean, non-toxic tailings, making it ideal for environmentally sensitive mining jurisdictions and strict discharge regulations. Water Recirculation: Process water can easily be clarified, recycled, and reused within closed-loop mineral beneficiation circuits.

Fine-tuning the product streams is straightforward and can be handled quickly by plant operators during live continuous operation. Adjustable Splitters: Discharge splitters located at the bottom of the spiral trough allow precise position adjustments to cut concentrate, middlings, and tailings streams. Operational Variables: Performance can be optimized by adjusting feed slurry density, water flow rate, and pulp feed volume. Profile Selection: Troughs can be selected with different pitch ratios and cross slopes tailored specifically to fine, medium, or coarse mineral feeds.

Scalability is achieved through compact modular design and multi-start assembly configurations. Multi-Start Spirals: Available in single, twin, triple, or quadruple starts per column to multiply throughput without increasing equipment footprint. Spiral Banks Assembly: Multiple columns are clustered into modular spiral banks serviced by centralized pulp distributors and discharge launders. Footprint Efficiency: Delivers exceptionally high processing capacity per square meter of plant floor space, minimizing civil engineering costs.

Due to its static structure and lack of internal moving components, maintenance requirements are minimal. Routine Checks: Daily maintenance is limited to monitoring feed distributor balance, ensuring unblocked pulp nozzles, and checking splitter positioning. Wear Inspection: Periodic visual inspections of the polyurethane lining ensure prolonged wear protection against coarse feed slurry. Low Total Cost of Ownership: The combination of zero electricity, minimal spare parts inventory, and low labor demand ensures a rapid return on investment (ROI).
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