Spiral Chute

Pitch Distance

360mm--720mm

Spirals

1, 2, 3, or 4 starts per column

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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Spiral Chute – Product Overview

◎The Gravity Spiral Concentrator, also known as a Spiral Chute or Spiral Separator, is an efficient gravity separation machine for wet beneficiation and concentration of fine mineral particles. It uses natural gravity, centrifugal force, and hydrodynamic flow to separate minerals according to specific gravity, with zero electrical power required during operation.

◎The spiral concentrator features a heavy-duty fiberglass reinforced structure with a durable polyurethane lining, providing excellent wear resistance and long service life. With no moving parts, it requires minimal maintenance and helps reduce downtime and operating costs.

◎During operation, slurry flows continuously along the spiral channel, creating a controlled helical flow that stratifies minerals by density. Heavy valuable minerals move toward the inner part of the spiral, while lighter gangue is carried toward the outer flow zone for effective separation.

◎The spiral chute is widely used for iron ore, chromite, ilmenite, zircon, monazite, tin, tungsten, gold, and other heavy minerals. It is also suitable for silica sand beneficiation. With zero power consumption, low water requirements, simple operation, and low maintenance costs, it provides an economical and eco-friendly solution for mineral processing plants.

What is the working principle of the Spiral Chute?

◎The Gravity Spiral Concentrator is an advanced and eco-friendly gravity separation machine designed for the wet classification and concentration of fine mineral particles from 0.03 mm to 2.0 mm. It operates without electrical power, using the combined effects of gravity, centrifugal force, and hydrodynamic flow to separate minerals according to their specific gravity.

◎During operation, slurry flows continuously down the polyurethane-lined helical trough. Under the action of the spiral flow, heavy valuable minerals gradually migrate toward the inner section of the spiral, while lighter gangue particles move toward the outer edge. This natural stratification provides efficient and stable separation of valuable minerals from waste materials.

◎The spiral chute features a durable fiberglass reinforced structure and excellent resistance to slurry abrasion, ensuring reliable performance and a long service life in demanding processing environments. Its simple static design has no moving parts, which significantly reduces maintenance requirements, operating downtime, and overall costs.

◎The Gravity Spiral Concentrator is widely used for the beneficiation of iron ore, gold, ilmenite, zircon, chromite, silica sand, and other heavy minerals. Adjustable discharge splitters allow operators to accurately separate concentrate, middlings, and tailings according to processing requirements. With zero power consumption, low maintenance, a compact footprint, and continuous operation, the spiral concentrator provides a cost-effective solution for modern mineral processing plants worldwide.

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

Model & Specifications	Outer Diameter (mm)	Pitch Distance (mm)	Pitch-to-Diameter Ratio	Cross Slope /(°)	Number of Spirals	Turns per Spiral	Feed Particle Size/mm	Feed Volume Rate/m3·h-1	Pulp Density/%	Capacity/t·h-1	Overall Dimensions (L×W×H)/mm	Weight/kg
LL-400×180	400	180	0.4	9	1	5	0.2~0.02	0.1~0.2	30~60	0.04~0.08	460×460×1200	20
LL-400×240	400	240	0.6	9	2	5	0.2~0.4	0.1~0.2	460×460×1500	30
LL-600×270	600	270	0.45	9	2	5	1~2	0.5~0.6	700×700×2000	80
LL-600×360	600	360	0.6	9	3、2	5	2~3	0.8~1.2	700×700×2600	100
LL-600×450	600	450	0.75	9 、15、21	5	3~4	1.0~1.4	700×700×3000	120
LL-900×405	900	405	0.45	9	3、2	5	0.3~0.03	3~5	30~60	1.5~2.5	1060×1060×3300	350
LL-900×540	900	540	0.6	9	4、3	5	5~7	2-3	1060×1060×4000	400
LL-900×675	900	675	0.75	9	5	7~9	2.5-3.5	1060×1060×4650	450
LL-1200×540	1200	540	0.45	9	3、2	5	7~11	3~4	1360×1360×4330	600
LL-1200×720	1200	720	0.6	9	4、3	5	10~14	4~6	1360×1360×5230	650
LL-1200×900	1200	900	0.75	9	5	12~16	5~7	1360×1360×6130	700
U-1500X675	1500	675	0.45	9	4	5	0.8~0.037	14	30~45	8	1800×1800×4650	800
U-1500×900	1500	900	0.6	9	4	5	0.8~0.037	15	30~45	8.5	1800×1800×6130	850
DL-2000	2000	1200	0.6	9	2~3	3.5~4	4~0.04	50	15~45	15~40	2300×2300×6500	900

Model & Specifications

Outer Diameter (mm)

Pitch Distance (mm)

Pitch-to-Diameter Ratio

Cross Slope /(°)

Number of Spirals

Turns per Spiral

Feed Particle Size/mm

Feed Volume Rate/m3·h-1

Pulp Density/%

Capacity/t·h-1

Overall Dimensions (L×W×H)/mm

Weight/kg

LL-400×180

400

180

0.4

0.2~0.02

0.1~0.2

30~60

0.04~0.08

460×460×1200

LL-400×240

400

240

0.6

0.2~0.4

0.1~0.2

460×460×1500

LL-600×270

600

270

0.45

1~2

0.5~0.6

700×700×2000

LL-600×360

600

360

0.6

3、2

2~3

0.8~1.2

700×700×2600

100

LL-600×450

600

450

0.75

9 、15、21

3~4

1.0~1.4

700×700×3000

120

LL-900×405

900

405

0.45

3、2

0.3~0.03

3~5

30~60

1.5~2.5

1060×1060×3300

350

LL-900×540

900

540

0.6

4、3

5~7

2-3

1060×1060×4000

400

LL-900×675

900

675

0.75

7~9

2.5-3.5

1060×1060×4650

450

LL-1200×540

1200

540

0.45

3、2

7~11

3~4

1360×1360×4330

600

LL-1200×720

1200

720

0.6

4、3

10~14

4~6

1360×1360×5230

650

LL-1200×900

1200

900

0.75

12~16

5~7

1360×1360×6130

700

U-1500X675

1500

675

0.45

0.8~0.037

30~45

1800×1800×4650

800

U-1500×900

1500

900

0.6

0.8~0.037

30~45

8.5

1800×1800×6130

850

DL-2000

2000

1200

0.6

2~3

3.5~4

4~0.04

15~45

15~40

2300×2300×6500

900

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).

Product Inquiry

Spiral Chute

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.

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Spiral Chute

Spiral Chute – Product Overview

Zero Energy Consumption & Low OPEX

Efficient Separation of Fine Minerals

Superior Wear & Erosion Resistance

Precise Grade Control with Adjustable Splitters

Compact Footprint & Modular Scalability

Spiral Chute Features and Advantages

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

What is the working principle of the Spiral Chute?

Product Photos

Specification

RECOMMENDED CRUSHING, SCREENING AND MINERAL PROCESSING EQUIPMENT

EXPLORE MORE PRODUCTION LINE SITE PROJECTS

Common Problems

Product Inquiry

Our Website

Spiral Chute

Spiral Chute – Product Overview

Zero Energy Consumption & Low OPEX

Efficient Separation of Fine Minerals

Superior Wear & Erosion Resistance

Precise Grade Control with Adjustable Splitters

Compact Footprint & Modular Scalability

Spiral Chute Features and Advantages

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

What is the working principle of the Spiral Chute?

Product Photos

Specification

RECOMMENDED CRUSHING, SCREENING AND MINERAL PROCESSING EQUIPMENT

EXPLORE MORE PRODUCTION LINE SITE PROJECTS

Common Problems

Q1:What types of minerals and ores can be processed with a Gravity Spiral Concentrator?

Q2:What is the optimal feed particle size range and feed pulp density for spiral chutes?

Q3:How does the gravity spiral concentrator operate with zero power consumption?

Q4:How durable is the spiral trough surface against high-abrasion slurry?

Q5:Are chemical reagents required, and what are the environmental benefits?

Q6:How do plant operators adjust separation efficiency, mineral grade, and recovery rates?

Q7:How is high processing capacity achieved in large-scale industrial plants?

Q8:What are the primary maintenance requirements and long-term operating costs?

Product Inquiry

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