Industrial Centrifuge Machines
Centrifuges for Coal & Mineral Processing Vertical Horizontal Basket Systems
John Finlay offers a full range of industrial centrifuges basket centrifuges, decanter centrifuges, screen bowl and scroll discharge centrifuges built for reliable, high-efficiency dewatering in demanding coal preparation environments.
Definition & Overview
What are Centrifuges in Mining & Coal Processing?
In mining and coal processing, centrifuges, also called centrifuge machines, are high-speed dewatering devices that use centrifugal force to separate moisture from wet coal or mineral slurry after washing. They are essential in coal preparation plants (coal washeries) to achieve low product moisture levels before transportation and combustion.
Unlike vibrating screens, which dewater by gravity and vibration, centrifuges spin the material at high speed, generating forces many times greater than gravity dramatically reducing moisture content. John Finlay manufactures basket centrifuges (filtering centrifuges) for coarse and middling coal achieving 5–9% product moisture, and slime centrifuges for fine coal slurry achieving <16% product moisture.
John Finlay also supplies the Screen Bowl Centrifuge (JFH series) and Vertical Vibrating Scroll Discharge Centrifuge (JFCB series), both carrying four national patents and recognized as National Key New Products by China Building Material Group.
John Finlay Centrifuge | Key Performance Data |
|---|---|
Product Moisture (Basket) | 5–9% |
Product Moisture (Slime) | <16% |
Basket Size Range | 1000–1650 mm |
Capacity Range (Basket) | 100–450 t/h |
Feed Size (Basket) | 0.5–50 mm |
Feed Size (Slime) | 0–13 mm |
Main Motor Range | 30–110 kW |
Power Supply | 380/660V, P6, 50Hz |
4 (JFH & JFCB series) |
Product Overview
Types of Industrial Centrifuges
John Finlay’s complete centrifuge range covers every coal dewatering application from coarse coal basket centrifuges to fine slime decanter-type centrifuges and advanced screen bowl systems.
Horizontal Vibrating Basket Centrifuge
HLL SeriesScreen Bowl Centrifuge
JFH Series — 4 PatentsVertical Basket Centrifuge (Scraper)
FLL SeriesHorizontal Scraper Slime Centrifuge
FLL SeriesVertical Vibrating Scroll Discharge Centrifuge
JFCB Series — 4 PatentsFull Product Range
Vertical & Horizontal Basket Centrifuges
John Finlay’s complete centrifuge range with full technical specifications.
Horizontal vibrating basket centrifuge
John Finlay’s HLL series horizontal vibrating basket centrifuge is engineered for middling and clean coal dewatering. Constructed with high-alumina ceramics and premium imported wear-resistant materials for long-term durability. Feed size 0.5–50mm, product moisture 5–9%.
| Item | Model | Description | Feed Size (mm) | Main Motor | Oil Pump | Vibrator | Basket (mm) | Product Moisture | Capacity (t/h) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | HLL1100 WZ | 0.5–50 | 30kW, 380/660V, P6, Ip55, 50Hz, F | 0.75kW, 3 80/660, P4, IP55, 3PH, 50Hz, F | 3.7kW, 380/660V, P4 (1440rpm), IP65, 3PH, 50Hz, F | 1100 | 5–9% | 120 | |
| 2 | HLL1200 WZ | 0.5–50 | 37kW, 380/660V, P6, Ip55, 50Hz, F | 3.7kW, 380/660V, P4 (1440rpm), IP65, 3PH, 50Hz, F | 1200 | 5–9% | 150 | ||
| 3 | HLL1300 WZ | Horizontal vibrating middling & clean coal centrifuge | 0.5–50 | 37kW, 380/660V, P6, Ip55, 50Hz, F | 3.7kW, 380/660V, P4 (1440rpm), IP65, 3PH, 50Hz, F | 1300 | 5–9% | 180 | |
| 4 | HLL1400 WZ | 0.5–50 | 45kW, 380/660V, P6, Ip55, 50Hz, F | 4.0kW, 380/660V, P4 (1440rpm), IP65, 3PH, 50Hz, F | 1400 | 5–9% | 250 | ||
| 5 | HLL1500 WZ | 0.5–50 | 75kW, 380/660V, P6, Ip55, 50Hz, F | 8.4kW, 380/660V, P4 (1440rpm), IP65, 3PH, 50Hz, F | 1500 | 5–9% | 350 | ||
| 6 | HLL1650 WZ | 0.5–50 | 75kW, 380/660V, P6, Ip55, 50Hz, F | 8.4kW, 380/660V, P4 (1440rpm), IP65, 3PH, 50Hz, F | 1650 | 5–9% | 450 |
* Specifications from John Finlay’s product brochure. All models: 380/660V, 3PH, 50Hz power supply. Contact JFI for application-specific selection
Horizontal scraper (FLL WG) and vertical scraper (FLL LG)
John Finlay’s FLL series slime centrifuges are available in horizontal scraper (FLL WG) and vertical scraper (FLL LG) configurations for fine coal slurry applications. Feed size 0–13mm (horizontal) and 0–3mm (vertical), product moisture <16%.
Screen Bowl Centrifuge
The JFH Screen Bowl Centrifuge is engineered for efficient dewatering and recovery of –0.5mm coal fines. High-capacity processing with consistently low final moisture content, long wear life, and intelligent control integration. Six models with bowl sizes JFH800×1600 to JFH1600×2400.
| Model | Feed Size (mm) | Capacity (t/h) | Recovery (%) | Moisture (%) | Bowl Dia. (mm) | Bowl Length (mm) | Speed (r/min) | Motor (kW) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| JFH800×1600B | <0.5 | 10–15 | 20–40 | 14–24 | 800 | 1600 | 800–900 | 55 | 6,600 |
| JFH900×1800B | 15–25 | 900 | 1800 | 750–850 | 90 | 10,750 | |||
| JFH1100×1800B | 20–40 | 1100 | 1800 | 650–750 | 160 | 14,750 | |||
| JFH1200×1800B | 30–60 | 1200 | 1800 | 600–700 | 185 | 15,900 | |||
| JFH1400×2000B | 40–70 | 1400 | 2000 | 550–650 | 200 | 18,200 | |||
| JFH1600×2400B | 70–120 | 1600 | 2400 | 500–600 | 315 | 26,300 |
| Model | L | B | H | H1 | B1 | B2 | L1 | L2 | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JFH1600×2400B | 4735 | 2470 | 1370 | 2000 | 1630 | 1100 | 2300 | 1870 | 500 | 500 | 750 | 250 | 215 |
| JFH900×1800B | 5500 | 2904 | 1530 | 2500 | 1950 | 1280 | 2690 | 2082 | 540 | 770 | 1000 | 300 | 313 |
| JFH1100×1800B | 6090 | 3126 | 1700 | 2600 | 2000 | 1500 | 2729 | 2151 | 560 | 810 | 1060 | 300 | 299 |
| JFH1200×1800B | 6045 | 3196 | 1765 | 2700 | 2100 | 1600 | 2729 | 2151 | 560 | 810 | 1060 | 300 | 299 |
| JFH1400×2000B | 6255 | 3456 | 1905 | 2800 | 2300 | 1800 | 2930 | 2350 | 640 | 930 | 1220 | 340 | 300 |
| JFH1600×2400B | 7240 | 3747 | 2120 | 3100 | 2580 | 2000 | 3530 | 2810 | 710 | 1040 | 1370 | 380 | 370 |
* Specifications from John Finlay product brochure. Contact JFI for application-specific selection.
Vertical Vibrating Scroll Discharge Centrifuge (JFCB series)
The JFH Vertical Vibrating Scroll Discharge Centrifuge (JFCB series) is designed for dewatering and recovery of small coal or coarse slime. Compact vertical construction, high throughput with consistently low product moisture. All critical wear components engineered for extended service life. Eight model sizes from JFCB 720×400 to JFCB 1200×650.
| Model | Feed Size (mm) | Recovery (%) | Capacity (t/h) | Moisture (%) | Basket Dia. (mm) | Main Motor (kW) | Speed (rpm) | Vibrator (kW) | Vibr. Speed (rpm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| JFCB 720×400 A | 0.5–13 / 0.5–25 | 50 | — | 5–7 | 720 | 18.5 | 970 | 0.55 | 1390 | 3000 |
| JFCB 930×470 A | 100 | <30 | 930 | 45 | 980 | 0.75 | 1390 | 5170 | ||
| JFCB 1030×550 A | 150 | 1030 | 55 | 980 | 1.1 | 1400 | 6480 | |||
| JFCB 1150×600 A | 200 | — | 1150 | 75 | 1480 | 1.1 | 1400 | 7800 |
| Model | L | L1 | B | B1 | H | H1 | H2 | M1 | M2 | C | a | d |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JFCB 720×400 A | 2175 | 1400 | 1690 | 1560 | 1395 | 535 | 1800 | 190 | 245 | 1346 | 140 | 22 |
| JFCB 930×470 A | 2755 | 1800 | 2030 | 1900 | 1720 | 600 | 2250 | 250 | 310 | 1686 | 150 | 26 |
| JFCB 1030×550 A | 3010 | 1950 | 2250 | 2090 | 1935 | 580 | 2400 | 270 | 340 | 1862 | 165 | 32 |
| JFCB 1150×600 A | 3265 | 2110 | 2460 | 2280 | 2020 | 650 | 2600 | 300 | 360 | 2030 | 180 | 32 |
* Specifications from John Finlay product brochure. Contact JFI for application-specific selection.
Working Principle
How Centrifuges Work in Coal Processing
Understanding the centrifuge machine’s working principle is essential for coal washery engineers selecting dewatering equipment for preparation plants.
02
Centrifugal Force
03
Separation
04
Discharge
Technical Advantages
Advantages of Industrial Centrifuges in Coal Processing
John Finlay's centrifuge machines deliver measurable performance advantages over conventional vibrating screen dewatering — across moisture reduction, throughput, reliability and operating cost.
Superior Moisture Reduction
Basket centrifuges achieve 5–9% product moisture far lower than vibrating screen dewatering (typically 15–25%). Lower moisture means higher calorific value, lower freight cost, and better combustion performance for thermal coal.
High-Capacity Dewatering
HLL basket centrifuges process up to 450 t/h in a single unit. JFH Screen Bowl Centrifuges handle up to 120 t/h of –0.5mm coal fines. JFCB scroll discharge models process up to 200 t/h covering the full coal size range in a single plant
Exceptional Wear Resistance
Constructed using high-alumina ceramics and premium imported wear-resistant materials. All critical wear components basket, scraper, bell hood, outlet protection rings engineered for extended service life under harsh slurry conditions.
Stable, Low-Noise Operation
Adjustable vibration amplitude ensures optimal performance across varying coal grades. Low noise design with corrosion resistance and mechanical reliability suitable for 24-hour continuous operation in coal preparation plants.
Smart Automation (Optional)
Intelligent Early Warning Health System: real-time data collection, anomaly detection, automated maintenance alerts. Reduces manual patrols and spot checks. Predictive maintenance tools reduce unscheduled downtime and labor costs significantly.
Patented Technology
JFH Screen Bowl and JFCB Scroll Discharge Centrifuges each carry four national patents. Both series are recognized as National Key New Products by China Building Material Group and Tangshan City, reflecting proven innovation and commercial validation.
Applications in Coal and Mineral Processing
John Finlay's industrial centrifuge machines serve critical dewatering and recovery duties across coal washery, fine coal beneficiation, and mineral processing plants.
Middling Coal Dewatering
HLL basket centrifuges dewater wet middling coal from dense media circuits achieving 5–9% moisture, reducing handling costs, and improving downstream coal quality for blending or direct sale.
Clean Coal Dewatering
Horizontal vibrating basket centrifuges dewater clean coal product from dense media separation essential for achieving specification moisture levels for coking coal (to steel mills) and thermal coal (to power stations).
Fine Coal Slurry Recovery
FLL slime centrifuges and JFH Screen Bowl Centrifuges recover and dewater fine coal slurry (0–13mm, and –0.5mm) that would otherwise report to tailings significantly improving overall plant yield and reducing waste.
Coarse Slime Beneficiation
JFCB Vertical Vibrating Scroll Discharge Centrifuges handle coarse slime (0.5–25mm) dewatering combining high throughput with consistently low product moisture for coal products entering the fine coal circuit.
Coal Preparation Plants (India)
John Finlay centrifuges are supplied to Coal India subsidiaries (BCCL, SECL, MCL, CCL) and private coal mining companies engineered for the difficult high-ash, high-moisture Indian coal grades characteristic of major Indian coalfields.
Mineral Processing Dewatering
Industrial centrifuge machines for dewatering mineral concentrates in iron ore, chrome, and other mineral processing plants providing reliable, high-rate solid-liquid separation for downstream processing.
About John Finlay
Centrifuge Manufacturer in India
Why John Finlay?
John Finlay is a leading centrifuge manufacturer offering industrial centrifuge machines for coal washing, fine coal recovery, and mineral processing backed by 50+ years of coal washery experience and 130+ completed projects.
Centrifuge Machines | Frequently Asked Questions
Common questions from process engineers, plant operators, and procurement teams about industrial centrifuge selection for coal washery and mineral processing.
In mining and coal processing, centrifuges are high-speed dewatering machines that use centrifugal force to remove moisture from wet coal or mineral slurry after washing. They achieve significantly lower product moisture levels than vibrating screen dewatering, John Finlay’s basket centrifuges achieve 5–9% product moisture, and slime centrifuges achieve <16%, enabling lower transport costs, higher calorific value, and better combustion performance for coal. Types include basket centrifuges (filtering centrifuges), decanter-type slime centrifuges, screen bowl centrifuges, and scroll discharge centrifuges.
A basket centrifuge (also called a perforated basket centrifuge or filtering centrifuge) uses a rotating perforated basket, moisture passes through the perforations while coal solids are retained and discharged by vibration or scraper. It handles coarser coal (0.5–50mm) and achieves 5–9% product moisture. A decanter centrifuge (decanter separator) uses a solid bowl with a scroll conveyor to continuously separate and discharge fine solids from slurry, suited for finer material (0–13mm). John Finlay’s HLL series are basket centrifuges; the FLL series are scraper type slime centrifuges used for fine coal.
A vertical basket centrifuge (vertical centrifuge) has its basket axis oriented vertically feed enters from the top, and dewatered solids are discharged downward. John Finlay’s FLL1200L G is a vertical scraper slime centrifuge for very fine coal (0–3mm), capacity 80 t/h, 55kW motor. A horizontal basket centrifuge (such as John Finlay’s HLL series) has its basket axis horizontal with a vibrating discharge mechanism, better suited for coarser coal (0.5–50mm) at higher throughputs (up to 450 t/h). The choice depends on feed size, throughput requirement, and plant layout constraints.
In coal processing, a high speed centrifuge refers to any centrifuge operating at speeds sufficient to generate high centrifugal force, typically basket centrifuges (HLL series) and scroll discharge centrifuges (JFCB series), which spin at 970–1480 rpm. The JFH Screen Bowl Centrifuge operates at 500–900 rpm, depending on bowl size. Higher speeds generate greater centrifugal force, reducing product moisture. John Finlay’s JFCB series achieves 5–7% moisture for coarse slime at speeds up to 1480 rpm.
John Finlay Eng. & Tech. Group of Companies is a global supplier of equipment for coal washing, founded in 1974 in Brisbane, Australia, with operations in India. With 130+ coal washery projects completed and 50+ years of experience, John Finlay supplies industrial centrifuge machines to Coal India subsidiaries (BCCL, SECL, MCL, CCL) and private coal mining companies across India and globally. John Finlay’s JFH and JFCB centrifuge series each carry four national patents.