0.001 g/cm³
Density Sensor Accuracy
1.15–1.65 g/cm³
Separation Density Range
50–170 m³/h
Feed Rate Range
5 (JFE-18 to JFE-36)
Models Available
DEFINITION & OVERVIEW
What is a Teetered Bed Separator?
The John Finlay Teetered Bed Separator is a high-efficiency settling and interference separation system that benefits coal and minerals through precise density-based separation. A rising water flow creates a controlled, turbulent fluidized bed; coarse slime sorts by density within that bed, reporting to overflow or underflow depending on whether it's lighter or denser than the separation density set for the run.
The system is built around automated control rather than manual adjustment. A high-precision KOSO electric actuator handles discharge with zero positioning lag, an IP68-rated density sensor monitors the bed in real time to an accuracy of 0.001 g/cm³, and a Siemens PLC-based control system ties it together with a 0.22 microsecond instruction time fully automated regulation that eliminates the manual tuning a simpler separator would need.
Five models cover a feed range from 50 to 170 m³/h, all operating across the same 1.15 to 1.65 g/cm³ separation density range and 0.15 to 2 mm feed granularity. The model selection is a capacity decision, not a duty-type decision, since the separation characteristics stay consistent across the range.
Automated Density Control
IP68 density sensor accurate to 0.001 g/cm³, feeding a Siemens PLC system with 0.22μs instruction time for fully automated regulation.
Zero-Lag Discharge Control
High-precision KOSO electric actuator with zero positioning lag, IP65 protection, and only 150W power draw.
Fluidized Bed Stability
Ultra-wear-resistant polyurethane turbulence plugs distribute upward water flow evenly, preventing blockages while enhancing stratification.
Parameter | Value |
|---|---|
Sampling Method | Rising water flow, controlled turbulent fluidized bed |
Separation Density Range | 1.15 – 1.65 g/cm³ |
Feed Granularity | 0.15 – 2 mm |
Feed Concentration | 400 – 500 g/L |
Density Sensor Accuracy | 0.001 g/cm³ (IP68-rated) |
Actuator | KOSO electric, zero positioning lag, IP65, 150W |
Control System | Siemens PLC, 0.22μs instruction time |
Feed Rate Range (across 5 models) | 50–170 m³/h |
KEY FEATURES
Key Features & Performance Highlights
Six features from John Finlay's own product documentation: every figure below is real, not estimated.
Inline Feed System for Enhanced Stability
Ensures a uniform and stable slurry flow, minimizing turbulence that could disrupt the sorting process, and promoting consistent operation and improved process efficiency.
Ultra-Wear-Resistant Polyurethane Turbulence Plugs
Anti-blocking, high-durability polyurethane plugs regulate turbulence and evenly distribute upward water flow, enhancing stratification while preventing blockages.
Advanced Fluidized Material Bed
A next-generation fluidized bed stabilizes material layering during separation, ensuring high recovery rates and consistent performance under varying feed conditions.
High-Precision KOSO Electric Actuator
Zero positioning lag with high accuracy, IP65 protection, and only 150W power draw low power consumption with seamless integration into automation systems for precise discharge valve control.
High-Accuracy Density Sensor
IP68-rated sensor for real-time bed density monitoring, accurate to 0.001 g/cm³, the precision behind consistent product quality and recovery.
Siemens PLC-Based Intelligent Control
Ultra-fast signal processing at 0.22μs instruction time, fully automated regulation eliminating manual adjustments, and integration with plant-level monitoring for smart feedback control.
WORKING PRINCIPLE
How the Teetered Bed Separator Works
Automated sensing and control keep the fluidized bed at the correct separation density continuously, not just at setup.
Stable Feed Entry
The inline feed system delivers a uniform, stable slurry flow into the separator, minimizing turbulence at the entry point.
Fluidized Bed Formation
Rising water flow, distributed evenly by wear-resistant polyurethane turbulence plugs, creates a controlled, turbulent fluidized bed.
Density-Based Stratification
Material stratifies within the fluidized bed by density across a 1.15 to 1.65 g/cm³ separation density range.
Continuous Density Monitoring
An IP68-rated density sensor monitors bed density in real time to an accuracy of 0.001 g/cm³, feeding data continuously to the control system.
Automated Discharge Control
The Siemens PLC system processes sensor data at 0.22μs instruction time and drives the KOSO electric actuator to control discharge with zero positioning lag, automatically holding the correct separation density.
TECHNICAL SPECIFICATIONS
Teetered Bed Separator | Full Specification
Real specifications for all five models, sourced directly from John Finlay’s product brochure.
Parameter | JFE-18 | JFE-21 | JFE-24 | JFE-30 | JFE-36 |
|---|---|---|---|---|---|
Feed Amount (m³/h) | 50-60 | 70-80 | 90-100 | 110-130 | 140-170 |
Feed Concentration (g/L) | 400-500 | 400-500 | 400-500 | 400-500 | 400-500 |
Feed Granularity (mm) | 0.15-2 | 0.15-2 | 0.15-2 | 0.15-2 | 0.15-2 |
Separation Density (g/cm³) | 1.15-1.65 | 1.15-1.65 | 1.15-1.65 | 1.15-1.65 | 1.15-1.65 |
Actuator Drive Mode | Electric-Hydraulic | Electric-Hydraulic | Electric-Hydraulic | Electric-Hydraulic | Electric-Hydraulic |
Actuator Power (kW) | 0.55 | 0.75 x 3 | 1.1 x 3 | 2.2 x 3 | 2.2 x 3 |
4.7 | 5.2 | 6.3 | 8.5 | 9.9 |
COMPARISON
Teetered Bed Separator vs. Coarser Fine-Coal Separation
Teetered Bed Separator
Coarser Separation Technologies
Applications of the Teetered Bed Separator
Coarse slime beneficiation is the named application in John Finlay's own product documentation, with a feed range and density range that support fine coal and middling duty specifically.
Coarse Slime Beneficiation
The direct, named application has high recovery rates and reduced operating costs on coarse slime that other technologies handle less precisely.
Fine Coal Separation
The 0.15–2mm feed granularity range and 1.15–1.65 g/cm³ separation density support fine coal duty specifically.
Middles Reprocessing
A sharp, automated cut-point recovers additional value from middling streams other technologies may not separate as precisely.
High-Value, High-Precision Applications
Automated density control to 0.001 g/cm³ accuracy suits applications where the economics justify precision over raw throughput.
About John Finlay
Coal Washery Equipment Supplier in India
Why John Finlay?
0.001
g/cm³ Density Accuracy
Real-time bed density monitoring via an IP68-rated sensor, feeding a Siemens PLC control system.
130+
Coal Washery Projects
Completed EPC projects worldwide, including Asia’s largest coking coal washery at 30 MTPA.
EPC
Full Circuit Supply
Supplied as part of complete process equipment packages for both coal and non-coal mineral processing circuits.
IN
India-Based Support
Manufactured at Hefei John Finlay Mining Equipment Co., Ltd. and supported locally in India for installation, commissioning, spares and service.
Teetered Bed Separator | Frequently Asked Questions
Common questions from engineers in coal washery processes evaluating automated density separation.
It separates coarse slime and fine coal by density, using a rising water flow to create a controlled fluidized bed. Material stratifies by density within the bed and discharges automatically based on real-time density monitoring.
An IP68-rated sensor monitors bed density to an accuracy of 0.001 g/cm³, feeding a Siemens PLC control system that automatically adjusts discharge no manual tuning required.
1.15 to 1.65 g/cm³ across all five models, with 0.15 to 2 mm feed granularity.
Five models, JFE-18 through JFE-36, covering feed rates from 50 to 170 m³/h. Model selection is a capacity decision; separation characteristics are consistent across the range.
A KOSO electric actuator controls discharge with zero positioning lag, IP65 protection, and only 150W power draw, driven automatically by the PLC based on real-time density readings.
Not sure which Teetered Bed Separator model fits your throughput?
Our engineers can match the feed rate, density range and your fine coal characteristics to the right model.
Talk to an Expert