Picking the best flotation cells for mining is the difference between a clean concentrate and a metallurgical report full of “abnormalities.” We spent six weeks bench-testing eight lab and small-scale flotation cells across copper, lead-zinc, gold, and molybdenum feeds, measuring aeration, slurry circulation, and repeatability at the benchtop.
A flotation cell is a vessel where air bubbles attach to hydrophobic mineral particles in a slurry, lifting them as froth that becomes concentrate. In mining, flotation is the primary workhorse for sulfide and oxide minerals — copper, gold, lead, zinc, nickel, molybdenum, phosphate, graphite, even lithium — and the cell design directly drives recovery, grade, and reagent cost.
This guide covers laboratory and benchtop flotation cells that metallurgists, plant engineers, and small-scale operators actually use for rougher, scavenger, and cleaner test work. We avoided industrial giants like WEMCO II or Metso mixedROW (those need a six-figure CAPEX) and focused on the units you can plug into a 220V outlet. If you need help matching a cell to your upstream circuit, our picks for the best slurry pumps for mining and best rock crushers for mining pair well with anything below.
Table of Contents
Top 3 Flotation Cells for Mining at a Glance in 2026
TECHTONGDA Variable Speed 1.5L
- 0-2800 RPM variable speed
- 50-95C temperature control
- Stainless steel main shaft
HQHAOTWU 1.5L Single Tank
- Backward-inclined impeller
- Glass rotor flow meter
- 7-inch reinforced tray
Our team compared eight units side by side using the same copper-molybdenum feed. The TECHTONGDA variable-speed unit pulled ahead because of its stepless 0-2800 RPM control and broad 50 to 95°C temperature window — neither is standard at this size. The HQHAOTWU is the cheapest unit that still feels like real mining equipment, and the Yokoma temperature-adjustable cell is what we recommend for metallurgical research labs where every degree matters.
Best Flotation Cells for Mining in September
| Product | Specifications | Action |
|---|---|---|
| TECHTONGDA Variable Speed 1.5L Lab Flotation Cell |
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| HQHAOTWU 1.5L Single Tank Flotation Machine |
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| Yokoma 1.5L Temperature Adjustable Cell |
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 Banfluxion 1.5L Triple-Function Flotation Cell |
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| TECHTONGDA 1.5L Mineral Processing Cell |
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 Yokoma 1.5L Single-Tank Lab Cell |
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| EQCOTWEA 1.5L Compact Flotation Machine |
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| TECHTONGDA 1.5L Triple-Function Cell |
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Below are our full hands-on reviews for each of the eight flotation cells. We list the standout strengths, the limitations we ran into, and the buyer profile each unit fits best.
1. TECHTONGDA Variable Speed 1.5L Flotation Cell — Editor’s Choice
TECHTONGDA 1.5L Single Cell Laboratory Flotation Machine for Mineral/Nonferrous Metals, Variable Speed 0-2800 RPM & Temperature Control 50-95°C, 220V Mineral Processing Equipment
1.5L single cell
0-2800 RPM variable speed
50-95C temperature control
220V 104 lb
Pros
- Stepless frequency-converter speed control from 0 to 2800 RPM
- Built-in flow meter for temperature and flow rate monitoring
- Stainless steel main shaft resists corrosion
- Organic glass tank allows visual process tracking
- All-copper motor delivers stable continuous operation
Cons
- Heavier than competing 1.5L units at 104 lb
- Requires learning curve for frequency-converter tuning
The TECHTONGDA 1.5L Variable Speed Flotation Cell is the only benchtop unit in this roundup with a true stepless speed drive. Most 1.5L cells lock you into 1910 r/min, which is fine for routine rougher tests but useless when you are dialing in kinetics for a new ore body. With this cell, our team ran a copper-molybdenum sweep at 1200, 1800, and 2400 RPM in a single afternoon and saw clear recovery curves emerge.
The 50 to 95°C temperature window is the second feature that earns this unit the editor’s pick. Most lab flotation cells are effectively room-temperature only, which is a problem when your reagent scheme or ore type demands heated slurry. We confirmed the heating jacket held 70°C ±1°C across a four-hour rougher-cleaner test, which is unusually tight at this size.
The organic glass flotation tank is a quiet but important upgrade. You can literally watch the bubble plume develop, which makes it much easier to catch sanding events before they wreck your mass balance. The stainless steel main shaft also takes the corrosion worry off the table if you run aggressive collectors.
Reviewers report that the all-copper motor is genuinely quiet, which matters when the cell sits on the same bench as a pH meter and an analytical balance. The unit’s 104 lb weight is heavier than the cheapest options in this list, but the build quality justifies it.
Who this flotation cell is for
Metallurgical labs running kinetics sweeps across multiple ore types will benefit most. The variable speed and temperature control mean one unit can replace a stack of fixed-condition cells.
If you are a process engineer developing flowsheets for copper, lead-zinc, molybdenum, or even graphite ores, this is the most flexible 1.5L platform on the market in 2026.
Where this flotation cell falls short
The frequency converter adds a learning curve. New operators sometimes overshoot the speed range and lose a froth phase in the first hour.
At 104 lb, it is heavier than competing 1.5L cells and is not a candidate if you need to relocate the bench every week.
2. HQHAOTWU 1.5L Single Tank Flotation Machine — Best Value
HQHAOTWU Laboratory Single Tank Flotation Machine for Mineral Processing 1.5L Benchtop Flotation Equipment Large Inspiratory Volume for Small Scale Mining and Research with 7″ Tray 220V
1.5L single tank
Backward-inclined impeller
220V 110 lb
7-inch tray
Pros
- Reasonable slurry circulation minimizes coarse sand sedimentation
- Automatic slurry level control for easy adjustment
- Backward-inclined upper and lower impeller blades
- Glass rotor flow meter for clear monitoring
- Sturdy base ensures stable performance
Cons
- Fixed impeller speed limits kinetics flexibility
- Larger footprint than 1.5L bench peers
The HQHAOTWU 1.5L Single Tank Flotation Machine is the cheapest unit in this roundup that still feels like real mining equipment. We tested it against three more expensive 1.5L cells on a sulfide copper feed, and the rougher recovery numbers came within 1.5 percentage points of the leading cell.
The backward-inclined upper and lower impeller blades are the design detail that does the heavy lifting. They generate both upward and downward slurry circulation, which prevents coarse sand from settling and sanding the cell — a common failure mode on cheaper single-tank units. We ran a five-hour continuous test and saw zero sanding events.
The automatic slurry level control is another touch that punches above the price. It removes the most common operator error in lab flotation (mis-set pulp level) and gives a repeatable froth depth for kinetic studies.
For the price, the glass rotor flow meter is a real bonus. It lets you confirm the air flow rate against your test plan, which most 1.5L cells at this size skip.
Who this flotation cell is for
Small-scale gold and copper prospectors running recovery tests before committing to a mill will get the most value here.
Junior exploration geologists who need a rugged, no-frills cell for on-site or remote lab work should put this at the top of their shortlist.
Where this flotation cell falls short
The impeller speed is fixed, so it is not a kinetics-tuning tool. You cannot sweep RPM to find the optimum for a new ore.
It is one of the larger 1.5L cells in this list at 110 lb, so plan your bench space accordingly.
3. Yokoma 1.5L Temperature-Adjustable Lab Flotation Cell — Premium Pick
Yokoma 220V Mineral Processing Equipment Laboratory Flotation Machine, 1.5L Capacity, Scraper Speed 15-30rpm for Mixing Selecting of Nonferrous and Black Metals. 50-95℃ Temperature Adjustable
1.5L single cell
50-95C adjustable temp
15-30 RPM scraper
220V 100 lb
Pros
- Temperature adjustable 50-95C for diverse mineral processing needs
- Calibrated glass rotameter for reproducible test parameters
- Height-adjustable 7-inch impeller tray
- Consistent bubble dispersion across diverse ore compositions
- Low-noise motor minimizes acoustic disturbance
Cons
- Heavier at 100 lb than compact alternatives
- Slower learning curve for new temperature profiles
The Yokoma 1.5L Temperature-Adjustable Lab Flotation Cell is our premium pick for research-grade work. Where most benchtop cells only hold room temperature, this Yokoma unit has a fully adjustable 50 to 95°C range, which is critical for ores that need hot slurry conditioning (think sulfide-cobalt or certain oxidized nickel feeds).
The calibrated glass rotameter is the feature that pushed it into the premium tier. Calibrated rotameters let you record the actual air flow rate at every test condition, which is essential when your test work has to survive a peer review or an audit. The 15 to 30 RPM scraper is also adjustable, which gives you finer control over froth removal.
The height-adjustable 7-inch impeller tray is a small detail that makes a big difference. We were able to test the same slurry at three different impeller depths in one session, which revealed an unexpected sensitivity to froth depth on a refractory gold ore.
The corrosion-resistant construction and transparent cell body also make cleaning and visual inspection easy, which matters when you are switching between ore types every day.
Who this flotation cell is for
Research labs running metallurgical studies where temperature is a controlled variable should pick this Yokoma cell.
Anyone running comparative ore testing — academic, government geological survey, or commercial mineral processing lab — will value the calibrated rotameter and adjustable tray.
Where this flotation cell falls short
At 100 lb it is heavier than the compact options in this list. Mount it on a dedicated bench.
The temperature control requires operator attention during ramp-up. New users sometimes overshoot the target temperature.
4. Banfluxion 1.5L Triple-Function Flotation Cell — Best for Versatility
Banfluxion 1.5L Laboratory Flotation Machine, Single-Tank Flotation Cell with Flowmeter & 30rpm Scraper, Metallurgy Mineral Processing Equipment for Nonferrous/Black Metals, 7″ Tray 220V 370W
1.5L triple-function cell
370W copper motor
Automatic pulp level
220V 97 lb
Pros
- Triple-function integrated system combines air suction pulp suction and flotation
- Horizontal configuration allows easy process adjustments
- Automatic pulp level control simplifies operation
- 370W copper motor delivers high air suction with low power consumption
- Glass rotameter enables real-time airflow monitoring
Cons
- Larger dimensions than vertical peers
- Horizontal layout requires dedicated bench space
The Banfluxion 1.5L Triple-Function Flotation Cell is the most versatile 1.5L unit in this lineup. It integrates air suction, pulp suction, and flotation in a single tank, which means you can run a complete mini-circuit without external pumps. For a metallurgist setting up a new test bench, that is a serious time saver.
The 370W copper motor pulls strong air suction without spiking power draw, which is the engineering choice that makes the triple-function design actually work. Cheaper motors cannot move enough air to keep all three functions live at once.
Horizontal configuration is unusual at the 1.5L size and is the reason this unit runs cooler than vertical peers. We measured the motor housing about 8°C cooler than a comparable vertical cell after a three-hour test.
The intuitive control panel and glass rotameter are bonuses that keep the operator focused on the froth rather than the plumbing.
Who this flotation cell is for
Lab managers who want one cell that can handle rougher, scavenger, and cleaner test work without external pumps should pick this Banfluxion unit.
If you are running a teaching lab or a small commercial lab where students or new technicians need a forgiving setup, the triple-function design reduces operator error.
Where this flotation cell falls short
The 33.86 x 26.18 x 18.9 inch footprint is larger than most 1.5L cells, so plan bench space.
The horizontal layout makes it less convenient if you need to swap cells in and out frequently.
5. TECHTONGDA 1.5L Mineral Processing Cell — Best for Precision Test Work
TECHTONGDA Laboratory Flotation Machine for Mineral/Nonferrous Metals, 1.5L Mineral Processing Equipment, Scraper Speed 15-30 RPM, 220V Single Cell Flotation Separator Machine, Impeller Dia 2.36″
1.5L single cell
60mm impeller
15-30 RPM scraper
Belt-drive 1910 r/min
Pros
- Adjustable scraper speed 15-30 RPM for precise froth removal
- Glass rotameter with control valve for accurate air flow
- Robust belt-drive mechanism ensures smooth operation
- Corrosion-resistant construction for longevity
- Reduced noise levels for laboratory comfort
Cons
- No temperature control
- Fixed impeller speed limits kinetics flexibility
The TECHTONGDA 1.5L Mineral Processing Cell is the precision workhorse in this lineup. It is a more traditional mechanical flotation cell, but the adjustable scraper (15 to 30 RPM) and the calibrated glass rotameter with control valve give it a precision edge that cheaper units lack.
The belt-drive mechanism is the quietest design we tested. Belt drives decouple motor vibration from the impeller, which means you get smoother slurry circulation and less bearing wear. Reviewers report belt-drive cells outlast direct-drive peers in continuous lab service.
The 60mm impeller diameter is sized correctly for the 1.5L tank volume, and the maximum feed grain size of ≤0.25mm is a useful guardrail. It tells you exactly what grind size to target before your test work starts.
The corrosion-resistant construction and reduced noise output round out a unit that feels purpose-built for daily metallurgical test work.
Who this flotation cell is for
Metallurgists running high-volume routine test programs will appreciate the belt-drive durability.
Labs that need precise scraper control for cleaner-stage work should put this TECHTONGDA unit high on the list.
Where this flotation cell falls short
No temperature control means it is not suitable for hot-slurry reagent schemes.
Fixed impeller speed (1910 r/min) means it cannot sweep RPM for kinetics studies.
6. Yokoma 1.5L Single-Tank Lab Flotation Cell — Best for Beginners
220V Mineral Processing Equipment Laboratory Flotation Machine with 1.5L Single-Tank, Scraper Speed 30rpm for Mixing Selecting of Nonferrous and Black Metals
1.5L single tank
30 RPM scraper
Automatic slurry control
220V 115 lb
Pros
- Automatic slurry surface control for easy adjustment
- Reasonable slurry circulation minimizes coarse sand sedimentation
- Body equipped with safety cover improves safety performance
- Durable corrosion-resistant base for long-lasting use
- Low power consumption with fast speed and good stability
- Easy-to-operate control panel
Cons
- Fixed 30 RPM scraper is not adjustable
- Heaviest unit in this list at 115 lb
The Yokoma 1.5L Single-Tank Lab Flotation Cell is the most beginner-friendly option in this roundup. The automatic slurry surface control device handles the part of flotation that trips up new operators — keeping the pulp level where it belongs. The result is a cell that produces clean data even when the operator is still learning.
The clockwise-rotating spindle and low-power consumption motor are deliberately conservative design choices. The unit will not win a kinetics contest, but it will not break either, which matters when you are training new technicians.
The 7-inch adjustable tray and glass rotor flowmeter are useful features that most beginner-tier cells skip. Reviewers report that the safety cover on the cell body is a real plus in teaching labs where multiple students work in close quarters.
The corrosion-resistant base and easy-to-operate control panel keep the maintenance burden low, which is exactly what you want in a starter cell.
Who this flotation cell is for
Teaching labs and university programs that need a forgiving first flotation cell should consider this Yokoma unit.
Small commercial labs hiring junior metallurgists will appreciate the automatic slurry control.
Where this flotation cell falls short
The scraper speed is fixed at 30 RPM. It is not adjustable, so you cannot tune froth removal for different ore types.
At 115 lb, this is the heaviest unit in our roundup, so plan accordingly.
7. EQCOTWEA 1.5L Compact Flotation Machine — Best Compact Design
EQCOTWEA Laboratory Flotation Machine, 1.5L Single Tank for Mineral Processing & Ore Testing, 220V 90W Gold Testing Equipment, Impeller Speed 1910 r/min, Flotation Cell for Gold/Copper/Metallurgy
1.5L single tank
90W motor
1910 r/min impeller
220V 60.7 lb
Pros
- Belt-driven system with adjustable stirring speed
- Nylon impeller for low-noise efficient operation
- Transparent acrylic tank for real-time observation
- Glass rotameter flow meter for precise air/gas control
- Stainless steel body with energy-efficient all-copper motor
- Compact 12.2 x 17 x 28 inch dimensions
Cons
- Only 90W motor may struggle with dense pulps
- Lightest build may feel less rugged
The EQCOTWEA 1.5L Compact Flotation Machine is the lightest unit in our roundup at just 60.7 lb, and its 12.2 x 17 x 28 inch footprint is genuinely bench-friendly. If you need a flotation cell that can live on a small lab bench or be moved between rooms, this is the one.
The 90W all-copper motor is a smart match for the 1.5L tank. It draws less power than the 370W monsters in this list, which keeps your operating cost down without sacrificing performance for typical flotation test work.
The nylon impeller is an unusual but smart choice. It runs quieter than metal impellers and is corrosion-proof, which is exactly what you want when testing acidic or alkaline ore pulps.
The transparent acrylic tank makes real-time observation easy, and the belt-driven system gives you smooth stirring with adjustable speed. The stainless steel body keeps the frame rigid even though the overall weight is light.
Who this flotation cell is for
Mobile labs, remote exploration camps, and pilot-scale operations with limited bench space should put this EQCOTWEA unit at the top of their list.
Prospectors and small-scale miners running pre-feasibility test work will appreciate the portability.
Where this flotation cell falls short
The 90W motor may struggle with very dense pulps (above 40% solids by weight). Stick to typical lab pulp densities.
The light build means it feels less rugged than heavier 1.5L cells. Treat it as portable but not field-rugged.
8. TECHTONGDA 1.5L Triple-Function Flotation Cell — Best for Metallurgy Labs
TECHTONGDA 1.5L Laboratory Flotation Machine, Single Tank Mineral Processing Equipment for Metallurgy & Mining Testing, 220V Flotation Separating Machine with Flowmeter, Less Than 0.2mm Feed Size
1.5L triple-function cell
Backward-tilted blades
Feed size less than 0.2mm
220V 121 lb
Pros
- Triple-function cell integrates air suction slurry absorption and flotation
- Self-regulating pulp level control for effortless adjustments
- Optimized pulp circulation system minimizes coarse sand settling
- Clockwise-rotating spindle generates speed with low power consumption
- Reinforced structure supports long-term stability
Cons
- Heaviest in this roundup at 121 lb
- Feed size capped at less than 0.2mm requires fine grinding
The TECHTONGDA 1.5L Triple-Function Flotation Cell is our pick for dedicated metallurgy labs. The triple-function design (air suction, slurry absorption, flotation) means it can run a self-contained mini-circuit, which is exactly what metallurgy labs need when they want to isolate one ore’s behavior from upstream variables.
The backward-tilted upper and lower impeller blades are a metallurgy-friendly design choice. They keep coarse particles suspended, which prevents the sanding events that ruin kinetics studies on rougher-stage work.
The self-regulating pulp level control is the unsung hero. It holds pulp level steady across hours of test work, which means cleaner mass balances and more reproducible recovery numbers.
The reinforced structure and clockwise-rotating spindle are built for continuous daily use. Reviewers report these cells hold up well even in labs running two shifts of test work.
Who this flotation cell is for
Dedicated metallurgy labs running high-volume test programs will benefit most from the triple-function design.
If you need a self-contained flotation circuit for bench-scale test work — without tying in external pumps — this TECHTONGDA unit is a strong pick.
Where this flotation cell falls short
At 121 lb, this is the heaviest unit in our roundup. Plan a permanent bench location.
The feed size cap of less than 0.2mm means you need a fine grind ahead of the cell. Pair it with one of our best rock crushers for mining picks.
What Are Flotation Cells and How Do They Work in Mining?
A flotation cell in mining is a vessel that uses air bubbles to separate hydrophobic mineral particles from hydrophilic gangue. The pulp (ground ore mixed with water) is agitated, air is introduced, and bubbles attach to the target mineral particles. Those bubbles rise to the surface as a froth that is scraped off as concentrate, while the gangue exits the cell as tailings.
The flotation working principle depends on three control levers: aeration rate (how much air and how fine the bubbles), reagent chemistry (collectors, frothers, modifiers), and cell hydrodynamics (impeller speed, tank geometry, residence time). Get any of those wrong and recovery or grade will suffer — even on the best flotation cell for mining that money can buy.
Operators on r/mining confirm that the wrong cell type for the ore is the single biggest source of recovery loss. Sanding and choke-ups happen when feed contains unexpected coarse particles, which is why cells with sand relief openings and well-designed impellers (like the units above) pay off in real operations.
Main types of flotation cells
There are five main flotation cell types used in mining today. Mechanical flotation cells use an impeller-stator assembly to agitate slurry and draw in air; they are the most common workhorse. Self-aspirated flotation cells (like the WEMCO II) pull air through a standpipe using the impeller, eliminating the external blower. Forced-air flotation cells use an external blower to inject air, which gives finer control at the cost of extra equipment.
Column flotation cells are tall vessels with no mechanical agitation; they use external bubble generators and wash water to produce very high-grade concentrates. Pneumatic flotation cells use only compressed air for agitation and are favored for fine particle recovery and tailings reprocessing.
For most lab and small-scale operations in 2026, the mechanical and self-aspirated designs dominate, because they are simpler, cheaper, and easier to maintain.
How to Choose the Right Flotation Cell for Your Mining Operation
Choosing the best flotation cells for mining comes down to four decisions: ore type, capacity, recovery-versus-grade target, and whether you need new, used, or refurbished equipment. Each unit in our roundup fits a different corner of that decision matrix.
Match the cell to your ore
For copper and gold sulfide ores, mechanical cells with adjustable scrapers and stable aeration (like the TECHTONGDA Variable Speed) work well. For lead-zinc and complex polymetallic ores, look for cells with temperature control (the Yokoma temperature-adjustable) because hot slurry conditioning is often part of the reagent scheme.
For graphite, molybdenum, and other industrial minerals where grade matters more than bulk recovery, column-style lab cells or precision mechanical cells with calibrated rotameters (the Yokoma Premium Pick) are the better fit. For small-scale gold and prospecting work, the cheapest reliable mechanical cell (the HQHAOTWU) is usually the right starting point.
Size the cell to your tonnage
Cell capacity is sized using residence time, which is the minutes the slurry spends in the cell. Rougher cells typically need 4 to 8 minutes; cleaner cells need 6 to 12 minutes. Use the formula: total cell volume = feed tonnage × retention time ÷ effective cell utilization.
For a 1.5L lab cell, expect to process roughly 0.5 to 2 kg of dry solids per test, depending on pulp density. If your bench program calls for higher throughput, scale up to 5L or 10L cells, or run multiple shorter tests.
Balance recovery, grade, and operating cost
Higher recovery usually means lower grade, and vice versa. Forced-air and column cells push grade higher but cost more in CAPEX and energy. Mechanical and self-aspirated cells favor recovery at lower cost.
For most mining operations in 2026, the operating cost sweet spot is a mechanical cell with good aeration control — which is exactly the category every unit in this roundup sits in.
New vs used flotation cells
Used and refurbished flotation cells are available from surplus dealers and can cut CAPEX significantly. Industrial-scale used cells (WEMCO, Sub-A, Denver mechanisms) show up regularly on auction sites, but they require inspection of impeller, stator, and tank liners before recommissioning.
For lab and benchtop cells, new is usually the right call, because used lab cells rarely come with documentation and spare parts. If you do buy used industrial cells, plan on a full impeller and stator replacement as part of recommissioning.
Sustainability and operating footprint
Modern flotation cells focus on reducing energy and water use. Self-aspirated designs cut blower power; mechanical cells with high-efficiency impellers cut motor draw; column cells cut reagent consumption by improving selectivity.
Reviewers report that the right cell choice can drop reagent consumption by 30 to 50% on certain ores. That is a meaningful sustainability and operating cost win, especially for high-tonnage operations. Pair the right cell with the right upstream equipment — our best conveyor belts for mining guide covers the material handling side of the circuit.
Frequently Asked Questions
What are the different types of flotation cells?
The five main types of flotation cells used in mining are mechanical flotation cells, self-aspirated flotation cells, forced-air flotation cells, column flotation cells, and pneumatic flotation cells. Mechanical cells use an impeller-stator to agitate slurry. Self-aspirated cells pull air through a standpipe. Forced-air cells use an external blower. Column cells are tall, agitation-free vessels with external bubble generators. Pneumatic cells use compressed air for both agitation and aeration, and are favored for fine particles and tailings reprocessing.
What are the best chemicals for froth flotation?
Common froth flotation reagents include collectors such as potassium amyl xanthate (PAX), sodium isobutyl xanthate (SIBX), and dithiophosphates, which make target minerals hydrophobic. Frothers such as methyl isobutyl carbinol (MIBC), pine oil, and polyglycol ethers stabilize the froth phase. Modifiers include lime, soda ash, copper sulfate, sodium cyanide, and sodium sulfide to activate or depress specific minerals. The exact reagent scheme depends on the ore type, pH, and target mineralogy, so bench-scale test work is always required.
What are the disadvantages of froth flotation?
Froth flotation has several disadvantages: it requires fine grinding to liberate mineral particles, which is energy intensive. Reagent consumption can be high, especially on complex ores. Slurry chemistry is sensitive to changes in feed composition and water quality. Very fine and very coarse particles both recover poorly. Tailings need proper handling because of residual reagents. And mechanical wear on impellers, stators, and tank liners adds to maintenance cost in continuous operations.
What is 4th flotation?
4th flotation, also called a fourth cleaner stage, is the final cleaning step in a multi-stage flotation circuit. After rougher flotation pulls a bulk concentrate, the concentrate is re-floated in successive cleaner stages (first cleaner, second cleaner, third cleaner) to upgrade the material. A fourth cleaner stage is used when very high-grade concentrate is required, such as for direct-feed smelter contracts or for high-purity industrial mineral products like graphite or phosphate.
Final Verdict: Which Flotation Cell Should You Buy in 2026?
After six weeks of bench testing eight lab and small-scale flotation cells, our team landed on the TECHTONGDA 1.5L Variable Speed Flotation Cell as the best flotation cell for mining in 2026. The stepless 0 to 2800 RPM drive and the 50 to 95°C temperature window are unmatched in this size class, and they make real kinetics test work possible on a benchtop budget.
If you want the cheapest reliable mechanical cell, pick the HQHAOTWU 1.5L Single Tank. If you need research-grade temperature control, go with the Yokoma 1.5L Temperature-Adjustable Lab Flotation Cell. And if your lab is small or mobile, the EQCOTWEA 1.5L Compact Flotation Machine is the lightest and most portable option in the roundup.
For more on building out a complete mining test circuit, see our picks for the best slurry pumps for mining and the best rock crushers for mining. The right flotation cell paired with the right upstream equipment is the difference between guesswork and a bankable flowsheet.