Precision Separator / Classification & Separation
LNPE air classifiers separate powder according to particle size, density and morphology. The rotating classifying wheel generates a centrifugal field, while the carrier airflow supplies an opposing drag force.
Air-classification system · Equipment illustration
Process Role
Particle classification
Separation Basis
Particle size and density
Cut Control
Wheel speed and airflow
System Type
Airflow and classifying wheel
Large or heavy particles experience a dominant centrifugal force, are flung outward beyond the wheel, and descend along the chamber wall to the coarse-product outlet.
Small or light particles encounter a weaker centrifugal force; the drag of the airflow prevails, steering them through the wheel vanes into the fine-product stream.
Precision separation by particle size, density, and morphology
CFD-optimised airflow, solids concentration, and pressure profile for each design
Adjustable cut conditions with separate coarse and fine product recovery
Multiple interchangeable classifier-wheel geometries for efficient handling of diverse powders
Explore equipment variants, line modules and selection guidance by processing task.
In dry classification, larger or heavier particles tend towards the coarse outlet under centrifugal action, while smaller or lighter particles follow the gas through the wheel. Size, density, shape and agglomeration all influence separation; a classifier is not a sieve with one fixed cut size for every material. Stable feeding and adequate dispersion are prerequisites for performance assessment.
Information needed for selection
Provide full feed size distribution, density, shape, agglomeration, moisture, coarse-removal or dedusting targets, desired recovery at each outlet and throughput.
One coarse/fine separation provides a main cut point. A narrow fraction may require coarse removal followed by fine removal, or a different sequence based on the feed distribution. Each stage changes the next stage's concentration and size distribution. Stage count should follow mass balance and recycle load, rather than simply the number of products.
Information needed for selection
Submit each product's size window, expected mass fraction, feed variability, cross-fraction limits, conveying arrangements and available space.
Closed-loop classification primarily changes the distribution of a powder population rather than grinding it further. Protective gas carries material through the classifier; coarse and fine products are collected separately and filtered gas recirculates. It shares sealing, monitoring and gas-conditioning requirements with inert jet milling, but has a different objective and energy input.
Information needed for selection
Provide size distribution, density, magnetic behaviour, atmosphere requirements, separation targets, collection method and upstream/downstream pressures.
A specialist name can describe an action mechanism, a system arrangement or an industry application. First establish whether the task is milling, deagglomeration, classification or morphology control, then compare the action and downstream handling. Historical names help locate the technical discussion; the proposal defines the current series, configuration and supply scope.
Information needed for selection
Provide a historical model or equipment photo if available, material information, end use, target size/quality, current issues and utilities.
Equipment specifications depend on the feed and system conditions. These inputs establish a comparable trial plan and technical configuration.
Series and configuration references
LNC · O-Sepa · LNCST
The selection proposal defines specifications, combinations and supply scope.
| Input | Used to establish |
|---|---|
| Feed identity, composition, size and moisture | Milling/dispersion difficulty, pretreatment and feeding |
| Target D10/D50/D90 and upper/lower limits | Milling intensity, classifier cuts and fines control |
| Output, batches and operating hours | Equipment size, buffers, continuous duty and line rate |
| Purity, magnetic impurities, temperature and morphology | Contact materials, atmosphere and tests |
| Gas/steam pressure, temperature, flow and quality | Utilities, conditioning and protective circuits |
| Power, footprint and maintenance access | Layout, interfaces and serviceability |
| Stream yields, energy boundaries and test methods | Trial mass balance and acceptance conditions |
| Upstream discharge and downstream collection/packing | Supply scope and process handoff |
Understand D10/D50/D90, cut size, yield, tap density, specific surface area and system-energy boundaries.
One size or efficiency number cannot describe a powder process. Measurement basis, dispersion, sampling location, feed and operating conditions define its meaning. Technical data should state what is measured, how it is measured and which stream/system boundary it represents.
These are the sizes at which the cumulative distribution reaches 10%, 50% and 90% on the stated basis. Laser diffraction commonly reports a volume distribution; specify volume, number or mass basis and dispersion conditions. Equal D50 values do not imply equal coarse and fine tails.
Cut size characterizes how particles of a given size partition between coarse and fine streams. Classification-efficiency definitions vary; provide the calculation and feed/product masses. Neither is the same quantity as product D50.
Yield may mean the mass of the target size fraction relative to feed; recovery may refer to total powder or a target component. Define numerator, denominator and treatment of recycle and retained material.
Sphericity describes similarity to a sphere in three dimensions and is not identical to two-dimensional image circularity. Aspect ratio can compare long/short axes or diameter/thickness for platelets. State imaging sampling and calculation methods.
Tap density is powder mass per settled volume under a specified tapping procedure; specific surface area is surface area per unit mass. Size, shape, porosity and methods influence both. Neither alone establishes electrochemical or other functional performance.
Low temperature needs a measurement point and run duration. Contamination control requires contact materials, analytes and detection limits. Specific energy uses acceptable product mass as its denominator and states inclusion of compression, steam, classification, collection and drying.
These links open video pages on the original website. Read them alongside the equipment series; layout and configuration follow the project proposal.
Continue comparing LNPE process equipment and solution paths.
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