Aggregates

Dry sand-making process with powder classification

The dry reference process connects jaw and cone crushing, VSI sand making and screening with rotor powder classification and dust collection. Review it where process water is limited, then check feed moisture, clay and the required fines content against the wet washing alternative.

Prepare a process brief

Dry sand-making line

Combine crushing, shaping, screening and air classification to control fines in a dry process.

Process illustration

Dry sand-making line: line drawing of equipment, conveying and material flow — Process illustration · Equipment and layout depend on the projectView full-size drawing ↗

Equipment in the drawing

Hopper & feeder
Jaw crusher
Cone crusher
VSI sand maker
Vibrating screen
Rotor powder classifier
Bag dust collector

Solid: material flow · Dashed: oversize return · Dotted: dust-laden air

Process and equipment notes

Feeding

The material route starts at the hopper and feeding stage.

Vibrating feeder

Process outputs

Manufactured sand, graded aggregates and separated powder

Side streams & destinations

Return materialOversizeCrushing
Dust collectionDust-laden airDust collectorDMC pulse bag dust collector ↗

Oversize returns to crushing; dust-laden air enters collection.

Equipment by stage: Feeding — Vibrating feeder ； Crushing — Deep-chamber jaw crusher HP hydraulic cone crusher ； Sand making & screening — VSI vertical shaft impact crusher Circular vibrating screen ； Air classification — Rotor powder classifier ；

View the simplified flowsheet

Dry sand-making line simplified flowsheet — Simplified flowsheet · Open full image

When should a dry sand-making route be considered?

The catalogue dry route combines jaw and cone crushing, VSI sand making, screening, rotor powder classification and dust collection. It is a reference option where process water is limited and the project needs a defined method of controlling fines.

Check feed moisture, clay and the required sand fines content before assuming that the dry route fits. The flowsheet defines the stages and side streams; it does not establish a plant-wide throughput or a guaranteed fines percentage.

Catalogue reference: PDF page 39

Dry classification or wet washing: what changes?

The two catalogue routes share crushing, VSI sand making and screening. Their later treatment differs: the dry route classifies and collects powder; the wet route washes sand and recovers/dewaters the fine-sand stream. Compare those process duties against the material and site conditions.

Reference process choices after crushing and sand making
Selection question	Dry reference route	Wet reference route
How are fines handled?	Rotor powder classification and dust collection	Sand washing, fine-sand recovery and dewatering
Which side streams need a plan?	Separated stone powder and dust-laden air	Sand-bearing wash water and fine slurry
Which site inputs should be supplied?	Feed moisture/clay, required fines content, classifier airflow and dust extraction	Feed/clay conditions, sand grading, water supply and return-water/slurry handling

Catalogue reference: PDF page 39

What should a dry sand-plant enquiry include?

State the feed and finished-product requirements before selecting individual machine rows. A VSI capacity must include its feed arrangement; it is not a stated finished-sand yield or the capacity of the complete circuit.

Feed material, maximum size and grading, moisture and clay conditions.
Required manufactured-sand grading and fines content, target throughput and any required graded aggregates or separated-powder handling.
Existing jaw/cone/VSI and screen equipment, oversize-return connections, classifier airflow and dust-extraction layout.

Catalogue reference: PDF page 9, PDF page 39