01Manufactured Sand Production
Producing manufactured sand for concrete and mortar from pre-crushed stone. Fines content and grading are adjusted together with screening and, if needed, washing.
Mining and Mineral ProcessingVertical Shaft Impact Crusher (VSI) – Sand and Fine Aggregate
PRO MAKINA · Vertical Shaft Impact Crusher (VSI)
- Crushing principle
- Rotor acceleration and impact
- Stage
- Usually tertiary / sand production
- Product
- Manufactured sand and fine aggregate
- Wear parts
- Rotor tips and internal liners
Overview
Crushing by Impact after Rotor Acceleration
In a vertical shaft impact crusher (VSI), material drops from the top feed opening into the centre of a rotor spinning at high speed on a vertical shaft. The rotor accelerates the material and throws it outwards; it breaks on impact with surfaces in the crushing chamber or with a bed of material.
Unlike jaw or hammer crushers, this crushing method targets fine aggregate and manufactured sand production. Size distribution and particle shape depend on rotor speed, rotor and chamber arrangement and the properties of the feed.
A VSI usually works after primary and secondary crushers, in closed circuit with screening. Feed size, abrasiveness and moisture of the material are decisive in selecting the rotor and wear parts.
01Process Flow
VSI Crusher Material Flow
The diagram shows the typical flow in which the VSI accelerates material in the rotor, breaks it by impact and sends it to the screening circuit. Screening and return line are separate equipment.
Scroll horizontally to view the full diagram.
Material line
- 1
Material feeding: Pre-crushed material falls through the feed opening into the rotor centre.
- 2
Rotor acceleration: The rotor on the vertical shaft accelerates the material and throws it out.
- 3
Impact crushing: Material breaks on impact with chamber surfaces or a material bed.
- 4
Product discharge: Crushed product is discharged below and goes to the screening circuit.
Oversize material from the screen can be returned to the crusher; the circuit arrangement depends on the plant concept.
02Applications
VSI Crusher Applications
01
02Fine Aggregate and Chips
Final-stage crushing of fine aggregate fractions in aggregate plants. The crusher is sized together with the screening circuit.
Screening and Classification
03Improving Crushed Stone Shape
Final-stage crushing aimed at improving the particle shape of crushed stone fractions. The achievable shape depends on the material and must be confirmed by testing.
Conveying Systems
03Design & Manufacturing
Custom VSI Crusher Design and Manufacturing
PRO MAKINA engineers VSI crushers around feed size, abrasiveness, target product distribution and capacity. Rotor and chamber arrangement, wear parts, shaft and bearings, drive and vibration control are designed together.
- Rotor and chamber matched to product
- Replaceable rotor wear parts
- Vertical shaft and bearing assembly
- Integration into crushing and screening
Process Design Data
- 01
Feed
Feed size and upstream crushing stage.
- 02
Material
Hardness, abrasiveness, moisture and fines content.
- 03
Target Product
Required grading, fines content and particle shape expectation.
- 04
Rotor and Chamber
Rotor type, rotor speed, chamber arrangement and wear parts.
- 05
Drive and Integration
Motor and drive, vibration, maintenance access and screening circuit.
Rotor speed, power and capacity are defined by material tests and process calculation; no specific particle shape is guaranteed.
04Gallery
VSI Crusher Photo Gallery
05FAQ
VSI Crusher FAQ
How does a VSI crusher work?
Material is fed into the centre of a rotor spinning on a vertical shaft. The rotor accelerates and throws it; it breaks on impact with chamber surfaces or a material bed.
At which stage is a VSI used?
Usually after primary and secondary crushers, as the final stage in sand and fine aggregate production together with screening.
Is a cubical product guaranteed?
Particle shape depends on the material, rotor arrangement and operating conditions. Target shape and grading are assessed by sample tests; no general guarantee is given.
Which parts wear?
Rotor tips, rotor internal liners and chamber liners; wear rate depends on the abrasiveness of the material.
What information is needed for a quotation?
Material type, abrasiveness, moisture, feed size, target product grading and hourly capacity.
06Resources
Related Machines and Plants
Jaw CrusherPrimary crushing of coarse material between a fixed and a moving jaw.Secondary Impact CrusherSecond-stage impact crushing of pre-crushed material.Hammer CrusherImpact crushing of medium-hard materials with a rotor and hammers.Screening SystemsSeparating bulk material by particle size.
Related machine groups:Screening SystemsConveying SystemsSilos & Feeding SystemsDust Collection Systems
Technical Quotation
Request a technical quotation for a VSI crusher
Share your material, feed size and target grading, and we will define the VSI crusher and screening circuit together with you.
Information Needed for a Technical Quotation
- Material type and abrasiveness
- Moisture and fines content
- Feed size
- Target product grading
- Hourly capacity (t/h)
- Existing crushing and screening line