VSI Sand Maker | XingQing Machinery

Product Overview

The VSI (Vertical Shaft Impact) Sand Maker is a versatile crushing machine specifically engineered for artificial sand production and aggregate shaping. It features a unique deep-cavity rotor design and multi-stage crushing chamber for high reduction ratios and excellent product shape. With a capacity range of 50-650 t/h, the VSI Sand Maker handles various feed materials including limestone, granite, basalt, river pebble, and ore. The machine supports both rock-on-rock and rock-on-iron crushing modes, selectable based on material hardness and application requirements. Its compact structure, high crushing efficiency, and superior product quality make it an essential machine in modern aggregate processing lines.

Working Principle

Material Feed and Distribution

Materials enter the machine through the feed hopper and are guided to the center of the high-speed rotor via the feed tube. The feed rate is controlled by an upstream vibrating feeder or belt feeder, ensuring uniform material distribution into the rotor and preventing uneven wear or rotor imbalance.

Rotor Acceleration

The electric motor drives the main shaft and rotor assembly at high speed through V-belts. Materials in the rotor are accelerated outward by centrifugal force, reaching linear speeds of 50-70 m/s at the rotor tip. The rotor features a patented deep-cavity design for maximum material acceleration and throughput.

Impact Crushing and Shaping

High-speed materials ejected from the rotor impact the material curtain (rock-on-rock mode) surrounding the crushing chamber, or the anvil ring (rock-on-iron mode). The impact force breaks materials along natural fracture lines. Materials then cascade and further collide in the vortex chamber for optimized cubical particle shaping before discharge.

Crushing Process

Feed Hopper → Rotor Acceleration (50-70 m/s) → Impact Crushing (Rock-on-Rock / Rock-on-Iron) → Vortex Chamber Attrition → Final Discharge

Technical Parameters

Model	Rotor Dia. (mm)	Max Feed Size (mm)	Capacity (t/h)	Power (kW)	Rotor Speed (rpm)	Weight (t)	Overall Size (L×W×H mm)
VSI-650	650	35	50-100	37-55	1600-2100	5.8	3400×2100×2700
VSI-760	760	40	80-160	55-90	1400-1900	7.5	3700×2300×2900
VSI-850	850	45	120-240	90-132	1300-1750	9.8	4100×2500×3100
VSI-950	950	50	180-360	132-200	1200-1650	12.5	4600×2800×3500
VSI-1050	1050	55	280-480	200-280	1100-1550	16.0	5000×3000×3800
VSI-1150	1150	60	400-650	280-400	1000-1450	20.0	5400×3300×4100

※ Capacity varies with material type, feed size gradation, and moisture content. Power reference is for limestone feed; harder materials require higher power. Technical data subject to change without prior notice.

Key Components

Component	Material / Spec	Function
Rotor Assembly	High-strength alloy steel (40Cr / 42CrMo), dynamically balanced G6.3	Accelerates feed materials outward through centrifugal force, generates impact velocity for crushing
Crushing Chamber Lining	High-chromium alloy (Cr26/Cr30) or HMX composite wear plates	Forms the impact zone around the rotor, withstands high-energy material impacts
Feed Mechanism	Q235 hopper + wear-resistant steel center feed tube	Guides material flow into rotor center, prevents spillage and uneven distribution
Anvil Ring Set	High-chromium cast iron, segmented design for easy replacement	Fixed impact targets for rock-on-iron crushing mode, breaks hard materials efficiently
Material Curtain Shelf	Wear-resistant steel shelf with replaceable wear plates	Holds material bed for rock-on-rock impact mode, reduces wear cost for abrasive materials
Main Shaft and Bearings	40CrNiMo forged shaft, double-row spherical roller bearings (SKF/FAG)	Transmits motor power to rotor, supports high-speed rotation and heavy radial/axial loads
Lubrication Station	Dual gear pump, oil-air cooler, double filter (20μm + 10μm)	Continuous circulating oil supply, bearing cooling, debris filtration for extended bearing life
Machine Base	Q235 welded H-beam frame with vibration damping pads	Supports crusher weight, absorbs operational vibration, ensures stable foundation

Product Features

High Crushing Efficiency

Patented deep-cavity rotor design maximizes material acceleration and impact energy utilization. Higher throughput per unit power compared to conventional VSI crushers, reducing overall operating cost.

Superior Particle Shape

Multi-stage impact and inter-particle attrition produces cubical product with needle-like flake content below 10%. Ideal for high-performance concrete aggregates and asphalt pavement materials.

Wear-Resistant Structure

Alloy steel rotor with HMX wear protection, high-chromium anvil rings (Cr26/Cr30), and ceramic composite chamber lining provide extended service life in abrasive material crushing.

Flexible Operation Modes

Supports both rock-on-rock (ROR) and rock-on-iron (ROI) crushing modes. Quick chamber conversion for different materials and applications. Adjustable rotor speed for product fineness control.

Easy Maintenance Access

Hydraulic cover opening mechanism provides quick access to rotor and crushing chamber. Wear parts designed for fast replacement. Top or side maintenance access depending on model.

Versatile Applications

Single machine handles sand making, aggregate shaping, and fine crushing. Suitable for limestone, granite, basalt, river pebble, diabase, andesite, quartzite, iron ore, and construction waste.

Application Fields

Artificial Sand Production

Manufactured sand (M-sand) production from various raw materials. Output fineness modulus adjustable from 2.5-3.5. Meets national construction sand standards (GB/T14684) for concrete and mortar applications.

Highway Construction

Aggregate shaping for highway base course, surface layer, and asphalt concrete. Excellent particle shape and gradation improves pavement compaction, stability, and durability under heavy traffic loads.

Commercial Concrete

Fine and coarse aggregate preparation for commercial concrete batching plants. Consistent product quality ensures stable concrete workability and strength. Suitable for C30 to C80 concrete grades.

Mining Industry

Tertiary and quaternary crushing in mineral processing. Processes iron ore, copper ore, gold ore, and non-metallic minerals. High reduction ratio reduces energy consumption in downstream grinding stages.

Manufactured SandAggregate ShapingConcrete AggregateHydroelectric PowerMine BeneficiationConstruction Waste

Selection Advice

Material hardness determines crushing mode: For limestone, dolomite (Mohs ≤5), rock-on-iron mode offers higher crushing efficiency. For granite, basalt, quartzite (Mohs 5-8), rock-on-rock mode reduces wear cost and is recommended for sand making.
Feed moisture control: Feed moisture should be controlled below 5% to prevent material buildup in the rotor and chamber. For high-moisture materials, consider pre-drying or closed-circuit operation with a dewatering screen.
Rotor speed and product requirement: For coarse sand (fineness modulus 3.0-3.5), use lower rotor speed for larger output. For fine sand (FM 2.5-3.0), use higher speed. Adjustable rotor speed allows fine-tuning based on market demand.
Closed-circuit configuration: For maximum sand yield, configure with vibrating screen to return oversized material. Typical circulating load of 30-50% balances crushing efficiency and finished product quality.
Feed size and gradation: Keep feed size within each model's maximum specification. A well-graded feed with appropriate fines content improves particle interlocking in the rotor, enhancing crushing efficiency by 15-25%.
Protection equipment: Install permanent magnetic separator and metal detector before the VSI to prevent tramp iron damage. Consider an air screen or sand washing system to control fines content (≤10%) in finished sand.

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