Roller Sand Making Machine

Application areas：The Roller Sand Making Machine is not only suitable for manufactured sand production in sand and gravel plants, quarries, and aggregate production lines serving highway, railway, and hydropower construction, but also widely used in fixed processing facili

Applicable materials：Granite, basalt, limestone, river pebbles, quartz, diabase, iron ore, copper ore tailings, construction waste concrete, sandstone, and other hard to medium-hard materials suitable for manufactured sand production (compressive strength ≤300 MPa, feed size

Key Advantages

Superior Sand Quality Matching Natural River Sand

The inter-particle compressive grinding mechanism produces sand particles with a naturally rounded, cubical shape and smooth surface texture closely matching the morphology of natural river sand — superior to the angular, flaky particles produced by impact-type VSI crushers. The resulting manufactured sand achieves higher concrete workability, reduced water demand, and better concrete strength development compared to angular crushed sand, meeting the most demanding concrete mix design specifications for high-grade highway, bridge, and high-rise building construction.

Precise Gradation Control Across All Standard Zones

The individually adjustable roll gap on each crushing stage, combined with the integrated classifier and fines return circuit, allows the output sand gradation curve to be fine-tuned to meet Zone I (coarse), Zone II (medium), or Zone III (fine) gradation specifications as defined by national construction aggregate standards. This gradation control capability eliminates the need for separate screening and blending operations to correct off-spec sand gradation, reducing plant complexity and operating cost.

Low Dust & Low Noise, Environmentally Compliant Operation

The enclosed roll-gap crushing mechanism generates significantly less airborne dust than open-rotor VSI impact crushers, and the compressive grinding action produces far lower operating noise levels than high-velocity impact crushing. The machine is supplied with an integrated dust enclosure and negative-pressure dust extraction connection point as standard, enabling direct connection to the plant dust collection system to maintain dust emissions well within environmental permit limits without additional enclosure structures.

High Wear Part Service Life, Low Cost Per Tonne

Roll surfaces are fabricated from high-chromium alloy cast iron (HRC 58–62) or tungsten carbide composite hard-face welding, achieving roll surface service lives of 800–2,000 operating hours depending on feed material abrasiveness — significantly longer than the rotor tips and anvil rings of equivalent VSI impact sand makers. Roll surface segments are individually replaceable on the shaft without dismounting the roll body, and the symmetrical roll surface design allows rolls to be reversed for double the wear life before replacement.

Stable Output Quality Under Varying Feed Conditions

The hydraulic roll gap control system on the floating roll of each stage automatically compensates for variations in feed rate, feed size distribution, and material hardness by adjusting the roll gap in real time to maintain a consistent crushing force and output gradation. This closed-loop gap control eliminates the output quality fluctuations that affect open-circuit VSI impact crushers when feed conditions change, ensuring consistent sand quality throughout the full production shift without manual adjustment.

Compact Multi-Stage Layout, Minimal Civil Work

The vertical multi-stage roll arrangement stacks multiple crushing stages within a compact footprint significantly smaller than an equivalent VSI crusher plus classifier circuit, reducing civil foundation requirements, structural steel tonnage, and plant building volume. The modular roll cassette design allows individual roll stages to be added or removed to adjust total installed capacity as production requirements change, protecting the initial capital investment and enabling phased capacity expansion.

Crushed aggregate feed material (typically 5–60 mm) is delivered to the top of the Roller Sand Making Machine by a belt conveyor and enters the first crushing stage, where a pair of counter-rotating high-pressure grinding rolls draw the material into the roll gap through friction and the nip angle geometry, subjecting it to intense inter-particle compressive and shearing forces that progressively fracture and grind the material into finer particles; the partially reduced material discharged from the first roll pair falls by gravity into the second roll pair operating at a narrower gap setting for further size reduction, and this multi-stage progressive reduction continues through all roll pairs until the material reaches the target sand gradation of 0–5 mm; the product sand discharged from the final roll stage passes through an integrated classifier that separates the correctly sized sand fraction from any residual oversized particles, which are automatically recirculated to the feed inlet for re-processing; the hydraulic tensioning system on the floating roll of each stage continuously maintains the set crushing pressure and automatically retracts to pass any uncrushable tramp material without damaging the rolls; finished sand meeting the target gradation specification discharges from the classifier underflow onto the product conveyor for stockpiling or direct transfer to the downstream concrete batching or dry mortar production system.

Technical Parameters

Model	Roller diameter (mm)	Roller surface width (mm)	Feed size (mm)	Motor power (kw)	Capacity (tph)
YDG-1080	1000	800	≤30	2*37	50-80
YDG-1210	1200	1000	≤30	2*75	100-120
YDG-1212	1200	1200	≤30	2*90	120-150
YDG-1510	1500	1000	≤30	2*132	140-170
YDG-1810	1800	1000	≤40	2*220	160-230
YDG-2012	2000	1200	≤40	2*315	250-300