Limestone Double-Roll Crusher Sand Production Site

Project Highlights: To solve common industry issues like uneven particle size, high waste rates, and excessive impurities, a limestone sand processing plant in Tongling, Anhui adopted a Closed-Loop “Screening + Crushing + Recirculating Washing” Process. Powered by the HSM 800×600 D……

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Project Highlights: To solve common industry issues like uneven particle size, high waste rates, and excessive impurities, a limestone sand processing plant in Tongling, Anhui adopted a Closed-Loop “Screening + Crushing + Recirculating Washing” Process. Powered by the HSM 800×600 Double Roller Crusher for fine crushing, the plant achieves precise size reduction from feed ≤30 mm to output ≤3 mm, delivering continuous automated operation and clean, premium manufactured sand.

On-site Operation of a Double-Roll Crusher for Sand Production.

Closed-Loop “Screening + Crushing + Recirculating Washing” Process

Process Stage	Equipment & Workflow	Production Goal & Value
1. Feeding & Pre-Screening	Limestone raw feed (≤30 mm) enters the hopper and is conveyed evenly to a trommel screen for pre-sorting.	Accurate particle sizing prevents oversized rocks from clogging the crusher and maintains steady feeding.
2. Precision Crushing	Qualified feed passes into the HSM 800×600 Double Roller Crusher for fine crushing via pure static compression.	Low over-crushing rate; produces cubical particles and locks output strictly under 3 mm.
3. Closed-Loop Recirculation	Crushed material returns via a recirculating belt to the main conveyor for secondary screening in the trommel screen.	Creates a closed circuit that completely prevents oversized aggregate from contaminating finished sand.
4. Washing & Dewatering	Passing fine sand flows through a chute into a wheel sand washer to scrub impurities, followed by a dewatering screen.	Removes clay/dust silt and lowers moisture content, outputting clean, high-grade manufactured sand.

Core Advantages of the HSM 800×600 Double Roller Crusher

Precise Discharge Control & High Sand Yield: Features precise roller gap adjustment to lock output sizes strictly below 3 mm with ideal particle distribution, meeting strict high-grade concrete sand specifications.
Low Wear via Pure Compression: Unlike impact crushers that suffer rapid high-speed wear, compression crushing significantly extends roller shell lifespan and cuts daily operating costs.
Automated Integration for Continuous Processing: Seamlessly interfaces with closed-loop recirculation systems to handle continuous, full-load operation without manual intervention.

HSM Double-Roll Crusher

Site Summary: By pairing the HSM 800×600 Double Roller Crusher with an automated closed-loop washing system, the Anhui Tongling plant overcomes traditional sand-making challenges like high dust and poor particle shape, establishing a model for high-efficiency aggregate production!