Leshan, Sichuan Limestone Deep Processing & Sand-Making Line Case Study

Project Overview: To address traditional limestone processing issues—such as handling oversize feed boulders, poor single-stage equipment balance, high stone powder generation, and poor gradation—a client in Leshan, Sichuan adopted Huashengming’s (HSM) multi-stage combination crushing sy……

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Project Overview: To address traditional limestone processing issues—such as handling oversize feed boulders, poor single-stage equipment balance, high stone powder generation, and poor gradation—a client in Leshan, Sichuan adopted Huashengming’s (HSM) multi-stage combination crushing system. The plant pairs a 900×1200 toothed roll primary crusher with a 1212 double roll secondary sand-making crusher to ensure high output and superior aggregate quality.

On-site photo of the 900×1200 HSM Toothed Roll Crusher processing large raw limestone rocks during primary crushing

⚙️ Dual-Stage Equipment Process Configuration

Process Stage	Equipment Model	Operating Mechanism & Performance Output
Primary Crushing (Coarse Stage)	900×1200 Limestone Toothed Roll Crusher	Utilizes shear and splitting mechanics to crush large limestone boulders down below 3 cm. Prevents jamming, guarantees uniform sizing, and stabilizes line capacity.
Secondary Crushing (Fine Sand Stage)	1212 Limestone Double Roll Crusher	Receives pre-treated <3 cm material via conveyors. Uses interparticle compression to produce well-rounded sand with controllable particle sizing and minimal dust.

On-site View of Crushed Limestone

Core Operational Advantages

Clear Division of Labor & High Throughput: Primary toothed roll crushing maximizes early size reduction, while fine double roll crushing preserves product quality. This division prevents production bottlenecks and machine stoppages.
Superior Aggregate Gradation: Pre-shaping material before fine sand-making ensures cubical granules, uniform gradation, and low stone powder content, increasing commercial product value.
Low Failure Rates & Reduced Maintenance: Staging the reduction workload prevents excessive mechanical stress on individual units, extending wear part life and lowering upkeep costs.
Tailored Material Compatibility: Standardized, material-specific machine sizing ensures long-term operational stability for large-scale limestone quarrying operations.

Client Feedback (Leshan Site): “Single crusher setups previously caused frequent blockages with oversized boulders and unstable output. The new combination process pre-crushes material below 3 cm before fine sand-making. The plant now runs smoothly, yields superior particle appearance, and achieves significantly higher overall output.”