News

Vertical Shaft Sand Makers: 7-Layer Rotor Hammers for Ultra-Fine Sand Production​

    In the construction and mining industries, the demand for high-fineness sand—with precise particle sizes and uniform shapes—has never been higher. Traditional machine often struggle to meet the strict standards required for high-performance concrete, precast products, and specialty ceramics. Our upgraded vertical shaft sand maker（Vertical Compound Crusher ）, featuring a 7-layer rotor hammer design, addresses this gap, delivering ultra-fine sand with unmatched consistency.​

The 7-Layer Rotor Advantage​

    The key innovation lies in the 7-layer rotor system, a significant upgrade from the standard 3-5 layer configurations. Each layer of hardened steel hammers works in sequence to break down material through multiple impact zones, ensuring thorough crushing and shaping. This multi-stage process achieves three critical improvements:​

    Finer Particle Sizes: The 7-layer design consistently produces sand with 80% of particles measuring 0.15-2mm, ideal for high-strength concrete that requires tight packing density. In testing, it outperformed a 5-layer model by reducing oversize particles (above 2mm) from 12% to just 3%.​

    Uniform Shape: The sequential impact forces create cubical particles with minimal flakiness. For precast concrete producers, this means better workability and reduced water demand, lowering mix costs by 5-8%.​

    Higher Yield: By maximizing the use of impact energy across 7 layers, the machine converts 92% of feed material into usable sand, compared to 85% with conventional models. This reduces waste and boosts production efficiency.​

Real-World Performance​

    A concrete pipe manufacturer in Malaysia upgraded to our Sand Making Machine to meet stricter industry standards. The plant processes granite into sand for reinforced concrete pipes, which require precise particle gradation to withstand underground pressure. After installation:​

    The sand’s fineness modulus (FM) stabilized at 2.6, within the optimal 2.3-3.1 range for structural concrete.​

    Pipe compressive strength increased by 15%, allowing the manufacturer to bid on high-pressure sewer projects.​

    Daily sand production rose by 18% despite using the same motor power, thanks to improved energy transfer in the multi-layer system.​

    In a ceramic tile factory in Vietnam, the machine produces ultra-fine sand (0.15-0.6mm) for glaze preparation. The consistent particle size reduced glaze defects by 22%, as uneven particles no longer caused streaking or bubble formation.​

Design Features for Durability​

    To handle the increased wear from 7-layer operation, the rotor hammers are made from high-chrome alloy, extending their lifespan to 800 hours—30% longer than standard hammers. The machine also includes:​

    Adjustable Impact Gaps: Operators can fine-tune each layer’s clearance to adapt to different materials, from soft limestone to hard basalt.​

    Dust Suppression: An integrated water spray system captures 95% of dust, meeting EU and US environmental standards for urban operations.​

    Quick Maintenance: A hydraulic rotor lifting system reduces hammer replacement time from 4 hours to 90 minutes, minimizing downtime.​

Future-Proofing Sand Production​

    As infrastructure projects demand higher-quality materials—from high-rise concrete to green building products—the 7-layer vertical shaft sand maker positions producers to compete. Its ability to deliver ultra-fine, consistent sand ensures compliance with evolving standards while improving end-product performance.​

    For operations seeking to upgrade their sand production, this machine offers a clear advantage: better quality, higher yield, and lower long-term costs. Contact us to test its performance with your specific feed material.