Core Equipment for Aggregate Processing: Sand Making Machine Technical Analysis

As the central unit in modern mineral processing systems, sand making machines utilize high-pressure impact crushing mechanisms to transform raw rock materials (compressive strength ≤350MPa) into construction-grade sand compliant with GB/T 14684 standards. This equipment demonstrates exceptional performance in aggregate production, mine tailings processing, and concrete precast applications, efficiently processing common minerals including basalt, granite, and river pebbles (Mohs hardness ≤9).

Sand Making Equipment Technology Spectrum

Based on crushing mechanics and structural characteristics, mainstream sand making equipment falls into five technical categories:

1. Impact Crusher System

• Crushing Mechanism: Multi-stage impact fragmentation (kinetic energy conversion rate ≥82%)

• Applicable Conditions: Hard rock processing (compressive strength ≥200MPa)

• Technical Advantage: Three-stage crushing chamber achieves 3-5mm particle size control

2. Vertical Shaft Impact Crusher (VSI Type)

• Core Parameter: Linear velocity 60-85m/s (frequency-adjustable)

• Product Characteristics: Cubic particle ratio >92% (ASTM C125 standard)

• Typical Configuration: Hydraulic top cover system (maintenance time <2h)

3. Hammer Crusher Assembly

• Power System: Dual-rotor counter-impact (impact energy >220kJ)

• Suitable Materials: Medium-hard brittle minerals (moisture content <15%)

• Protection Design: Heavy-duty manganese steel liners (service life ≥8,000h)

4. Roller Press System

• Pressure Range: 50-300t inter-roller pressure (online adjustable)

• Energy Efficiency: Specific energy consumption <3.5kW·h/t

• Safety Feature: Hydraulic overload protection (response time <0.3s)

Equipment Failure Diagnosis Matrix

Based on 10,000+ operational hour data analysis, sand making system failures are categorized into three primary modes: