The double roller sand making machine combines structural simplicity with low-maintenance requirements, engineered to deliver enhanced crushing capacity for hard materials (≤250MPa compressive strength, ≤10% moisture). It excels in fine crushing applications for river pebbles, coke, coal, ceramic raw materials, quartz, limestone, industrial slags, and similar solids across mineral processing, power generation, cement, and construction industries. Particularly in producing construction aggregates (e.g., 5-10mm coarse sand) and coal/gangue processing, it outperforms conventional high-pressure grinding rolls (HPGRs) by 30% efficiency while enabling uniform particle shaping for steel grit manufacturing.
Operating via two counter-rotating rollers, brittle materials enter through a load cell-equipped weighing hopper, are compressed into dense cakes in the roll nip, and discharged for downstream processing. Key innovations include:
A hydraulic system enabling precise roll gap adjustment (0.5-30mm) with overload protection;
Extended service life (≥20,000 hours) through dual roller solutions: carbide-studded alloy steel or Mn13Cr2 segmented cast steel surfaces;
Proven 40% operational cost reduction in cobblestone processing using manganese steel rollers.
Validated in Vietnam cement plants (220TPH limestone/clay output) and German steel grit facilities (90% cubic particles), it withstands ISO 4700/ASTM D2216 standards for extreme material conditions.
