GNR Series Tertiary Crusher

The GNR series tertiary crusher is a third-stage impactor that turns secondary product into fine, cubical aggregate and manufactured sand (0–5 mm). With a small inlet and high rotor speed it reduces material to final size, delivering high-shape-quality fines for asphalt and concrete.

Technical data

Working principle

Fine crushing and shaping are done in a high-speed rotor by impact and rock-metal interaction. Maximum feed is limited to 150 mm. Stage: tertiary/quaternary.

Material and application

Suitable: manufactured sand and fine chippings from limestone and low-to-medium abrasive rock. Note: for high-silica material (granite/basalt/gravel) a VSI (vertical shaft) is more economical and more cubical than a tertiary impactor; abrasive sand wears impact parts fast. Wet clay feed clogs and must be washed first.

Reduction and wear (TCO)

Reduction is low-to-medium (mostly fine crushing/shaping); the target is 0–5 mm sand and specific fine fractions. High rotor speed can raise part consumption; abrasive material needs high-chrome/ceramic-MMC. Switching to a VSI on abrasive sand lowers cost per tonne. In TCO, sand quality, part life and downtime are decisive.

The tertiary crusher is part of the manufactured-sand → washing → dewatering chain; we supply the line with screw/bucket washers and fine-material screens from a single source.