Sandvik Prisec CI532 Horizontal Shaft Impactor

The Sandvik CI532 Prisec Horizontal Shaft Impactor (HSI) is a versatile secondary and tertiary crushing machine that combines high-reduction-ratio impact crushing with the flexibility to switch between a primary impactor configuration and a secondary/tertiary configuration by adjusting the rotor tip speed and apron settings — the defining characteristic of Sandvik's Prisec concept. The CI532 features a 1,400 mm × 1,100 mm feed opening, four rotor blow bars, and a 160 kW (215 hp) direct-drive motor, delivering throughputs of up to 440 tonnes per hour in secondary configuration. The Prisec blow-bar design uses reversible hammers that can be rotated 180° when the leading face wears, doubling the usable life of each blow bar and halving the consumption cost per tonne crushed compared to non-reversible designs.

The CI532 is particularly effective for producing highly cubical aggregate with excellent particle shape characteristics — an increasingly important specification requirement as Saudi concrete and asphalt standards have progressively adopted the European CEN aggregate standards that limit the proportion of flaky and elongated particles. The high rotor tip speed in tertiary mode generates impact energy sufficient to fracture stone preferentially along natural cleavage planes, producing a high proportion of cubical particles that improve concrete workability and asphalt compaction without requiring separate reshaping steps. Saudi ready-mix producers supplying high-specification structural concrete for NEOM towers, Red Sea Project hotels, and Riyadh Metro station structures specify 10% maximum flakiness index on their coarse aggregate, a target the CI532 achieves consistently in limestone, dolomite, and hard basalt applications.

The Prisec CI532 also operates effectively as a primary crusher for soft-to-medium-hardness materials including limestone, gypsum, and phosphate ore, where its open-circuit reduction ratio of 12:1 or more eliminates the need for a separate tertiary crushing stage in some circuit configurations. In Saudi Arabia, cement manufacturers including Saudi Cement Company and YACCO use horizontal shaft impactors for secondary limestone crushing in their raw material preparation circuits, where the HSI's ability to produce a well-graded minus-40 mm product from run-of-quarry limestone at high throughput rates makes it competitive with cone crushers on total cost of ownership when blow-bar wear rates are acceptable for the rock type. Maaden's industrial mineral operations similarly employ HSI crushers for secondary phosphate and bauxite size reduction.

Razz Middle East provides CI532 systems with application engineering support covering blow-bar alloy selection (standard manganese, high-chrome, or ceramic composite), apron setting optimisation, and circuit configuration advice to maximise CI532 performance on each Saudi customer's specific rock type and product specification. We stock replacement blow bars, breaker plates, and rotor wear protection components locally for fast exchange at scheduled maintenance intervals.