The CSI-1212 Secondary Impact Crusher serves the second crushing stage in an aggregate plant. The following details cover feed materials, output products, applications, wear-part service and comparisons with alternative crushers, for buyers matching the machine to a specific operation.
What materials can the CSI-1212 process?
The CSI-1212 is built for medium-hard, low to moderately abrasive stone already reduced by a primary crusher. Typical feed includes:
- Limestone, dolomite and similar sedimentary rock
- River gravel and natural stone
- Recycled concrete, demolition rubble and reclaimed asphalt
Maximum feed size is 250 mm. Highly abrasive feed such as granite or quartz-rich rock can be run but increases blow-bar wear and is generally better suited to a tertiary or vertical shaft impactor in the final stage.
What products does it make?
The CSI-1212 produces well-graded, predominantly cubical aggregate ready for screening into standard sizes. Common products are base and sub-base aggregate, concrete aggregate and asphalt aggregate. The impact crushing principle delivers a cubical grain shape that improves the strength and workability of bound mixes.
Which industries use this crusher?
- Quarries and aggregate producers making graded stone
- Ready-mix concrete and precast plants
- Asphalt and road construction
- Construction and demolition recycling operations
How are wear parts replaced and how long do they last?
The principal wear parts are the blow bars (breaker bars) on the rotor and the breaker plate liners. Both are high-chrome or manganese alloy and are interchangeable. Service life depends on feed abrasiveness and tonnage; more abrasive material shortens the interval. Replacement is quick because two hydraulic cylinders open the housing for rotor access and the rear doors expose the breaker plate liner bolts, minimising downtime.
How does the CSI-1212 compare with a cone crusher?
A cone crusher works by compression and is favoured for hard, abrasive rock, but it gives a lower reduction ratio per stage and a higher share of flaky particles. The CSI-1212, crushing by impact, achieves a higher reduction ratio and a more cubical product in one pass, which is preferred for limestone aggregate and recycling. For very hard, abrasive feed a cone may offer lower wear cost, so the selection follows the rock type. A secondary impact crusher generally has a lower purchase price and simpler maintenance than a cone of similar capacity, which is a factor when assessing total cost of ownership.
How does the CSI-1212 relate to the CSI-1210 and CSI-1215?
The CSI-1212 is the mid-range unit, with a 1,100 x 1,250 mm rotor, 250 mm feed limit and 120-150 t/h capacity. The CSI-1210 is smaller (200 mm feed, 60-100 t/h) for compact plants, while the CSI-1215 has a wider rotor for larger feed and 200-250 t/h. All three share the same crushing principle, hydraulic adjustment and maintenance design, so selection is driven by the required throughput and the largest feed size the secondary stage must accept.
What support is available for the CSI-1212?
The CSI-1212 is supplied within complete CONSTMACH crushing and screening plants and can also be added to an existing line. Wear and spare parts, including blow bars and breaker plate liners, are available from the manufacturer, and the modular construction keeps transport and installation straightforward.
