In cement mining and aggregate production, the final size of limestone directly affects grinding efficiency and concrete mix quality. The client has operated in Kazakhstan for many years. Their old crushing system had several problems:
To improve size control and production efficiency, the client required a new fine crushing system focused on processing 20–35mm limestone. The equipment needed to meet the following requirements:
After analyzing the material properties and target size, our technical team recommended:
Two PFL1250 vertical shaft impact crusher units operating in parallel.
Key specifications:
This machine uses a high-speed vertical rotor equipped with wear-resistant alloy hammers. Material enters the rotor area vertically. First, primary crushing occurs through hammer impacts. Then, high-speed impacts against the chamber’s impact plates generate secondary crushing.
Afterward, the material falls by gravity and passes through the rotor zone again, creating multiple impact and grinding cycles. A grate bar screen at the bottom controls the discharge. Qualified material passes through, while oversized particles remain in the chamber for further crushing.
This mechanism combines impact, hammering, and grinding to achieve high-frequency crushing within a short path, producing a uniform and controllable fine product. It is particularly suitable for medium-hard materials such as limestone, coal gangue, and gypsum.
The PFL series offers both movable and fixed hammer designs.
Clients can choose the configuration that best balances crushing performance and maintenance costs.
The bottom screen adopts an adjustable grate bar design. Operators can easily change the gap between the bars to control the final particle size. This allows the same machine to meet different production requirements without replacing the entire screen, greatly improving operational flexibility.
Key wear parts are manufactured from high wear-resistant alloy steel to ensure long service life. The modular structure provides easy maintenance access, allowing hammers and liners to be replaced quickly and minimizing downtime.
The project adopts two VSI crusher units operating in parallel to share the production load. If one unit requires maintenance, the other can continue operating, ensuring stable system performance and continuous production.
The PFL vertical shaft impactor is useful in many fields beyond limestone crushing.
Materials: River pebbles, granite, basalt.
Advantages: The adjustable output size (7–120 mesh) enables flexible production of different sand grades. The vsi stone crusher produces well-shaped particles and continuous grading, making it suitable for high-strength concrete batching plants.
Application: Pre-crushing before ball mill grinding.
Advantages: By reducing the feed size, the vsi crusher machine can increase ball mill output by 20%–30% while lowering the overall energy consumption of the grinding system.
Materials: Construction waste (concrete blocks), steel slag, tailings.
Advantages: With high wear-resistant alloy hammers and liners, the crusher can handle abrasive materials effectively. This supports recycling and green mining practices.
Materials: Coke, coal gangue, dolomite.
Advantages: The machine adopts a fully sealed structure to effectively control dust emissions and meet modern environmental protection standards.
With strong inventory management and assembly capacity, we delivered the equipment EXW within 15 days after receiving the deposit for this project. Each machine was fully test-run before shipment to ensure quick commissioning at the client’s site.
To support overseas installation, we provided complete technical documentation including foundation drawings, general assembly drawings, and maintenance manuals, all in standardized engineering formats.
Before equipment selection, our engineers analyze material characteristics, target particle size, and plant layout to recommend the most suitable configuration for each project.
We provide remote technical assistance, stable wear parts supply, and operational guidance for international clients, helping reduce downtime and ensure reliable long-term production.
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