Guide to Closed Circuit Crushing with Screen

For aggregate and mining operations in Saudi Arabia and the UAE, closed circuit crushing is a proven method to improve product consistency, reduce recirculating loads, and lower wear costs. A closed circuit consists of a crusher (jaw, cone, or impact) combined with a vibrating screen that returns oversize material back to the crusher. This guide to closed circuit crushing with screen explains the benefits, how to set it up, and common configurations for hard rock like gabbro and limestone. OCP Mechanical Company supplies complete closed‑circuit plants with factory‑direct pricing and 24/7 support.

Why Use Closed Circuit Crushing?

The primary advantage of closed circuit crushing is producing a precisely sized product with fewer fines and less oversize. When material passes through the crusher once and then over a screen, only particles that are already smaller than the screen opening become final product. Oversize returns to the crusher for another pass. This ensures that 95‑100% of the final product is within the target size range – essential for concrete aggregates and road base specifications.

Additional benefits of following this guide to closed circuit crushing with screen include:

• Lower energy consumption per ton – The crusher only works on oversize material, not on already‑sized particles.

• Extended liner life – Eliminates over‑crushing of fines, reducing wear.

• Consistent gradation – Automatically compensates for feed variations and liner wear.

Note: Product data are constantly updated; for the latest specifications of closed‑circuit plants, please contact our online customer service.

Many quarries in Riyadh and Dubai have switched from open to closed circuit, reporting a 10‑20% increase in plant throughput and a 15‑25% reduction in liner consumption.

Typical Closed Circuit Configurations

A successful guide to closed circuit crushing with screen must match the circuit to the application:

• Jaw crusher + screen – Rare, because jaw crushers produce a wide size range. Only used for scalping.

• Cone crusher + screen – Most common for secondary and tertiary hard rock crushing. Feed is 30‑100 mm; screen aperture set to 20‑40 mm; oversize returns to cone.

• Impact crusher + screen – Used for limestone or softer rock. High reduction ratio allows single pass, but closed circuit improves product shape.

• VSI + screen – Essential for manufactured sand. VSI breaks rock; screen with 5‑10 mm apertures returns oversize; produces cubical 0‑5 mm sand.

For a 200‑300 tph gabbro line in the UAE, a cone crusher (Type C) with a double‑deck screen (top deck 40 mm, bottom deck 20 mm) is a widely used configuration.

The above values are for illustration only. OCP continuously improves its products. Contact our online team for the most current data sheet.

How to Set Up and Optimize a Closed Circuit

Follow these steps from our guide to closed circuit crushing with screen for optimal performance:

1. Size the screen correctly – Screen capacity should be 1.5‑2.0 times the crusher capacity to handle recirculating load. For a 200 tph crusher, use a screen capable of 300‑400 tph.

2. Set screen aperture – Typically 1.2 to 1.5 times the desired product top size. For 20 mm aggregate, use 25‑30 mm apertures.

3. Monitor recirculating load – A load of 150‑250% is acceptable. Higher indicates screen inefficiency or crusher setting too fine.

4. Use crusher automation – Closed‑loop control between screen feed and crusher speed maintains steady recirculation.

OCP’s closed‑circuit plants include belt scales and PLC controls to automatically adjust crusher CSS or feeder speed based on recirculating load.

Why OCP Is Your Partner for Closed Circuit Crushing

Following this guide to closed circuit crushing with screen ensures you get the most from your plant. OCP Mechanical Company has over 40 years of history in designing and supplying closed‑circuit systems. We offer:

• Free pre‑sale circuit simulation to confirm screen and crusher sizing.

• Factory‑direct components (crushers, screens, conveyors) integrated into a single package.

• 24/7 online technical support for tuning and troubleshooting.

For a no‑obligation consultation and a customized guide to closed circuit crushing with screen for your material, simply click the live chat icon on this page. Our online customer service team is available 24 hours a day, 7 days a week, to answer your technical questions, provide free recommendations, and help you design a high‑efficiency crushing circuit.