Crushing the Production Bottleneck

Aggregates Processing

Crushing the Production Bottleneck

Cone Crusher brings Production boost to Raj Stones in the United Arab Emirates
In order to deal with increasing market requirements for high quality aggregate, a key piece of equipment used by the Raj Stone quarry in the United Arab Emirates is a modern cone crusher possessing a high capacity in relation to size, high reduction efficiency and produce excellent product shape.
(ed. WoMaMarcel - 03/9/2015)
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Benefits of the new Crusher

Raj Stones hydraulically adjusted CH660 crusher is characterized, as are all Sandvik cone crushers, by robust design and high performance. A combination of Constant Liner Performance (CLP) crushing chambers and high motor power, gives the crushers very high capacity. However, the Sandvik CH660 design as used by Raj Stones has undergone an extensive upgrade designed to optimize operations at all levels, with these enhancements covering the entire crusher, including the feed hopper, top shell, bottom shell and main shaft/ head center.

The top shell has been reinforced to meet the greater demands from quarrying and mining customers. Developed using the latest software, the brand new design of the CH660 offers smoother curved corners to decrease stresses. In addition, the spider cap diameter has been increased to protect the spider hub. The feed hopper is bolted with lock nuts, and possesses a reinforced four piece design producing increased stability. The bottom shell has a five arm instead of a three arm design, providing the eccentric hub with stronger support ensuring overall sturdiness.


The CH660 cone crusher from Sandvik constrction is at the center of the Raj Rocks LLC aggregate processing plant.

Improved throughput and productivity are delivered through an increased breathing tube which allows the free flow of air in and out of the spider bearing, thereby preventing clogging to take place. The spider arms are lifted up creating more room for the material to flow into the chamber, with an optional level indicator also being available for enhanced control of the level in the feed hopper. This radar sensor in K-band technology performs continuous high precision level measurements making it possible to adjust the material level within small variations. Additionally reduced vibration and noise pollution result due to the CH660 being equipped with Sandvik lightweight polymer linings for wear protection and noise reduction, producing a better working environment and longer wear life, as the linings are easy to install and to change. Several standard crushing chambers are also available for each model meaning the crushers may be easily matched to changes in production through selecting the right crushing chamber and eccentric throw.

A vital factor that played an important role in Raj Stones deciding which cone crusher to buy when upgrading their cone crusher was the quality, and availability of spare parts, together with the aftermarket support available. Hence Raj Stones had been impressed with the support they had previously received from Sandvik for their H6800, and since starting to use the CH660 they were keen to develop the relationship through the use of Sandvik wear and spare parts, signing service and supply agreements for the whole of 2013. This continued partnership between the two companies ensures the highest levels of productivity and lowest possible cost per ton production.

The Raj Stone Quarry now supplies aggregates for a diverse array of uses by the construction industry throughout the UAE, and other Gulf states. Thus, from their state of the art site the company is able service its customer base of road builders, developers, asphalt plants and ready mix plants. Through the use of such equipment as a Sandvik CH660 cone crusher, the Raj Stone quarry services the multifaceted needs of the aggregates industry, operating some of the cleanest and most modern plants in the country, aided through the use of some of most advanced equipment on the market.

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