Raj Stones, based in Fujairah in the United Arab Emirates, is said to have seen its aggregates production increase through the use of a 2403 Sandvik Construction CH660 cone crusher. Guy Woodford reports
As an operator of one of the larger quarries in the UAE, Raj Stones has used a wealth of Sandvik technology to help reinforce its position as one of the premier aggregate suppliers in the region, now exporting material to Qatar, as well supplying the growing Emirates construction industry.
At the heart of the Raj Stones business is its Raj Stones LLC and Raj Rocks LLC quarries. With total estimated mineral deposits being in the region of 265 million tonnes, both quarries possess multi-stage, state-of-the-art crushing lines. Together, the quarries are capable of producing 1,000tonnes per hour of crushed aggregates and sands, which is used by the local construction industry, and now, increasingly, for export.
In order to deal with increasing market requirements for high quality aggregate, a key piece of equipment used by the Raj Stones quarry is the Sandvik CH660. The Sandvik cone crushers are of advanced design, possessing a high capacity in relation to size, high reduction efficiency and producing excellent product shape. With hydraulically adjusted CSS, optional automation, a choice of several different crushing chambers, and many other high performance features, each model is versatile, user friendly and highly productive.
The use of the Sandvik CH660 cone crusher came about as Raj Stones identified a need to modernise their production capabilities, requiring an efficient cone crusher that was capable of producing aggregate to their exacting specifications at a throughput of between 450-500tonnes/hour. The new cone crusher would replace their existing Sandvik supplied H6800. Following a thorough search of all the premier crusher brands on the market, Raj Stones decided to replace the H6800 with its cutting-edge replacement – the Sandvik CH660.
The CH660 is said to have proved to be ideal for Raj Stones' secondary requirements because of the new design of the intake flow; this compact and easy to service design makes it the perfect choice for Raj Stones' quarrying operation. Such features as its automatic overload protection, and Sandvik’s revolutionary automatic setting system, ASRi, have also played a key part in maximising production. The latter system optimises cone crusher efficiency by automatically adapting the crusher to variations in feed conditions, and by continuously measuring and compensating for crusher liner wear the ASRi allows the user to fully utilise crusher liners, thereby scheduling liner replacements in order to coincide with planned maintenance. The ASRi also assists in keeping the crusher choke fed, thus maximising rock-on-rock crushing, which helps to optimise the quality of the final product.
Raj Stones' hydraulically adjusted CH660 is characterised, 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 optimise operations at all levels, with these improvements covering the entire crusher, including the feed hopper, top shell, bottom shell and main shaft/head centre.
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. Furthermore, 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.
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. 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 greater 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 said to have 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. 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 tonne 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.
As an operator of one of the larger quarries in the UAE, Raj Stones has used a wealth of Sandvik technology to help reinforce its position as one of the premier aggregate suppliers in the region, now exporting material to Qatar, as well supplying the growing Emirates construction industry.
At the heart of the Raj Stones business is its Raj Stones LLC and Raj Rocks LLC quarries. With total estimated mineral deposits being in the region of 265 million tonnes, both quarries possess multi-stage, state-of-the-art crushing lines. Together, the quarries are capable of producing 1,000tonnes per hour of crushed aggregates and sands, which is used by the local construction industry, and now, increasingly, for export.
In order to deal with increasing market requirements for high quality aggregate, a key piece of equipment used by the Raj Stones quarry is the Sandvik CH660. The Sandvik cone crushers are of advanced design, possessing a high capacity in relation to size, high reduction efficiency and producing excellent product shape. With hydraulically adjusted CSS, optional automation, a choice of several different crushing chambers, and many other high performance features, each model is versatile, user friendly and highly productive.
The use of the Sandvik CH660 cone crusher came about as Raj Stones identified a need to modernise their production capabilities, requiring an efficient cone crusher that was capable of producing aggregate to their exacting specifications at a throughput of between 450-500tonnes/hour. The new cone crusher would replace their existing Sandvik supplied H6800. Following a thorough search of all the premier crusher brands on the market, Raj Stones decided to replace the H6800 with its cutting-edge replacement – the Sandvik CH660.
The CH660 is said to have proved to be ideal for Raj Stones' secondary requirements because of the new design of the intake flow; this compact and easy to service design makes it the perfect choice for Raj Stones' quarrying operation. Such features as its automatic overload protection, and Sandvik’s revolutionary automatic setting system, ASRi, have also played a key part in maximising production. The latter system optimises cone crusher efficiency by automatically adapting the crusher to variations in feed conditions, and by continuously measuring and compensating for crusher liner wear the ASRi allows the user to fully utilise crusher liners, thereby scheduling liner replacements in order to coincide with planned maintenance. The ASRi also assists in keeping the crusher choke fed, thus maximising rock-on-rock crushing, which helps to optimise the quality of the final product.
Raj Stones' hydraulically adjusted CH660 is characterised, 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 optimise operations at all levels, with these improvements covering the entire crusher, including the feed hopper, top shell, bottom shell and main shaft/head centre.
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. Furthermore, 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.
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. 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 greater 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 said to have 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. 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 tonne 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.
