Guangdong-based Long Ying Construction Engineering Ltd has become the first customer in China to purchase Sandvik Mobile Crushers and Screens’ revolutionary QI442 HS. This advanced HSI (Horizontal Shaft Impact) crusher is able to provide highly accurate material reduction at high rates of throughput. Additionally, through the use of Sandvik’s advanced modular hanging screen, the crusher is also able to produce up to three products where and when required.
Long Ying serves the needs of the local construction industry. To offer a modern, productive and environment-friendly solution, the company recently turned to a Chinese equipment dealer, POTA Environmental Technology (Guangdong) Co Ltd - the authorised distributor of Sandvik Mobile Crushers and Screens.
POTA recommended the Sandvik QI442 HS, one of its latest developments. This requirement was based on crushing and screening mainly rocks, bricks, concrete and other materials arising from demolition and excavation projects that Long Ying undertakes. The combination of impact crusher with double-deck hanging screen was seen as the ideal solution in order to produce aggregates for road construction as well as concrete and asphalt plants.
The QI442 HS supplied to Long Ying comes equipped with a range of customer-focused features. A pre-screen is fitted to ensure maximum scalping capability and to prevent any undersize material passing through the impactor, maximising throughput and reducing wear costs. This also allows a specific sized product to be produced from the natural fines conveyor.
The pre-screen also has a choice of grizzly or punch plate top deck and mesh bottom, providing the flexibility to suit any application whilst an under pan feeder located beneath the impactor protects the main conveyor belt from the material exiting the impact crusher. The newly developed CI621 Prisec Impactor includes a new rotor locking and positioning device for controlled rotor movement during maintenance, which enhances safety and meets legislation requirements.
With a host of innovations for improved efficiency and greater safety during maintenance, the QI442 HS is able to operate in either primary or secondary crushing modes. Moreover, the two hydraulically assisted curtains can be readily adjusted to produce a wide range of high quality product sizes.
Double-deck modular hanging screen
One of the benefits incorporated into the QI442 HS is the optional double-deck modular hanging screen system. It is interchangeable and offers the flexibility for the crusher to operate in open or closed circuit. The innovative design enables set-up in less than 30 minutes and can be fitted without the use of additional lifting equipment.
The hanging screen option delivers multi-functionality as a 1-, 2- or 3-way split screener, as well as a highly productive and efficient impact crusher. The double-deck hanging screen enables the machine to produce two screened products and recirculate the oversize back into the feed conveyor.
The oversize conveyor may be hydraulically rotated for material stockpiling (90°) of up to three products on the floor, or removal (180°). The tail section can be raised hydraulically to give improved ground clearance for transport when loading or unloading.
The QI442 HS also comes with Sandvik My Fleet remote monitoring system as standard. This facilitates accurate production forecasting, ensuring that the most efficient use is obtained from equipment, thereby maximising return on investment.
Long Ying is now using the Sandvik QI442 HS to crush mainly construction and demolition waste with a maximum feed size of 800 mm, producing two core products: 0-10 mm and 10-40 mm, at an average production rate of 200 tph.
Mr Zhang, operations manager at Long Ying said, “Our company would like to expand our business. We’d like to cooperate with Sandvik to have a national wide, full product lifecycle, comprehensive solutions in different applications support. We received excellent service from POTA from the very beginning: from the delivery of the machine, to commissioning and training of service and wear parts replacement, the POTA field engineer gave their full support until the machine was fully operational. We really appreciate the service.”
He added, “Sandvik equipment is world class quality, very stable, and we have experienced no downtime due to any failures. The machine is highly productive with a good shape end product and low fuel consumption of 1.2 rmb/ton. The hanging screen solution means that only one machine is now required to do the job. In future projects, if we need more machines, definitely we will choose Sandvik due to good quality and production rates, dedicated, professional service and good parts supply.”
