The HSI (Horizontal Shaft Impact) crusher is designed to provide highly accurate material reduction at high rates of throughput. It utilises Sandvik’s advanced modular hanging screen to produce up to three products where and when required.
Long Ying Construction Engineering operates in the Guangdong region of China. It serves the demolition, construction machinery rental, civil engineering contracting, tunneling, landscaping and environmental engineering sectors, in addition to supplying aggregates arising from its multi-faceted operations.
The company employs around 30 full time staff, and operates a fleet of equipment comprising of 15 excavators, five wheeled loaders, stationary trommel screens, three mobile crushing and screening trains and around 12 haulage trucks.
Long Ying purchased the QI442 HS crusher through POTA Environmental Technology (Guangdong), Sandvik Mobile Crushers and Screens authorized distributor. In addition to being a supplier of high quality construction solutions, POTA has also developed a reputation for expertise in the use of advanced dust and exhaust gas treatment technology, solid waste recycling technology and equipment for mining, municipal works and civil engineering. It supplies the full range of mobile crushing and screening services and support for Sandvik products.
Long Ying requirements for a new crusher were based on crushing and screening mainly rocks, bricks, concrete and other materials arising from demolition and excavation projects the company undertakes. The QI442 HS machine's combination of impact crusher with double deck hanging screen was seen as the ideal combination 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 designed to improve the return on investment and experience for the operator. 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 patented rotor locking and positioning device for controlled rotor movement during maintenance which is designed to enhance safety and meet legislation requirements. The QI442 HS is able to operate in either primary or secondary crushing modes. Additionally, the two hydraulically assisted curtains can be readily adjusted to produce a wide range of high quality product sizes.
One of the benefits incorporated into the QI442 HS is the optional double-deck modular hanging screen system. This system is interchangeable and offers the flexibility for the crusher to operate in open or closed circuit. The design enables set-up in less than 30 minutes and can be fitted without the use of additional lifting equipment.
The patent pending hanging screen option delivers multi-functionality as a 1, 2 or 3-way split screener, as well as an 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 the Sandvik My Fleet remote monitoring system as standard. My Fleet has been developed to help customers know exactly how their equipment is being utilised. Through the monitoring of a wide array of parameters, this is designed to facilitate accurate production forecasting, and ensure that the most efficient use is obtained from equipment, thereby maximising return on investment.
Long Ying is now using its QI442 HS crusher to crush mainly construction and demolition waste with a maximum feed size of 800mm, producing two core products: 0-10mm and 10-40mm, at an average production rate of 200tph. Sandvik says that the latter figure, and given the ‘difficult’ nature of the material, exceeded Long Ying’s expectations.
Mr Zhang operations manager for Long Ying, commented: “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.”