Guangdong, South China-based Long Ying Construction Engineering has become the first company in China to purchase Sandvik Mobile Crushers and Screens’ revolutionary QI442 HS. The advanced horizontal shaft impact crusher is said to be able to provide highly accurate material reduction at high rates of throughput. Additionally, through the use of Sandvik’s advanced modular hanging screen, it is also able to produce up to three products where and when required.
Long Ying Construction Engineering (Long Ying) has built up a reputation for being a commercially astute operation in a relatively short period. It now services the requirements and needs of the Guangdong region construction industry, operating in such diverse areas as demolition, construction machinery rental, civil engineering contracting, tunnelling, landscaping and environmental engineering, as well as supplying aggregates arising from its multi-faceted operations.
The company now employs around 30 full-time staff. It operates a full fleet of equipment comprising 15 excavators, five-wheeled loaders, stationary trommel screens, three mobile crushing and screening trains and around 12 haulage trucks.
Despite having an expert staff and a wide equipment array, the firm’s crushing and screening equipment was proving unequal to the tasks in hand. The European and Chinese mobile plant it owned were proving unable to produce materials at the required throughput, were prone to breakdowns, with aftermarket support and spare parts often proving difficult to secure. Also, if Long Ying wished to expand its operations throughout other parts of China, support and customer confidence would both be sadly lacking. To arrive at a modern, productive, environmentally friendly high-status solution, Long Ying turned to a Chinese equipment dealer that has developed a first-class reputation in China: Sandvik Mobile Crushers and Screens’ authorised dealer, POTA Environmental Technology – Guangdong (POTA).
As well as 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. Hence, as part of its mission to provide professional solutions regarding environmental issues, the company acts as a highly proficient Sandvik distributor, supplying the full range of mobile crushing and screening services and support.
When contacted by Long Ying and having gained an understanding of what solution the company was seeking, POTA recommended Sandvik Mobiles QI442 HS, one of the Swedish manufacturer’s latest plant solutions. This provided Long Ying with a mobile crushing and screening plant with the highest environmental credentials, as well as possessing features which would enable highly productive and profitable use. This requirement was based on crushing and screening mainly rocks, bricks, concrete and other materials arising from demolition and excavation projects the company undertakes. The combination of an impact crusher with a double-deck hanging screen was seen as the ideal combination to produce aggregates for road construction as well as concrete and asphalt plants.
Due to the well-known capabilities of the Sandvik crushers and screens, Long Ying was pleased to follow POTA’s recommendations.
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 ensures maximum scalping capability and prevents any undersize material passing through the impactor, maximising throughput and reducing wear costs. It 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. At the same time, an under pan feeder located beneath the impactor protects the primary 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 enhances safety and meets legislation requirements.
With a host of innovations for improved efficiency and enhanced safety during maintenance, the QI442 HS can 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.
Another 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 unique 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 one-, two- or three-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 is hydraulically rotatable 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. My Fleet helps customers know exactly how their equipment is used. The monitoring of a wide array of parameters enables accurate production forecasting, ensuring optimal machine use efficiency, thereby maximising return on investment.
Long Ying is now using its state-of-the-art 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 200 tons per hour. The latter figure, given the ‘difficult’ nature of the material, exceeded Long Ying’s expectations. Furthermore, although initial investment costs were higher for the QI442 HS when compared with local or other EU manufacturers, the total production cost proved to be significantly lower, making the return on investment attractive.
Long Ying is keen to expand its working relationship with Sandvik Mobiles and Screens via POTA. A company spokesperson said: “We’d like to expand as a business and cooperate with Sandvik to offer nationwide full product lifecycle 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 engineers gave their full support until the machine was fully operational. We really appreciate the service.”
As to the performance of the QI442 HS, the Long Ying spokesperson 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 per 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.”
