In recent years, Hunan Yan Run Construction Engineering (Hunan Yan Run) has focused on real-estate groundworks alongside its regular production and sale of construction aggregates and slate. To continue growing and supplying aggregates and materials, the Chinese company identified a need for a modern, versatile and highly productive crushing and screening solution. It led Hunan Yan Run to contact Sandvik Mobiles China distributor, POTA Environmental Technology (POTA), who recommended the highly effective combination of a Sandvik QI442 HS tracked impact crusher with modular triple-deck hanging screen and a QA335 Doublescreen.
The winning solution gave the company a mobile crushing and screening solution with the highest environmental credentials and features that would ensure highly productive and profitable operation.
Furthermore, the combination of an impact crusher with a triple-deck hanging screen on the QI442 HS was seen as the ideal combination for the 2018-founded company’s diverse requirements.
Hunan Yan Run was aware of Sandvik Mobile Crushers and Screens’ reputation as a manufacturer with the highest standards. Furthermore, as POTA supplies equipment and provides aftermarket support, including spare parts, commissioning and technical advice, the firm knew that the care of its new equipment would be in the safest possible hands. Its Sandvik QI442 HS and QA335, which is part of Sandvik’s unique Doublescreen range of tracked screeners, come with a pre-screen to ensure maximum scalping capability and to prevent any undersize material passing through the impactor, thus 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 with the underpan feeder drastically reducing spillage usually associated with impact crushers. The crusher’s CI621 Prisec Impactor, which comes with a host of innovations for improved efficiency and greater safety during maintenance, provides the ability 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.
Another major benefit incorporated into the QI442 HS model is the modular hanging screen system. This is interchangeable and offers the flexibility for the crusher to operate in an open or closed circuit. The unique design enables set-up in less than 30 minutes and can be fitted without additional lifting equipment. The patent-pending hanging screen option delivers multi-functionality as a one, two or three-way split screener and operation 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 product removal (180°). The tail section can be raised hydraulically to give improved ground clearance for transport when loading or unloading. Combined with the Doublescreen action of the QA335, Hunan Yan Run now can produce highly accurate gradings and fractions in one swift and effective process.
As with all Sandvik’s tracked range of crushing and screening equipment, both models are fitted with the Sandvik My Fleet remote-monitoring system as standard. Sandvik My Fleet has been developed to help customers know exactly how their equipment is being utilised. By collecting and accurately monitoring a wide array of parameters, this facilitates accurate production forecasting, ensuring that the most efficient use is obtained from equipment, thereby maximising return on investment.
The user-friendliness of the equipment has also proved to be of direct benefit to Hunan Yan Run. Features endemic to Sandvik Mobiles products have enabled the excavator and wheeled loader operators to combine activities efficiently and effectively with the QI442 HS and QA335. This has benefitted the operators and made the entire aggregates production process more efficient, thereby directly contributing to Hunan Yan Run’s improved profitability and leading to a highly satisfied customer.
The company had quite exacting requirements for any new crushing and screening plant. It would have to accept feed size of around 500mm and produce highly accurate fractions (0-5mm, 5-10mm, 10-20mm, 20-31.5mm) at a constant production rate of 200-250 tonnes per hour.
Since commissioning by POTA technicians who continue to support Hunan Yan Run in the field, the Sandvik crushing and screening combination has consistently worked at 250 tonnes per hour, producing the required fractions very accurately.
The company has also been pleased that the Sandvik Mobiles QI442 HS and QA335 Doublescreen have proven to be easily maintained and serviced. This ensures that any machine downtime is limited while also proving versatility in dealing with any unexpected requirement. This combination is now producing the aggregates Hunan Yan Run required, rewarding the trust the company placed in the Sandvik brand and the reputation of both POTA and Sandvik Mobiles to deliver high-quality performance.
Located in the economically buoyant Hunan Province in the Pearl River Delta business area, Hunan Yan Run now employs over 100 staff. Along with its new Sandvik Mobiles plant combination, the company has invested in over 40 pieces of construction machinery, including excavators, wheeled loaders and breakers. Additionally, crushing and screening work is done by stationary as well as mobile units.
