For screening high-quality silica sand in a sand pit in the administrative district of Sigmaringen in southern Germany, Emil Steidle & Co. placed its trust in the Kleemann mobile screening machine MOBISCREEN MSC 702i EVO with Dual Power.
Emil Steidle & Co.’s newly acquired plant has a wide, large screening surface that can deliver a very high output. Additionally, Kleemann provides an option for the all-electric operation of the machine – a future-oriented drive system that works on-site without CO2 emissions, a positive feature for the environmental balance and quality assurance. To guarantee the power supply on-site, Emil Steidle & Co. built a transformer station that accompanies the machine, which is moved two to three times a year.
The MOBISCREEN MSC 702i EVO with Dual Power is Emil Steidle & Co.’s first machine with an electric drive. The firm is using it to generate quality final products for, among other things, sports ground construction, glass production and building materials such as plaster or adhesive.
Achim Haßdenteufel, section manager at Emil Steidle & Co., and his team were already thrilled with the machine’s performance during the first test run. “We looked at different machines, tested them on site and compared the output. Our material here is very specific. We have a lot of clay in the raw sand that clogs the screens”, says Haßdenteufel. And facility manager Walter Kieper adds: “The machine has an impressive output. Everything can be operated very conveniently by remote control. Although our employees, who have been used to control via hydraulic levers up to now, had to reorientate, they quickly managed to cope with the digital display. Everything is clearly arranged, and it has an intuitive design.”
The refined technical details of the MSC 702i EVO meet the high demands of the material. The configuration of the belts on the machine, for example, can be mirrored. The fine grain conveyor and middle grain conveyor can, therefore, be installed either on the right or left, and the travel distance of the wheeled loader can be kept as short as possible. This also reduces the power consumption and wear on the vehicles.
The MOBISCREEN MSC 702i EVO is equipped with a vibrating slotted grate. Large sandstones can, therefore, be separated in advance, and the machine can be loaded with a 0 – 50 mm feed size. The upper deck is used as a relief deck; the second deck defines the target grain size. The stepless setting option of the belt speed contributes to energy efficiency: As the screening process in the sand pit merges the discharge of the middle grain conveyor and fine grain conveyor, only one side discharge conveyor is actively operated. The speed of the second belt is throttled to save energy. The reduced speed is also an advantage when the feed material is very wet, as Michell Blasczyk from WIRTGEN DEUTSCHLAND Vertriebs- und Service explains: “Sand is not always the same. Depending on moisture content and properties, the covering, inclination angle, speed and many other factors must match exactly.”
During set-up, the operating company also placed their trust in support from the Kleemann experts – among other things, from specialist departments who prepared precise flow charts or the Kleemann laboratory that examined the material exactly in advance.
