Haver XL-Class is a vibrating screen on steroids
The XL-Class vibrating screen from Haver Australia is a low-maintenance unit with screening surfaces up to 36 square metres giving the ability to replace up to two inclined screens in virtually the same footprint and produce large volumes of tonnage —up to 15,000 tonnes per hour.
The screens are driven by exciter drives, which Haver says provide smooth operation and high uptime: "The linear stroke is generated by counter weights, which are mounted on two machined shafts and spin in opposite direction via two heavy-duty spur gears mounted on a nodule iron casting.
"This casting mounts to the heavy-duty exciter bridge. The bridge is the main exciter support, which can be constructed up to 4.3m wide, and transmits dynamic force through the entire structure. In addition to better operation, the exciter design increases bearing life by up to 50,000 hours."
Because of this, Haver recommends the XL-Class for applications requiring maximum reliability, such as iron ore and the SAG mill process.
Haver, a German-based group which has been developing and producing mineral processing technology for more than 125 year, says it designed the XL-Class using Finite Element Analysis (FEA), which simulates real-world conditions and provides information about stress points, natural frequencies and harmonic responses.
This means that design concepts can be redefined prior to the production process, Haver Technical Manager Dominik Vennewald says: "This allows setting up each screen’s stroke, speed and other variables to enhance efficiency and ensure it operates up to capacity."
Vannewald says the XL-Class can also be configured as a banana screen.
"The decks are sloped to increase the speed of the material flow in order to further enhance production rates," he says, adding, "This approach is especially effective when the feed load contains a large quantity of fines that are much smaller than the opening of the screen media."
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