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LFM™ Harp Wire Increases Throughput & Screen Life In Coal Operations

Thursday, August 26th, 2010

LFM™ Harp Wire from Montreal-based Major Wire Industries Limited helps solve blinding and screen wear challenges in coal processing applications. Clay content within coal can cause severe blinding problems on traditional woven wire, slotted or polyurethane screen media, resulting in significant lost screen capacity and hours of downtime to clean the media. Because coal is also very corrosive, it quickly wears out traditional woven wire screens. Major Wire’s high-performance LFM Harp Wire is manufactured with straight wires firmly molded into polyurethane strips that hold the wires in place at the crown bar. The flexible polyurethane strips keep the wires equally tensioned, creating superior screen vibration when compared to traditional woven wire, slotted and polyurethane media, reducing blinding and increasing production of a cleaner coal product. In addition, LFM Harp Wire’s long slots (up to 12 inches) provide more open area to increase screen capacity. LFM Harp Wire is available with stainless steel wire, which is renowned for its tough wear characteristics.
In order to combat blinding, some coal producers opt to increase the size of their woven wire screen boxes—increasing capacity, but at great expense. Other producers will shift to polyurethane panels or slotted screens to improve wear life; however, polyurethane requires modification to screen boxes and both options often decrease screen capacity. By using LFM Harp Wire, producers can eliminate these problems while putting more spec product on the ground due to less downtime for cleaning or replacing screens—providing greater return on investment without the need to make major screen box changes.
LFM Harp Wire screen media is available in custom configurations to match unique screens and applications. Producers can choose the number and placement of polyurethane strips; a wide range of wire diameters per opening sizes; optional polyurethane intermediate strips for better wire stability and spec material control; and an optional polyurethane side seal, which provides the tightest possible seal.
(Ref 1673)

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