The Largest Crushing Plant in the Iranian Cement Industry

Customer: Abyek Cement Company  Abyek, Iran

 Technical Data

Feed material:Marl(60%) and Limestone (40%)

Capacity: 2,400 t/h

Feed size to wobbler feeder: 0 – 1,500 mm

Wobbler feeder prescreening: at 70 mm, approx 600 t/h passing through

Feed size to impactor: 70 – 1,500 mm, approx 1,800 t/h

Product size: approx 90 % < 75 mm

Discharge belt conveyor: B x L = 22 m x 322 m, capacity 2,800 t/h

 Plant Description

& EPR GmbH has erected a new primary crushing plant for the Abyek Cement Company, one of the major cement producers inIran The concept was successfully achieved by constructing a state of the art plant incorporating 2 apron conveyors and a prescreening unit for the processing of the raw material components marl (60 %) and limestone (40%)

The marl is dumped into the main hopper, from where it is extracted by a rugged, 14metre long apron conveyor The limestone is extracted from a smaller hopper by a second apron conveyor at rightangles to the marl conveyor

Due to the high percentage of fines present in the feed material, a wobbler feeder is installed upstream of the impactor to eliminate the < 70 mm fraction from the material flow; in this manner, the material flow rate to the crusher is reduced and at the same time the abrasive, wet fines kept away from the crusher The wobbler feeder surface comprises a series

of rotating shafts spaced at defined intervals and onto which are welded triangular discs; the shaft spacings allow the unwanted fines to pass through the resultant gaps The wobbler feeder is designed to handle some 2,400 t/h, with a maximum of about 600 t/h fine material being expected to pass through

Thanks to the high percentage of fines removed from the material flow, the size of the impactor could be reduced and a smaller model selected Nevertheless, the Impactor Type APPMH 2525 with a capacity of 1,800 t/h is still the largest impact crusher in the Iranian cement industry In addition to the rugged GSKtype rotor, the impactor is characterised by its HAZtronic hydraulic impact apron adjusting system, which secures the aprons in their preset position

On overloading or on entry of noncrushables, the impact aprons retract in a controlled manner, returning to their original settings as soon as the hazard has passed The gap settings can be altered at the touch of a button, either at the machine itself or from the control desk The hydraulic control system provides for ease of operation, an extremely high degree of operational safety and a consistent product quality

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