Primary crushing plant with Wobbler Feeder in Italy

Customer: Cementeria di Costantinopoli Barile,Italy

Primary crushing plant with apron feeder, stepped wobbler feeder and impact crusher

Plant Description

& EPR GmbH has built a new primary crushing plant for the Cementeria di Costantinopoli cement works inBarile,Italy The plant design incorporates the very latest technology with one prescreening stage

The quarried material is transported to a hopper, from where it is extracted by a 10metre long heavyduty apron conveyor The spillage material underneath the apron conveyor is collected by a lightweight scraper chain conveyor

Because of the high percentage of fines in the feed material, a wobbler feeder has been installed upstream of the impact crusher to screen off the <60 mm material prior to the crushing process

This reduces the demands on the crusher and also eliminates abrasive fines from the crusher feed The screening surface of the wobbler feeder comprises a number of rotating shafts spaced at defined intervals, through which spaces the fines can pass

Fitted onto the shafts are discs sized appropriate to the desired separation point These discs are of elliptical/triangular shape which support the conveying process and prevent jamming For this particular application, a twosection feeder design was chosen, with a step in the direction of material flow, thus promoting the agitation and breaking up of the material and consequently improving the screening performance of the machine even further

The crushing operation is effected by one of ’s wellproven impact crushers, an APPMH 1615, which in addition to its rugged GSKtype rotor is distinguished by the hydraulicallyactuated impact apron adjusting system which ensures that the aprons are retained in their set position during operation On overloading or entry of tramp metal, the aprons can retract in a controlled manner, and then immediately return to their prescribed setting position

Thanks to this hydraulic system, a high degree of operational safety is maintained with a consistent product quality Another feature worthy of mention is the hydraulicallyactuated inlet chute plate; should an excessivelysized rock be wrongly fed to the crusher and become jammed in the inlet, the chute plate can be moved at the push of a button and with simultaneous raising of the impact plates, the offending rock released into the crusher

Technical Data:

Feed material:   Limestone

Feed rate:   420 t/h

Feed size to the wobbler feeder:   0 – 1,000 mm

Wobbler prescreening at:    60 mm, approx 100 t/h

Feed size to the impact crusher:   60 – 1,000 mm

Product granulometry:    at least 95 % < 65 mm

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