Lehigh Cement Company (Heidelbergcement Group) ordered a semi-mobile limestone crushing plant at HAZEMAG for their Union Bridge works. The plant is going to process up to 2500 t/h of limestone with a feed size of up to 2000 mm. The material is discharged by means of a HAZEMAG apron feeder HAF 25160 from a 400 t feed hopper. The fines in the feed material are screened at 100 mm on a HAZEMAG roller screen HRS 2638.
The HAZEMAG primary impact crusher HPI 2230 crushes the material down to D99 < 125 mm. The impact crusher is fitted with hydraulically adjustable impact aprons and grinding path which both retracts in a controlled manner under excessive load. The system of the retractable grinding path is patented. The impact crusher HPI 2230 is furthermore fitted with the automatic gap width control HAZtronic.