From the Industry

Effective crusher load reduction by pre-screening

Most raw materials that have to be pre-crushed for subsequent processing already contain a considerable percentage of fines which do not actually require further crushing. These fine fractions often have fairly high moisture content as well as featuring abrasive inclusions. It goes without saying, therefore, that it is expedient to separate such fine fractions from the feed material flow prior to entry into the crusher. HAZEMAG Wobbler Feeders (Fig. 1) are particularly suited to this task. The screening surfaces of this machine comprise a plurality of rotating shafts, between the defined gaps...

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Issue 07-08/2011

Screening in three fractions

The Wuppertal-based Oetelshofen limestone works supply products ranging from bright white powdered quicklime to solitary limestone of several tons already in the fourth generation. The mineral and...

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Issue 03/2011

HAZEMAG sells wobbler feeder and roll ­crusher to Estonia

VKG Kaevandused OÜ ordered a wobbler feeder (Fig. 1) and a roll crusher (Fig. 2) for processing oil shale in Ojamaa Mine in Estonia. The machines have just passed the acceptance test in HAZEMAG’s...

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Issue 01-02/2010

Fine and very fine screening

Throw screening from the beginning of the 20th century to the present demonstrated by the example of directly excited throw screening machines

1. Throw screening machines directly excited by means of bumpers or impactor bars The development of bumper-type screens [1], which had begun in America at the beginning of the 20th century, was...

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Issue 07-08/2019 Selective

Advances in screening technology in the mining sector

1? Introduction In the mining sector various classification methods are in use. The two most important processes for the separation of specific particle sizes are the hydrocyclone and screen...

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Issue 07-08/2020 New dry recycling process

Soil and building rubble processing with 3-fraction star screen, grizzly screen, impact crusher and air separation

T?he combination consists of the starscreen 3-mta and a windsifter. It can be extended with an impact crusher. The 3-fraction starscreen has a fine and a coarse starscreen deck and a grizzly screen...

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