Canadian Mining Journal

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CRUSHER: ThyssenKrupp eccentric roll primary crusher more efficient underground or on surface



The new 3,000-t/h ThyssenKrupp ERC25-25 primary crusher works as well underground as it does in surface applications.

GERMANY – With the development of a completely new type of crusher, the so-called eccentric roll crusher type ERC25-25, ThyssenKrupp has achieved a quantum leap in primary crushing.

The new crusher features a particularly flat and robust design and high throughputs of up to 3,000 t/h, enabling it to process hard rock and ores efficiently and economically in underground mining operations. As the centerpiece of a mobile or semi-mobile system the eccentric roll crusher also enhances cost efficiency in surface mining.

The newly developed and patented design featuring a roll mounted eccentrically between the crushing and the screening chamber offers greater efficiency and productivity compared with other crusher types.

One of the key advantages of the new crusher is its flat and compact design with integrated screen. It is 20% to 50% lower than conventional primary crushers. This greatly simplifies transportation, installation and maintenance below ground. If required, the crusher’s height can be reduced further for installation by removing individual components, saving additional time and costs.

In the large crusher infeed area, the material to be reduced is divided into two material flows. The first with fine material is screened out and passes through the screening chamber to a discharge conveyor. The second stream with coarse material is transported to the crushing chamber and reduced between the eccentrically mounted roll and the chamber walls.

In addition to higher production, this design also requires less maintenance. Keeping the fine material out of the crushing chamber reduces the power consumption of the electric motor and significantly reduces the load on the machine. An integrated automatic gap adjustment system with overload safety device also offers good protection in the event of non-crushable foreign material.

The symmetric arrangement of the roll permits the eccentric roll crusher to be balanced with great precision. With additional balancing weights it can be balanced almost completely. This lowers machine vibrations when idling and significantly reduces the loads on surrounding structures compared with other primary crushers. That makes the new crusher ideal for use in mobile crushing systems.

In the future, the new series will be supplemented with further models to enable both smaller and higher throughput capacities for different applications.

Find more information at www.ThyssenKrupp-industrial-solutions.com.


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