Spezialkonstruktion für Spezialanwendung

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The Rockster impact crusher R900 crushing coal to 0-10mm and 10-32mm in the harbor of Ventspils (Latvia).
Customized R900 impactor for coal crushing in the Latvian harbor
AVV Baltic Service OU is Rockster’s new dealer for Latvia and is specialized in selling harbor material handling and earthmoving equipment. For a client situated in Ventspils in the west of Latvia they needed an impact crusher customized for special requirements in coal crushing at a harbor coal handling terminal.
altic Service Vertriebsleiter Karlis Vecbastiks, GF Andis Ratnieks, Rockster Verkaufsleiter Norbert Feichtinger and Baltic Service technischer Leiter Janis Skruders vor der R900.
“Our client has to handle an increasing amount of coal transit and therefore needs additional crushing equipment. The coal comes from Russia in bigger fractions that contain metal parts. The material is than crushed to a fine end-product according to clients’ needs and the metal is separated, which is essential for high quality coal, before it’s transported to Western Europe by a vessel,” says Karlis Vecbastiks, sales manager at Baltic Service.
Extension of the hopper walls

Austrian quality combined with flexibility

We chose Rockster because it’s an Austrian high quality manufacturer with a lot of experience in developing crushing solutions. We really like the hydraulic concept and the Duplex system,” says Vecbastiks. Due to the hydraulic concept of Rockster machines, the speed of the crusher, the conveyors, the screen, etc. can be continuously adjusted, so it is simple to fully adapt to different materials or customer needs. The crusher is also very easy to operate and maintenance work on the machine can be done quickly and effectively. With the DUPLEX option, Baltic Service is able to change the R900 impact crusher to an R800 jaw crusher within a few hours. In that case the range of applications increases with only purchasing an additional jaw crusher unit, the basic machine stays the same.

Modification of the R900

Another reason why Baltic Service decided to focus on Rockster crushers was the possibility for individual modifications on the machine itself. Rockster’s technical department has developed a custom made options for the R900 such as the extended hopper walls and a new system for using the return belt as stockpile belt. These modifications were important for the customer as the crusher is fed using portal cranes, where the clamshell grab capacity is about 9m³. In open position the grabs are much wider than the standard width of the hopper, so the extension of the hopper walls solves the problem of material overflow due to this heavy-duty application. Moreover, a stronger magnet was required, and the solution has been found very quickly.

A long stockpile belt with a discharge height of more than 3,5m is important for the coal handling in the harbor.

Screening system for defined final product

The production of coal depends on many different requirements, which are specified by either the coal mine or the end users. “The finest required fraction at the coal handling terminal is 0-10mm, this is what we receive through the screenbox from the main belt, grain with a diameter of about 10-32 mm is led via the oversize belt to the stockpile belt. The optional screenbox is crucial for us to get exactly defined final end-product,” explains Vecbastiks. With the modified solution of the return belt, it is very simple for the customer to use it as return as well as stockpile belt.

Easy adaption to different customer requirements with Rockster’s R900.

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