R900 Special construction for coal crushing

Team Baltic Service with Mr. Feichtinger

 R900 special construction for special application

Impactor R900 was customized for coal crushing at the harbor of Latvia

For a client situated in Ventspils in the west of Latvia, Baltic Service (Rockster dealer in Baltic states) needed an impact crusher individualized for extraordinary requirements in coal crushing at a harbor coal handling terminal.

“Our client has to handle an increasing amount of coal transit and therefor he needed additional crushing equipment. The coal comes from Russia in bigger fractions containing metallic parts. It is crushed to fine grain, according to the different needs of the clients and separated from metal what’s essential for high quality coal, before it’s transported to Western Europe by vessel,” says Karlis Vecbastiks, sales manager at Baltic Service.

Rockster-Impact-crusher Prallbrecher-R900 Coal-Crushing-Latvia Kohle-brechen Lettland 05Austrian quality mixed 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 adapt perfectly to every material and grading.

The crusher is also very easy to operate and maintenance work on the machine can be done quickly and effectively. With the Duplex-System, Baltic Service is able to change the R900 Impact Crusher to an R800 Jaw Crusher within a few hours. So the range of applications gets wider with only purchasing an additional jaw crusher unit, the basic machine stays the same.

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Modification of the R900

Another reason why Baltic Service decided to focus on Rockster crushers was the possibility for individual modifications on the machine.

Rockster’s technical department developed supplements for the R900 crusher like the extended hopper walls and designed 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.

Screening system to define final grain

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The production of coal depends on many different requirements specified by the coal owners and 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 grain,” 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.