Sonderbach in Heppenheim is the production site for Röhrig, a company with a strong tradition that is already quarrying granite under the management of the third generation of the owning family. Its exceptionally wide range of products is one reason why Röhrig regards its “closeness to customers” as being more than just geographic in meaning – thanks to its huge innovative force, the company has established itself both regionally and internationally as a reliable materials supplier in different industry sectors. The company’s technical know-how keeps pace with the growing market requirements.
For its mineral processing, Röhrig had already been using a stationary jaw crusher of the type C160 supplied by Metso Minerals since 1992. This crusher was only replaced at the beginning of this year with a further developed successor of the same series (Fig. 1). The C series from Metso is specially designed for primary crushing of hard rock and can easily handle even the hardest feed materials. Fortunately the new stationary jaw crusher has identical dimensions so it can use the enclosure from the old crusher. Marco Röhrig, company director in the third generation, is expecting the successor model with its different enhancements to reach a service lifetime as least as long as that of its predecessor.
The sidewalls of the new C160 are around 10 % thicker, the hydraulic clamping cylinder is larger and more powerful. Metso has strengthened the transverse ribs of the pitman at the sides from 58 to 75 mm and on the inside from 66 to 100 mm. Another advantage is the integral motor base, a component that in models from other manufacturers is usually positioned outside the crusher. This fortunate situation has led to Röhrig being able to reuse the enclosure without any need for further conversion work.
With the reworking of the drive and flywheel guard, the C160 was also able to score extra points. Thanks to the more rugged design, fewer components are needed and therefore installation and maintenance are simplified. Access to the motor alone is much easier. Under the direction of Metso’s Site Supervisor Maik Engelstätter, the project (dismantling/installation) was completed within two weeks.
Marco Röhrig will certainly remember the day of the installation for a long time to come: pitman and main frame were delivered separately for the installation day and only assembled and put together once on site. The replacement of the old stationary crusher was completed within one hour (Fig. 2). With a mobile crane, the 85 t crusher was fitted with millimetre precision into the crusher building. Following positioning of the new crusher in the existing steel structure, it was important to optimally secure the crusher despite the confined space available. At a height of 2 m, special vibration dampers prevent the crusher sliding off the support (Fig. 3). After installation of all power lines, the trial run with feed material was performed around one week later.
Parallel to the installation of the C160, which is also the first crusher of the latest generation supplied in Germany, a new Metso cone crusher of the type GP100 was also installed at Röhrig’s high-grade chippings plant. Marco Röhrig assumes that the technological upgrade of the new Metso crusher can only give Röhrig advantages globally. Röhrig attaches great value to consistent product quality, maximum value creation and optimum refinement of its product ranges. Against the background of Röhrig’s raw material reserves which are sufficient to cover the next 150 years, the company can without hesitation continue its development under the banner of “class not mass”.