Efficiency Starts Right on Site

At one of the many quarries operated by the Hengl Group, two mobile processing plants are currently in operation: the jaw crusher JAWMAX® 450 as the primary crushing stage, and the impact crusher REMAX 300 with a double-deck screening unit as the secondary crushing stage. The assignment: processing road construction materials, mechanical stabilisation aggregates, chippings, and sands from crystalline marble – a particularly hard natural rock. Both plants were supplied by our dealer ing. erwin hofstätter GmbH mineraltech. 

The feed material places high demands on the machinery deployed. This makes the right choice of equipment and the precise coordination of the individual crushing stages all the more important.

Directly from the blasted rock, the mobile jaw crusher  JAWMAX® 450 takes over the primary crushing. A 30–35 tonne excavator feeds the plant, which reliably processes around 250 tonnes per hour at this performance level. The pre-crushed material leaves the first stage with a particle size of approximately 180 to 220 mm – ideally prepared for the downstream secondary crushing stage.

The REMAX 300 then takes over the fine processing with its double-deck screening unit. With four high blow bars and a medium rotor speed – tuned to the properties of crystalline marble – it produces the final fractions of 0/32 mm and 32/63 mm. Oversize material is recirculated and re-crushed, making the process particularly efficient. If required, an additional triple-deck screening unit can be set up to further split the fine fraction of the REMAX 300 into up to three additional gradations.

Both machines impress not only with their performance, but also with their ease of transport. With a weight under 40 tonnes, relocation costs remain within economically justifiable limits – a decisive factor in mobile operations where flexibility is key. Those looking to optimise cost-efficiency even further benefit from SBM's drive concept "Hybrid Electrified" – enabling particularly energy-efficient operation and delivering lasting reductions in ongoing operating costs.

“From around 20,000 tonnes, a two-stage plant like this can be operated very economically – both in terms of equipment procurement and relocation costs.” – Ing. Erwin Hofstätter

The entire deployment at Hengl is planned for around 12 weeks, with daily production of up to 2,000 tonnes of finished material. This demonstrates that the combination of JAWMAX 450 and REMAX 300 operates reliably and economically even with demanding rock types such as crystalline marble.

The deployment at Hengl impressively demonstrates how outstanding results can be achieved even under challenging geological conditions with a compact, two-stage plant configuration. The close collaboration with our dealer ing. erwin hofstätter GmbH mineraltech ensured optimal plant design and smooth on-site implementation.