Crushing With Rubble Master Electric Equipment Yields Big Savings

Published: 4/3

German contractor Welbers Kieswerke crushes up to 110t of gravel per hour with its RM 100GO! hybrid, fully electric machine, with a fully electric drive reduces energy costs by around 50%. In addition to protecting the environment, Welbers’ annual operating costs are cut by 11%. And thanks to the hybrid crusher, they can crush other materials, such as C&D waste in addition to fully electric gravel processing.

Welbers purchased the RM 100GO! hybrid to process gravel to the highest quality 0-16 fraction final aggregate. Although the company was initially skeptical about the performance of the RM crusher, a test run in May dispelled their concerns. The RM 100GO! processes .63- to 1.5 in (16- to 40mm) gravel and oversize feed material of 1.26 to 5.1 in (32 to 130 mm) to produce the highest quality final aggregate.

In addition to processing gravel, Welbers also tested the machine briefly with C&D waste. The machine confirmed what many satisfied Rubble Master machine owners from the surroundings have already discovered: a finished 0 to 1.77-in (0- to 45mm) final aggregate, as well as a screened oversize aggregate at a high output with good operating costs.

The aim of leaving land in better condition from an ecologically standpoint than it was before excavation started, has always been the philosophy of the Welbers family business, which is why they decided to go for the hybrid version of the RM crusher, in addition to capitalizing on the grid connection they already had on site. Now nothing stands in the way of emission-free, fully electric operation. An attractive side advantage is the saving on running costs: already high fuel costs are reduced by using electricity. Since taking delivery of the new machine in June, it has already saved EUR 1000 on diesel.

Previously, hardly anybody processed gravel fully electrically using mobile crushers. All that’s needed is the 50-ft (15m) cable to the grid transformer station. This simple step sees the machine ready for action in just a few minutes.

Because the crusher is mounted on a chassis with crawler gear, they can move from processing gravel in electric mode to crushing C&D waste directly on site in diesel mode. In contrast to the processing of C&D waste being outsourced, as it was previously, this can now be done flexibly and independently at any location. Welbers has processed several thousand tons of gravel since July, and all without fuel. The company plans to follow a processing schedule, whereby every couple of months C&D waste will be crushed for two to three weeks. The rest of the time they will process gravel in fully electric mode. They will therefore crush around 40,000t of gravel a year using power from the grid.

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