About 155 million years ago – give or take a year or two – towards the end of the Jurassic period, a warm shallow sea studded with islands covered much of what is now Germany. Lagoons were cut off from the ocean and within these warm, isolated bodies of water, nothing could survive for very long – any organism that fell in from the land or was washed in by the ocean was buried in soft carbonate muds. Today these carbonate muds form a type of fine-grained, flat-cleaving limestone that has been quarried since the Stone Age for roof and floor tiles.
At the Briloner Hartstein Werk (BHW) quarry near Brilon, Germany, a Volvo L350F-Series wheel loader is instrumental in the extraction and transportation of around 1.2 million tpa of this limestone. The machine impressed BHW after just one week, not only with productivity, but with fuel consumption of just 40 liters an hour – saving up to 20% compared with the company’s previous machine.
Scratching the surface
Limestone has been extracted from the BHW quarry for over 60 years and today approximately 950 000 tpa is produced. With the limestone extending to an incredible depth of 0.5 km at the site, BHW has only scratched the surface of the deposit, currently quarrying at a depth of 110 m.
In order to extract the limestone, the material is broken out of the rock face using drill and blast techniques. It is then extracted and transported to the factory, where large rocks are crushed into a wide range of aggregate sizes. The BHW quarry supplies a variety of industries, including construction, building materials, agriculture, and is even used in steelmaking, glass and plastics industries.
The company supplies businesses with limestone for cement production, and when used in agriculture, the stone is finely ground for use in animal fodder and feeds for dairy animals. When used for soil-improving purposes, its primary effect is to adapt the pH value of the soil, equalising the nutrient balance and ensuring improved fertility.
In great company
The Volvo L350F wheel loader was commissioned at the end of January 2014, joining the Volvo EC700C – the largest crawler excavator in the Volvo family – and an L180G wheel loader already in use in the BHW quarry. The L350F loads 60 t haulers in four or five passes, and is equipped with a long boom in order to reach the high loading height of the dump body, as well to protect both machine and tyres from damage during loading. In order to optimise productivity while working with limestone, the L350F is equipped with a 7m3 capacity Volvo bucket and a Boom Suspension System which helps prevent loss of loaded material by reducing shocks and rocking motions.
The all-round package
For managing director Heiko Sykora, the crucial factor in purchasing this machine was the combination of efficiency and services on offer. “From our Volvo trade partner Swecon Baumaschinen, I am not simply buying a machine, but a full service,” said Sykora. “As well as getting a good machine this also includes an all-round service package, such as advice, demonstrations, instruction and, of course, service and maintenance. We feel we have been well advised by Swecon Baumaschinen over the years and enjoyed the best possible support from their Customer Services.”
The four driver-operators have also been impressed with the new wheel loader. “The machine is easy to use, clearly laid out and attacks its task with real substance,” says driver-operator, Karl-Heinz Raschke. “You don’t need to keep your foot to the floor to work effectively, as you have plenty of power in hand. This not only brings down the noise level, but above all reduces fuel consumption. I can return fuel usage figures of just under 40 liters an hour – much less than the consumption of my previous machine.”
The L350F is powered by a 394 kW Volvo turbo diesel engine, which combines low fuel consumption with high reliability and low levels of noise and exhaust emissions. In conjunction with the other Volvo machines at the BHW quarry, the L350F wheel loader ensures the smooth and profitable production of aggregate.
Adapted from press release by Louise Fordham
Read the article online at: https://www.worldcement.com/product-news/21112014/volvo-wheel-loader-in-operation-at-german-limestone-quarry-127/