Third-generation stone quarries – Liebherr L 556 User Manual
Page 42
42 // Quarrying
Third-generation stone quarries
The family business was founded in Warendorf in 1936 by
Hermann Lanwehr. The quarry business was added in 1963. The
quarry mines hard limestone with approximately 45 % calcium,
which even today is still extracted using a blasting process in the
berm system. Lanwehr produces high-quality materials for road
construction. For several decades, the company has been
renowned as a reliable partner of the construction industry, one
that stands for quality products and a broad range of aggregates
for the concrete industry and for road construction. The main
customers, such as asphalt mixing plants and concrete works,
are based primarily in the nearby Ruhr and Münsterland regions.
In 2010, Thomas Lanwehr extensively restructured the company.
He explains the background. “Our quarry face is about 2,300
feet from the final processing point and from where the goods
are loaded onto the customers’ trucks. We used to cover that
distance with dump trucks, later with dumpers. That represents
an enormous expenditure for investment, operating and personnel
costs. Three years ago, I changed all that and purchased a
three-section conveyor belt system. The material is now
transported out of the pit via several layers. The final processing
machines also used to be located closer to the face, but that
meant our customers had to drive too far down to the quarry.
Today, we sometimes have 60 trucks come at once. That can
cause congestion on our access roads.”
Managing Director Thomas Lanwehr has restructured
the process at Lanwehr Naturstein.
Like grandfather, like father, like son. The Lanwehr family has been quarrying limestone at Arnsberg-Müschede
in North Rhine-Westfalia since 1963. Production is now about 4400 tons per day. With 12 employees,
the company managed by Thomas Lanwehr produces around 1.1 million tons of fine grit and mixtures for the
construction industry. Three years ago, Lanwehr completely replaced all its dump trucks and dumpers
with a 2,300-foot conveyor belt system.
Feature: Lanwehr