Liebherr TA 230 Litronic User Manual download pdf (Page 18)

34// Quarrying Quarrying //35

The drivers especially appreciate the

simple controls of the wheel loaders.

Sector:

Size of company:

Founded:

Location:

Managing Director:

Website:

Liebherr machines

in operation:

Company proﬁle

Imerys Ceramics France

Mineral raw materials for the ceramics industry

11 employees

1859

Soumans (23) / France

Christian Maziere

www.imerys-ceramics.com

R 960 SME, R 924 with hydraulic hammer,

ThreeL566 wheel loaders

Sector:

Size of company:

Founded:

Location:

Managing Director:

Website:

Liebherr machines

in operation:

Company proﬁle

Carrières d’Ambazac

Quarrying of construction materials

45 employees

1973

Ambazac (87) / France

Jean-Roger Delanne

www.novapierre.com

www.carrieres-ambazac.fr

L 550,L566,L580,L586, P 724, PR 724,

R 936, R 944 C

“The excavator is very well balanced in its work, and extremely

stable. Its power guarantees good digging force and it is faster

than the R 954. After ten loading cycles, there is a productivity

increase of 20 % between the two models – and fuel consumption

is the same.”

Ambazac attains qualification for C2 gravel

The quarries at Ambazac are the heart of the Les Pierres

d’Ambazac Holding, which were founded in 1976 by the father

of the current company manager, Jean-Roger Delanne. Jean-

Roger Delanne has been working for the company since 1980,

taking over management responsibility initially with his brother,

and then by himself in 2000.

In the coming years he is planning to invest in replacements for

three large crawler excavators and two wheel loaders. “We shall

request an undertaking from Liebherr with respect to efficiency

and availability. The excavator in the quarry is the first link in our

production chain. From Liebherr, I expect the assured efficiency

of 92 % operational availability from the first year, never dropping

below 85 %.” A request that the manufacturer is happy to fulfil.

Imerys Ceramics France: feldspar from Montebras

The feldspar quarry and plant at Montebras are part of Imerys

Ceramics France, a world market leader for industrial minerals.

Imerys Ceramics is part of the Ceramic Materials division of

the Imerys Group. The Group employs 16,000 people in 47

countries. Quarrying takes place over ten months, where by

50 % of the volume produced is delivered to Italian tile

manufacturers. The feldspar is used primarily to manufacturer

large format and “super white” tiles. Other customers are located

in France, Germany and Poland.

Even though a railway line is present on site, the entire production

is now transported by road. “60 % of the production volume used

to be shipped by rail, until 2011, when SNCF discontinued the

service. Apart from the environmental impact, there is a cost

factor that we cannot neglect. One train can take 45 articulated

trucks off the road,” Christian Mazière complains.

The quarry is split into two sectors: the quarry itself and the area

for preparation and shipping. Blasting operations have been

outsourced to the company Alpharoc. Within the quarry, the

material is transported by Dumont TP with two articulated trucks

of the 50-tonne class.

The R 960 SME is primarily used for loading after every blasting.

If necessary, excessively large blocks are made smaller by a

Liebherr R 924 crawler excavator fitted with a hydraulic hammer.

The dumpers secure replenishments for a buffer stock of 10,000

tonnes in front of the crusher. This allows the R 960 SME and the

two dumper trucks to be used for spoil work when this is needed.

The crusher used is a hammer crusher, with two gyratory crushers

attached to produce a 0/8 grain. Depending on the customer’s

specifications and to guarantee constant homogeneity of

production, a chemical test is conducted internally of various

batches of material. These batches are then mixed and put into

stock until they are shipped.

Loading after blasting: the R 936 SME.

Quarrying in profile: Ambazac and MontebrasQuarrying in profile: Ambazac and Montebras

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Liebherr TA 230 Litronic User Manual Page 18

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