8/11/2019 Jurassic Limestone in Montrond Quarry France_en

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Mobile crushers remove mountains.

Processing Jurassic limestone in Montrond Quarry, France

Montrond Quarry in the French Jura Mountains has an estimated raw material

capacity of approximately 10 million m³. Between 1!00 and "000 tons per day of

 Jurassic limestone are processed here into concrete a##re#ate and road

construction materials. $s the roc% is contaminated with clay and soil it is

particularly important to separate these materials from the limestone material

durin# the processin# operation. &n order to be able to produce hi#h'(uality

concrete a##re#ate the (uarry operator decided to use mobile crushin# and

screenin# plants from )leemann. Because of their hi#hly e*ective pre'separation

prior to crushin# these plants fully meet the special re(uirements placed on the

processin# technolo#y in Montrond Quarry.

 +he material is (uarried by blastin# and is then screened and cleaned from

impurities in the heavy'duty double'dec% screen of the Mobicat M, 1"0 - primarycrusher +he #rain sies /0 to 1!0 mm are directly forwarded to the crusher and

onto the main dischar#e conveyor. +he 0 to /0 mm pre'screened material is

stoc%piled via a lateral dischar#e conveyor and is either used as sub#rade material

for local forest paths or also fed into the secondary crusher. +he bypass material

and the crushed roc% of a sie up to "00 mm is transported from the mobile primary

crusher to a secondary crusher type Mobirex M 10 -. 2ere the sie 0 to 1.! mm

is separated on the pre'screen of the secondary crusher and sold as sub#rade

material for road construction.

&n the second crushin# sta#e of the processin# operation the pre'crushed material

ran#in# from 1.! to "00 mm in sie is transported to the Mobirex M 10 - impact

crusher where it is reduced to #rain sies of between 0 and 30 mm. +he #rain sies

0 to "0 mm and "0 to around 30 mm are separated by the sin#le'dec% secondary

screen mounted on the Mobirex plant.

 +he #rain sie "0 to 30 mm 4 the so'called oversie material 4 is fed bac% into the

crusher while the #rain sie 0 to "0 mm is separated further into its individual

a##re#ate fractions on the hi#h'performance screen of the Mobiscreen M5 "0 6. &n

this 7nal processin# sta#e the 0 to "0 mm #rain sie is separated into the four hi#h'

(uality a##re#ate fractions 0 to 3 mm 3 to 8 mm 8 to 10 mm and 10 to "0 mm.

Operating site: Montrond Quarry near Champagnole, France

Feed material9 Jurassic lime

:rocessin# rate9 6aily 1!00 to "000 t

8/11/2019 Jurassic Limestone in Montrond Quarry France_en

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Final a##re#ate

fractions9

0'3 mm 3'8 mm 8'10 mm 0'1! mm 0'/0 mm 0'1!0 mm

;nd products9 concrete a##re#ate road construction materials foundation

material

Machines used9 )leemann <aw crusher Mobicat M,B 1"" -impact crusher Mobirex MB 10 -2

triple'dec% screenin# unit Mobiscreen M5 "0 6'5+5