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Rock Dust/Fillers and Crushed Sands

In Germany, the production of solid rocks covers most of the stratigraphic periods with a deposit concentration in the range of paleozoic times. The rocks have a wide variety and include magmatic and metamorphic as well as chemical and clastic sedimentary rocks.

During the dry processing of solid rocks, millions of tons of fine grained rock dust/fillers with a maximum grain size of about 0.2 mm are produced. They are only available as dust-dry silo material, which significantly limits the application in the brick and tile industry. Depending on the quarry size , the amount of produced rock dust/fillers per location varies between 5,000 and 90,000 t a year.

Quartzite flour granulate with the opportunity for ship loading/Saartal (2012)
Quartzite flour granulate with the opportunity for ship loading/Saartal (2012)
Pipe screw conveyor to humidify the rock fillers/Sauerland (2015)
Pipe screw conveyor to humidify the rock fillers/Sauerland (2015)
Loading of greywacke granulate on a dump semi-trailer/Sauerland (2015)
Loading of greywacke granulate on a dump semi-trailer/Sauerland (2015)

A new trend is the homogeneous humidification/granulating of the rock dust/fillers up to a material humidity of 8%. This is done for example with pipe screw conveyors before loading. Valuable residual material, which were previously unusable, are now available as dust-free bulk goods and can be transported with conventional dump semi-trailers.

In the brickworks their handling is easy and only comes with advantages. For example, the fine-grained granulates can be used to optimize masses and even raw materials, which have an exceeding humidity. Due to the fine-grained structure, the granulates do not have to be crushed with high energy expenditure. With an appreciable content of feldspars and phyllosilicates, these residual materials are also interesting with regard to the drying and firing properties.

We hope the following examples will help you or inspire you to some forwarding ideas.

A selection of rock dust/fillers can be found in the chart below. Analogue access via raw material map.

Gewinnung von Phyllitschiefer/Polen (2014)

Rohstoffkarte

Rohstoff-Datenblätter

Reference Number Raw Material Location Type Image Data Sheet
6418 Langacker 56299 Ochtendung Rock Dust/Filler and Crushed Sand Download
6414 Bilstein 59929 Brilon Rock Dust/Filler and Crushed Sand Download
6413 Silbach 59955 Winterberg Rock Dust/Filler and Crushed Sand Download
6409 Pilawa Górna 58-240 Pilawa Górna, Polen Rock Dust/Filler and Crushed Sand Download
6389 Bramburg 37139 Adelebsen Rock Dust/Filler and Crushed Sand Download
6377 Kirchheimbolanden 67292 Kirchheimbolanden Rock Dust/Filler and Crushed Sand Download
6375 Blasbach 35585 Blasbach Rock Dust/Filler and Crushed Sand Download
6367 Berge 59872 Meschede Rock Dust/Filler and Crushed Sand Download
6366 Listertal 58540 Meinerzhagen Rock Dust/Filler and Crushed Sand Download
6320 Michelbach 66839 Schmelz Rock Dust/Filler and Crushed Sand Download
6315 Heberndorf 07343 Wurzbach Rock Dust/Filler and Crushed Sand Download
6274 Ellrich 99755 Ellrich Rock Dust/Filler and Crushed Sand Download
6225 Neu-Bamberg 55546 Neu-Bamberg Rock Dust/Filler and Crushed Sand Download
6224 Neu-Bamberg 55546 Neu-Bamberg Rock Dust/Filler and Crushed Sand Download
6219 Henau 55490 Henau Rock Dust/Filler and Crushed Sand Download
5049 Hüttengrund 96515 Sonneberg Rock Dust/Filler and Crushed Sand Download