physical properties of minerals


PHYSICAL PROPERTIES OF MINERALS 

The structural and mechanical properties of common minerals are given in the table below.

ROCK

FORMATION

WORK INDEX (Wi)

SPECIFIC WEIGHT (ton/m3)

BULK DENSITY  (ton/m3)

ABRASION INDEKS  (Ai)

COMPRESSIVE STRENGTH (MPa)

GRANULATION

Andezit

Magmatik

16±2

2,6-2,8

1,6

0,5

170-300

İnce

Bazalt

Magmatik

20±4

2,9-3,0

1,8

0,1-0,3

300-400

İnce (<0,1mm)

Demir Madeni (Hematit)

Sedimanter

11±3

4-5,2

2,4-3,1

0,2-0,8

 

 

Demir Madeni (Magnetit)

Sedimanter

9±3

4-5,2

2,4-3,1

0,1-0,3

 

 

Diyabaz

Magmatik

19±4

2,8-2,9

1,7

0,2-0,4

250-350

Orta-Kaba

Diyorit

Magmatik

19±4

2,7-2,8

1,6

0,4

170-300

Kaba

Dolomit

Sedimanter

12±3

2,7

1,6

0,01-0,05

50-200

İnce-Orta-Kaba

Gabro

Magmatik

20±3

2,9-3

1,8

0,4

170-300

Kaba (>2mm)

Granit

Magmatik

16±6

2,7

1,6

0,4-0,65

200-300

Kaba (>2mm)

Kalker

Sedimanter

12±3

2,7

1,6

0,001-0,03

80-180

İnce-Orta-Kaba

Kumtaşı

Sedimanter

18±3

2,7

1,6

0,3

150-300

İnce-Orta

Kuvarsit

Metamorfik

16±3

2,7

1,6

0,65-0,9

150-300

Orta

Mermer

Metamorfik

12±3

2,7

1,6

0,001-0,03

80-180

Orta-Kaba

Porfir

Magmatik

18±1

2,7

1,6

0,1-0,9

180-300

Kaba (>2mm)

Siyenit

Magmatik

19±4

2,7-2,8

1,6

0,4

170-300

Kaba

 

 

TESTING THE PROPERTIES OF MINERALS TAŞLARIN TEST EDİLMESİ

 

It is very important to define the physical and chemical properties of rocks before usage of them. So that it is determined if the rock is suitable for purpose of usage or not. For example, it should be known that if the rock that is planned to be used for concrete aggregate have alkali-silica reaction with cement. Because, in this case, the aggregate produced with this rock can not be used in concrete production and the investment for the quarry and crushing plant will be meaningless.

Once it is determined that the rock is suitable for usage, then it is necessary to define the mechanical properties. The type of the crushers and the properties of the wear and spare parts in the machines will be decided according to the mechanical properties of the rock to be crushed. Otherwise, because of wrong machine selection, the investor can face with huge economical losses. 

Since our company producec crushing and screening equipment, we will mainly focus on the properties of the rocks which are important for crushing and screening.

SOLID DENSITY :

Density of a substance is its mass per unit volume. Water is a referance point for density. Because the density of pure water is 1gr/cm3 (1 kg/liter, 1 ton/m3). The density ratio of the substances accprding to the water density is called specific gravity. The substances with specific gravity less than 1 gr/cm3 float on water where specific grav,ty is larger than 1 gr/cm3 sink. The heaviest substance on earth is mercury. The specific gravity of mercury is 13,5 gr/cm3. In other words, 1 liter of mercury weighs 13,5kh where 1 liter of water weighs 1 kg.

The solid density of rocks are usually between 2,5-3 gr/cm3. But there are very light (for example the solid density of pumicite is about 1 gr/cm3) and heavy (for example density of iron ore may exceed  5 gr/cm3)rocks are present in nature.

 

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