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ترکیبات شیمیایی و خواص مکانیکی
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CONSTITUENT % WEIGHTPROPERTY TYPICAL VALUES

Silica SiO2 (Combined as Silicate)

25-35%ColorBlack, glassy

Free Silica

<0.5%Grain ShapeAngular, Multifaceted

Alumina, Al2O3

2-9%Hardness7 Moh’s

Iron Oxide as Fe0

45-55%Specific Gravity at 25°c3.5

Calcium Oxide CaO

2-9% Bulk Density at 25°c1.75 ton/m3

Magnesium Oxide MgO

1-5%PH7.0
Copper Oxide, CuO0.7% maxConductivity at 25°c4 ms/ m
Sulphates0.02%Weight raise on Ignition4%
Chlorides0.003%Moisture Content<0.1%

 
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