composition

SiO2

Al2O3

Fe2O3

SO3

CaO

MgO

K2

Na2O

Content (%)

****2

****8

**4

0.**0.2

0.**0.4

0.**1.2

0.**1.1

0.**0.9

item

Test Metric

 

 

shape

high flow spherical power

grain diameter (um)

*****0

color

shallow gray

specific resistance(Ω.CM)

********3

actual density

0.**0.8

Moh’s hardness

**7

bulk density (g/cm3)

0.**0.5

PH value

6

refractoriness°C

***0

melting point (°C)

≥***0

thermal diffusivity (m2/h)

0.*******0.***5

thermal conductivity (w/m·k)

0.****0.**5

compression strength (Mpa)

≥**0

refractive index

1.*4

Burning loss rate

1.*3

oil absorption rate (g(oil)/g)

0.***0.*9