cement additive refractory application ball shape hollow microspheres

definition

We mainly produce lightweight cenosphere. It is also called hollow microspheres. 

They’re extracted from fly ash of the thermal power plants and main chemical 

composition is aluminium silicate. They’re lightweight greywhite hollow 

microspheres in closed and smooth surface.

Main chemical

composition  

%

SiO2

Al2O3

Fe2O3

SO3

CaO

MgO

K2O

Na2O

56-62

33-38

2-4

0.1-0.2

0.2-0.4

0.8-1.2

0.5-1.1

0.3-0.9

specification

20mesh,40mesh,60mesh

feature

High fire resistance, high hardness, high strength, fine granularity, large

specific area, good electric insulation and sound insulation, 

excellent flowability, lower cost

application

Application field

use

Refractory & 

thermal

insulation

Refractory brick, pipe insulation shell, casting insulating

riser, lightweight insulating abrasion resistant glass steel 

etc.

construction

Building decoration, road construction, waterproof 

and thermal insulation coating for the roofing etc.

Oil industry

Oil well cementing, pipeline anticorrision & thermal

insulation, offshore oilfield, flotation gear, reducing 

agent for oil drilling mud, oil & gas transmission pipeline 

Insulation 

material

Plastic activation filling agent, high temperature & 

high pressure insulator etc.

Coating

industry

Paintings, printing ink, adhesion agent, insulating paint,

anti-corrosion paint, high temperature resistant & 

fireproof painting, wall coating etc.

packing

20kg/bag or as requested

item

index

color

Grey-white color

True density

0.7-0.95

Bulk density

0.3-0.45g/CM3

Mohs hardness

6-7

Refractoriness

1580-1770°C

Specific resistance

1010-1013Ω.CM

Melting point

≥1400°C

Coefficient of temperature conductivity

0.000903-0.0015M2/h

Thermal conductivity

0.054-0.095w/m.k

Compression strength

≥350Mpa

Refractive index

1.54

PH value(water dispersion system)

6

Loss on ignition

<1.0

Oil adsorption

0.68-0.69