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Insulation Cenosphere, Cenospheres From Coal Fly Ash
- Oct 12, 2017 -

Insulation Cenosphere, Cenospheres From Coal Fly Ash Basic Info

  • Model NO.: fly ash

  • Feature: Long Time Materials

  • Shape: Ball

  • Appearance: Fine Powder

  • Grade Standard: Industrial Grade

  • Microspheres Origin: China

  • Refractoriness (℃): 1580< Refractoriness< 1770

  • Type: Refractory Material

  • Microspheres Material: Alumina Block

  • Application: Auxiliary and Filler

  • Microspheres Color: White or Gray

  • Specification: SGS

  • HS Code: 2621900090

Insulation Cenosphere, Cenospheres From Coal Fly Ash Product Description

Insulation Cenosphere, Cenospheres From Coal Fly Ash Specifications
Refractory cenosphere
1. Size: -300micron 98%min
2. Floating Rate: 95%min
3. Bulk Density: 0.33-0.45g/cc(typically 0.38g/cc)
Insulation Hollow microsphere/ floater/ Cenospheres from coal fly ash

Hollow microsphere is one kind of coal ash hollow ball which can floating on the water. Pale color, thin-walled hollow, very light weight. The volume weight range from 250 to 450 kg/m3, Particle size is about 0.1 mm. Its Surface closed and smooth, Thermal conductivity small, refractory degree equial or greager than 1700° C, is excellent insulation refractory materials, widely used in light pouring material production and oil drilling and many other aspects.

The major chemical compositions of Hollow microsphere are silica and the aluminum oxide based, It has the functions of fine particles, hollow, light weight, high strength, wear-resistant, thermal insulation, fire-retardant insulation and many other features.

composition SiO2 Al2O3 Fe2O3 SO3 CaO MgO K2 Na2O
Content (%) 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

Insulation Cenosphere, Cenospheres From Coal Fly Ash physical performance of hollow microsphere

item Test Metric    
shape high flow spherical power grain diameter (um) 10-400
color shallow gray specific resistance  ( Ω.CM ) 1010-1013
actual density 0.5-0.8 Moh's hardness 6-7
bulk density (g/cm 3 ) 0.3-0.5 PH value 6
refractoriness  °C 1750 melting point ( °C ) ≥1400
thermal diffusivity (m 2 /h) 0.000903-0.0015 thermal conductivity (w/m@k) 0.054-0.095
compression strength (Mpa) ≥350 refractive index 1.54
Burning loss rate 1 . 33 oil absorption rate (g(oil)/g) 0.68-0.69

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