Products Center
Undensified Micro silica fume use for Refractory
Introduction
Micro silica ,also called silica fume or micro silica, is a byproduct of production silicon metal or ferrosilicon alloys. Silicon metal and alloys are produced in electric furnaces.The raw materials are quartz,coal and woodchips.The smoke that results from furnace operation is collected and sold as silica fume, silica fume consists primarily of amorphous(non-crystalline) silicon dioxide(SiO2),its average granule diameter is 0.15~0.20um,specific surface area is 15000~20000m2/kg,and it has extremely strong surface active.
Features Characteristics
1).Appearance is as grey&white off.
2).High electrical resistivity
3).Low Permeability
4).Superior resistance to chemical attack from chlorides,acids and sulfates
5).Low chloride ion diffusion
6).High reactive Pozzolan
7).High temperature strength
8).Improved stability ingeothermal environment
Application area
The early strength of concrete or special cement compound to meet the oil Well,marine oil drilling platform,harbor terminals,railway bridges highways,airport runways,tunnels and urban high-rise building projects.
Silica Fume in Refractory
1) The micro silica is as a raw material, commonly used in the refractory industry.
It plays an important role to improve monolithic refractories.
2) Microsilica is filled in those gaps of which in the traditional refractories.
Thus, it increases the bulk density and lowers the porosity, so that intensity can be
increased abviously.
3) Micro silica contains strong activity to form colloidal particles in the water, and adding suitable dispersant to enhance liquidity, thereby improving performance casting.
4) Microsilica is easy to form -Si-OH in the water and has strong hydrophilicity and
activity. It can enhance the cohesion of refractories, in the meantime, it also improves greatly the high temperature properties and extends the life of refractory products.
Test data report
| Test Item | Standard | Result | Standard | Result | Standard | Result | Standard | Result |
| SF85 | SF90 | SF94 | SF96 | |||||
| SiO2(%) | 85%min | 87.94% | 90%min | 92.21% | 2.0%max | 95.46% | 2.0%max | 97.68% |
| Fe2O3(%) | 2.0%max | 0.47% | 2.0%max | 0.57% | 2.0%max | 0.04% | 2.0%max | 0.02% |
| Al2O3(%) | 2.0%max | 0.42% | 2.0%max | 0.51% | 2.0%max | 0.27% | 2.0%max | 0.18% |
| CaO(%) | 2.0%max | 0.51% | 2.0%max | 0.64% | 2.0%max | 0.11% | 2.0%max | 0.05% |
| Na2O3(%) | 2.0%max | 0.63% | 2.0%max | 0.58% | 2.0%max | 0.41% | 2.0%max | 0.10% |
| Moisture(%) | 2.0%max | 0.50% | 2.0%max | 0.74% | 2.0%max | 0.34% | 2.0%max | 0.38% |
| Loss on Ignition(%) | 3.0%max | 2.43% | 3.0%max | 1.47% | 3.0%max | 1.42% | 3.0%max | 1.01% |
Bulk Density (Densified) | 550-700kg/m3 | 650kg/m3 | 550-700kg/m3 | 650kg/m3 | 550-700kg/m3 | 650kg/m3 | 550-700kg/m3 | 650kg/m3 |
Bulk Density (Undensified) | 300-380kg/m3 | 330kg/m3 | 300-380kg/m3 | 330kg/m3 | 300-380kg/m3 | 330kg/m3 | 300-380kg/m3 | 330kg/m3 |
Particle Size +/-0.045mm | 99.00%min | 99.67% | 99.00%min | 99.87% | 99.00%min | 99.89% | 99.00%min | 99.98% |
Capacity: 20MT into one 40 HQ
10MT into one 20 GP
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
MS.Winnie
Mobile:+86-13960289086
Tel: +86-595-22288318
Fax:+86-595-22288319
Email:sales1@winitoor.com
Site:www.winitoor.com
Welcome your inquiry about our products.
our company promises:Reasonable price,efficient production time and satisfactory after-sales services.
Facebook
Twitter
Linkedin