Undensified Silica fume Grade 95

详情

1. What is silica fume

Silica Fume, also named micro silica, which it is made from the oxidized silicon vapor of silicon iron or element silicon with special dust catcher and final turn out amorphous SiO2 powder.

Average particle size of silica fum is around 0.*5~0.*0μm, specific area is ****0~****0m 2 /kg, and they are with Strong surface activity.
The main element of silica fume is amorphous SiO2. Besides, the burner gas accompanies impurity. Like dissociate C, Fe2O3、CaO、K2O、Na2O and etc. The silica fume Color along with the higher content of C、Fe2O3, the deeper color is changed from White-Grey White-Grey-Deep Grey.
By directly collected silica fume from burner is named Original silica fume. The bulk density is around **0~**0kg/m3.
But for the convenience transportation and application, the Original silica fume can be increased bulk density.

2. Undensified Silica Fume Main Features:

1) High Electrical Resistivity.

2) Low Permeability.

3) High Reactive Pozzolan.

4) High Temperature Strength.

5) Low chloride ion diffusion.

3. Undensified Silica Fume Specification
SiO2 content: *5%min
Moisture: 1.5
LOI: 1.*4
Bulk Density: ******0kg/m3
Fe2O3: 0.*4%
Al2O3: 0.*4%
CaO: 0.*8%
Na2O + K2O: 0.3%

4. Undensified Silica Fume Advantages:
 

China Bemsun Silica Fume in refractory is a highly effective pozzolanic material, the functions of adding microsilica are as follow:
 

Enhancing the fluid of pouring refractory.

Reducing the volume of used water.

Be easy to shape.

Raising the production efficiency.

Rising the compact and intensity of refractory.

Enhance elevated temperature strength and thermal shock of refractory.