Grey Undensified Microsilica 96% 360Kg/M3 For Refractory
96% Undensified Microsilica for High Performance Concrete, High-grade Refractory, Baffle, Silicon Carbide Cover Plate
1. Micro Silica Fume Introduction
96% undensified microsilica is the standard high quality grade offered to the refractory industry. It is globally available either as densified or undensified. It is a versatile quality for use in advanced refractory products such as low and ultra-low cement castables. The colour is light grey with a low amount of impurities.
96% undensified Microsilica is manufactured on a campaign basis. It is particularly suited as a cost-effective alternative for low-cement castables. The colour is light grey, with a control- led and stable chemical composition.
2. Specifications
|
Analysis |
Result |
||||
|
SF85 |
SF88 |
SF90 |
SF92 |
SF94 |
|
|
SiO2(%) |
86.11 |
88.52 |
91.53 |
93.66 |
96.97 |
|
Fe2O3(%) |
0.7 |
0.65 |
0.35 |
0.2 |
0.2 |
|
Al2O3(%) |
0.38 |
0.26 |
0.22 |
0.2 |
0.2 |
|
CaO+MgO(%) |
0.4 |
0.36 |
0.36 |
0.3 |
0.3 |
|
K2O+Na2O(%) |
0.3 |
0.28 |
0.2 |
0.2 |
0.2 |
|
Moisture(%) |
1.77 |
1.66 |
1.66 |
0.82 |
0.91 |
|
Loss on lgnition(L.O.I)@975℃ (%) |
3.6 |
2.92 |
2.07 |
1.92 |
1.91 |
3. General Characteristics
● Microsilica grade 96 is produced purposely as a separate product, aimed for stable properties and very low impu- rity levels. Our 96% Undensified microsilica is also produced with special attention towards microsilica quality.
● The high purity 96% undensified silica fume makes it particularly suitable for its use in refractory applications. The low content of carbon (giving the light colour) ensures good flowability of the castable. The amount of alkalies is also very low, preventing softening at high temperatures.
● Another important characteristic is stable pH-values, giving castables with regular and predictable setting properties.
4. Package
25kg/plastic bag, 950kg/jumbo bag,1000kg/jumbo bag.
5. Applications
96% Undensified Microsilica for Refractory
The use of silica fume in refractory castables provides better particle packing. It allows for less water to be used while maintaining the same flow characteristics. It also promotes low temperature sintering and the formation of mullite in the matrix of the castable. This produces a castable that has a low permeability to avoid gas, slag and metal penetration. Castables incorporating silica fume are stronger than non-silica fume containing castables especially at high temperatures with higher density they attain lower porosity and are more volume stable.
Advantages Of adding Silica Fume ( Microsilica ) In Refractory
● Silica fume in refractory is used in unshaped refactories
● Silica Fume in refractory is used ingunned refractory materials to improves adhesion in castables and minimizes rebound
● Silica fume in refractory is used in shape refractorie
● Very low permeability to chloride and water intrusion.
● Extremely high electrical resistivity (20 to 100 times greater than ordinary concrete).
● Increased abrasion resistance on decks, floors, overlays and marine structures.
● Superior resistance to chemical attack from chlorides, acids, nitrates and sulfates.
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