General Description 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.
Typical properties
Type:Silica Powder
Application: Refractory
Grade :Silica Oxide Micro Fine -400

Analytical data
| Chemical &Physical Analysis | ASTM C1240-11 | EN 13263:2005 |
| / | Spec. Frequency | Spec. Frequency |
| SiO2 (%) | >92.0 300MT | >92.0 Weekly |
| So3 (%) | / | <3.0 Weekly |
| Cl (%) | / | <0.3 Weekly |
| Free CaO (%) | / | <1.0 Weekly |
| Free Si (%) | / | <0.4 Monthly |
| Alkalies(as equivalent Na2O %) | Report 300MT | / |
| Moisture(%) | <1.0 300MT | / |
| Loss on Ignition,LOI(%) | <4.0 300MT | <4.0 Weekly |
| Specific surface(BET -M2 /GRAM) | >18 2200MT/3 months | 15-35 Monthly |
| Bulk density(kg/m3) | >300 | 320 |
| Pozz.Activity Index(%) - 7 days accelerated curing | >110 2200MT/3 months | / |
| Pozz.Activity Index(%) - 28 days accelerated curing | / | >100 Monthly |
| Retained on 45 micron sieve (%) | <10 3 00MT | |
| Variation from avg.retained on 45 micron (%) | <2 avg.of last 10 tests | |
| Density(kg/m3) | Report 300MT |
Applications
Micro-Silica Powder Is Widely Used In Various Applications, Including High-Strength Concrete, Amorphous Refractory Materials, Dry-Mix (Ready-Mix) Mortars, High-Strength Non-Shrink Grouting Materials, Wear-Resistant Industrial Floors, Repair Mortars, Polymer Mortars, Thermal Insulation Mortars, Impermeable Concrete, Self-Leveling Concrete, Concrete Compaction Agents, Concrete Preservatives, And Cement-Based Polymer Waterproofing Agents. Additionally, It Is Utilized For Reinforcing Rubber, Plastic, Unsaturated Polyester, Paints, Coatings, And Other Polymer Materials, As Well As For Modifying Ceramic Products.
Packaging 25kg/bag
Storage to be stored in plastic or stainless steel container,please store dry at usual ambient temperature and protect from excessive heat(below 40℃)
Shelflife 2 year
Transport regulation not handle with care to avoide breakage when moving,keep from excessive heat.this product is non-toxic,non-irritating,non-combustible.
Phone: +86 543-3324448
Tel: +86 543-3324448
Email: chengli@chenglicn.com
Add: 137-7# Yongxin Rd,Bincheng District,Binzhou City Shandong Province,China