white silica powder,nature silica powder - hnhy

Technics
Silica powder is the by-product of ferrosilicon or silicon metals the high-purity quartz, coke and scrap iron in the furnace.
Introduction
Silica powder is also called silicon ash or condensed silica fume, or silica fume. It is the by-product of the process of ferrosilicon or silicon metal which is made up of the high-purity quartz coke and scrap iron in the furnace. The main component of the silica powder is SiO2. The color of the silica fume is grey.

Application
1. The tiny silica powder as good modified material of concrete, can be used in the construction Tiny silica powder high-strength concrete has many characteristics such as easily to pour, long-term keep stability and higher strength ect. And it can improve the inner quality of the building ,so it has great application value to use in the construction of bridges, water conservancy and metro ect.

2. The silica powder used in the refractory can improve the liquidity and density largely enhance the strength of high temperature and shock performance obviously and the production efficiency can be greatly advanced Currently the silica powder are widely spread in the fused and sintering refractory material besides the pouring materials.

Product Parameters
Item A B C
SF95 SF93 SF90 SF88 SF85 SF80 SF70
SiO2,%≥ 96.0 93.0 90.0 88.0 85.0 80.0 70.0
Al2O3, %≤ 1.0 1.0 1.5 - - - -
Fe2O3, %≤ 1.0 1.0 2.0 - - - -
CaO+MgO, %≤ 1.0 1.5 2.0 - - - -
K2O+Na2O, %≤ 1.0 1.5 2.0 - - - -
C, %≤ 1.0 2.0 2.0 2.5 - - -
Loss on ignition,LOI, %≤ 1.0 3.0 3.0 4.0 - - -
PH value 4.5-6.5 4.5-7.5 4.5-7.5 4.5-8.5 - - -
Retained on 45 micro sieve ,%≤ 3.0 3.0 5.0 8.0 - - -
Specific surface (BET-m/gram) ≥ 15 - - -
Moisture, %≤ 1.0 2.0 2.5 3.0 3.0 3.0 3.0
Bulk specific gravity,( kg/m3) ≤ 700 700 700 700 700 700 700