Silica sand, Grade : Common for Refractory Material

Main specifications of silica sand :
Silica sand commonly used specifications:0.5-1mm�1-2mm�2-4mm�4-8mm�8-16mm�16-32mm�10-20 mesh,
20-40 mesh,40-80 mesh,80-120 mesh,100-200 mesh,200 mesh,325mesh
Main classification of Silica sand
Quartz has high fire resistance,Silica sand is usually divided into:Ordinary silica sand ,Refined silica sand ,High purity silica sand ,Fused silica sand and silica powder
Refined silica sand , also known as pickling silica sand ,SiO2�99-99.5% Fe2O3�0.005%,High quality natural silica sand
High purity silica sand :SiO2�99.5-99.9% Fe2O3�0.001%�Uses the high quality natural quartz stone, mortar .
Fused silica sand:Chemical composition SiO2 99.9-99.95% Fe2O3 5PPM-25PPM max Li2O 1-2PPM max Al2O3 20-30PPM max K2O 20-25PPM max Na2O 10-20PPM max (PPM is a unit of a million).Physical properties:The appearance is colorless transparent block, particle or white powder.Relative specific gravity:2.21 ; Mohs hardness:7.0 ;The value of ph:6.0 ;
The chemical composition of silica powder is shown in the following table:
item average value PH
SiO2 75~96%
Al2O3 1.0±0.2%
Fe2O3 0.9±0.3%
MgO 0.7±0.1%
CaO 0.3±0.1%
NaO 1.3±0.2%
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