Quartz use in Silicon carbide and other abrasives
Silica sand and quartz are used in the manufacture of silicon carbide grains. The sand should for this purpose contain more than 99% SiO2, less than 0.1% each of Fe2O3 and Al2O3, no lime, magnesia and phosphorous. Similarly, quartz should contain 99.50 - 99.75% SiO2, 0.04 - 0.05% Al2O3, 0.05 - 0.10% Fe2O3, 1.10% CaO and MgO.
Our Quartz (Silica) Specifications
high content of SiO2 99.6% and above.
Sizes: from 0.08mm to 8.0mm and also 38 microns
Fe2O3 content: 0.002% or 0.008%
Al2O3: nil or maximum upto .005%
Quartz specifications suitable for sand paper / cloth
For making this quartz (flint) should have high silica (99%) and low iron content as far as possible.
Another abrasive use of silica sand is sand blasting where by sand is fired under pressure usually in the presence of water to suppress the dust against the material to be polished. For this purpose the chemical composition of the sand is relatively unimportant but size frequency distribution and the absence of clay clogging materials are very important.
Speification of Quartz granules:
Sio2 above 99.6% and above
Fe2O3: Should be around 0.002-0.008%
Other trace elements: should be below 0.1%
No trace elements or contimination like clay, sand etc
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