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Appearance | clear,round,smooth,without any impurity |
SiO2 | >67% |
CaO | >8.0% |
MgO | >2.5% |
Na2O | <14% |
Al2O3 | 0.5-2.0 |
Fe2O3 | >0.15 |
others | 2.00% |
specific gravity | 2.4-2.6g/cm3 |
bulk density | 1.5g/cm3 |
Mohs hardness | 6-7mohs |
HRC | 48-52 |
Roundness | >80% |
BS6008A Sieve Analysis | BS6008B Sieve Analysis | |||||
Diameter (μm) | Standard Retain (%) | Diameter (μm) | Standard Retain (%) | |||
>1180 | 0-3 | >850 | 0-5 | |||
1180--850 | 5--20 | 600--850 | 5--20 | |||
850--425 | 65--95 | 300--600 | 30--75 | |||
<425 | 0--10 | 180--300 | 10--30 | |||
<180 | 0--15 | |||||















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