Item | SiO2 | MgO | Whiteness |
First Grade H | 60%min | 30% min | 90%min |
Second Grade H | 57%min | 30%min | 90%min |
Third Grade H | 52% min | 30%min | 87% min |
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Mail:grc@grand-resources.com.cn
Address:Beijing Office Rm.1810 Golden Land Building.No.32 Liang Ma Qiao Road. Chaoyang District,Beijing 100016 China
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