A novel method for processing of Bangladeshi zircon: Part I: Baking, and fusion with NaOH
Dry ground Bangladeshi zircon (44–53µm) is found completely inert in 6M HCl, 6M HNO3,
6M HClO4, 3M H2SO4 and 6M HCl+ 2M HNO3 during leaching at their boiling point
temperatures under reflux for 4h. In the 6M HF and 6M NaOH solution, only∼ 5% zircon is
dissolved under similar conditions. The mechanical activation of zircon with NaOH at
ambient temperature, by grinding in a ball mill for 300h, is also ineffective with only 2% Zr
(IV) dissolved. However, up to 86% zircon can be dissolved on leaching a sodium carbonate …
6M HClO4, 3M H2SO4 and 6M HCl+ 2M HNO3 during leaching at their boiling point
temperatures under reflux for 4h. In the 6M HF and 6M NaOH solution, only∼ 5% zircon is
dissolved under similar conditions. The mechanical activation of zircon with NaOH at
ambient temperature, by grinding in a ball mill for 300h, is also ineffective with only 2% Zr
(IV) dissolved. However, up to 86% zircon can be dissolved on leaching a sodium carbonate …
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