| 摘要 |
A process for upgrading an inferior grade of zircon to a superior grade thereof grade thereof includes mixing the inferior grade of zircon, in comminuted form, with at least one mineralizer, to obtain a zircon/mineralizer mixture, which is calcined product. The calcined product is washed, and thereafter, in a communication step, the washed calcined product is comminuted to obtain a superior grade of zircon which is suitable for use as a glaze opacifier.
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