| 摘要 |
The process comprises the sequential steps of classifying and selecting from gold-bearing siliceous material that fine material which passes a preselected screen, heating or roasting the selected material to a predetermined temperature, dry-air-float concentrating the material, and separating the material by wet-float slurry means. In practice, it has been found that the steps of heating and dry-air-float concentrating of the material may be performed concurrently.
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