| 摘要 |
Aqueous grinding compositions comprising particulate solid and hydroxy-carboxylic acids of five to six carbon atoms containing at least three hydroxyl groups and from one to two carboxyl groups or their soluble salts as grinding aids. Processes of wet grinding employing said grinding aids and processes of metal recovery employing grinding and froth flotation. The grinding aids can be added as such or formed in situ by the oxidation of saccharides.
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