| Description |
iv, 18 leaves : illustrations, 3 photographs. |
| Summary |
"Copper sulphate is a common flotation reagent for blende ores. Metallic iron is also present in the mill circuit and a reaction between the iron and the salt would be in accord with well known chemistry. The abundance of metallic iron in a flotation feed may be noted by the examination of any feed. It originates, first of all, in the mine, then the coarse crushing machines contribute their share, and finally the fine grinding medium is a large contributor. If the grinding is with cast iron balls in amount of metallics is greater than when steel is used. In the end much more metallic iron is present than would be indicated by noting the ball consumption. An estimate that the total amount of metallics is twice that supplied by the balls and liners might not be far amiss. It is well known that copper sulphate plates cut on iron in an acid solution, but since flotation is common in solutions where acid has not been added this reaction has not been given due thought"--Introduction, leaf 1. |
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