New York Paper - The Macquisten Tube Flotation Process

Solid bodies mill float in a liquid by reason of lower specific gravity, or of peculiar form, or of repellent action towards the liquid which prevents them from overcoming the resistance of its surface-tension. To the last of these causes the flotation of ores is to be ascribed. Nearly all ores and gangues are specifically heavier than water, yet they do not behave alike in this respect, and they may be divided into two classes, those of floatable and non-floatable minerals respectively. Upon a close examination of these two groups of minerals we find that those particles that will float on the surface of