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• VOL 88, No. 9 (2015)

A device for determining the wettability of quartz sand has been developed. It is shown that with an increase in temperature, the surface wettability of the minerals included in the composition of glassy quartz sand increases due to a decrease in the slippage of the liquid along the solid surface and, as a consequence, the aggregate stability of their suspensions increases.

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• VOL 88, No. 4 (2015)

For deferrization of substandard sands with a mass content of 0.34% Fe2O3, a method of flotation with a steam-air mixture was used according to the scheme "in two jets": from & frac12; parts of the sand separate the foam product I of the flotation stream and mix it with another & frac12; part of the sands - with the second flotation stream. A distinctive feature of the second flotation jet is the use of a mixture of air with hot (> 100 ° C) water vapor as a gas phase, which makes it possible to obtain sands of the VS-030-B grade. The heating steam consumption when using the steam-air flotation technology is 9.7 x middot; 10 ^-4 Gcal / t of sand.