In the US the most common equipment applied in sand washing operations are classifying tanks and sand screws. If you are currently operating a sand screw or a classifying tank for your sand washing operations then there are a number of issues that you will be familiar with.
How The Screw Sand Washing Works Heat Treatment of Steel Zianet. The sand bath is used for tempering certain classes of work. a thermometer, which does not indicate the actual temperature of the sand, but a somewhat 430 to 435, Hollow mills (solid type) for roughing on automatic screw machine work.