Dowsett Density Valve

Dowsett Density Valve is a simple, automatic control for discharging hutch concentrate from the (Selective) Mineral Jig. By its use, concentrate is automatically discharged in predetermined quantities at high density, eliminating risk of inattention by manual labor. Where a rougher-cleaner jig combination is used, this valve makes an ideal device for feeding the secondary machine. … Read more

Small & Laboratory Jigs

Laboratory Jig (Harz Type) There are many ores, such as zinc, lead, iron, and fluorspar which can be treated economically in jigs handling very coarse feeds; either to make a high grade concentrate or to discard a coarse, clean tailing. The small (Harz Type) Laboratory Jig accurately tests the possibilities of such an ore. The … Read more

Mineral Jigs for Concentration of Lead Ores

The following notes are taken from results obtained on a standard 25-ft. Hancock jig tested during regular operation. The object of the tests was to determine the conditions for most effective work, and the nature of products that could be made. The material treated was sized between 9-mm. and 2-mm. round- hole screens, and was … Read more

Gold Jig & Mineral Processing Jigs

The Gold Jig or Mineral Jigs are important of all types of alluvial gold concentrating device among all gravity separation methods; they are also the most complex and the practice of jigging in mineral processing is often viewed as an art rather than a science. Gold jigging has been referred to as being probably the most complex gravity operation because … Read more