History of Ore Dressing Equipment

Before the appearence of heavy ore dressing machinery, the raw ore was widely broken up by using hammers, and the process method was called "spalling". Before long, mechanical ore dressing methods were applied to achieve this. For example, stamp mills were used in Samarkand as early as 973. They were also used in medieval Persia. By the 11th century, stamp mills were in wide use all over the medieval Islamic world, from Islamic Spain and North Africa in the west to Central Asia in the east. A later example was the Cornish stamps which consist of a series of iron hammers mounted in a vertical frame, lifted by cams on the shaft of a waterwheel and falling on to the ore under gravity.
The simplest ore dressing method of separating ore from gangue consists of picking out the individual crystals of each. This is a very dull process, particularly when the individual particles are small. Another comparatively simple method relies on the various minerals having different densities, causing them to collect in different places: metallic minerals (being heavier) will drop out of suspension more quickly than lighter ore materials, which will be carried further by water stream. The process of beneficiation for gold uses both of these ore dressing processes. Various equipment known as 'buddles' were used to take advantage of this feature. Later, more advanced ore dressing machines were invented such as the Frue vanner, developed in 1874.
Other ore dressing equipment used historically includes the hutch, a trough used with some ore dressing devices and the keeve or kieve, a large tub used for different ore dressing settlement.
Forui has developed a variety of ore dressing equiptment, jig machine is one of them. Forui Jig Machine can be used as a dedicated ore dressing equipment for the iron, gold, tin, manganese, barite, scheelite and other ore dressing.