History of Ore Dressing Equipment

Before theappearence of heavy ore dressing machinery, the raw ore was widely broken up byusing hammers, and the process method was called "spalling". Beforelong, mechanical ore dressing methods were applied to achieve this. Forexample, stamp mills were used in Samarkandas early as 973. They were also used in medievalPersia. By the 11th century, stampmills were in wide use all over the medieval Islamic world, from Islamic Spainand North Africa in the west to Central Asiain the east. A later example was the Cornish stamps which consist of a seriesof iron hammers mounted in a vertical frame, lifted by cams on the shaft of awaterwheel and falling on to the ore under gravity.
The simplest ore dressing method of separating ore from gangue consists ofpicking out the individual crystals of each. This is a very dull process,particularly when the individual particles are small. Another comparativelysimple 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 willbe carried further by water stream. The process of beneficiation for gold usesboth of these ore dressing processes. Various equipment known as 'buddles' wereused to take advantage of this feature. Later, more advanced ore dressingmachines were invented such as the Frue vanner, developed in 1874.
Other ore dressing equipment used historically includes the hutch, a troughused with some ore dressing devices and the keeve or kieve, a large tub usedfor different ore dressing settlement.
Forui has developed a variety of ore dressing equiptment, jig machine is one of them. Forui JigMachine can be used as a dedicated ore dressing equipment for the iron, gold,tin, manganese, barite, scheelite and other ore dressing.

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