mineral jig

Jigging Separation Process Principle

The Mineral Jig is not just another gravity Separation Process. It is a highly efficient selective pulsator and concentrating machine which has the ability to treat an unclassified feed separating solids having only a slight differential in settling rates, with only a minimum addition of water.

1000s of these Mineral Jigging machines are now in operation on a “24-hour per day” basis and they are successfully used on practically every type of ore ranging from massive sulphide to others low in mineral ratio, and some which are completely oxidized. Both metallic and non-metallic ores are being handled, with equal efficiency.

The principle behind the success of the Mineral Jig focuses around its adaptability to a wide range of problems under varying operating conditions large capacity, minimum water requirements, extreme selectivity, foolproof jigging operation.

Jigging Minerals and Gold

Working Principle for Effective Jigging

https://www.911metallurgist.com/equipment/gravity/jigs/small-mineral-jig/

The Mineral Jig operates on the basic principle of hindered settling, and in order to effect a concentration it is necessary that there be a differential in the settling rate of the solids treated. As there is an accumulated differential in settling rates in the grinding mill discharge ….Read more

Harz Jig Concentrators

Harz Type Jig

The (Improved Harz Type) Jig is essentially a coarse – mineral Jig Concentrator embodying improvements on the Harz Jig and the Ellis Jig. It will handle successfully all types of ores which can be treated by gravity concentration with feed size ranging from ¼” to 1½”.

These jigs are made in three sizes and with one to six compartments subdivided by a shallow partition into a screen compartment and a plunger compartment. Reciprocation of the plunger causes flow of water through the screen. The coarse and heaviest particles settle onto the screen and are removed by a side drawoff. The heavy fine particles pass through openings in screen into hopper-shaped hutch, from which they are discharged intermittently or continuously. The light particles pass into next compartment where currents are of lower velocity.

Standard construction is tanks and frames made of kiln-dried Douglas fir and laminated wood plungers. Iron work consists of necessary tie rods, eccentrics, plunger rods, screens, concentrate draw offs, shafting and bearings. Tanks may be welded steel plate. Jig may have belt or motor drive.
Additional data gladly furnished upon request.

Improved Harz Type Jig

Jig Concentrator Capacity

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Easy Mill Expension: Grind Less, Float Coarse, at Higher Tonnage

The Problem with Coarse Flotation and Recovery

Many flotation plants today are grinding to fine sizes. This means that money is being spent grinding worthless gangue which might be discarded at a coarser mesh. Many plants are treating ores in which the gangue is free at a coarse mesh and where a coarse bulk concentrate is economical. If the plant is using a flotation machine which can handle a coarse product such as the “Sub-A,” a slight change in the flowsheet may increase tonnage, improve recovery and lower grinding and reagent costs.

Flexibility, so important in the plant flowsheet, is also of utmost importance within the flotation machine itself. The ability to handle either a coarse or a fine mineral with no changes in equipment and with only minor changes in the flowsheet is one of the prerequisites of good concentrating equipment.

Flowsheets for Coarse and Fine Flotation

THE PROCESS FLOWSHEETS

Fine Flotation Circuit, 60 Tons/day

At the left in the flowsheets above is shown a conventional one-mineral or bulk separation using a classifier and a jig in closed circuit with the ball mill. This flowsheet was designed to handle a product at approximately 60 mesh.

Fine flotation flowsheets are ….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 constant throughout the experiments. Three products were made, concentrates from the first three hutches, middlings from the fourth and fifth, and tailing from the sixth. The middlings were crushed in one pair of Allis-Chalmers Style B, 30 by 14-in. rolls, and elevated with the original ore to the 2-mm. screens, oversize of which formed the jig feed.

While this arrangement was very simple, it gave rise to undesirable crowding of the circuit. Table 1 shows tonnage and assay values of the jig feed and products at the beginning of the experiments, and brings out the excessively large amount of middlings, comprising 63.3 per cent, of the total material fed to the jig. The rolls, being heavily overloaded, did very little crushing, a screen crushed fine enough to pass to the tables. The remaining 347 tons returned to the jig with 400 tons of original ore. ….Read more

Gold Jig & Mineral Processing Jigs

gold mineral jig working principle http://is.gd/RZpPXu

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 of its continuously varying hydrodynamics. The mineral bed is repeatedly moved up by the water, expands, and then re-settles, the resettlement occurring with the water flowing down at a lower rate (because of the addition of hutch water) than that which occurred on the upstroke. It follows that the waveform itself must be a significant parameter. The manner in which the bed expands is also important because of its marked effect on the particle dynamics. A number of experimental studies are reported in the literature but too often they fail to contribute to the understanding of gold jigging. This conflicting information appears to arise because many studies were carried out on a narrow set of ideal conditions that resulted in behaviour quite unlike that associated with practical gold jigs.

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Gold Jig DIY Plans Hand Operated

https://www.911metallurgist.com/equipment/gravity/jigs/small-mineral-jig/

Hand operated jig

For for Coarse Gold Recovery (>2mm), here is an easy to build hand-operated mineral jig.  This jig can be used for batch ‘jigging out’ gold from oversize (>10 mesh) from pre-sluicing or panning rejects as occasionally there will be coarse nuggets present in the oversize rock and this can-be-homemade jig works as a simple hand operated device especially developed to recover these nuggets.

Such a small gold jig is operated in batch campaigns, accepting the batches of oversize from the operation of your sluice for example. Once several of these batches have been passed through the jig, the jig basket is harvested and upturned to reveal any nuggets for easy hand picking.

I think plans could easily be made explaining for how to build a gold jig like this.  Since it have no motors or complexity to it.

pan american placer jigs Industrial Production Jigs

A DIY jig is a valuable gold prospecting tool not only recover more gold, but for exploration as it is capable of indicating quickly and efficiently the presence of coarser nuggets.  The more ….Read more

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