The time of fluidization in a jig can thus be controlled in such a way as to make Plunger jigs are typified by variations of the Harz Jig (Figure ) that provide. HARTZ TYPE JIG. • List item here. • List item here. • List item here. • List item here . Over 50 years, Mineral Process. Equipment Pvt. Ltd. has enabled cus-. mineral jig and Harz jig. The operating variables used to determine the effectiveness of jigging include, particle size, velocity of water and amplitude. Recovery of.
|Published (Last):||26 October 2014|
|PDF File Size:||4.3 Mb|
|ePub File Size:||19.29 Mb|
|Price:||Free* [*Free Regsitration Required]|
All the compartments receive pulsating rising current, and as a result the first compartment gives the heaviest largest grains and yarz final overflow gives the lightest.
jg This safety-spigot product ranks as overflow and may be treated with the latter or as a separate product, as preferred. This sorting-column must have the same velocity of rising current in all parts of a horizontal section across it. When this is done the bed of heavy mineral below is very hard and immovable. This is the essential feature of the method of getting hindered-settling, namely, a hindered-settling chamber above and a constriction below it, with the whole current rising up through the two.
Mineral processing technology References Investigation on Jigging.
This is in part a review paper, indicating the various steps that have been taken in developing hindered-settling apparatus, some of the standard data that have been obtained, and some of the conclusions one is led to as to the effect of it in improving concentrating-methods and machinery, and in part it brings in some unpublished work.
Essentially it consists of an open tank, filled with a fluid, with horizontal or slightly inclined jig ‘screen’ near the top upon which the particles are supported, and through which the fluid flows in alternating directions.
It has one fatal error: By putting this plane considerably lower, it is believed that this No. Gold ExtractionGravity Concentration Tags: To get the free-settling method of classifying into a practical mill form, there are four things to be provided for:. Trays 10,11 and 12, Fig.
Harz Jig Concentrators
The large quartz grain has a short vertical arrow representing gravity, and a longer horizontal arrow representing the force of the water. It yields its series of products graded from coarse to fine.
EquipmentGravity Concentration Tags: Fine free mineral is scarcely haz in the tailings of Wilfley tables treating these products.
Jigging cycles are said to consist of pulsion and suction. If you wish to download it, please recommend it to your friends in any social system. This impulse is due to the elasticity of the air, and without it the classifier could not be operated.
I was not satisfied with this first test, as its field was too small, and so I had it repeated with a very long glass tube, 6 ft.
Below some examples of jigging cycles shown: The hindered-settling inverted pulsator-classifier, Fig. Here the pulsations are given to the sand from the forward current due to the opening and closing of the cock, which revolves times a hzrz, more or less, giving about forward pulsions, with an instant of repose between the pulsions.
The inflowing jets, however, have three variations, which should be mentioned. The Wilfley table may be fed with: Hindered-settling would put into the overflow multiplier is about 3: The tailings are free from fine free mineral.
What is HARZ JIG? definition of HARZ JIG (Science Dictionary)
Similarly, the black circles represent galena with a gravity 7. To the left of this figure will be seen a diagram representing a tall glass tube of water in which grains of sand can be allowed. The tailing from one compartment passing as feed into next compartment. No pumps or elevators are needed in the ball-classifier circuit, as the jig acts as a launder.
Harz Jigs differ in principle from all those previously described, inasmuch as the particles are separated by their fall through a somewhat deeper column of water than is the case on inclined tables, while a series of blows from below, causing waves moving upwards, continually brings the particles into suspension, and allows them to drop again.
Hindered Settling Equipment & Classifier Review
We come now to the study of the effects jg improved classification upon the different machines, and we will first take up the Harz jig, and call attention to the fact that this jig has a plunger which falls and rises, and as it does so, it first sends a pulsion of water up through the grains of sand, causing the same action as the hindered-settling classifier, and, second, the water goes down through the bed of sand, sucking down into the hutch the fine grains which are lying garz the interstices of the quartz.
Why is the second- or third-spigot product of a hindered-settling classifier better feed for a plunger-jig than the second- nig third-spigot product of a free-settling classifier? The bands will not stay so far apart, but will mix a little.
The undersize of the trommel is fed to the next trommel, with holes 2. Perhaps the canvas table is the most successful, and we may say that it is possible that harx of the flotation-processes may succeed in saving this class of grain. Two lower wedge-bar screens are furnished with each jig; one with 2-millimeter openings and the other with 5-millimeter openings.
A safety- spigot mig the end just above the sieve of the sixth compartment may be used in case an excessively heavy bank forms in that compartment. The amount of water in the spigots and in the overflow is much reduced from that in the free-settling classifier. Such a computation for bulbs 4, 5, and 6 gave the results in Table V. Jiig can be handled to only an imperfect degree by the round table or by any of the film sizing-machines. All of which is as satisfactory as possible.
Jigging First-Spigot Product of Classifier. Feed for Wilfley Table: