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Gold Miners Find Rich Pickings In Old Tailings (NZ) | Gold ...

Oct 21, 2017· If there was no one within 100 klms of the Arrow river and no helicopters flying overhead, and I could do what I liked, and use any mining equipment I liked, I could go to the Arrow river tomorrow and get 50 ounces in a week or two (my means of mining would be a 7-inch dredge, but I would have to use at least a 6-inch dredge).

metal detecting old tailing piles - Gold Prospectors ...

The old Yuba dredge piles can be good hunting.....most had screens in the trommels ranging from 5/8 to 3/4 inch holes....anything bigger went on through the trommel and on the stacker belt and got dumped. ... You know there's got to be a lot of gold left in those tailings. Paul . ARTHUR WAUGH Buzzard Posts:740. 09 Sep 2015 12:22 PM: There is an ...

Reprocessing Gold Tailings by Gravity Methods

Tailings originating from the gravity concentration of a gold ore containing about 14 g/t Au have been treated by various beneficiation methods. These tailings have been screened on the 147 and 74 micron sieves and the two coarsest fractions have been separated on shaking tables with unsatisfactory results, but the concentrates have been examined in polished sections for mineragraphic analysis ...

Dredge Tailings Disposal

In dredging, as in hydraulic mining, the disposal of tailings is frequently a source of considerable difficulty. The method of discharging debris at each side of the dredge is unsuitable for working shingly river-beds. In such rivers the material often contains from 60 to 70 per cent, of stones and coarse gravel, and this quantity, discharged overboard on either side, speedily hampers all ...

Mining Waste Management: Reprocessing Tailings

Also working on a gold tailings retreatment project in South Africa. The project intends to retreat old tailings at a rate of one million tonnes per month and aims to recover about 688,000 ounces of gold from the combined tailings deposits over the life of the project. Metals X Limited

Researching Evidence of Past Mining to Locate Gold Deposits

Gold can still be found in dredge tailing, hydraulic pits, lode mines, and drywasher waste piles. Understanding how past areas were mined by the early gold miners can help you decide which areas are most likely to produce gold today. Locating these areas can be a great way to search for placer gold …

Suction Dredge Tailings Piles Can Contain Good Gold - Gold ...

Feb 08, 2015· This was an eye opener. Indiana gold dredge tailings piles reworked via panning contained good gold. Dennis tip was to watch for where the dredgers are running their machines with really fast water flow, then pan their tailings piles. He gets quite a few pickers. I …

Forgotten Gold – Searching Abandoned Mines and Tailings

"Tailings" are the discarded pieces of rock left from previous mining activities. Again, many valuable remnants of gold were cast aside. Old-time miners were looking for the obvious pay dirt, but today's prospectors have the equipment to locate even tiny pieces of gold. A minuscule looking 2 grams of gold is worth $100 at today's gold ...

Bucket Line Dredges: Literally Tons of Gold Unearthed ...

Jun 23, 2016· Gold Missed by the Dredges . The different bucket line dredges were all set up differently, and some were more efficient than others. They certainly missed some gold, and you can still prospect in the old dredge tailings that were left behind and find gold in them today.

How do I "read" old mine tailings? - THunting.com

The serpentine tailings are most likely dredge tailings following a creek bed. They simply dug up the bed of the creek and fed it into a big classifier. The tailings were deposited using a boom arm belt feed which could swing to allow clearance for the pile.

From Tailings to Treasure? Miners Make Money Reprocessing ...

DRD Gold, one of the first South African companies to abandon traditional mining to focus on extracting gold from tailings. New technology allows it to recover up to 40% of the gold left in particle form in tailings. DRD Gold extracted 33,600 ounces of gold, worth nearly US$40 million, in …

Re-Processing Gold Tailings in South Africa

The technical and economic feasibility or re-processing hundreds of millions of tons of tailings in a number of historic gold tailings dams in the Witwatersrand area of South Africa is being investigated. The objective is to recover uranium and residual gold from the tailings, as well as to oxidize the sulphides to eliminate long term

Mine Tailings Dredges & Mine Tailing Dredging Equipment ...

In many cases, these byproducts commonly referred to as "fines" or "tailings" have high value (ex. gold tailings or coal fines) and can be mined again with a hydraulic mine tailings dredging system and pumped to a dewatering or separation plant for reprocessing. IMS Versi-Dredge for Mine Tailings …

Metal detecting old dredge tailing piles - GOLD ...

Dec 07, 2009· I was recently reading about metal detecting in old dredge tailing piles.People say that a good amount of gold got past the classifiers and ended up inthe waste piles. Theres a number of people that find decent nuggets in thesepiles.So theres a place I know where there are some huge tailing piles...

Reprocessing of Mining Tailings (Gold ... - Ellicott Dredges

Sep 11, 2014· The dredge was used to extract material at depths of up to 8m and pump them as slurry a distance between 500m and 800m and a terminal elevation of 11m. The slurry is pumped using a 10-inch HDPE pipe. The dredge generates and pumps slurry with a 28% density. The tailings have a material Specific Gravity of 2.69 and a wet bulk density of 1.71t/m3.

Mine Tailings, Tailings in Mining, Gold Tailings ...

In 2002, before the construction of new tailings pool, the gold tailings in the old tailings pool was over 900 thousand ton. The gold content was about 1,665kg, while silver content was about 25t. Xinhai practice tailings re-processing line in pulp-in-carbon factory, capacity was 300t/d, recycled gold and silver by using Gold CIP Production Line.

Colorado,fairplay area - Gold Prospectors Association of ...

Panned and sluiced the beach once a couple years ago when it was still $5. Wasn't worth it at $5 so definitely not worth it now. I guess there is an RV park close to there that allows you to pan old dredge tailings if you ask them. Never tried it but heard wasn't too bad. Dan

Tailings remediation with dredge mining technology

Aug 24, 2015· In dredge mining, excavation, slurrification and collection (suction) of tailings occurs simultaneously, making dredging a suitable solution, with wide applications in tailings remediation projects. Different case studies in Chile and Brazil are discussed in this article to illustrate this.

Gold Tailings Reprocessing Technology - Xinhai

【Case】 1. A gold processing plant in Inner Mongolia has a history of nearly forty years, which is a classical old processing plant. Before the new tailings pond construction completed in 2002, there are 90000 tons of tailings with recoverable tailing with high gold content in the old tailings pond.

More on Tailing Piles and Old Workings - GOLD NUGGET ...

Oct 05, 2010· Specimen gold or gold still in the host rock comes in many forms and I have found some very impressive crystalline gold on quartz over the years in the old throw away piles or dumps. In the old days ore was sorted by hand and if you couldn't see gold you threw it away, but often there was gold within the rock that was not visible.

Prospecting Gold Tailing Piles with a Metal Detector

For us modern gold prospectors, this is a very exciting thought! There are dredge tailing all across the west that contain some HUGE nuggets and specimens that are still waiting to be unearthed. This is not theory, this is a fact. Some seriously nice nuggets are being found every year in these old dredge tailings.

MORE ON TAILINGS - Nugget Shooter

MORE ON TAILINGS by W Southern Jr. - 2003. ... Dredge Tailings. ... Specimen gold or gold still in the host rock comes in many forms and I have found some very impressive crystalline gold on quartz over the years in the old throw away piles or dumps. In the old days ore was sorted by hand and if you couldn't see gold you threw it away, but ...