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Monday, July 27, 2020 | History

3 edition of Detecting and Sorting Disseminated Native Copper Ores. found in the catalog.

Detecting and Sorting Disseminated Native Copper Ores.

United States. Bureau of Mines.

Detecting and Sorting Disseminated Native Copper Ores.

by United States. Bureau of Mines.

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  • 2 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 7904
ContributionsMiller, V., Nash, R., Schwaneke, A.
ID Numbers
Open LibraryOL21739540M

A 5-ft. advance of an 8-in. (20 cm.) hole cuts out about lb. ( kg.) of ordinary disseminated ore. If this ore assays per cent, copper, and if 5 lb. ( kg.) of 5 per cent, ore are shaken down from crevices in the walls of the hole, salting the sample, the resulting assay would be per cent. Copper ores can be divided into three groups corresponding to the ease of chemical reduction to the metallic state. The groups are naturally oc-curring metallic copper, "oxidized type" ore, and "reduced type" ore. Occurrences of native copper metal are known from numerous New and Old World localities. In general it is safe to assume that the.

Types of copper ore: Oxides. As mentioned, copper oxide ores are not as attractive an exploration target as copper sulfide ores due to their lower grade. However, in some cases low-grade copper. A burgeoning mining industry stimulated early growth in the Arizona Territory, and by nearly 25 percent of the male, non-native populace was prospectors. By the ’s a plethora of hardrock mines were yielding prodigious volumes of copper, lead, zinc, silver and gold ore.

Gold processing, preparation of the ore for use in various products. Native gold is the most common mineral of gold, accounting for about 80 percent of the metal in the Earth’s crust. It occasionally is found as nuggets as large as 12 millimetres ( inch) in diameter, and on rare occasions.   disseminated ore, scattered ore [ The valuable mineral is fairly evenly distributed through the gangue as crystals or aggregates of regular size] Einsprengungserz n, Imprägnationserz.


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Detecting and Sorting Disseminated Native Copper Ores by United States. Bureau of Mines. Download PDF EPUB FB2

Detecting and sorting disseminated native copper ores (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: V R Miller; R W Nash; A E Schwaneke; United States.

Bureau of Mines. Detecting and Sorting Disseminated Native Copper Ores. Authors developed and evaluated a detector-sorting device to separate the copper-bearing portion from the barren portion of native copper ores.

Small-scale sorting tests were run on minus 1-inch plus 1/2-inch size materials from the following Michigan samples: Winona, Kingston, and.

Detecting and Sorting Disseminated Native Copper Ores. book By Vernon R. Miller, joint author. Schwaneke, joint author. (Robert W.) Nash, Rolla Metallurgy Research Center (U.S.) and United States. Bureau of Mines. Get this from a library. Preconcentration of native copper ore by electronic sorting.

[Vernon R Miller; R W Nash; Alfred E Schwaneke; United States. Bureau of Mines.] -- The Bureau of Mines developed and evaluated a detecting and sorting device to separate the copper-bearing portion from the barren portion of Michigan native copper ore in the minus 4- plus 1-inch.

The copper ore production process operation as defined in Section is simulated for a period of one year with various failure modes. The time evolution of the cumulative cost curves and copper output for Monte Carlo (MC) simulations are shown in Figure 5 for easier visualisation.

More MC simulations can be done while characterising the system. TOMRA Sorting Solutions utilizes cutting-edge copper sorting technology to get results from copper mined sulphide and oxide deposits.

Our copper sorting technology treats feeds from both types of ores based on different physical properties at feed rates of up to t/h. disseminated copper ore, scattered copper ore Porphyry-Kupfer-Erz n. Native copper is an uncombined form of copper that occurs as a natural is one of the few metallic elements to occur in native form, although it most commonly occurs in oxidized states and mixed with other elements.

Native copper was an important ore of copper in historic times and was used by pre-historic peoples. Native copper occurs rarely as isometric cubic and octahedral.

Copper extraction refers to the methods used to obtain copper from its conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.

2 Hydrometallurgy is the recovery of metaIs from ores using water-based solutions. As early as B. C., native copper–the pure metal—was foundas reddish stones in the Med- iterranean area and hammered into utensils, weapons, and tools.

Around B. C., artisans discovered that heat made copper more malle-able. These auriferous copper ores are especially abundant in Colorado, Utah, Montana and British Columbia. Also at Gold Hill, North Carolina and in Newfoundland. The third class of gold ore is auriferous lead ores.

The percentage of lead is large and the gold content often small. They are refractory ores like the copper ores.

Copper Mining: The commonest ore used in the extraction of copper is Chalcopyrite (CuFeS 2) also known as Copper Pyrites and other such sulfides. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable.

The concentration of ore is required and it is done by the Froth Flotation method. Concentration of Ore. districts. The Keweenaw Peninsula native copper district produced 11 billion lbs of copper and a lesser unknown but signifi cant quantity of silver.

Native copper deposits in this district are stratiform and hosted by tops of rift-fi lling subaerial basaltic lava fl ows and. The disseminated mineral deposit is a geological body, and mostly consists of metallic ore mineral in low concentrations. Many of these deposits contain very low ore grades, measuring just about a few ounces per ton, and these ore minerals are not visible to the naked eye.

The Bureau of Mines developed and evaluated a detecting and sorting device to separate the copper-bearing portion from the barren portion of Michigan native copper ore in the minus 4- plus 1-inch size range.

Small-scale sorting tests were also conducted on minus 1- plus 1/2-inch material from the Centennial No. 6 Mine, using a previously. Uses of Copper. Native copper was probably one of the early metals worked by ancient people.

Nuggets of the metal could be found in streams in a few areas, and its properties allowed it to be easily worked without a required processing step. Today most copper is produced from sulfide ores. Copper is an excellent conductor of electricity.

Copper was discovered and first used during the Neolithic Period, or New Stone Age. Though the exact time of this discovery will probably never be known, it is believed to have been about bce.

Copper is found in the free metallic state in nature; this native copper is the material that humans employed as a substitute for stone.

Copper is not difficult to extract from it ores, but mineable deposits were relatively rare. Some, such as the copper mine at Falun, Sweden, date from the s, were the source of great wealth. One way to extract the metal was to roast the sulfide ore then leach out the copper. Copper Ores (c) Vin Callcut Cuprite crystals from the Irish Mag Mine, Bisbee, Arizona.

Several modified cubes of Cuprite are disseminated over the top of this "x"x" specimen. It was collected in and is from the collection. deep intense blue azurite, bright green malachite and flashy native silver in a. Disseminated ore - Ore carrying small particles of valuable minerals spread more or less uniformly through the host rock.

Native metal - A metal occurring in nature in pure form, Porphyry copper - A deposit of disseminated copper minerals in or around a large body of intrusive rock. It occurs invisibly disseminated in small quantities through many minerals, particularly sulfides, and visibly intermingled with native copper.

Native silver has been found in the United States with native copper in the copper mines of Lake Superior where fine crystals have been found in the calcite veins cutting the copper-bearing rocks, and.Native Copper was the only source of copper until the turn of the century, when extraction methods were improved.

The copper ores are far more abundant than Native Copper, and are the main source of copper today. Even though, Native Copper is sometimes mined on its own for the copper content. Copper ranks second as the most-used metal in the world.The ore minerals in most of the world's iron and manganese reserves were chemically precipitated in the ocean and accumulated on the sea floor.

Placer deposits are heavy metallic minerals, such as iron or titanium minerals, or native gold or diamonds, that have been concentrated by wave or water action in a river or beach environment.

The.