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As you can see in the example above, the deposit does not have to be enormous in size (only 500 meters long by 100 meters wide) to contain a valuable deposit (approximately 6 billion worth of minerals). However, in order to be as realistic as possible about this valuation, you can not assume that the complete ore body contains the same grade ( 2% copper and gram per tonne gold).
Mar 24, 2017· As a rule of thumb, open pit mining can process ore for 10 per tonne and, where the ore grade is more than double that at 20 per tonne, results would be economic.
To be economically viable for mining, iron ore must contain at least 20% iron. Magnetite ore has the highest proportion of iron, at 65%. ... The mass of iron ore is 6,085 kg. ... copper ore are ...
This is not enough to make it commercially viable to extract the rock. Copper mines are only set up where there is more than 5kg of copper per tonne of rock (% by mass). Ideally, the figure should be closer to 2%. The flow chart shows you how copper is extracted from its ore .
Apr 24, 2018· What the researchers found was that even with the offsets, it still costs 13 times more just to obtain metals from ore than from urban mining. So it seems that urban mining can be environmentally friendly, but it can also be economically viable as well.
Ore grade: An ore grade measures the percentage of copper oxides or sulfides in a rock. A commercial copper deposit will usually contain between % to 1% copper ore as well as other metals and ...
Looking at copper, for example, we can see that while average rock has around 40 ppm (parts per million) of copper, a grade of around 10,000 ppm or 1% is necessary to make a viable copper deposit. In other words, copper ore has about 250 times as much copper as typical rock.
Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of % pure copper called cathodes, which will ultimately be made into products for everyday most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and pyrometallurgy, respectively, due to the different ...
These mines have now closed and today the biggest copper mines are in Chile (ndida mine) and Indonesia (Grasberg mine). These produce many millions of tonnes of copper ore per year. The main ores of copper are sulfides and oxides. From their chemical formulas you can calculate the percentage of copper in each mineral.
ore, metalbearing mineral mass that can be profitably mined. Nearly all rock deposits contain some metallic minerals, but in many cases the concentration of metal is too low to justify mining [1] the ore.
However, only a tiny fraction of these reserves is economically viable with presentday prices and technologies. Estimates of copper reserves available for mining vary from 25 to 60 years, depending on core assumptions such as the growth rate. Recycling is a major source of copper in the modern world.
Gold average economic abundance in the ore today is in the range of to oz/ton or ppm, but deposits yielding grades to the fire ... Native gold contains usually eight to ten percent silver, but often much more — alloys with a silver content ... The major categories of commercially viable recovery processes include the ...
Oct 21, 2015· A cubic meter of ore carrying rock will weigh about tonnes. ... a 1 ppm variance can mean the difference between an economically viable gold deposit. ... Mass percent is used to express the concentration of substances that are not pure, for example, the content
Sep 08, 2019· Ore grade: An ore grade measures the percentage of copper oxides or sulfides in a rock. A commercial copper deposit will usually contain between % to 1% copper ore .
Some ore types can be treated by crushing, grinding and mixing ore with water to produce slurry. The coppercontaining particles are then removed by a process called flotation. The product of this process is dry, gray powder called copper concentrate, which contains about 30 percent copper. The concentrated copper is sent by rail to a smelter ...
Placer gold deposits are generally easier and cheaper to extract gold from, but as mentioned above, few economic placer gold deposits remain today — those in existence are mostly low grade and ...
Environmental Geology Ch 13. Mineral and Rock as a Resource. STUDY. ... relative to average rocks, to make it economically worth mining. Concentration Factor. The way a given ore is described in terms of the enrichment. ... need only be concentrated by a factor of 4 to 5 times for mining to be profitable. Copper may be inriched 100 times ...
percentage of the desired metal in that mineral and then multiply the percentage to the mass of the mineral, then you use that mass to determine a percentage of metal in that ore by dividing by the mass of the ore.
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: The ore is crushed into a fine powder and a suspension is created in water. To this are added, Collectors and Froth Stabilizers.
Part Three Resources and Technology – Princeton University – . rocks generally form from a molten mass such . could be economically extracted at the time pper from percent ore was estimated to re » More detailed! Copper – Wikipedia, the free encyclopedia. Copper is a chemical . The largest mass of elemental copper weighed 420 tonnes and was found . only a tiny fraction ...
Although some silverbearing ores contain silver as their largest metal value, virtually none has silver as its main constituent. A typical ore might contain percent silver, percent lead, percent copper, and percent antimony. After flotation separation, the concentrate would contain. Read More; thorium. In thorium processing ...
Mineral Resources. Almost all Earth materials are used by humans for something. We require metals for making machines, sands and gravels for making roads and buildings, sand for making computer chips, limestone and gypsum for making concrete, clays for making ceramics, gold, silver, copper and aluminum for making electric circuits, and diamonds and corundum (sapphire, ruby, emerald) for ...
The ore body at the Mission Mine has an average grade of about percent copper, which means every ton (2,000 pounds) of ore produces about 13 pounds of copper. But for every ton of ore, about three more tons of waste rock must be removed. Only the enormous scale and efficiency of an openpit mining operation can make such a lowgrade ...
What''s in an ore? There are many types of copper ore found throughout the world. Picture 4 shows the distribution of these deposits. About 80% of all copper extracted comes from sulphide ores. A typical ore contains only % to % copper. It is a measure of the value of copper that it is worth extracting it from such small concentrations.
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