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Average Grade: The concentration of a mineral in the ore body ( % or g/t) 2% copper and gram per tonne gold: Strike Length: The length in which the mineralization is found in the ore body (horizontally) 500 meters: Depth: The depth in which the mineralization is found in the ore body (vertically) 200 meters: Width
You will find this explanation under the header How to Calculate the CutOff Grade, but in summary: 1% equals to 22 pounds. How To Calculate the Metal Value per Tonne. In the following table, I have created some examples for calculating the metal value, using the .
In the case of multiple processing options, cutoff grade is used to determine which process or destination the ore will be sent to, by using the following equation: Where U1 is the utility of sending ore to process 1, and U2 is the utility of sending ore to process 2. Utility is defined as the value (economic or otherwise) of selecting a process.
The copper ore bodies mined from 1911 to 1938 at Kennecott, Alaska (now within the Wrangell–St. Elias National Park and Preserve), are examples of potentially environmentally "friendly" ore deposits. The ore bodies consisted of veins of massive chalcocite (a mineral consisting of copper and sulfur).
Coppercontaining rock, or copper ore, holds only a small percentage of of the rock is unwanted material, typically referred to as gangue. There are two main types of copper ore of ...
which will help you to decide where to drill. Copper grade is the concentration of copper in the ore rock. To calculate the grade of copper for the sample, geologists use the equation: (amount of copper metal/amount of copper ore rock)*100 2. If a deposit area has 200lbs of copper in 10,000lbs of ore rock, what is the grade? 200/10000*100=2% 3.
separation, the products are as shown in Table 1. Using this data, calculate: (a) Ratio of concentration (b) % Metal Recovery (c) % Metal Loss (d) % Weight Recovery, or % Yield (e) Enrichment Ratio Table 1: Grade/recovery performance of a hypothetical copper ore flotation process. Product % Weight % Cu Assay Feed 100
A cutoff grade (COG) is an industryaccepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE). For MRE reporting, COGs tend to be rounded down to ensure that material of no economic significance is excluded from the resource.
Copper Ore Price. The page provides a list of copper ore and concentrate selling and purchasing offers. The proposals related to copper commodity and copper ore of different grades of purity and volume of supply from various countries. The information on copper ore international price, copper concentrate price per ton could be found.
Jun 26, 2020· Silver equivalent (AgEq) may be used in a silver mine with lead and zinc or other base metal credits. A nickel deposit may have PGE, gold or other minor constituents. Use this simple metal equivalents calculator to calculate common (and uncommon) equivalences. For each metal select the grade and the market price to be used in the calculations.
Part II: Ore Grades, Waste, and Remediation ! Section II: Ore Grades and Mining The grade of an ore is the concentration of the desired material within the rock. There is more metal (a higher concentration) in higher grade metal ores. Ore grades are often given in percentages or in units of ppm (defined below).
The most copper ores are not difficult to distinguish. Every one is familiar with the ruddy hue of pure copper, the color of the native metal. It may be flattened under the hammer or cut with the knife. A little of the ore mixed with grease colors a flame green. Copper ores are heavy, and generally of a bright color, either red, blue, green ...
To the untrained eye, gold ore may look like rock with copper tones flowing within it. However, professional prospectors know how to recognize gold ore within a multitude of minerals. Recognizing the look and the location of gold ore is easier if you know how to find lode and placer deposits. General descriptions of ...
Continuing with our VMS example let''s assume that we have a deposit with the following grades: % copper, % zinc, /t gold, 20g/t silver. If we assume current USD metal prices are: Copper 8,400 per tonne (84 per 1% of grade) Zinc 2,000 per tonne (20 per 1% of grade)
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 .
May 17, 2005· It is also often a byproduct of silver production. Sulphides, oxides and carbonates are the most important ores. Copper and coppe r alloys are some of the most versatile engineering materials available. The combination of physical properties such as strength, conductivity, corrosion resistance, machinability and ductility make copper suitable for a wide range of applications.
off grade and NPV provides a means by which cutoff grades can be optimized. For the purposes of a discounted cash flow analysis Lane defined value as a function of two factors, namely the size of the remaining ore reserve (S) and the rate of extraction (q). Intuitively these two factors will inform decisions about the capacity of the mine, for
In ores, the Fe content is lowered according to the amount of impurities present. Overall, the quality of iron ore is mainly judged based on the Fe content. More specifically, ores with Fe contents above 65% are regarded as highgrade ores; 62–64% medium (or average) grade ores and those below 58% Fe are considered as lowgrade ores [2–5].
Metallurgical ContentORE RESERVE CALCULATIONSMINERAL ORE RESERVE Case 1MINERAL ORE RESERVE Case 2MINERAL ORE RESERVE Case 3 The usual method of sampling mineral deposits is to drill holes and assay the sludge or core. Though the results thus obtained may not represent the true average value of the deposit, it is on these results that estimates of practically all .
A froth flotation process is used to concentrate copper ore. It is a twostage process that involves one rougher stage and one cleaner stage. The cleaner tailings return to the rougher flotation. Both stages are nonreactive unit operations that operate at steadystate. The analytical profile of .
May 24, 2019· The average grade of copper ores in the 21st century is below percent copper, with the proportion of ore minerals being less than 2 percent of the total volume of the ore rock.
You will find this explanation under the header How to Calculate the CutOff Grade, but in summary: 1% equals to 22 pounds. How To Calculate the Metal Value per Tonne. In the following table, I have created some examples for calculating the metal value, using the .
Determine the BESR in mining and processing a % copper ore deposit if the selling price of copper in concentrate is /kg and the overall unit costs are /ton and the cost of handling unit weigh of waste is /ton. The overall recovery is 92%.
highgrade ores contain a larger percentage Most metals are extracted from ores found in the Earth''s crust. It is more expensive and wasteful to extract a metal from a lowgrade ore, but most high ...
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