general copper ore cut off grade

Porphyry Copper & Grade | MarketCap

#2 copper is the third most valuable grade available. #1 Copper #1 copper is the second most profitable type to trade in. To be classified as #1, the copper should be comprised of bus bars, clippings, commutator segments and wire of at least 1/16th of an inch in diameter. It should also be clean in appearance, unalloyed and uncoated.

Cut-off grade estimation - QueensMineDesignWiki

Cut-Off grade is the minimum grade required in order for a mineral or metal to be economically mined (or processed). Material found to be above this grade is considered to be ore, while material below this grade is considered to be waste.. The cut-off grade can be determined through a variety of methods, each of varying complexity.

Mining Cutoff Grades | Aussie Stock Forums

Chalcopyrite - A sulphide mineral of copper and iron; the most important ore mineral of copper. Change house - The mine building where workers change into work clothes; also known as the "dry". Channel sample - A sample composed of pieces of vein or mineral deposit that have been cut out of a small trench or channel, usually about 10 cm wide ...

100 Years of Resource Growth for Copper - Impact of Costs ...

While the copper market is gaining momentum, it is a good time to look at the copper mining champions in terms of copper grade in ore reserves. The world's top 10 highest-grade copper mines ...

(PDF) Stripping Ratios, Pit Limits & Cutoff Grade ...

Table of ContentsTraditional Cutoff Grades in Open Pit MiningHeuristic Cutoff Grade Optimization TechniquesOptimizing The Cutoff Grades By Lane's ApproachAlgorithm for Determining Optimum Cutoff Grades Cutoff grade is defined as the grade that is normally used to discriminate between ore and waste within a given orebody. Although the definition of cutoff grade is very precise, the choice of ...

Optimal mill cut-off grade modeling in the mineral ...

optimum cut-off grades for the equivalent variable can be found by using any of the established methods of single mineral cut-off grade optimization, e.g., Lane (1964, 1988), Dowd (1976). Operating cut-off grades for the equivalent grades do not necessarily correspond to achievable, or even meaningful, cut-off grades for the grade-tonnage distrib-

Resources and Reserves - Aeris Resources

#2 copper is the third most valuable grade available. #1 Copper #1 copper is the second most profitable type to trade in. To be classified as #1, the copper should be comprised of bus bars, clippings, commutator segments and wire of at least 1/16th of an inch in diameter. It should also be clean in appearance, unalloyed and uncoated.

Cut Off Grade Calculation Optimization

The most commonly used grade is known in North America as electrolytic tough pitch (ETP) copper, UNS C11000, and as 'electro' in other countries. ETP copper exhibits a nominal conductivity of to 101.5% IACS (for International Annealed Copper Standard, the value of conductivity established about 100 years ago for the purest copper of the time).

Polymetallic deposit cut-off grade estimation ...

Mill (internal) Cut-off NSR. The mill cut-off NSR is described as the material that must be mined but can either be sent to the waste dump or processed as ore . The mill cut-off value is the difference between the mine operating cost and the mining cost.

Learning Goals: -What is an ore deposit?

Mar 23, 2017· Cut-off grade play a critical role in defining tonnages mined and processed, average grade of mill feed, cash flows, mine life time, and all major characteristics of a mineral deposit. Simply, the cut-off grade is the lowest grade at which material is considered ore and is processed to create a concentrated commodity product. Essentially, it asserts that the mill cut-off grade is a function of ...

Solved: Question 61 (1 Point) How Many Pounds Of 5% Grade ...

Cut-Off Grades For Mineral Resource Reporting: Going The Extra Rare Earth Mile This means knowing the costs and practicalities of mining and processing for a particular product. A cut-off grade (COG) is an industry-accepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE).

Grade Tonnage Curve: How Far Can It Be Relied Upon?

43 Example: Using the following information, calculate the mining and milling cutoff grade • % Recovery through mill and smelter = 90% • Value of recovered copper = $2.10/lb • Mining and transportation cost = $0.35/ton • Processing, smelting and refining = $1/ton • General overhead, administration, etc., (chargeable only to ore block ...

Ore grades and mining - Google Docs

Question: Question 61 (1 Point) How Many Pounds Of 5% Grade Copper Ore Need To Be Mined To Get 500 Lbs Of Copper? 25 0 100 2500 0 10,000 Question 62 (1 Point) Many Closed Mines Exist Throughout The United States (and Other Countries). If The Cut-off Grade Drops For Ores Once Extracted From These Legacy Mines, What Might Happen To These Old Mines? Likely Remai

Large Low Grade Copper-Gold Deposits: How Low Can Grade Go ...

May 01, 2015· For example if a certain ore type has an on-site processing cost of $20/tonne and G&A cost of $5/tonne, then in order to breakeven the ore NSR block value must exceed $25/tonne. If one decides to include mining costs and sustaining capital costs, then the NSR cutoff value would be higher.

Cut-off Grades for Mineral Resource Reporting - Micon ...

face of variations of the cut-off grade. ... In general, the ... The main economic metal present in the ore is copper and the mineralization can be described as being of the fissural or stockwork type. It is composed of veinlets and

Grade Tonnage Curve: How Far Can It Be Relied Upon?

face of variations of the cut-off grade. ... In general, the ... The main economic metal present in the ore is copper and the mineralization can be described as being of the fissural or stockwork type. It is composed of veinlets and

The world's top 10 highest-grade copper mines - MINING.COM

43 Example: Using the following information, calculate the mining and milling cutoff grade • % Recovery through mill and smelter = 90% • Value of recovered copper = $2.10/lb • Mining and transportation cost = $0.35/ton • Processing, smelting and refining = $1/ton • General overhead, administration, etc., (chargeable only to ore block ...

Resources and Reserves - Aeris Resources

Jul 13, 2016· Some reasonable cut-off grade needs to be applied to the mineral inventory prior to reporting them as mineral resources. A table or chart of sensitivity to cut-off grade may be supplied but zero or near-zero cut-off grades may not be reported in most cases. The methods of determining cut-off grade can vary, particularly for open pit deposits.

Multi-mineral cut-off grade optimization by grid search

Table of ContentsTraditional Cutoff Grades in Open Pit MiningHeuristic Cutoff Grade Optimization TechniquesOptimizing The Cutoff Grades By Lane's ApproachAlgorithm for Determining Optimum Cutoff Grades Cutoff grade is defined as the grade that is normally used to discriminate between ore and waste within a given orebody. Although the definition of cutoff grade is very precise, the choice of ...

Cut-Off Grades For Mineral Resource Reporting: Going The ...

The cut-off grade of an ore is essentially the lowest grade of an ore that is worth mining. If the ore grade is less than the cut-off grade, then a mining company will not make money mining that ore. According to Fellows (2010), the cut-off grade of an ore is one of the main factors in determining the economics of the mine.

Understanding Grades of Copper Scrap | ASM Metal Recycling

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.

Cut-Off Grades For Mineral Resource Reporting: Going The ...

A cut-off grade of 1.2% copper is used to estimate Ore Reserve in the higher-grade lodes 102 and 108. A cutoff grade of 0.9% copper is used for the lower grade 101 and 105 lodes that are to be mined in retreat at end of mine life. The Murrawombie deposit has separate Ore Reserve estimates for underground mining; and open pit mining.

Cut Off Grade Calculation Optimization

Average Grade: The concentration of a mineral in the ore body (i.e. % or g/t) 2% copper and 1.5 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

Structural factors in ore position, quality, and cut-off ...

Nov 28, 2010· MinEx Consulting Strategic advice on mineral economics & exploration There is a trade-off between tonnes and grade Rio Blanco copper deposit 0% 2% 4% 6% 8% 10% 1 10 100 1000 10000 16 Grade (%Cu-equiv) Resource (million tonnes) Source: MinEx Consulting March 2010 1100 mt @ 0.58% Cu = 6.38 mt Cu 65 mt @ 1.26% Cu = 0.82 mt Cu Lowering the cut-off ...

Cutoff grade - Wikipedia

Cut-Off Grades For Mineral Resource Reporting: Going The Extra Rare Earth Mile This means knowing the costs and practicalities of mining and processing for a particular product. A cut-off grade (COG) is an industry-accepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE).

(PDF) Stripping Ratios, Pit Limits & Cutoff Grade ...

May 16, 2018· In simple terms everything above the cut-off grade is ore, everything below is waste. In essence, it is the core determinate when defining an ore body. It will determine all of the critical parameters, such as the grade of the deposit, the size of the deposit and the amount of metal produced from the deposit.