XinHai Mining

Product Introduction

    • CODELCO RECENT DEVELOPMENTS AND PERSPECTIVES

      declining average industry ore grade 0.80% Environmental and community challenges Increasing scarcity of water supply Legal obstacles and lack of predictability New projects with lower ore grade and metallurgically more complex . Rampup of several new operations have not met the production target.

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    • Determination of optimum cutoff grades of multiple metal

      Other methods for discrimination of ore/waste in multiple metal deposits are Critical level method, Net Smelter Revenue (NSR) method, Single grade cutoff approach, Dollar value cutoff approach (Annels 1991Barid and Satchwell 2001). None of these methods is an optimized technique, because the distribution of grade of mined material, mining

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    • mining part ii d32ogoqmya1dw8.cloudfront.net

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

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    • The key drivers behind resource growth an analysis of the

      There is a tradeoff between tonnes and grade Rio Blanco copper deposit 0% 2% 4% 6% 8% 10% 1 10 100 1000 10000 16 Grade (%Cuequiv) 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 cutoff grade grows the resource = MORE METAL lower grades could signify

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    • Ore grades and mining Google Docs

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

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    • Types of Copper Deposits in the World INN

      example, 1,000 kilograms of copper ore containing 300 kilograms of copper metal has a grade of 30 percent. When metal is at a much lower concentration, it may be described in terms of parts

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    • Determination of Leaching Cutoff Grade Using Economical

      of Leaching Cutoff Grade Using Economical Evaluation in Sarcheshmeh Copper Mine. Cutoff grade for ore drawing is a kind of technological method used to control the process of

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    • What is cutoff grade? An introduction to overlooked yet

      is the cutoff grade? In simple terms everything above the cutoff 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.

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    • GeologyData.Info Info Portal of Geology with special

      1.4 Since the same cutoff grade of ore may result in different average grades of ores in different deposits, data regarding grade tonnage variation visvis cutoff grade changes are essential to estimate recoverable quantity of copper during mining and benefaction operations and /

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    • CutOff Grades For Mineral Resource Reporting SRK

      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.

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    • Porphyry Copper amp Grade MarketCap

      So would you rather have Escondida, or a few million tonnes of 5% copper, perhaps with a bit of zinc and other metallurgically annoying stuff? This leads to a second benefit, porphyry mineralisation is typically evenly distributed and best defined by a cutoff grade rather than a vein margin, footwall or similar in other types of copper deposits.

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    • Break Even Analysis How to Calculate the Cut Off Grade

      the OPEX is known, you can calculate the minerals cut off grade, which is the break even grade, below which it is not economically viable to mine the ore. To find out how I come up with the cost price per tonne (OPEX) if a feasibility study isnt available, I refer you to the note at the bottom of this page.

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    • (PDF) Stripping Ratios, Pit Limits amp Cutoff Grade

      8 Stripping Ratios, Pit Limits amp Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 2014 Stripping Ratios The stripping ratio (SR) refers to the amount of waste that must be removed for a given quantity of ore in open pit mining.

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    • Making the grade understanding exploration results

      24, 2017018332The Ivanhoe Mines Kakula deposit in the DRC has returned very high copper grades, including 11.91 metres (true width) of 6.23% copper at a 3.0% copper cutoff. GOLD One ounce, or

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    • OPTIMIZING THE CUT OFF GRADE IN SARCHESHMEH

      technical and economical data of different parts to determine the cut off grade. The result of the model was a cut off grade of (0.1408%), which brings about an increase of 848051645 US dollars as profit, in comparison to the cut off grade (0.1617%) that was obtained by the Lane tripartite model.

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    • Cutoff Grades for Mineral Resource Reporting

      13, 2016018332Some reasonable cutoff grade needs to be applied to the mineral inventory prior to reporting them as mineral resources. A table or chart of sensitivity to cutoff grade may be supplied but zero or nearzero cutoff grades may not be reported in most cases. The methods of determining cutoff grade can vary, particularly for open pit deposits.

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    • The key drivers behind resource growth an analysis of the

      There is a tradeoff between tonnes and grade Rio Blanco copper deposit 0% 2% 4% 6% 8% 10% 1 10 100 1000 10000 16 Grade (%Cuequiv) 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 cutoff grade grows the resource = MORE METAL lower grades could signify

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    • Understanding CutOff Grade 5 (Incremental Ore) or quotWhy is

      26, 2018018332Selection of an appropriate cutoff grade is the most important and fundamental driver of economic value for any mineral deposit. of gold or pound of copper, is not a rational cutoff grade

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    • pdfs.semanticscholar.org

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    • Ore Reserve Estimation Method

      of the tonnage and average grade of ore deposits (orereserve estimates) are made for various purposes. They may be made by examining engineers as a basis for placing a value on a mining property in connection with reports on behalf of owners or vendors, on the one hand, or for prospective purchasers or lessees, on the other.

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    • Mining Cutoff Grades Aussie Stock Forums

      12, 2006018332As the prevailing metal prices rise, the cost of extracing metals from lower grade ore bodies becomes less of an issue. As a result, copper mines that were once too expensive are now being opened up, while nickel ore bodies that would never be touched at

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    • Determining the optimum cutoff grades in sulfide copper

      effect of copper price variations on optimum cutoff grades (mining capacity is the limiting factor), concentration cutoff grade ( ), Heap leaching cutoff grade ( ) As a result, while the objective is to maximize the net present value, leaching and concen tration optimum cutoff grades of the hypothetical mine should decrease as copper

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    • Understanding CutOff Grade 4 (Tonnage, Grade, and Costs

      17, 2018018332The cutoff grade is therefore a minimum threshold and all blocks of material in your deposit or mine with a grade (value) above this threshold

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    • The key drivers behind resource growth an analysis of the

      There is a tradeoff between tonnes and grade Rio Blanco copper deposit 0% 2% 4% 6% 8% 10% 1 10 100 1000 10000 16 Grade (%Cuequiv) 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 cutoff grade grows the resource = MORE METAL lower grades could signify

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

      Grade Tonnage Curve How Far Can It Be Relied Upon? FRANCISCO SILVA 1 and AM205LCAR SOARES 2 1 Somincor face of variations of the cutoff grade. The main economic metal present in the ore is copper and the mineralization can be

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    • Cut Off Grade Calculation Optimization 911metallurgist

      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 a cutoff grade policy to be used during an exploitation of a deposit is not.

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    • Understanding CutOff Grade 5 (Incremental Ore) or quotWhy is

      26, 2018018332Selection of an appropriate cutoff grade is the most important and fundamental driver of economic value for any mineral deposit. of gold or pound of copper, is not a rational cutoff grade

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

      Grade Tonnage Curve How Far Can It Be Relied Upon? FRANCISCO SILVA 1 and AM205LCAR SOARES 2 1 Somincor face of variations of the cutoff grade. The main economic metal present in the ore is copper and the mineralization can be

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    • In mining, what do you mean when you say quotcutoff grade

      05, 2006018332Best Answer Assay results are the actual results of analysis of 'ore' samples that will tell you, for instance if you have ONE ounce of Gold per Ton of ore, or onehalf oz. of silver, or 2% copper. These tests are reliable, reproducible, and determine if a given 'ore' is actually commercially viable to mine or not. 'cutoff' grade is the grade at which it is not feasible or economical to mine

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    • Cutoff grade

      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 cutoff grade can be determined through a variety of methods, each of varying complexity.

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