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MINERAL RESOURCE ESTIMATION FOR ASTEROID MINING …

to an 'Ore Reserve' in which total tonnage and grade are above the economic cut-off and a speci-fied mining operation working on a specified min-ing plan, with a specified metallurgical flowsheet will be supported. Orebody Model: Note the key role of the Orebody model as the basis for the estimation of ore …

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Accuracy in Powder Diffraction IV Uwe König NIST ...

Iron ore mining and traditional grade control 3. Cluster analysis introduction / basics 4. Cluster analysis example – from measurements to via ... The score calculation is carried out by the same algorithm that is used for Search/Match. ... actual cut -off indicated by a blue stippled line. The final task is to

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Ore Reserve Estimation Method

Estimates of the tonnage and average grade of ore deposits (ore-reserve 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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Block size selection and its impact on open-pit design and ...

the tonnage vs. cut-off, mean grade vs. cut-off and metal vs. tonnage curves are used. The last represents the metal content (ore tonnage multiplied by its mean grade) as a function of the ore tonnage, and is useful in analysing the support effect as it shows a hierarchy according to the block size. For example, if for the same mined ore ...

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Cut-Off Grade | The Impact of Getting it Right! - MINING.COM

Iron Ore; Gold; Battery Metals ... We will then explore what goes into a cut off grade calculation and the impact that this has on your reserves base, mine plan, cashflow and overall ...

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(PDF) Calculating the value of iron ores in ironmaking and ...

At present we are witnessing large investments in the iron ore industry, fuelled by demand from Asia. At the same time, there is a changing landscape in pricing of iron ores, with the recent ...

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Learning Goals: -What is an ore deposit?

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.

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Lump Ore Properties and Their Impact on Value-in-use in ...

It is therefore important to consider this value when developing projects, making mine planning/cut-off grade decisions and in setting price differentials for differing quality.This paper describes the use of the Marx value-in-use model to quantify the downstream value of lump iron ores.

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MINERAL BLOCKSUMMARY PART A-GENERAL INFORMATION …

calculation purpose, pro rata of EC is used i.e4.433mt)) High grade Ore (55% Fe cut Off) 171734005.43 Lump- 25%(42933501.36) Fines- 75%(128800504.07) Avg Grade-60.17 Low grade ore (45% ... 07 Accessibility The leasehold of Thakurani Iron Ore Mine over 228.04Ha is well connected

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METHODS OF ORE RESERVE ESTIMATION_EXAMPLE

Consider this regular drill pattern spaced 30m by 20m of High Grade at Minetechpg Copper Deposit.There are nine drill holes ranging from DDH 1 to DDH 9. Assuming the surface is flat and faults/discontinuities terminate the continuity of the deposit in which the drill holes define the boundary of the orebody, determine as accurately as possible the tonnage and grade of the deposit using Polygon ...

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cut-off grade optimisation - ORELOGY

cut-off grade optimisation. One of the key areas where a mining engineer can demonstrably add value to a mining project is in optimisation of the mill cut-off grade. The benefit to Net Present Value of determining an appropriate elevated cut-off grade strategy cannot be underestimated.

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Indian Minerals Yearbook 2015 - IBM

IRON ORE production. Thus, 29 iron ore mines, each producing more than one million tonnes of iron ore annually, con-tributed about 81% of the total output in 2014-15. Out of 32 captive iron ore mines in the country,12 were in the Public Sector. The production of captive mines in the Public Sector was 23 million tonnes or 38.6%

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Ore reserve calculation.pdf - Ore reserve calculation ...

Cut-off grades in underground mines • Capacity constraints are common in underground mines. These may include constraints imposed by ore body geometry, geotechnical conditions, shaft and haulage capacities, ventilation requirements, mining method, size and type of mining equipment, health and safety regulations, and other restrictions that limit production from a stope, a mine section, or ...

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A Robust Optimization Modeling for Mine Supply Chain ...

For each mining location, based on the estimation of the natural ore grade, the manager must determine a cut-off grade to optimize the quality and quantity of the mined ore. Generally speaking, the higher the cut-off grade, the higher the ore quality while the lower the ore quantity, since the iron ore blocks with a natural ore grade lower than ...

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Iron ore pricing explained | Metal Bulletin.com

The company is also a key user of Metal Bulletin's 62% Fe Iron Ore Index (MBIOI-62) for its mid-grade products. The days of the annual "mating season" - when steelmakers and major iron ore miners would play brinkmanship over who would give way first over setting an annual iron ore price - are long over.

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Iron ore pricing explained | Fastmarkets

For example, the daily, weekly and monthly indices are listed because of the varied liquidity displayed by different parts of the market. Sinter fines and lumps make up the bulk of the seaborne iron ore market, and are the products most frequently traded on a spot basis, so daily pricing is used for the key 62% Fe, 58% Fe and 65% Fe fines, and lump premium references.

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Publication - CUT-OFF GRADE DETERMINATION PECULIARITIES ...

The main ways of cut-off grade determination can be: 1) empirical data among iron ore deposits of one specific geological and technological type, which are effectively developed; 2) direct calculation of parameters; 3) initial technical and technological data of mining enterprises that exploits deposit. Dynamics of reserves quantity and quality ...

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20.1 Metal Deposits – Physical Geology

Mining and Mineral Processing. Metal deposits are mined in a variety of different ways depending on their depth, shape, size, and grade. Relatively large deposits that are quite close to the surface and somewhat regular in shape are mined using open-pit mine methods (Figure 20.1). Creating a giant hole in the ground is generally cheaper than making an underground mine, but it is also less ...

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ORE DEPOSIT TERMS - Earth Sci

The cut-off grade is the arbitrarily defined lowest grade which will be mined from an ore ore deposit, and usually defines the boundary of the deposit. For example, if the average grade of a porphyry deposit is 0.5% Cu, the cut-off might be 0.2% Cu. any rock with a grade below 0.2% Cu would be waste.

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Predicting the Concentration Characteristics of Itakpe ...

onward utilization in cut-off grade assessment. Hence, various experts have attempted to establish if there is a functional relationship between ore grade (feed grade) and concentration characteristics like recovery, yield, and tailings grade which are essential variables in cut – off grade estimation. If such

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Augyva: Duncan Lake Iron Ore Project NI 43-101 Mineral ...

The following is a summary of the mineral resource estimate based on the Company's 2008-2009 drilling program, using a cut-off grade of 16% Fe: Resource classification Tonnes Fe %

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Global Iron Ore Mining Outlook

Global Iron Ore Mining Outlook ... effectively cutting off 40mnt of iron ore per annum. ... China's iron ore sector will become increasingly consolidated due to high costs of mining low grade ore, and

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

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). For MRE reporting, COGs tend to be rounded down to ensure that material of no economic significance is excluded from the resource. To calculate a COG, we can gauge the likely ...

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ore dilution and ore recovery - SlideShare

The milling cut-off grade for this operation is calculated to be 0.30g/t. It means that a tonne of ore with 0.3g/t can be sent to the mill and be expected to generate a small amount of profit. Ten percent dilution in this mine will reduce the grade of ore from 0.3g/t to 0.28g/t which is below cut-off grade and will not be able to return a profit.

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Chapter 4: Mining waste - SGU

The amount of tailings generated is dependent on the ore grade, (proportion of valuable minerals in the ore). For example, if the cut-off grade in the ore is 1 % Copper, 99 percent of the total ore would be deposited as tailings. Iron ores generally have higher grades than sulfide or gold ores, often going over 50 per cent or more.

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Productivity in the Mining Industry: Measurement and ...

3.5 Iron ore mining: production and ore grade,1971-72 to 2006-07 50 3.6 Combined average ore grades over time for base and precious metals 51 3.7 Other metal ores n.e.c.: production and ore grade, 1971-72 to 2006-07 52

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BENEFICIATION OF IRON ORE - nitrkl.ac.in

The cut-off grade for estimating the hematite resources has been taken as 57% Fe. If the cut-off grade is reduced to say 43% Fe, the iron ore resources will increase considerably and thus bearable utilization of iron ore can be achieved.

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brockmanmining.com - Brockman Mining Limited > Our ...

It has been estimated within geological boundaries using a 38% Fe cut-off grade for beneficiation feed mineralisation and a 52% Fe cut-off grade for CID mineralisation. It has not been updated since to comply with the JORC Code 2012 on the basis that the information has not materially changed since it was last reported.

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Cut Off Grade Calculation Optimization

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 a cutoff grade policy to be used during an exploitation of a deposit is not. Use of simply calculated breakeven cutoff grades during the production will ...

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Strategic Mine Planning Course - optitek.ca

• Case studies – Iron Ore; Gold-Copper, and Oil Sands . Day 1 Module 1: Pit Limits Optimization ... Iron Ore • Project cost calculation o Waste and ore mining costs ... Module 4: Cut-off Grade Optimization & Stockpiling • Cut-off Optimization - Lane's Theory

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I R O N O R E L I M I T E D For personal use only

Legacy Iron Ore Limited ASX Announcement 20 July 2011 Modelling and ore reserve estimation by SRK Consulting has resulted in the calculation of a JORC compliant Inferred Resource for this first phase program as shown in Table 1 below: Cut off grade Fe % Tonnes (Mt) Fe …

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Dilution and ore recovery - QueensMineDesignWiki

Total Waste: Rock which includes mineralization below the cutoff grade Run of Mine Ore (Tt): The tonnage generally sent to the mill, sum of geological reserves, planned waste, and unplanned waste Figure 1 shows an example of the various types of waste, reserves, and dilution for a simple stope.

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