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Iron ore cut off grade calculation

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

    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).

  • Comp profile Grange Resources Limited

    2010-9-29 · A lower cut-off grade of 15% DTR was used in the calculation of both the Mineral Resources and Ore Reserves. The Ore Reserve was calculated using a 1.087 dilution factor and a mining recovery factor of 0.939. These factors are based on periodic reconciliation specific to mining areas. Mineral Resource and Ore Reserve Estimates

  • Ungava Bay Iron Deposits Oceanic Iron Ore Corp

    A total of 10 individual mineralized domains were identified and each estimated into a separate block model. Given the continuity of the iron assay values, no top cuts were applied. All resources are reported using an iron cut-off grade of 25% within conceptual Whittle pit shells and a mining recovery of .

  • Break-even is broken - MINING.COM

    2016-9-12 · Using the cut-off value tonnage distribution for Mine A, it can be seen that a marginal break-even cut-off grade for the ore reserves estimate can have significant downside effect if there is

  • STAGES OF EXPLORATION & RESERVE/ RESOURCE

    2017-3-9 · and grade of ore body. c. Iron and manganese 200 to 400m, d. Bauxite 300 to 400m, e. chromite 300m, f. barite 500m, g. base metals 200m and h. gold 100m. 5. Sampling: litho geochemical from a well known section, pit/trench and Cut off grade Stopping width

  • Publication - CUT-OFF GRADE DETERMINATION

    2021-4-28 · 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

  • Cut Off Grade Calculation Optimization

    2018-5-25 · Cut Off Grade Calculation Optimization. Post navigation. Previous. Next. Table of Contents. Traditional Cutoff Grades in Open Pit Mining; 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

  • Introducing a software to calculate the grade and ore

    The tonnage of ore reserve and mean grade correspo nding to each value of cut-off grade can be determined using alternative approaches. A si mple method well-suited for the case grades

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

    mine planning/cut-off grade decisions, and in setting quality price differentials. This paper describes the use of the Marx value in use (VIU) model to quantify the downstream value of iron

  • iron ore cut off grade calculation - mahon

    Iron Ore Cut Off Grade Calculation. Iron Ore Cut Off Grade Calculation Industry News; Carp Fishing tactics includes rig ideas and methods to "Hi, I

  • Determining the different cut-off grades in a mine - Basic

    2017-9-25 · In mine planning process, the cut-off grade is determined prior to producing the reserve physicals. The different cut-off grades are the break-even cut-off grade (BECOG), incremental cut-off grade (ICOG), mill cut-off grade (MCOG), and resource cut-off grade (RCOG).

  • FINAL-20191111- Mineral Resouces and Ore Reserves

    2019-11-11 · Cut-off (SNSR/t A$) Category Tonnes Mt Cu % Au g/t Ag g/t Cu kt Au koz Ag Moz $20 Measured 140 0.8 0.4 3 1,200 1,650 13 Indicated 480 0.7 0.3 3 3,200 4,400 51 Inferred 340 0.3 0.1 2 890 1,400 19 Total 970 0.5 0.2 3 5,200 7,400 83 Table 2: Carrapateena Ore Reserves Estimate 1 4 5 as at 30 June 2019

  • Cut-off grade determination for the maximum value of a

    2009-8-26 · g is the average grade of the ore above cut-off. In the limiting cases the following formulae apply for mining: for processing and for marketing Note the last two terms for the processing and marketing equations are identical in form and in each case the cut-off grade will fall as F declines because the remaining life of the mine is reduced.

  • Iron ore pricing explained American Metal Market

    2018-6-1 · In the early days of iron ores derivatives market development, SMX was one of the first exchanges to offer a futures contract, based on Metal Bulletins 62% Fe index in 2011. SGX also launched a low-grade iron ore contract settled against Metal Bulletins 58% Fe Premium Index in 2015 to complement its established mid-grade offering.

  • Ore Selection Optimisation for an Iron Ore Deposit Using

    Iron ore is normally sold in bulk at certain specifications. These include iron grade and specific contaminant grades, typically silica, alumina, phosphorous and sulfur. These target grades are normally agreed between the mining company (producer) and the steelmaking company (customer).This study presents an alternative to traditional cut-off grade calculation, using linear programming that

  • Iron Ore Geoscience Australia

    2018-12-31 · The total detrital iron ore resource at Marillana now stands at 1400 Mt, with an average grade of 42.2% Fe, at cut-off grade of 38% Fe 46. The Marillana project is approximately 100 km northwest of the town of Newman. Koodaideri: The development of the Koodaideri mine has been initiated and progressed, according to Rio Tinto 47. The Koodaideri

  • METHODS OF ORE RESERVE ESTIMATION_EXAMPLE - Basic

    2019-8-18 · August 18, 2019 Break even cut off grade (BECOG), Breakeven stripping ratio, JORC Codes, Knowledge, Ore Grade, Ore Reserve Estimation, Ore Tonnage As requested by some good readers of this blog for numerical examples of ore reserve estimation methods.

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

    2010-2-4 · 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 %

  • Mineral Projects - Talga Resources

    Vittangi. Located approximately 20km east of LKAB's iron ore mine and railhead at Svappavaara, the Vittangi graphite project (containing the Nunasvaara and Niska deposits) has a total JORC resource of 19.5Mt at 24% graphite ("Cg"), the highest resource grade of any JORC/NI 43-101 graphite deposit in

  • CLASSICAL METHODS OF ORE RESERVE ESTIMATION - Basic

    2016-3-2 · Value is dependent on the ore grade and therefore the average grade of the polygons are then used to establish the grades of each polygon. The average grade of the deposit is determined by taking the arithmetic average of all grades of the individual polygons. Information is tabulated in the table below for ease of calculation and interpretation.

  • 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

  • MINERAL RESOURCE ESTIMATION FOR ASTEROID

    2014-1-6 · 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 reserves.

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

    2011-7-20 · 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 % SiO2 % Al2O3 % CaO % P % S % LOI %

  • Break Even Analysis - How to Calculate the Cut Off Grade

    For conducting a mining projects break even analysis, you first need to know about the operational expenses (OPEX).When 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

  • Mining Valuation Lesson: Cut-Off Grade Theory And Practice

    2011-12-6 · In other words, the grade that provides the US$46 is the cut-off grade. Let's once again assume that the gold price is $1000 per ounce, which is equal

  • How to politely drop an iron ore bomb on not China

    2020-12-3 · Certainly, in time other low cost producers of iron ore may (Reuters thinks it unlikely) enter the market but at the present time there is simply NO source of 700M tonnes of iron ore

  • Cut Off Grade Calculation Optimization

    2018-5-25 · 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.

  • Publication - CUT-OFF GRADE DETERMINATION

    2021-4-28 · 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.

  • Innovative optimization of iron ore blending in daily mine

    2019-12-9 · 29 Innovative optimization of iron ore blending in daily mine planning from a linear programming model Vidal Félix Navarro Torresª, Edilaila Moraesb aVale Institute of Technology, Belo Horizonte, Minas Gerais, Brazil, [email protected] b Vale S.A, Belo Horizonte, Minas Gerais, Brazil, [email protected] Abstract: This work aims to develop models and

  • BENEFICIATION OF IRON ORE - National Institute of

    2014-7-28 · 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.

  • Calculation of Ore Tonnage & Grade from Drill hole Samples

    2016-1-21 · MINERAL ORE RESERVE Case 1. When all holes have positive values, let a, b and c, be the depth of ore in the three holes forming the prism; to find the average depth of the ore influenced by any given hole, use the formula: d = 4a + b + c/6. Then, as one proceeds from hole to hole, b and c should be substituted, thus: 4b + a + c/6 and 4c + a + b/6,

  • Predicting the Concentration Characteristics of Itakpe

    2017-6-22 · 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

  • Optimisation grade control procedures at the open pit

    2016-8-25 · Abzalov et al., 2010: Optimisation of the grade control procedures at the Yandi iron -ore mine, Western Australia: geostatistical approach, Applied Earth Science Journal, v.119, No.3, p.132 -142 2 3 4.1% error: ORE blocks misclassified as WASTE 2.7% error: ORE blocks misclassified as WASTE 3 2.7% of SMU size ORE blocks are misclassified as WASTE

  • Iron Ore Price Trends & DR-Grade Premium Assessment

    2018-10-15 · Only high-grade iron ore will do Most DRI producers require pellet input feed of ~67% Fe or above to achieve typical target DRI quality Cut-off for being considered DR-grade can be looked at as an . economic. boundary more than a physical one. EAF . can. process higher gangue material but at a cost. * Thresholds assume 2%

  • Mineral Projects - Talga Resources

    Vittangi. Located approximately 20km east of LKAB's iron ore mine and railhead at Svappavaara, the Vittangi graphite project (containing the Nunasvaara and Niska deposits) has a total JORC resource of 19.5Mt at 24% graphite ("Cg"), the highest resource grade of any JORC/NI 43-101 graphite deposit in the world.

  • cut off grade for feldspar deposit - kotlekominy.cz

    The basics of the cut-off grade theory are described in Lanes The Economic Definition of Ore and most researchers use this book as the basis for their models (Lane, 1988). Lane describes the economic principles of how cut-off grades are derived and also how cut-off grades can be optimized at various stages of a mines life.

  • Published as: O. Mol and A.D.S. Gillies, Cut-off grade

    2013-5-26 · grade above a given cut-off grade". Royle's approach with slighl modification will be used in this paper, and the optimum cutoff grade is defined as the grade of ore that maximises the markelable reserves of ore. INTRODUCTION The grade distribution is never perfectly uniform within a GENERAL REQUIREMENTS mineral deposit.

  • Ore Selection Optimisation for an Iron Ore Deposit Using

    Iron ore is normally sold in bulk at certain specifications. These include iron grade and specific contaminant grades, typically silica, alumina, phosphorous and sulfur. These target grades are normally agreed between the mining company (producer) and the steelmaking company (customer).This study presents an alternative to traditional cut-off grade calculation, using

  • How to politely drop an iron ore bomb on not China

    2020-12-3 · Certainly, in time other low cost producers of iron ore may (Reuters thinks it unlikely) enter the market but at the present time there is simply NO source of 700M tonnes of iron ore

  • Optimum cut-off grades calculation in open pit mines with

    2018-6-12 · Cut-off grade a criterion used to discriminate ore from waste has direct impact on mineable reserves and average grade of the materials that must be processed. The most comprehensive method for determination of optimum cut-off grades in metal deposits with the goal of maximising the net present value is provided by Lanes algorithm.