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The cut off applied is 1 g/t Au for both classes; Resources are rounded to the nearest 10,000 tonnes; Figures may not compute due to rounding; Cut off grades are based on mining, processing and G & A costs of $38/t; Mineral Resources and Metal Content for Gold as of December 2011
Sep 30, 2020· The cut-off grade takes into account Operating Mining, Processing/Haulage and G&A costs, excluding capital. The Mineral Reserve is depleted for all mining to September 30, 2020. Mineral Reserve tonnage and contained metal have been rounded to reflect the accuracy of the estimate, and numbers may not add due to rounding.
Mar 01, 2019· The grade-tonnage curve of the mineral reserves as well as economic and operational or technical parameters contribute as an input to the determination of cut-off grade, i.e. the economic criteria that guides the movement of materials from the mine (or pit) to the subsequent stages (waste dumps or processing plant and refinery) within the system.
The cut-off grade takes into account Operating Mining, Processing/Haulage and G&A costs, excluding capital. The Mineral Reserve is depleted for all mining to September 30, 2020. Mineral Reserve tonnage and contained metal have been rounded to reflect the accuracy of the estimate, and numbers may not add due to rounding.
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.
Open Pit Ore Reserve: 22.7mt @ 0.85 Cu (0.3% cut off) (JORC) Mine Life: 9 years; Processing Rate: 2.6mt/year ore; Plant Design Capacity 17,000 tpa copper cathode; Mining Strip Ratio 6.3 : 1 (ave. LOM) C1 Cash costs: US$1.75/lb; General Information: The mine is located on a granted mining license (ML125), and has an Environmental Clearance ...
A presentation about optimising processing costs through the assessment of geological and mining cut-off grades, first presented at CRU 2017. This website is currently showing content in English. You can select a different region and language at the site's top left corner. ... Extractive Metallurgy and Mineral Processing.
With Minemax Scheduler, you can optimize all aspects of your mine schedule at once, including trucking, waste dump sequence, cut-off and cut-over grades, material destinations, leach processing, and CAPEX to achieve maximum value for your business. Talk To Our Team
Feb 12, 2020· Traditional ore-waste discrimination schemes often do not take into consideration the impact of fluctuations of the head grade, which have on the performance of mineral processing facilities. This research introduces the use of target grades for processing destinations as an alternative to cut off grade-based methods and models, in each …
That cut-off will be whatever grade is needed to recover enough metal or mineral to pay the cash costs of production. These costs typically comprise mining (stoping and stope development), hoisting/hauling, processing, royalties and general and administrative (G&A) costs. If the revenue from the recovered metal or minerals covers these costs ...
The Canadian Institute of Mining, Metallurgy and Petroleum . Suite 1250, 3500 de Maisonneuve Blvd. West . Westmount, Quebec H3Z 3C1 CANADA . Tel.: (514) 939-2710 Fax: (514) 939-2714 . CIM Estimation of Mineral Resources . and Mineral Reserves . Best Practice Guidelines . Prepared by the . CIM Mineral Resource and Mineral Reserve Committee
Cut-off grade. is the grade (i.e., the concentration of metal or mineral in rock) that determines the destination of the material during mining. For purposes of establishing "prospects of economic extraction," the cut-off grade is the grade that distinguishes material deemed to …
Since there is a similar potential for optimization between open pit mines and underground mines, this paper extends the utilization of Lane's theory and proposes an optimization model of the cut-off grade applied to combined mining-mineral processing in …
Jan 30, 2012· Minimum Cut-off Grades Text Expand this node 4. Cut-off Grade for Polymetallic Deposits Text Expand this node 5. Cut-off Grade and Optimization of Processing Plant Operating Conditions Text Expand this node 6. Cut-off Grade and Mine Planning - Open Pit and Underground Selective Mining Text Expand this node 7. Cut-off Grade and Mine Planning ...
could be used to optimize the overall cut-off grade for a combination of mining-mineral processing underground mines with multi-metals. 1. objective function In a combined mining-mineral processing underground mine, there are typically two stages of operation: (i) the mining stage, in which units of various grades are mined up to
Cut-off Grades and Optimising the Strategic Mine Plan (Spectrum) [Hall, Brian] on . *FREE* shipping on qualifying offers. Cut-off Grades and Optimising the Strategic Mine Plan (Spectrum) ... and was involved in studies across a range of mining, mineral processing and pyrometallurgical systems. Brian joined AMC Consultants in 1994 ...
Cut-off Grade 16% P 2 0 5 17% P 2 0 5 18% P 2 0 5 In-Situ H4 H2 • Tonnage sensitivity to mining approach • Sensitivity of different seams to different cut-off grades • Impact of mining approach on deleterious element • Sensitivity assessment can be run on multiple scenarios individually or in combination - P 2 O 5, SiO 2, MgO, Cd etc.
An introductory text and reference on mining engineering highlighting the latest in mining technology Introductory Mining Engineering outlines the role of the mining engineer throughout the life of a mine, including prospecting for the deposit, determining the site's value, developing the mine, extracting the mineral values, and reclaiming the land afterward.
Sep 15, 2021· Updated Mineral Resource Estimate Highlights at 0.207 g/t Au Cut-off: Measured and Indicated Mineral Resources of 349,000 ounces of gold at a 0.41 g/t Au grade. ... based on an open pit mining and ...
Cut-off is based on break-even economics at a Zinc price of $1.07/lb, with an assumed zinc recovery of 94%, and actual processing, and G&A costs from the ESM operation. No mining costs were considered in the calculation of this COG, as the pit optimization incorporates the mining costs to develop the shape for reporting.
the mineral deposit, mining technology, processing methods, and ... higher cut-off grade. This will increase the value of the run-of-mine product, and the mine will maintain its profit. Another way is to ... Ore: Mineral deposit that can be worked at a …
(8) Out-of-pit Mineral Resource NSR cut-off considers ore mining, crushing, transport, processing and G&A costs that respectively combine for a total of ($58 + $2 + $6 + $20 + $4) = CAD$90/tonne processed.
x = the proportion of mineral resource above cut-off, i.e. the ratio of mineral reserve to mineral resource (payability), and 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 ...
Reduce cut-off grades and increase recovery for gold, silver and platinum group metals (PGM) ... Mineral processing of gold, silver and PGM ores requires a constant quality of ore feed to the concentrator. ... Many old gold tailing facilities have still impressive residual mineral values and get in the focus of mining companies for reprocessing ...
Multi-mineral cut-off grade optimization by grid search indirectly related to the grade distributions of the component minerals. The amounts of each mineral extracted in the mining stage and sent to the processing plant and subsequent stages are estimated on the basis of equivalents and not on the basis of the component minerals. Thus, the actual
The Mining Essentials Full Course provides a complete and thorough overview of the mining industry life cycle for those working, interest, studying or new to the mineral exploration and mining industry.The course has been refined over more than 15 years of delivery to professionals, industry, governments and communities. It covers everything from mineral …
Cut-off grade applied to the open pit Mineral Resources is 3% Pb+Zn and that applied to the underground is 5% Pb+Zn. Based on the following metal prices: US$0.95/lb for Pb, US$1.05/lb for Zn, and US$16.5/oz for silver. Exchange rate of US$0.75 : A$1.0. Metallurgical recoveries vary by zone and material type as follows:
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.
Jan 01, 2018· Mineral operations consist of three phases: mining, processing, and refining. In single-product and single-process mode, the optimum cut-off grade and the net present value of production are calculated for each year of the mine's life.
May 25, 2018· Where i = 1, N (mine life), gmilling,(i) is the cutoff grade to be used in Year i. The Fi is the opportunity cost per ton of material milled in Year i and it is defined as: Where d is the discount rate; NPVi is the NPV of the future cash flows of the years (i) to the end of mine life N; and the C is the total processing capacity in Year i.
processing cost is then equal to the value of the resulting mineral after processing minus the sales cost. Finding the OCOG is a bit more complicated because first, the opportunity cost of maintaining unexploited reserves has to be calculated, and then added to the processing cost. However, this value will automatically optimize the NPV and IRR.
A 4 g/t AuEq cut-off was deemed appropriate for assumed underground mining and mineral processing methods while providing adequate continuity of mineralized blocks; Mineral resources as reported are undiluted; Mineral resource tonnages have been rounded to reflect the precision of the estimate
The mineral resources are unconstrained and presented at an undiluted 0.20 gt gold cut-off grade which represents mineralization that is potentially available for open-pit mining and heap-leach processing.