Cut Off Grade Iin Mining

04/12/2011· Yet, it is an extremely important factor in mining valuations. Cut-off Grade Theory and Practice. Consider a block of ore that weighs 1 tonne and contains 3 grams of gold. At a gold price of US$1000 per ounce the value of the gold in the block of ore is just under $96 ($1000/31 X 3 or $1000 per ounce/ 31 grams (troy ounce) X 3 grams of gold) Simply put, if it were to cost

25/09/2017· 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). The BECOG is the one used for producing the reserve stope shapes and reserve

Cutoff 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. Cutoff grades are selected to achieve a

mineral processing. In mining: Delineation. This is called the mine cutoff grade. And, if the material has already been mined, there is a certain grade below which it is not profitable to process it; this is the mill cutoff grade. The grade at which the costs associated with mining and mineral processing just equal…. Read More.

13/07/2016· 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,

01/01/2018· Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation. Engineering Computations, 24 (7) (2007), pp. 723-736. CrossRef View Record in Scopus Google Scholar. Asad and Dessureault, 2005. M. Asad, S. Dessureault. Cutoff grade optimization algorithm for open pit mining

Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation. By Raul Cezar. Maximizing the net present value by applying an optimal cut-off grade for long-term planning of the copper open pits. By Daniel Krzanovic. Optimal production scale of open pit mining operations with uncertain metal supply

mineral processing. In mining: Delineation. This is called the mine cutoff grade. And, if the material has already been mined, there is a certain grade below which it is not profitable to process it; this is the mill cutoff grade. The grade at which the costs associated with mining and mineral processing just equal…. Read More.

13/07/2016· 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,

25/05/2018· Cut Off Grade Calculation Optimization. Post navigation. Previous. Next. Table of Contents. Traditional Cutoff Grades in Open Pit Mining; Heuristic Cutoff Grade Optimization Techniques; Optimizing The Cutoff Grades By Lane’s Approach; Algorithm for Determining Optimum Cutoff Grades ; Cutoff grade is defined as the grade that is normally used to

Using the modified optimum cut-off grade model presented in this paper not only the net present value of a porphyry copper mining project is maximized, but

12/09/2016· The cut-off grade that is used by most mining companies for the “process” / ”do not process” decision, rightly or wrongly, is the break-even cut

07/02/2020· Using the World Gold Council's g/t standard, many of the world's high-grade gold mines are in the United States, Russian, and Peru. The Fire Creek mine in Battle Mountain, Nev., for example, was,

CUT-OFF GRADE OPTIMIZATION OF OPEN PIT MINES WITH MULTIPLE PROCESSING STREAMS by Michael Nash Pettingell B.Sc., The University of South Carolina, 2010 A THESIS SUBMITTED IN PARTIAL FULLFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL

Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation. By Raul Cezar. Maximizing the net present value by applying an optimal cut-off grade for long-term planning of the copper open pits. By Daniel Krzanovic. Optimal production scale of open pit mining operations with uncertain metal supply

cut-off grade will be lower, and the reserve tonnage higher. If only over-break is reported, it will be a lesser number than total dilution and will fall in line with what other mines rep ort.

Dilution also increases the cut-off grade which in turn reduces the overall ore utilization of a mine. In some cases, to take advantage of economies of scale, mining operations tend to plan for higher mining rates. Moving to a larger scale of operation means less selectivity, hence more dilution. This is true for all kind of deposits. High level and uncontrolled dilution may ultimately

mineral processing. In mining: Delineation. This is called the mine cutoff grade. And, if the material has already been mined, there is a certain grade below which it is not profitable to process it; this is the mill cutoff grade. The grade at which the costs associated with mining and mineral processing just equal…. Read More.

02/03/2014· The cutoff grade is the grade at which the cost of mining and processing the ore is equal to the desired selling price of the commodity extracted from the ore. The cutoff grade is influenced by a few external factors that you can control to a certain extent, and these will be considered in the prefeasibility analysis when the cutoff grade is determined. Let’s imagine

13/12/2017· Abstract: Cut-off grade is one of the decision variables that must be determined correctly by the open pit mining company in order to generate the maximum total profit. This study develops a cut-off grade determination model by using analytical solution approach by considering cost and revenue components such as mining cost, waste removal/rehabilitation

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. It is not unusual to generate a value-add of greater than 10% by bringing higher grade ore

01/09/2016· Cut-off grade is the most important economic criterion that defines the supply of ore and waste material from the mine to subsequent processing streams and waste dumps, respectively (King, 1999, King, 2001, Wooler, 2001).The material with metal content greater than the cut-off grade is designated as ore because under existing economic situation, not only

A review of cut-off grade policy models for open pit mining operations. Iván Cárcamo. Hyongdoo Jang. Mohammad Asad. Iván Cárcamo. Hyongdoo Jang. Mohammad Asad . Related Papers. A heuristic approach to stochastic cutoff grade optimization for open pit mining complexes with multiple processing streams . By Roussos Dimitrakopoulos. Optimum cut-off

CUT-OFF GRADE OPTIMIZATION OF OPEN PIT MINES WITH MULTIPLE PROCESSING STREAMS by Michael Nash Pettingell B.Sc., The University of South Carolina, 2010 A THESIS SUBMITTED IN PARTIAL FULLFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL

Consequently, in relation to open- pit mining, cut-off grade can be defined as the minimum grade at which the value of the ore balances all costs on mining, waste removal, mineral processing, and smelting, together with the administrative costs attached to the above unit operations, and leave the corporate organization with at least, a minimum corporate rate of

The 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 cut-off. GOLD: One ounce, or roughly 30 grams/tonne is high-grade and can be expected to move markets in most cases. Several ounces of gold per tonne is considered to be high-grade for,

Dilution also increases the cut-off grade which in turn reduces the overall ore utilization of a mine. In some cases, to take advantage of economies of scale, mining operations tend to plan for higher mining rates. Moving to a larger scale of operation means less selectivity, hence more dilution. This is true for all kind of deposits. High level and uncontrolled dilution may ultimately