(PDF) CALCULATION OF LOSS VOLUMES AND DILUTION
calculation of loss volumes and dilution of mineral DEPOSITS IN NEARCONTACT ZONES Sergey Antonovich Vokhmin 1, Alexey Aleksandrovich Kytmanov 2, Geor gij Sergeevich Kurchin 1,
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calculation of loss volumes and dilution of mineral DEPOSITS IN NEARCONTACT ZONES Sergey Antonovich Vokhmin 1, Alexey Aleksandrovich Kytmanov 2, Geor gij Sergeevich Kurchin 1,
When discussing openpit mining, dilution and ore loss are sometimes assumed as fixed factors in geostatistical block models and cutoff grade calculations, without considering specific particularities of the deposit and operation.
Abstract. Dilution is a critical issue that affects many aspects in mining. It is generally due to the geometric characteristics of the ore body, the mining operation, the characteristics of geologic contacts, and the limitations of the mining equipment to recover material to the desired boundaries or contacts.
Recovery and dilution usually are interrelated; with some methods of stoping a high recovery involves contamination of the ore from the walls or capping, and often clean ore can be obtained only by leaving some ore in the mine. In openstope mines the greatest loss of ore is that tied up in pillars left for support of the back or hanging wall. The amount of ore thus left varies considerably
car metering) in the mining field, and then loss rate and. dilution rate shall be calculated according to the calcula. tion formula (when wall rock is possessed of a certain. grade, wall rock grade shall be calculated). Calculation formula of indirect method: PIndirect= (1 T/Q) #215; (C C2) / (C1 C2) #215;,
Ore loss occurs when material containing grade (ore) is incorrectly sent to a waste dump. When a cost is given for Ore Loss, it is the sale value of the metal (gold, copper) recovered from this ore ( ore tonnes x grade x recovery rate x metal price). Dilution occurs when waste is unintentionally with material containing ore and sent to the mill.
#0183;#32;It means that a tonne of ore with /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 /t to /t which is below cutoff grade and will not be able to return a profit.
When discussing openpit mining, dilution and ore loss are sometimes assumed as fixed factors in geostatistical block models and cutoff grade calculations, without considering specific
#0183;#32;A common interpretation for area and thickness is as follows: In this case, loss and dilution can be calculated in a relatively straightforward manner. For example: Roof Loss Volume = Roof Loss Thickness * Roof Area. Floor Loss Volume = Floor Loss Thickness * Floor Area.
Dilution and ore loss have an important bearing on the success of open pit mining projects. Their impacts on production costs, revenues and production rate require that they are correctly modelled in the longterm mine plan. The estimation of dilution and ore loss is therefore an essential part of any Ore Reserve estimate or mine schedule.
described as mining loss which is economic mineralisation that has been lost during the mining activity. Mining Dilution is the percentage of material added to the insitu ore during mining. The mineral content of the diluent material is used to recalculate the grade of ore
In open pit mining, ore losses are not typically given much consideration. However in underground mining they can have a great impact on the project life and economics. Mining method sketches can play a key role in understanding underground dilution and ore losses, even in todays software driven mining
Scheme for determining the contact profile and the calculation of losses and dilution of minerals on geological contacts (Dashed line shows an optimal conditional position of the mining contour)
#0183;#32;Operational dilution in openpit mining can influence shortterm mine planning and affect the adherence between designed and executed plans, impacting the reconciliation results.
Estimating Mining Factors (Dilution and Ore Loss) in Open Pit Mines (English) Bertinshaw, R. / Lipton, I. / Australasian Institute of Mining and Metallurgy New search for: Bertinshaw, R.
Indirect= (1 T/Q) #215; (C C2) / (C1 C2) #215;, where, PIndirectMetal loss rate in the mining field, %; TTotal quantity of ore output in the mining field, t; QGeological ore quantity in the mining field, t; CGeological ore quantity grade in the mining field, g/t; C.
The Importance Of Dilution Factor For Open Pit Mining Projects Dilution increases the operating costs in the mill by increasing the tonnage of material to be milled. By better understanding the root causes of the dilution, quanitiying it, and planning accordingly, it can be controlled and reduced.
Most of the information in this whitepaper is relevant to open pit operations, however many of the concepts can be applied to underground situations . The creation of a simple ore loss and dilution calculator in Excel is a good first step see the example below . size and type of mining equipment .
Dilution can be quantified as the ratio of the tonnage of waste mined and sent to the mill to the total tonnage of ore plus waste that is milled (Wang et al., 2011, p. 334). It is always expressed as a percentage: Dilution =Waste tons #215; 100 Ore plus waste tons 1 /)/*/''#
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