### Sampling practice and theory - Mine Engineer.Com

02.08.2014· I have found that it can be useful in sampling, when used by pesonnel that understand the ore, and sampling, The table, above, relates the particle size of the material being sampled to the sample size required for a representative sample. As one can see, the finer the material being sampled, the smaller the size of sample required. Taken into account is the statistical fact that the finer ...

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Thames Tonnage which is based, like its forerunner, on the vessel's principal dimensions and has no other legal usages and no influence either at present or historically on the tonnage measurement and calculations developed by Captain Moorsom or IMO. It is, however, a useful method of calculating marine surveyor's fees. It is calculated by: TM = (L – B)B2/188 tons.

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Our online calculator is able to do the conversions for you, saving you time and effort! ⏱️. Simply select the correct unit in the drop down area and the calculator will do the following conversions for you: $$1,foot = 12,inches = 0.33,yards = 30.48,centimeters = 0.3048,meters$$

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"tonnage, volume, relative density, reconciliation strategy, and truck tonnage determination, sampling and assay standards. This study investigated how these measurements are conducted on Iduapriem Mine according to the mine's standard operating procedures (SOP). An improvement of documents towards a metal accounting

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Easy to calculate manually; Easy to use as a repeatable standard; When automated, reasonably fast in 2D ; Disadvantages. Local discontinuities are unrealistic; Produces biased estimates of grade and tonnage above an ore waste cut-off. Which is called the volume variance relationship i.e. the variability of the grade distribution depends on the volume of samples. Large volume samples mean small ...

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Request a drystone sample; Home; Customer support; Asphalt tonnage calculator; Share this page. Asphalt tonnage calculator . Material * Area (m 2) * Thickness (mm) * Calculate Tonnage * Required field. Tonnage: These volumes are a guide only. The tonnage given is a best estimate based on the measurements provided. Other factors can also influence the spread rate achieved on site and hence .

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How You Calculate Tonnage Of Ore Deposit? 1 Answers. Anonymous answered . A pegmatite body of length 500m,width 200m and depth of 20m,what is the tonnage of cassitterite of 8.1 specific gravity and 600ppm? Thank Writer; Comment; Blurt; thanked the writer. blurted this. You might also like... Name The Ore Of Aluminum? Chemistry. It was in 1908 in Britain that aluminum was first discovered and ...

Get Price### What is the tonnage of ore? - Quora

Do you mean, what is the mass of an ore mineral? Or what? Tonnage FACTOR (the number of cubic feet which make up one ton of ore) varies from mine to mine and ore type to ore type, and can vary even within the same ore deposit, depending on the nat...

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The sample mass may be determined by directly measuring truckloads across a weighbridge; however sub- samples will have to be taken to determine moisture content as it is impractical to measure the moisture of an entire stockpile or run of mine material. Reconciliation of tonnage mined against the mineral resource or ore reserve is also a good

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A mining company will proceed with the cost of a feasibility study generally once it has proved continuity of its ore deposits confirmed by samplings and or drilling on a relatively detailed grid that allows for fairly precise determination of tonnage, density, mineral and metal content and is that part of the orebody that economic viability has been demonstrated. A feasibility study typically ...

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tonnage milled, processed or marketed in one time period, typically a year. Thus the term reduces to a rand per ton term (exactly the same units as the rest of the terms in the equation) and is simply an additional cost attributable to each ton of ore in the same way as any other costs. So we have the result that the maximum present value of a ...

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Where samples feed into ore/waste decisions, the risks of potential economic impact must be understood. It may be the case that the results are biased and that time would be better spent on detailed geological mapping and/or more drilling. In other cases, the decisions based on grade control samples are not critical. Once a face or stockpile sample is collected, the operation has already spent ...

Get Price### tonnage calculation in mineral processing

Calculation of Ore Tonnage & Grade from Drill hole Samples. Calculate the Tonnage of the Mineral Deposit. I have created a lot of (sub)pages about the relevant terminology and working methods from the mining sector. 2010 Introduction to Mining and Mineral Processing Engineering Note - You must receive a grade of 50% or higher in at . Read More; tonnage calculation in mineral processing The ...

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Ore Reserve Estimation Tonnage Factor Basic Principles of Ore Reserve Calculation Sample Weighting Mining Dilution Calculation by Polygons Cutoff Grade Calculation . 2 Tonnage Factor The tonnage factor provides the mechanism for the conversion from volume of ore to weight of ore. In the English system, the tonnage factor is normally expressed as cubic feet per ton of ore. In the metric .

Get Price### Coal Calculations | Mining | SGS

These calculations are used to calculate various skeleton parameters including ash and calorific value that let you determine the grades of your coal. SGS global teams of chemists and experts use a range of coal analytical calculations and indexes to arrive at the calorific values, total hydrogen, Coke Reactivity Index (CRI) and Coke Strength after Reaction (CSR) of your coal sample. Our third ...

Get Price### Mining Terminology

A mining company will proceed with the cost of a feasibility study generally once it has proved continuity of its ore deposits confirmed by samplings and or drilling on a relatively detailed grid that allows for fairly precise determination of tonnage, density, mineral and metal content and is that part of the orebody that economic viability has been demonstrated. A feasibility study typically ...

Get Price### Shipping Registration and Tonnage explained

Thames Tonnage which is based, like its forerunner, on the vessel's principal dimensions and has no other legal usages and no influence either at present or historically on the tonnage measurement and calculations developed by Captain Moorsom or IMO. It is, however, a useful method of calculating marine surveyor's fees. It is calculated by: TM = (L – B)B2/188 tons.

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Bunker Calculation, Formula With Example And Sample Excel Sheet Bunker calculation having very much significance in bunkering, at times wrong calculation can lead to shortage of bunker, oil spill etc.

Get Price### Understanding Cut-Off Grade 4 (Tonnage, .

17.02.2018· Understanding Cut-Off Grade 4 (Tonnage, Grade, and Costs) or "Why is my mine losing money?" Published on February 17, 2018 February 17, 2018 • 174 Likes • 15 Comments

Get Price### Calculation of Volume and Tonnage of Ore .

For the calculation of the volume and the tonnage of ore deposits there is a variety of available methods to choose from, each suited for a particular deposit. These methods fall into two categories: reserve calculation on the basis of cross-sections and on the basis .

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NICKEL: This valuable metal doesn't usually occur in nature as a bulk tonnage target since most bulk tonnage mines contain 100 million tonnes of ore or more, and most hard rock nickel deposits ...

Get Price### Common & Basic Formulas for Mineral .

Metallurgical ContentMINERAL PROCESSING FORMULASPulp DensitiesCalculation of Circulating Load in a ClassifierCalculation of Classifier EfficiencyScreen EfficiencyMeasure Tonnage by Water Ratio (Pulp Dilution)Pulp Density TablesConcentration and Recovery FormulasTwo-Product FormulasThree-Product FormulasReagent Consumption CalculationsLiquid-Solid Relationships Specific Gravity & .

Get Price### Cut-off grade estimation - QueensMineDesignWiki

Before you can calculate the potential mineral deposit value, you first need to gather some specific data regarding the ore body and the individual drill results.. This required data can be found in the mining company's press releases in which they announce their drill results.Make sure that this data is announced according to the guidelines of National Instrument 43-101 (i.e. approved by a ...

Get Price### Calculator for weight (tonnage) of sand, gravel .

Calculate weight of sand, gravel, topsoil required by inputting area and optionally get a quote. The calculated amount of the sand, gravel or topsoil you will need is shown below (we supply our landscaping products in tonnes so our customers get exactly what they ordered). Why not get a free quote from us? Because it's direct from the quarry and we operate our own trucks (we deliver or you ...

Get Price### What is the tonnage of ore? - Quora

Do you mean, what is the mass of an ore mineral? Or what? Tonnage FACTOR (the number of cubic feet which make up one ton of ore) varies from mine to mine and ore type to ore type, and can vary even within the same ore deposit, depending on the nat...

Get Price### Ore Grade Reconciliation Techniques – A Review

The essence of ore grade reconciliation is to identify, analyse and manage variance between planned and actual results in a way that highlights opportunities. A consistent record of poor reconciliation is an indication that this variance has not been adequately managed. This would inevitably result in significant economic impact on mining companies.

Get Price### How to Calculate the Perfect AC Size - .

They are also by tonnage. One ton is equal to 12,000 BTU per hour. In India, we usually measure in tonnage. How to calculate : Area Method : To calculate, multiply the length and breadth of the room (in feet), take square-root of the answer and divide by 10. The resulting number will give the desired tonnage.

Get Price### Ore Reserve Calculation - Mining Geology - .

15.06.2018· Ore Reserve Calculation_ Part-2 - Duration: 29:59. earthscience classes official 964 views. 29:59. Grade calculations: calculate drop, given grade% and run (metric&ft-in) - Duration: 11:02. ...

Get Price### Grade Tonnage Curve: How Far Can It Be Relied Upon?

grade tonnage curve calculation which is based on a block model counts every single block irrespective of its location and relation to the neighbour blocks, i.e., without any consideration of continuity. A block or group of blocks separated from the mineable areas will still be counted and added to the tonnage totals in spite of their isolation and the fact that these will have less ...

Get Price### Calculation of Ore Tonnage & Grade from Drill .

Metallurgical ContentORE RESERVE CALCULATIONSMINERAL ORE RESERVE Case 1MINERAL ORE RESERVE Case 2MINERAL ORE RESERVE Case 3 The usual method of sampling mineral deposits is to drill holes and assay the sludge or core. Though the results thus obtained may not represent the true average value of the deposit, it is on these results that estimates of practically all .

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