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Mar 02, 2010· The Instantaneous Stripping Ratio (ISR) is the stripping ratio for a given push back, where a tiny slice of material, i.e., ore and/or waste, is removed from a pit wall. This section presents the ISR calculation for a steeply pitching deposit. Assume an idealized tabular and steeply pitching orebody that outcrops at the surface and dips to the ...
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For an absorption column, is the bottom stage. For a stripping column, is the top stage. = gas flow rate on a solute-free basis (mol gaseous carrier time -1) = mole fraction of solute in liquid phase (mol solute/mol total liquid) = mole ratio of solute in liquid phase (mol solute/mol liquid absorbent) = mole ratio of solute/absorbent in liquid entering the top of the …
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Dec 27, 2018· The first range is given by the break-even stripping ratio open pit-underground and the minimum safety factor allowable (SF = 1). This sets the minimum angle at 35° and the maximum at 65°. The second range is set by the mine recovery factor. The minimum value is determined by the lowest desired ore recovery of 80%.
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Effect Of Stripping Ratio In Coal Mining - Know More. Coal Mining Stripping Ratio BM Garden What is a stripping ratio with picture wisegeekJun 30, 2019 the stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process in relation to its application in the mining of ore, the utility of the …
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Sep 16, 2022· current siguiri mine mining stripping ratio. Stripping ratio Stripping ratio. In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is
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The ratio of the total volume of waste to the ore volume is defined as the overall stripping ratio: R = volume of waste removed to depth d volume of ore recovered to depth d The Instantaneous Stripping Ratio (ISR) is the stripping ratio for a given push back, where a tiny slice of material, i.e., ore and/or waste, is removed from a pit wall.
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Distillation Packed Column Depth. = height of equivalent theoretical plates. (length) = local slope of equilibrium curve/local slope of operating line. (24.1) Example. We aim to distill benzene and toluene to a distillate that contains 95 mol% benzene and a bottoms stream that contains 95% toluene. The feed stream is 100 kmol/hr of an equimolar ...
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Energy resources: Coal. ... Figure 28me of the geological factors that influence coal-mine planning and reserve assessment. The stripping ratio for the two seams in Figure 28 is less than 7:1 for most of the area to the NW of the fault: the two seams there are economic for surface working and can be considered as reserves.
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Other articles where stripping ratio is discussed: coal mining: Choosing a mining method: …calculated with the aid of stripping ratios, which represent the amount of waste material that must be removed to extract a given amount of coal. Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total cost of …
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This paper represents an attempt to examine the effects of Cutoff Grade (COG) and Stripping Ratio (SR) on the Net Present Value (NPV) for the proposed gold mine in Hamama area, hence to attain best operating condition corresponding to the optimum COG and SR in the proposed gold mine. Discount Cash Flow (DCF) model has been …
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In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be handled in order to extract some volume of ore. For example, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock. Stripping ratios are typically reduced to show the volume of …
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5.2.2 Effect of Stripping Agent Types and Concentration. The type of stripping agent plays an important role in silver recovery and minimizing the co-transport of water in the extraction process. Its concentration as well as the internal phase volume fraction cannot be changed or increased. indefinitely.
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For an absorption column, is the bottom stage. For a stripping column, is the top stage. = gas flow rate on a solute-free basis (mol gaseous carrier time -1) = mole fraction of solute in liquid phase (mol solute/mol total liquid) = mole ratio of solute in liquid phase (mol solute/mol liquid absorbent) = mole ratio of solute/absorbent in liquid ...
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Answer (1 of 3): For under standing, you may think of partial pressure in gas phase as analogous to concentration in liquid phase. As you can reduce concentration of sugar solution by adding water, you can reduce partial pressure of a hydrocarbon species by adding steam in the system. Mathemati...
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Jul 06, 2022· PB also had the significant effects on regulating water use of oats weather or not super absorbent polymers were applied, it significantly increased the precipitation ratio by 2.64% (PBY) and 2.13% (PBN) and decreased irrigation ration by 3.32% (PBY) and 5.28% (PBN) on average in two years.
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May 19, 2021· In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is mined per unit of ore. Whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight.
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Explosives and Blasting in Open Cast. Whittle Introduction Tutorial. ... 4.1. 13.Stripping Ratio Considerations y Fig.1. Overall stripping ratio representation .. ... the overall mining plan and overall stripping ratio can change over the total life of any mine. Having determined the final pit limits and overall stripping ratio. it is necessary ...
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4/4/2016· Stripping ratio simply refers to the amount of waste handled in order to recover certain amount of ore. It is mathematically expressed as the ratio of waste to ore. However a wide variety of units are used as well as indicated below: Hence the maximum allowable stripping ratio at pit limit is given as: Know more
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