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A strip ratio, or stripping ratio, is an important measurement related to the open-pit mining process. It represents the amount of waste material, also known as overburden, that must be moved in ...
stripping ratio This term is usually defined as the inverse ratio to the distribution ratio, i.e. in aqueous-organic systems the aqueous... The term stripping coefficient is not recommended.
The maximum allowable Stripping Ratio (SR max) defines break even stripping ratio (BESR).This represents the highest possible units of waste that can be handled. If the SR exceeds the BESR then the operation will be uneconomical as the income generated by the ore is insufficient to offset the costs incurred in mining.
The stripping ratio is commonly used in the ore and coal mining processes. Stripping ratio is a term that is derived from the mining industry and is used in reference to the open-pit mining process. The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process.
Read Paper. CHAPTER 8 Stripping Ratios, Pit Limits Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 2014 f Stripping Ratios The stripping ratio (SR) refers to the amount of waste that must be removed for a given quantity of ore in open pit mining. It is most commonly expressed as Waste (tons) SR Ore (tons) A wide variety of other units are used as well.
Stripping Ratiois the ratio of a unit of waste material removed per similar unit of ore material removed. Toeis the base of a bank bench or a slope. Waste Dump is a place were waste materials are piled. Important Terms for Underground Mining.
4.17 Stripping Ratio Stripping ratio is ratio of excavation of overburden to ore. Generally overburden is measured in cubic metres and ore in tonnes. Therefore, the Stripping ratio is equal to Volume of overburden (m3)/ Weight of ore (in tonnes). 4.18 Standard stripping ratio this is the ratio between the total quantity of overburden
Strip ratio The ratio of tonnes removed as waste relative to the number of tonnes of ore removed from an open-pit mine. For example, a 31 stripping ratio means that mining one cubic metre of ore will require mining three cubic metres of waste rock.
For a stripping column, is the top stage. generic stage number. gas flow rate (mol total time -1) 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 absorption column.
stripping and enriching sections. Let q be the ratio of the moles of saturated liquid in the feed to the total amount of feed then F qF (1 q)F (4.4-8) L L qF L L qF (4.4-9) V V (1 q)F V V (q 1) F (4.4-10) The magnitude of q is related
Apr 04, 2016 The maximum allowable Stripping Ratio (SR max) defines break even stripping ratio (BESR).This represents the highest possible units of waste that can be handled. If the SR exceeds the BESR then the operation will be uneconomical as the income generated by the ore is insufficient to offset the costs incurred in mining.
Company cut costs by 12% despite rise in stripping ratio (6.1 from 5.8). RMG - KTK reports 1Q financials, May 23, 2013. The average stripping ratio of the current open-pit mines is 1.5-2.0 m.sup.3/t but is expected to go above 4 m.sup.3/t in the near future. Emerging technology changes for CIL.
Stripping Ratios, Pit Limits Cutoff Grade Optimization. F. Barcelonistas. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. ... Maximizing the net present value by applying an optimal cut-off grade for long-term planning of the copper open pits. By Daniel Krzanovic.
The equilibrium relation is frequently given in terms of the Henrys law constant which can be expressed in many different ways PA HCA mx A Kx A (5.2-7) In this equation, PA is the partial pressure of species A over the solution and CA is the molar concentration with units of mole/volume. The Henrys law constant H and m have units of
For an absorption column, is the bottom stage. For a stripping column, is the top stage. gas flow rate (mol total time -1) 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 ...
Because stripping is not perfect, recycled absorbent contains solutes (absorbates) Absorption Factor Stripping Factor Absorption factor, A L/(KV) Component A K-value Water 89.2 0.031 Acetone 1.38 2.0 Oxygen 0.00006 45,000 Nitrogen 0.00003 90,000 Argon 0.00008 35,000
Strip - To remove the overburden or waste rock overlying an orebody in preparation for mining by open pit methods. Stripping Ratio - The ratio of tonnes removed as waste relative to the number of tonnes of ore removed from an open-pit mine. Sulphide - metalliferous minerals formed with sulphur and often iron.
Description. The loss of bond between aggregates and asphalt binder that typically begins at the bottom of the HMA layer and progresses upward. When stripping begins at the surface and progresses downward it is usually called raveling.. Although the displacement of asphalt on the aggregate particle surface by water (stripping) is a complex phenomena and is not yet fully understood, mineralogy ...
Rectifying Stripping Column Energy Reflux column column Energy use diameter ratio ratio stages stages (BTU/lb.) (in.) in/out----- 2.5 10 16 1540 5.0 .15 3 8 7 1760 5.3 .17 3.5 8 5 1980 5.7 .19 4 7 5 2200 6.0 .21 5 7 4 2630 6.5 .26 6 7 3 3070 7.1 .30 8 6 3 3950 8.0 .38 10 6 3 4830 8.9 .47 -----
A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.
Calculating Stripping Ratios for Area Strip Mines Mnge 315 Dr. B. C. Paul spring 2003 revised 2010 Note These notes contain information considered common knowledge to those familiar with Strip Mining. Books such as Elements of Practical Coal Mining and SMEs Surface Mining were specifically referenced fStripping Ratio as a ...
Feb 05, 2014 The standard ratio of a frame is 1.851 (more commonly known as 169). Or to put it in different terms, for each inch of vertical height, a frame gains 1.85 inches of horizontal length. If you intend to draw a storyboard, either as practice or for whatever
Binder A strip of cardboard, thin wood, burlap, or similar material placed between layers of containers to hold a stack together. Blanket Order See Blanket Purchase Order. Blanket Purchase Order A long-term commitment to a supplier for material against which short-term releases will be generated to satisfy requirements. Oftentimes, blanket ...
stripping ratio - Encyclopedia - The Free Dictionary Work is being completed on identifying areas of high quality coal that can be accessed by a low stripping ratio and
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 31 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 waste removal required to ...
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 producing and
See distribution ratio Notes 1. This term is usually defined as the inverse ratio to the distribution ratio, i.e. in aqueous-organic systems the aqueous phase concentration of solute is the numerator and the organic phase concentration is the denominator. Their usage should be clearly defined. 2. The term stripping coefficient is not ...
Apr 22, 2004 English term or phrase the waste to ore stripping ratio Finally, after further discussions with XXX on the subject of maximizing grades in the early years of the project, YYY revised the mining schedule, to examine the effect of higher-grade ore being mined earlier, from pit S1 where the waste to ore stripping ratio is also lower.
1 ACI Concrete Terminology A/F ratio the molar or mass ratio of aluminum oxide (Al 2O 3) to iron oxide (Fe 2O 3), as in portland cement. Abrams law a rule stating that, with given concrete materials and conditions of test, the ratio of the amount of water to the amount of the cement in the mixture
Nov 09, 2019 Keeping track of shipping terminology is crucial as these terms play a fundamental role for everyone involved in the shipping process. By understanding important terms, you can avoid misunderstandings and minimise errors in the supply chain. Now, let us have a look at some of the most commonly used shipping terms that every shipper should know. 1.
waste cost/ton stripping pit Open ore cost/ton mining pit Open-ore cost/ton mining d Undergroun BESR $0.35 $0.30-2.00 4.86 tons waste1 ton ore Only that part of the orebody where the stripping ratio does not exceed 4.86 tons waste 1 ton ore should be mined by open pit methods. For this reason it is necessary to update the long-term plan of the mining project at regular intervals.
Distillation is a process by which a liquid mixture is separated into fractions with higher concentrations of certain components by exploiting differences in relative volatility. In industrial settings such as oil refineries and natural gas processing plants this separation process is undertaken using a distillation column. This article describes the basic principles and operation of a ...
Basic Electrical Terms and Definitions. Understanding electricity requires knowledge of these basic electrical terms. Alternating Current (AC) An electric current that reverses its direction many times a second at regular intervals. Ammeter An instrument for measuring the flow of
Jul 26, 2017 Stripping ratio is expressed broadly as the ratio of waste to ore. Its simply calculating how much waste has to be removed to expose how much of ore to be mined. Stripping ratio determines where the pit limit will be. There are basically three (3) forms of stripping ratios. The overall stripping ratio (average stripping ratio), the maximum ...
Mar 02, 2010 3.2.5 Instantaneous Stripping Ratio. The stripping ratio (SR) refers to the amount of waste material that must be removed for a given amount of ore. 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.