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Nuestro equipo triturador puede triturar todo tipo de piedras, incluyendo granito, basalto, dolomita, piedra caliza, mineral de hierro, guijarros de río, adoquines, etc. La capacidad del equipo es de 30 a 50 toneladas/hora, más de 50 toneladas/hora, lo que puede satisfacer los requisitos de trituración de varias piedras.
BOND WORK INDEX The Bond Work Index is a factor that measures the energy consumed in size reduction operation of the ore. The Bond's Work Index equation is: W=WI* (10/√P80 -10/√F80) where W= the energy
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· Rowland, C.A., 1973, “Comparison of work indices calculated from operating data with those from laboratory test data,” Proceedings Tenth International Minerals Processing Congress, The Institution of Mining and Metallurgy, London, UK, pp.
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· With the models proposed for α, β, and γ, the Bond Work Index (kWh/t) can be rapidly estimated (less than 2 hours) and show a high accuracy for mills of non-standard dimensions (R<sup>2</sup
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· The F. Bond Pendulum crusher Carring on with a theme that we’ve already touched in the previous publication, we will consider the methodology of the F. Bond index calculating. As you know, there are
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The crusher has a feed opening gap of 25 mm, a stroke of 4.9 mm, a cone angle of 44o (in relation to horizontal) and a mantle length of 150 mm. A constant closed-side setting of 7.6 mm was used in
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· El "Indice de trabajo" es, respecto a la medida de la energía usada en la reducción de tamaño de partículas, lo que el metro es a la medida de la distancia. Es una medida estándar que lleva reduce todo circuito de reducción de tamaño de partículas a una base común de comparación.
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· The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power. Although considered an industry standard, Bond did not fully define that procedure, and therefore significant discrepancies in test results can sometimes be
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The Bond (impact) crushing work index is given as 27.7 based on a laboratory determination. Use the circuit survey data to compare the operating work index to this laboratory determination. The reported
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The Bond crushing work index test procedure is not terribly well described, and different laboratories have different procedures that can result in different results (by up to -50% +100%). I am not aware of the calibration of the test being checked in over 50 years, so it is impossible to say which procedure is "correct".
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Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond’s Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle breakage and equivalent to the work represented
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· Bond (1947) defined the impact energy per unit of thickness CB by dividing the impact energy by the thickness of each particle w, so that (1) C B = 117 ( 1-cos ϕ) / w where ϕ is the angle, w is given in mm and CB in J/mm. From this and the material specific gravity ρs (in g/cm 3) Bond proposed to estimate the crushing work index using the
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· Results and discussion. The results of determining the grindability on a sample of zeolites on fine size classes are shown in Table 3. Based on the obtained results, it was determined that the BWI for fine materials can be calculated as follows: W Fm = k ∙ W i F Fm 0.05 where in: W Fm-BWI for fine materials, (kWh/t);
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Laarmann Group B.V. Op het Schoor 6 6041 AV The Netherlands [email protected] www.laarmann.eu webshop.laarmann.eu +31 6 23 40 00 33 ond crushing work index ( Wi) The ond crushing work index (Wi) describes the competency of the ore at larger particle
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Specific energy consumption should be described with units of kWh/t and work index simply as a shorthand of “metric” or “short ton basis” or use the correct units of kW·h·t-1·μm-0.5.
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Work Index. Work Index (𝑊𝑖 ) is a parameter used to quantify the gross energy required in kilowatt hours per ton of feed needed to reduce a very large feed to such a size that 80% of the crushed product is finer than a 100 microns size. It is derived from Bond’s Law, which relates the energy required for comminution (crushing and
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With respect to the crushing work index test, F.C. Bond (1946) specifies that “In the standard method of testing only broken pieces that pass a 3-in. square opening and are retained on a 2-in. square opening are used. Slabby or acicular pieces are discarded” (p
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· A linear relationship between grindability index, G, and friability value was found as given in Eq.(2).The correlation coefficient is very high, at 0.99. (2) G = 0. 171 + 0. 021 (S 20) The relationship between friability value (S 20) and Bond work index (W i) also has a high correlation of 0.97 and this relationship is given in Eq.
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Crushing mill work index is used in the SAGMILLING.COM Bond/Barratt specific energy consumption model . The work index is used to calculate the energy requirement to break rocks in the coarse size range, from >100 mm down to about 10 mm-20 mm. Categories: Testwork. Bond work index.
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· This is or was used by Sandvik to acquire the Impact (AKA Crushing) Work Index for sizing crushers. Use this in complement to the Bond Crushing Work Index Procedure. Another Summary Table of various Impact Work Index by Rock or Mineral Type (/metric tonne). Find a referential Rod Mill Work Index Table here.
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· A Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore. It was developed by Fred Bond in 1952 and modified in 1961 (JKMRC CO., 2006). This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling, for estimating the energy required
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· Bond Work Index (BWI) versus Hardgrove Grindability Index (HGI). However it should be noted that this correlation is based on a very limited number of samples and is only applicable for the test equipment and experimental conditions used to obtain the W i and HGI values.
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· Geometallurgical modeling of the production benches is an attempt to estimate the geometallurgical variables of the different ore domains, which leads to a better understanding of the ore and its properties. Having geometallurgical variables results in a more accurate prediction of ore characteristics, an improved drilling and blasting
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Bond Work Index. The Bond work index (Bond, 1960) is based on Bond’s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger’s law. From: Advances in Clean Hydrocarbon Fuel Processing, 2011. Add to Mendeley.
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BOND'S WORK INDEX: WHAT IT IS AND WHAT IT ISN'T *Alex Doll1 and Berge Simonian2 1Alex G Doll Consulting Ltd. PO Box 1236 Logan Lake, BC – V0K 1W0 (*Corresponding author: [email protected]) 2Centerra Gold Inc. – Mount Milligan Mine 299
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· Impact Work Index Procedure. This is or was used by Sandvik to acquire the Impact (AKA Crushing) Work Index for sizing crushers. Use this in complement to the Bond Crushing Work Index Procedure. Another Summary Table of various Impact Work Index by Rock or Mineral Type (/metric tonne). Find a referential Rod Mill Work Index
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: Joshua WrightKey words: Comminution, Bond work index, Grinding, Crushing, Ball mills, Rod Mills. Theoretical efficiency In their book Process Engineering of Size Reduction-Ball Milling, Austin, Klimpel and Luckie (1984) stated that, "We have tried throughout this book to
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· crushability and grindability in the minerals industry. Although not as popular as the Bond ball mill or the Bond rod mill work indices, the impact work index, also called Bond crushability index
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Crushing Work Index (CWI) It is used to calculate actual crusher power requirements. This index describes the competency of the ore at larger particle sizes. In this test representative rock specimens in the size range-76+50mm are to Equation (4
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Responsive Multipurpose HTML5 Business Template Impact work index prediction from continuum damage model Dec 01, 2007· An impact pendulum that follows strictly Bond's standard for crushability measurement (Bond, 1947, Bergstrom, 1985, Tavares, 2007
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· PDF re separated from the ground material for experiments. The composite samples of an-desite and limestone are made from the rest, in the following ratios: limestone : andesite = 25 : 75, limeston. : andesite = 50 : 50, limestone : andesite = 75 : 25.The Bond work index determination according to the standard Bond's test is done on all these
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