(2) was tested on the results from the literature, and based on the obtained results it was concluded that the coefficient k, when determining the BWI on soft and medium hard raw materials, whose Bond working index is in the range of 10–17 kWh/t, the coefficient k is (k = 1.47), and on solid raw materials whose Bond operating index is ˃ 22 ...
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crusher work index hardness classification. Crusher Work Index Hardness Classification. equipment for crushing, grinding and classificationhe presented equipment has been earlier protected by inventors certificates and patents whose author co-author is the employee of our companyome of them are shown belowhere are also new patentshe patented equipment …
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Wearing parts in the gyratory crusher may be either chilled cast iron or manganese steel, depending on the character of the material to be crushed and the particular class of service for which the machine is intended. Standard crushers, in the small and medium sizes, are customarily fitted with chilled-iron head and concaves for crushing soft and medium …
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'Soft' minerals are 1 to 3, 'medium' are 4 to 6 and 'hard' are 7 to 10. However, the hardness value is entirely arbitrary, it is merely a ranking of the described minerals. The table also includes the …
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3.1.1 The rock may be classified as hard ( more than 800 kgf/cma ), medium hard ( 300 - 800 kgf/cma ) and soft ( less than 300 kgf/cm* ). The rock may also be classified on the basis of work index and abrasive index. 3.2 Crushability The force require& to break the rock into
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6 L.M. Tavares & M.A.C.W. da Silveira The Bond work index has also been used, in conjunction with empirical relationships, to estimate capacity factors of jaw, cone and gyratory crushers
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Ore hardness can be estimated using commercially available standard techniques such as the SAG Power Index (SPI), Bond Work Index (BWI), and JK Drop Weight (JKDW) tests (Bailey et al., 2009 ...
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Three Bond work index tests are commonly used in the industry. This essay discusses some observations from SAGMILLING database of published grindability results about relationships, and lack thereof, between the Bond comminution tests. A further comment is made about the Bond abrasion index a…
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Bond impact crushability work index (CWi) (Bond, 1963) results reported for iron ores vary from hard iron ore (17.7 kWh/t) to medium hardness iron ore (11.3 kWh/t) and friable iron ore (6.3 kWh/t) (Table 2.11; Clout et al., 2007).The CWi for hard iron ores typically overlaps with those reported for BIF ("taconite") iron ores while the range in values in Table 2.11 covers that for …
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A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s). Sample requirements: A minimum of 8 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample to minus 3.35 mm, as required for the Bond Ball Mill Work Index test feed.
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• Bond Ball Mill Work Index (Crushed Feed) • Specific Gravity (part of the SAGDesign test). The results from this work are presented below and are discussed in this …
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The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. ... Gold Shaker Tables; Fine Gold Recovery; Crushers. Jaw Crushers; Roll Crushers; Cone Crushers; Laboratory Crushers; Classification. Hydrocyclone Manufacturers; Grinding. Ball Mills; Hammer Mills ...
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sbm crusher work index hardness classification 26435Bond Impact Crushing Work Index Procedure and Table of. Apr 19,2018.Bond Impact Crushing Work Index Procedure and Table of Crushability.I consider Sagmilling the go to place for hardness testing management.16th,2015 Categories: Concentrator Manuals Procedures,Crushing.
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The most widely used parameter to measure ore hardness is the Bond work index Wi. Calculations involving Bond's work index are generally divided into steps with a different Wi …
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The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the required open-side settings (jaw crushers and gyratory crushers) or …
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It provides information on rock classification ... when a pebble crusher is used. Screening at 5 mm ensures that the T80 will be about 10 mesh (1.7 mm) ensuring that the ball mill will work efficiently. ... Ball Mill ore hardness, Bond Ball Mill Work Index of SAG ground ore, kWh/t: Crushed Bond BWi testing gives a slightly different result. The ...
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The Rock Abrasiveness Index (RAI), introduced in 2002, is often used to categorize abrasiveness. ... QJ331 Jaw Crusher Crusher Classification. As discussed in our article ... Here we present the major types of crushers and how they work. Jaw Crusher. A jaw crusher is the most commonly used primary crusher. It uses simple technology to ...
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Hardness: Hard materials like granite and basalt are suitable for jaw crushers or gyratory crushers, while softer materials like limestone and coal can opt for impact crushers or hammer crushers. Abrasiveness: Materials with high abrasiveness like iron ore require crushers with good wear resistance, such as cone crushers.
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ical work to optimise ore routing, better hardness control, and forecasting of problem minerals, such as reagent consumers ... Bond Crusher Work Index Bond Abrasion Work Index Bond Ball/Rod Mill Indices ... VRM Dynamic Air Classification FTM VXP * Licensed to conduct this test work at our facility, data is interpreted and results reported by ...
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A cone crusher makes quick work of medium to hard materials, but it doesn't do well with softer ones. In particular, moist or viscous materials such as clay aren't suitable for this style of machine. ... has introduced the new Z3 series of medium-size class development jumbo drills and bolters to its lineup, further broadening the ...
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General guidelines for classification of waters are: 0 to 60 mg/L (milligrams per liter) as calcium carbonate is classified as soft; 61 to 120 mg/L as moderately hard; 121 to 180 mg/L as hard; and more than 180 mg/L as very hard. ... dam machine work; crusher work index hardness classification; limestone bond ball mill work; bond method for ...
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These crushers work with the impact effect of the hammers according to the formula for the kinetic energy or impact (P): P= (m. ... Depending upon the hardness of the crusher feed, the specific wear of the impact hammers is 1.5 to 3.0 grams per ton of crushed material. ... Hammer Crusher classifications : hammer crusher can be classified into ...
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The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. The test determines the impact energy at which a specimen fails and allows approximation of net power requirements for sizing crushers. The open and closed sized settings for given product sizes can also be determined.
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Still another 48 by 42 inch, 4 pieces sectionalized frame crusher is reducing very hard, abrasive iron ore in an upstate New York mine, preparatory to concentration. CRUSHERS—in sizes from 36 by 25 to 60 by 48 inches—are giving these and other operators more for their money more capacity; more crusher life; more satisfaction!
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This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore …
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Bond's work index is one of the mostly widely used metrics of mineral grindability. In spite of its ubiquity, users are often not aware of the nuances of the work index family: what are its …
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The work indices are important for determination of crushing energy requirements and the abrasion index is important for estimating equipment metal wear and grinding media consumption. The hardness according to Mohs scale of Gibbsitic and Boehmitic bauxites are typically 1–3, while it ranges from 6½–7 for Diasporic bauxites .
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The capacity range of primary crushers varies depending on the type of crusher and the size and hardness of the material being crushed. Generally, primary crushers have a capacity range of between 1,000 and …
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FIGURE 8: ROD MILL/BALL MILL WORK INDEX RATIO v. UNCONFINED COMPRESSIVE STRENGTH 100 200 300 400 UCS (MPa) 0 0.5 1 1.5 2 WiRM/WiBM (metric) Siddall et al (1996) identified the ratio of Bond rod mill Work Index and ball mill Work Index as being indicative of an ore's compentency. Figure 8 plots this ratio versus UCS; no trend is apparent ...
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