Download scientific diagram | Correlation of crushing work index and drop-weight index. from publication: What can go wrong in comminution circuit design? | | ResearchGate, the professional ...
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 …
This permits us to determine the efficiency of power utilization in crushers and to predict the product size distribution which will arise from operating crushers at different power rates. The Bond Work Index figures obtained by backcalculation from the pendulum data are compared with the Net Work Index values obtained from the plants …
The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial ...
Test Procedures for the Characterization of Crusher Performance. The Bond Impact Work Index method has been an industry standard for the determination of crusher power requirements but was originally developed to ensure, that sufficient power was connected to primary gyratory crushers.
The low energy crushing work index laboratory test is conducted on ore specimens larger than 50 mm, determining the crushing work index ( WiC, CWi or IWi (impact work index)).
An impact pendulum that follows strictly Bond's standard for crushability measurement [5, 32, 33] has been used, which allows calculating the crushing, or impact, work index. The test consists of dropping two pendulum-mounted hammers simultaneously, each weighing 13.6 kg, against individual particles of size ranging from …
Bond Crusher Work Index Bond Abrasion Work Index Bond Ball/Rod Mill Indices ... machine is used for all initial HPGR lab-scale test work. The pilot-scale crusher is designed to process ore in the identical ... A pendulum grinding test in this mill determines the residence time
The Bond Crushing Work Index (CWI) describes the competency of the ore at larger particle sizes. It is used for the calculation of the actual crusher power requirements. Pendulum mounted hammers with scale.-Test: At least 10 specimens preferably 20 specimens to be tested.
Distribution of impact (crushing) work index for selected materials measured using the Bond pendulum (symbols: experimental data; lines: log-normal fit).
The Pendulum Tester / Bond Impact Crushing Work Index Tester. Working principle Crushing by impact. 76 mm maximum feed size. Test repetition: At least 10, preferably …
The three tests are: The Bond ball mill work index (Wi BM, or BWi) conducted from a feed size of approximately 2 mm to a product size on the order of 100 …
It is not recommended to use UCS as a proxy for the Bond crushing work index, or vice versa. If you insist on doing so, there are several potential regression equations above that you may choose ...
The Bond Work Index (Wi) is a common technique for the estimation of hardness and energy requirement for comminution using ball mills. ... Ores for the work index test: a) type and b) feed size ...
bond crusher work index pendulum test. 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 openside settings (jaw crushers and gyratory crushers) or closedside settings (cone crushers) …
The Standard Autogenous Grinding Design (SAGDesign) test measures macro and micro ore hardness by means of a SAG mill test and a standard Bond ball mill work index test on SAG ground ore. Ore feed is prepared from a minimum of 10 kg of split diamond drill core samples by stage crushing the ore in a jaw crusher to 80% product passing 19 mm.
The Bond Abrasion Index, devised by F.C. Bond in the 1940's, quantifies the abrasivity of an ore. The index can be used to calculate metal wear rates in crushers and ball consumption rates in ball mills.
The height of the pendulum is raised until the energy is sufficient to break the specimen (Bond, 1947), and then the crusher work index (CWI) or impact work index is calculated.
An impact pendulum that follows strictly Bond's standard for crushability measurement (Bond, 1947, Bergstrom, 1985, Tavares, 2007) has been used, which allows calculating the crushing, or impact, work index.The test consists of dropping two pendulum-mounted hammers simultaneously against individual particles of size ranging from 75 to 50 mm ...
Understanding your ore's variation of work index by size is particularly useful for SAG mill troubleshooting and production forecasting. Examples of the variation in work index at …
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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 …
Bond pendulum test, ... However, the Bond work index (TEST) so determined has to be corrected for conditions encountered in industry that differ from the above conditions. Bond defined eight correction factors. ... Also given are their breakage characteristics as obtained from an impact crusher. The work indexes of ores were …
The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the r…
The work index equation for a ball mill test was generated by Fred Bond to empirically predict the operating work index of an industrial ball mill (8 ft dia by 8 ft effective grinding length ...
The middle size class, represented by rod milling, is fitted to a tumbling test, referred to as the Bond rod mill work index (Wi RM, or RWi). The apparatus used to determine this work index was described in 1943 by Bond & Maxton.
The Thirty-nine samples were submitted for the Crusher Index (Ci), SAG Power Index (SPI®), Standard Bond Ball Mill Work Index (BWI) and Modified Bond Ball Mill work Index (MBI) tests. The Ci, SPI® and Bond Wi values of these samples show a good indication of ore hardness variability within the ore body.
crusher and roll crusher in a closed cycle with screening to size -3,327mm. The samples of pure andesite and pure limestone are separated from the ground material for ... – Bond work index (kWh/t); P c – test sieve mesh size (µm); G – weight of the test sieve fresh un-dersize per mill revolution (g/ob); F 80
The traditional Bond work index proposed by F.C. Bond over 60 years ago is still today a useful tool for characterizing material crushability and grindability in the minerals industry.
Introduction Bond's work index model of quantifying mineral grindability was born out of the desire for a better way of scaling up laboratory grindability test results to industrial-scale grinding mills (Lynch & Rowland, 2005).