This is or was used by 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 …
Unconfined Compressive Strength (UCS) is a commonly used rockmass strength measurement used by rock mechanics practitioners. This paper examines potential relationships between …
The work index covering grinding in tumbling mills of coarse sizes is labelled M ia. The work index covering grinding of fine particles is labelled M ib. M ia values are provided as a standard output from a SMC Test® (Morrell, 2004a) whilst M ib values can be determined using the data generated by a conventional Bond ball mill work index test (M
Smith and Lee (1968) compared the data obtained by the standard Bond test and the data from the open grinding cycle, i.e. the first grinding cycle of the standard Bond test. Kapur (1970) came to the conclusion that the estimation of the Bond index can be performed on the basis of data from the first two grinding cycles of the standard Bond test.
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, continues to be much used for crusher selection. The ...
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*. Cone Crushers TC1000 The TC Cone Crusher provides an excellent reduction and product cubicity for the production of high quality aggregate and sub-base material.
Also remember that the products from the SMC Test® can be re-used for Bond ball work index testing, the SMC Test® being effectively used as a feed preparation step for the Bond ball work index test. As a general rule Bond ball work index tests are recommended when SMC Tests® are carried out as this provides valuable additional information on ...
mill work index rather than a ball mill index, because the industrial mill will operate over a coarser size reduction range as measured in the rod mill test, which may exhibit different grindability characteristics than would be observed at the ball mill index range. Table 2 compares the typical range of size reduction observed in grindability
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Download scientific diagram | Distribution of impact (crushing) work index for selected materials measured using the Bond pendulum (symbols: experimental data; lines: log-normal fit). from ...
The self-grinding work index is an extension of the concept of Bond work index. It generally refers to the work index calculated by using Bond's fracture theory on the principle of ore crushing energy consumption according to the W, F, and P data of a small or semi-industrial or industrial self-grinding test. In this kind of test, McPherson small self-grinding closed-circuit …
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 …
A number of methods have been used to characterize rocks for crusher selection. Perhaps the most traditional is the one proposed by F.C. Bond over 60 years ago (Bond, 1947, Bergstrom, 1985), which is still used today for characterizing material crushability in the minerals industry.The Bond crushing work index is a measure of material strength and is determined …
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 power draws of these MP 1000 …
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
Work Index values (crushing, rod mill and ball mill). Data from 11 mines located around the world is ... Figure 1 displays the measured crushing Work Index versus UCS for all mines in the data set. FIGURE 1: BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS, MPa 10 20 30 40 50 WiC (metric)
AMIRA, within project GeMIII, developed a comminution index from laboratory crusher data. The index correlated with the Bond ball mill work index and with the A×b parameter. The present work extends the use of crusher data as a grindability indicator to real-time industrial applications. The aim is to improve comminution operation using online ...
The `wic` (crushing work index or low energy impact work index) table includes the following fields: • # Specimens – The quantity of specimens tested for a particular sample. • WiC – The …
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. 47–61. Google Scholar
= Provided by data from the standard Bond ball work index test using the following equation (Morrell, 2006): ( ) M 80 ( ) 80 0.295 1 80. 80 18. 18 ib f p P Gbp p f. f f (6) ... work index than the crusher (ie the ball mill is less energy efficient than a crusher and has to input more energy to do the same amount of size reduction). Hence from ...
The present work compares, for a wide range of materials, a number of measures that have been or have potential use to describe rock crushability for selection and optimization of crushers in...
Analysis of geometallurgical data is essential to building geometallurgical models that capture physical variability in the orebody and can be used for the optimization of mine planning and the prediction of milling …
The largest size of the Run-of-Mine ore was 1000 mm. The required product size was less than 162 mm.Manufacturer's data indicated that the nearest size of gyratory crusher would be 1370 mm x 1880 mm with a cone angle of 18°. The work index of the ore was 14 kWh/t, the S.G. 4.5 and the coefficient of friction, 0.43. Calculate:
'Work Index' is the amount of energy required to do this work. It is a measurement of how hard the rock is and an expression of the resistance that a material has to crusher. Shown in the table below is typical Work Index, reflecting the different …
Mib = Provided by data from the standard Bond ball work index test using the following equation (Morrell, 2006): (6) where. ... (higher) work index than the crusher (ie the ball mill is less ...
Work Index. Work Index (𝑊 𝑖 ) 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 …
This is or was used by to acquire the Impact (AKA Crushing) Work Index for sizing crushers. Use this in complement to the Bond Crushing Work Index 911 Metallurgist is a trusted resource for practical …
Work Index Batu Kapur 10,7 kwh/ton. Work Index Batu Bara 12,5 kwh/ton. 1). Contoh Soal Perhitungan Energi Listrik Pengecilan Ukuran Jaw Crusher, Bahan galian tambang berukuran 160 mm (80% lolos) akan dikecilkan dengan menggunakan sebuah jaw crusher menjadi berukuran 40 mm (80 % lolos). Hitung berapa kwh yang diperlukan untuk peremukan satu ton ...