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 …

The Bond work index (Bond, 1960) ... The gape was 813 mm and the width of hopper 1067 mm. 90% of the ore commenced crushing 200 mm from the bottom of the crusher. The Bond index was estimated as 15 kWh/t. Assuming that the density of the limestone was 2.6 t/m 3, determine 1.

Analysis of Bond work index test results for crushing, rod milling and ball milling will indicate uniformity or otherwise of breakage characteristics in different size ranges. ... The Crusher: Selection of pebble crushers has traditionally centred on the Symons short head cone crusher. Recently, Omnicone crushers have been used with …

The present work deals with the impact crusher energy efficiency at San Andres Zeolitic Plant. ... The Bond work index is one of the most useful and interesting parameters used in designing ...

Context 1 ... that case, t a may be estimated as A*b/97.0. Figure 5 compares the values of the breakage parameter A*b and the impact (crushability) work index, which …

* Bond F. C., "Crushing Tests by Pressure and Impact", Trans AIME, Vol 169, 1947, pp 58-66. Bond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing ball mills*. Various correction factors may have to be …

The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power …

FIGURE 5: BOND ROD MILL WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS (MPa) 5 10 15 20 25 30 35 WiRM (metric) The lack of fit observed relating the crushing Work Index was expected to carry over to the other Bond Work Indices. Figure 5 displays the plot of rod mill Work Index (Wi RM) versus UCS. …

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 (Morrell, 2008). M. ia. values are provided as a standard output from a SMC Test ® (Morrell, 2004. a) whilst M. ib. values can be determined using the data generated by a conventional Bond ...

ability to work harden while crushing, which extends its wear life dramatically. • •u Liners work hardens by compressive forces and at any given time the work hardened face is only about 2-3mm. • • The speed at which the liner work hardens increases as the percentage manganese content increases; so12-14% work hardens slowest & 20-24% ...

A Bond rod mill work index test (BRMWI) is a standard test for determining the rod mill work index of an ore sample [21]. The BRMWI is a measure of the …

To predict the energy consumption during size reduction process, Bond's relationship that is expressed as following is used (Csoke et al., 2004): W = 10 W i 1 P 80 - 1 F 80 where Wi is the Bond's index (kW h/ (short-ton)), P80 is the size at which 80% of the product passes (in micron), F80 is the size at which 80% of the feed passes (in.

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 20 test runs. 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.

Bond Low Energy Impact Test. The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. The …

Mic Ore work index in crusher circuits (kWh/t) Mih Ore work index in HPGR circuits (kWh/t) P100 100% passing size or closing screen aperture (µm) ... Autogenous Grinding …

Bond's abrasion test consists of a hardened Cr-Ni-Mo alloy steel paddle (hardness 500 Brinell). 7.62 cm X 2.54 cm X 0.64 cm with 2.54 cm of its length silling inside a rotor. 11.43 cm diameter. The rotor is covered by a …

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.

Standard drop weight, SMC, and Bond ball work index tests have been conducted to investigate the comminution circuit of a magnetite ore located in Eastern Hebei, China. In addition, simulations based on JKSimMet and Morrell models have been performed to compare the specific energy consumption of various comminution circuits. …

The older Climax mine and concentrator used conventional crushing and single stage ball milling flow sheet that had the following comminution equipment installed: 3 – Primary gyratory crushers. 2 – 1.22M x 1.52M (48 x 60) jaw crushers. 14 – 2.13M (7 ft.) cone crushers. 8 – 2.74M x 2.44M (9′ x 8′) ball mills.

Mic Ore work index in crusher circuits (kWh/t) Mih Ore work index in HPGR circuits (kWh/t) P100 100% passing size or closing screen aperture (µm) ... Autogenous Grinding (AG), Ball mill, Bond Work Index (Wi), Comminution circuit, High Pressure Grinding Rolls (HPGRs), Rod mill, Semi-Autogenous Grinding (SAG), Spe-cific energy (W) 4 ...

4 - Crusher Wear Parts Reference Guide Crusher Wear Parts Reference Guide - 5 WEAR PARTS OVERVIEW METALLURGY OPTIONS JAW LINERS 18% Manganese Standard fit on all jaw crushers. ... BOND WORK INDEX (KWH/T) LOS ANGELES VALUE UCS (MPa) Very Easy 50+ 0 - 7 27+ 0 - 90 Medium 40 - 50 7 - 10 22 - 27 90 - 150

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 …

Characterization of rocks for selection of crusher can be done in different ways, and the most commonly used is Bond work index (Tavares and Carvalho 2007). Holmes (1957) proposed a modification ...

The Bond crushing work index is a measure of material strength and is determined using a simple twin pendulum apparatus and a standard procedure. The Bond impact test attempts to emulate the crushing action that occurs inside the chamber of jaw, cone and gyratory crushers, where particles may not be broken in the first nipping cycle, …

A Bond laboratory ball mill work index test was conducted using a closing screen of 150 m which gave a P80 of 108 m. A calculation is required to be carried out to estimate the specific energy ...

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 75 to 50 mm that …

Bond work indices, obtained from bench-scale or pilot plant crushability and grindability tests are used in the fol lowing Bond equation (Bond, 1960) to determine the energy …

Is VSI good choice for circulating load or over sieve product of tertiary (3rd stage) crusher. The ore has p80=18-20 mm, Bond work index Bwi=15-17 kWh/t.? How about the CAPEX and OPEX? ... working on budgeting the costs for an copper processing plant and need to estimate potential power consumption of jaw crusher? I have work index, F80 and P80 ...

Perhaps the most traditional measure of rock crushability is the Bond impact work index. Measured using Bond's standard pendulum apparatus [5], it has long been used to aid …

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.

El Probador Pendular / Instrumento de Pruebas para Work Index de Bond con Trituración de Impacto. Principio de funcionamiento Trituración por impacto. Tamaño de alimentación máximo de 76 mm. Repetición de prueba: Al menos 10, preferiblemente 20 corridas de prueba. Angulo de trituración ajustable. Resultados de trituración repetibles.

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 ...

The kinematics of the single-toggle crusher has been modelled by Oduori et al. (2015). An energy efficiency study was performed by Legendre and Zevenhoven (2014). In their study, energy was estimated with the Bond work index, and an on-line optimization algorithm was used to increase the efficiency of a laboratory crusher.

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 …

This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the other table. Source 1. Source 2. Source 3. Source 3. Source 4.

Jaw Crusher (C): A single toggle Blake jaw crusher with 22 cm x 47 cm receiving hopper crushed gold ore at the rate of 85 t/h with closed setting at 2 cm and maximum opening of 3 cm. The work index of the ore was 13 kWh/t. Assuming the SG of the ore was 5, calculate; Optimum frequency of the toggle cycle; Maximum frequency of the toggle cycle

The Work Index is actually the total work input in kwhr/short ton required to reduce from theoretically infinite particle size to 80% passing 100 microns, or to approximately 67% passing 200 mesh. Knowing the Work Index, one has but to apply the proper given equation to determine the power input required.