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% +). ... Recently I was dealing with a crusher vendor and they were also reluctant to rely on the crusher work index results we had from the client side. I ...

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 …

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 Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. ... The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits. The test requires a minimum of 10kg of sample that has been stage-crushed to passing size of <3.35 …

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...

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...

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.

The springs are helical and pressure varies with the size of crusher and could be as high as 6 t/m (about 8300 kPa). In some roll crushers the rolls are individually driven. ... [21] indicated that the Bond work index is not exactly a constant factor for a given ore. Otte [5] reported an increase of W i from 13.9 to 15.6 kWh/t for a copper ore ...

Bond ball mill work index (BBMWI) test is a standard test used to measure the ball mill work, which is calculated in accordance with the procedure proposed by the Bond [21]. ... The Bond low-energy impact test calculates the actual crusher power requirements. The crushing work index (CWI) is calculated as follows (Eq. Error! …

The primary rock breaker most commonly used in large plants is the gyratory crusher, of which a typical section is shown in Fig. 5. It consists essentially of a gyrating crushing head (521) working inside a …

A cone crusher model is presented that uses the familiar "population balance" framework. The model was fitted so that the product particle size distribution can be predicted when operating at the minimum crusher gap CSS. A previously developed energy model is applied to the particle size distribution that is the output of the breakage …

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN; Use Add New Topic to ask a New Question/Discussion about Crushing.; OR Select a Topic that Interests you.; Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.; …

To evaluate the work index they considered the maximum size in the feed and also the maximum size of particles in the discharge from the crusher. To determine the size …

1.. IntroductionA 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 …

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. ... Modified Bond method for the evaluation of crusher efficiency. Min., Metallur. Explor., 6 (1989), pp. 14-17, 10.1007/BF03402519. View in Scopus Google …

Ball Mill Bond Work Index For Limestone | Crusher … Find Ball Mill Bond Work Index For Limestone on the web, the site is foucs on mining equipment tech. iron ore crusher selection criteria work index grindability ... Example 7-1 An ore with a grindability index = 13 is ... gold ore crusher, iron ore crusher, limestone ... Test Method for ...

This is the reason that the size of the electric motor for a primary crusher, that has a production rate of five hundred tons per hour, is so much smaller than the horse power of a rod mill that can only grind three hundred tons per hour. In the harder ore there are less of these fracture lines created with each size reduction.

The work index can be used to evaluate the influence of various operating variables on crushing efficiency. For an industrial crushing process with a given feed …

Impact Work Index Procedure. 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 Work Index by Rock or Mineral Type (/metric tonne). Find a referential Rod Mill Work Index …

Preparation of Test Feed Sample for Bond Work Index Procedure: Riffle 8-10 kilograms of minus half an inch feed into 500 gram charges. Riffle one 500 gram charge of ore down to splits of 125 grams each. Record the exact weight of one split; identify it as Feed No. 1. Wet screen through a 150 mesh screen.

The present work deals with the impact crusher energy efficiency at San Andres Zeolitic Plant. Varying the operational parameters levels (rotor velocity, hammer row number and crusher capacity ...

Crushability work index. Nomenclature. A. cross-sectional area of the impact load cell rod (m 2) C. wave propagation velocity in the ILC rod (m s −1) CB. impact …

As you know, there are three calculation methods. The method selection depends on the crushing/grinding stage (the power size and the necessary finished class). The crushing work index ( CWi) is an indicator characterizing the energy amount (kW * h / t) needed to destroy single pieces of material with a relatively large size range (-75 + …

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. …

Cone crusher Cone crushers CC100 CC200 CC400 CC300 MHP400 MHP500 / top of page. MOORE WATSON LTD. Consultancy, design and manufacture of mining, mineral processing and recycling equipment ... material crushing work index (Wi), feed particle size composition, circulating load, and moisture in the feed will affect the crusher's ability, so …

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.

The five types of Work Index Nov 11, 2022 Software for grinding circuit design Jul 12, 2022 Bond BWi P100-P80 relationship Dec 6, 2021 SMC Test parameters from A×b ...

Work index is the relation between the SEC and the amount of breakage in an ore. The most common form of this relationship is given as Equation 1, and is often referred to as …

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 commonly used grindability tests included in the database are the Bond work indices for ball milling, rod milling and crushing; the drop weight test results A, b, A×b, DWi, Mia, Mic, Mih and ...