work index crusher

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.

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 present work shows the application of a model that combines measurements of particle fracture energies and a parameter that …

The procedure works quite well for this type of crusher but tends to understate power requirements in fine crushers where power rates are typically much higher (upwards from 0.25 KWH/tonne). ... The Bond …

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 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 ...

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 ...

capacity of crusher, 2. power consumption if the work index of the material is 12.5 kWh/t, 3. operating speed, 4. minimum level at which the feed should be maintained in the feed-hopper. 4.5. A cement manufacturer needed to produce lime at the rate of 140,000 t/year in a rotary kiln operating 360 days in the year.

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 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 …

C.1.3 Pebble Crusher Specific Energy. In this circuit, the pebble crusher feed P80 is assumed to be 52.5 mm. As a rule of thumb, this value can be estimated as 0.75 of the nominal pebble port aperture (in this case the pebble port aperture is 70 mm). The pebble crusher is set to give a product P80 of 12 mm.

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 …

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 …

The crusher has a feed opening gap of 25 mm, a stroke of 4.9 mm, a cone angle of 44o (in relation to horizontal) and a mantle length of 150 mm. A constant closed-side setting of 7.6 mm was used in ...

A crusher does not know what type of material is passing through it. The crusher does however "know" the feed and product sizes, the compressibility, the work index, the level of stickiness, and the abrasion level. With all the application variables defined, the correct type and model of crushing circuit equipment can be properly specified.

maka W = 19,5 x 10 x (1/ (500^0,5) - 1/ (150.000)^0,5) didapat W = 8,22 kwh/ton. Untuk pabrik berkapasitas 400 ton/ jam, maka kapasitas motor Mill yang harus dipasang adalah. 400 ton/jam x 8,22 kwh/ton = 3288 kW. Operation Work Index. Apa itu Operation Work Index (Wi) ? adalah suatu angka yang menunjukkan karakteristik …

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...

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 …

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 …

Keywords: Bond work index, grinding, circulating charge, composite samples * Institute for Technology of Nuclear and other Mineral Raw Materials, 11000 Belgrade, ... 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

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 …

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 …

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 ...

A gyratory crusher received iron ore from the mines at 1.5 m top size. The work index of the ore was determined as 12.5 kWh/t. The height of the bowl was 9.75 m and it was required to produce 300 t/h of crushed material at 175 rpm. Calculate the required crusher set to satisfy the crusher throughput. 5.12

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...

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 + 50mm). The …

Secondary crushers, operating work index. 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 crushers were 460+554+583+581 for a total of 2178 kW at the DCS.

The F80 values used were derived using a methodology that relates the primary crusher, close side setting (CSS) and ore hardness (Drop-Weight Index, DWi) to the primary crusher product P80 (Bailey ...

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 + …

The work index tests, developed by Fred C. Bond, are conducted in various test devices at a size range for which the material will be processed in the various crushing and grinding ranges. ... Four of the eight circuits, namely figures 7, 8, 9a and 9b, involve the use of cone crusher to produce either rod mill or single stage ball mill feed. A ...

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 is the comminution parameter that expresses the resistance of the material to crushing and grinding. In the case of the HammerMaster and LimeMaster crushers, McLanahan has designed the crusher with rotor dimensions, shaft and bearings to handle a variety of applications at a specific horsepower rating.

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 …

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 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.

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! …

Work Index of 16. Factors that markedly affect results are: • Structure of material • Compressive Strength or Crushing Work Index of material • Grading of crusher feed • Degree of pre-scalping • Choke versus irregular or low rate of feed We are pleased to examine specific applications and advise on the likely results from our machines.