MJ series jaw crusher is mainly used as a coarse crushing crusher. Its purpose is to crush rocks into smaller particle sizes for subsequent processing in the crushing section. Because it can effectively…

MC series single cylinder hydraulic cone crusher is used in secondary and fine crushing operations. It is widely used in metallurgy, construction, highway, chemical and building materials industries. It…

Vertical shaft impact crusher is often used in the final crushing circuit. Due to the ability to produce fine-grained final products, ML series vertical shaft impact crushing equipment is very popular…

MD series multi-cylinder hydraulic cone crusher is used in the second and third stages of mineral processing and stone crushing, as well as the superfine material crushing of some rocks and ores. MD series…

In order to eliminate the phenomenon of unbalanced vibration, unstable amplitude, on/off bounce, poor screening effect, and cracking of the screen box caused by diagonal vibration in the actual screening…

MGD series vibrating feeder is designed for ultra-heavy working conditions and is suitable for feeding materials to primary jaw crushers, primary impact crushers and primary hammer crushers. It is widely…

MGB series hopper discharge feeder is mainly used for the uniform, quantitative and automatic control of under-silo feeding of bulk materials.…

MZA/K series circular vibrating screen produced by Meilan has an axis-eccentric circular vibrating screen, which can be used for dry and wet classification of materials in coal preparation, mineral processing,…

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.

Mar 10, 2020· 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 impact on such material generally is provided by using impact energy (crushing process), that is formed by collision of two oncoming pendulums.

The three types of crushers most commonly used for crushing CDW materials are the jaw crusher, the impact crusher and the gyratory crusher (Figure 4.4).A jaw crusher consists of two plates, with one oscillating back and forth against the other at a fixed angle (Figure 4.4(a)) and it is the most widely used in primary crushing stages (Behera et al., 2014).

Impact Crushing Work Index. The impact crushing work index mainly includes rotor speed and productivity. (1) Impact Crusher Rotor Speed. The calculation formula of impact crusher rotor speed is n=60v/πD, in which v refers to the linear speed of the rotor (m/s) and D …

I have a question about CWi calculation.We have an existing plant and I want to calculate the CWi based on Bond formulation and compare it with lab tests results.At the existing plant the data are:F80= 370mmP80= 10mmSpecific energy is 1,8 Kwh/tWhen we apply the …

Aug 18, 2020· As a kind of basic first rule you could say: Impact crushing is suitable for rocks with a low work index (<12) as well as low silica (<20%) and moisture levels (<5%). Rocks with these characteristics are soft and non-abrasive material, which can be broken easily within the crushing chamber while keeping wear rates at a minimum and produce high ...

* 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 applied.

Aug 01, 2008· The rock from the crushing plant needs to be reduced typically from the range 1–10 mm down to 0.05–0.1 mm in order for the flotation to work efficiently. For this size reduction, from 1 to 10 mm, down to the range 0.05–0.1 mm, wet tumbling mills are often used, in combination with hydrocyclones for size classification.

The Crusher Work Index in kWh/ton is a function of the material's impact strength and is defined by … an argillite type of rock, which has a work index of 16.5 …bond crushing work index equipment.

Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond's Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle breakage and equivalent to the work …

energy impact work index (a.k.a. crushing work index) is conducted only on coarse specimens placed one at a time in the testing apparatus. With respect to the crushing work index test, F.C. Bond (1946) specifies that "In the standard method of testing only broken pieces that …

Low Energy Impact Crushing Work Index-Crusher. Correlation Between Bond Work Index And. Effect Of Core Diameter On The Bond Impact Crushing The bond low energy impact crushing work index test is specified to be performed on rock specimens between 50 mm and 75 mm in effective diameter nqdiameter drill core frequently used in mineral exploration programs does not meet that specification …

As a basic rule, impact crushing is suitable for rocks with a low work index (<12) as well as low silica (<20%) and moisture levels (<5%). Rocks with these characteristics are soft and non-abrasive, and easily broken within the crushing chamber, keeping wear rates at a minimum, and producing high reduction ratios with a better-shaped end product.

Jan 10, 2014· Napier-Munn et al. (1996) show the correlation between A ∗ b and the Bond ball mill work index, whereas Tavares and da Silveira (2008) demonstrates that it is correlated with the Bond crushing work index (CWi) and even the Los Angeles index, more commonly used to characterize the amenability of a rock to be used in pavements. However ...

Jan 01, 2016· Bond's crushing work index of gypsum. 3.4. A sample of granite passing a 7.5 cm square opening screen was suspended in a Bond's pendulum test. The length of the pendulum was 413 mm and the mass of hammers is 13.6 kg each. The sample was completely crushed when the initial position of the pendulums made an angle of 30° with the vertical.

The low energy crushing work index laboratory test is conducted on ore specimens larger than 50 mm, determining the crushing work index (Wi C, CWi or IWi (impact work index)). The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing 12.7 ...

Bond defined a crushing work index (in kWh/t) by:53.5 B i p C CW ρ ⋅ = (7)where ρp is the particle density in g/cm 3 and CB the impact energy per particle thickness dp in J/mm for the last pendulum deflection angle Θ (in degree): The twin pendulum test has been extended by Narayanan by adding instrumentation that allows the recording of ...

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 ...

Impact Crusher Parts Impact Crushing Work Index. Impact crusher parts. the impact crusher parts mainly consist of machine body, impacting plate, plate hammer, and support and lining board. 1the machine body is composed by upper box, lower box, back upper cover, left side wall and right side wall which are connected to be an integrated part

bond work index uses in gold processing - crusher in India. bond crushing work index of copper slag ... Values of Bond crushing work index will vary from a 8 kWh/t for …

The main influence on the Si index is from the material itself, however the impact crushing action causes the material to fragment along natural lines, rather than being sheared off in a cone crusher.

Crushing Work Index Calculation Crushing Screening . The bond crushing work index test sometimes called the impact work index test is noisy and the difference you observed is perfectly reasonable the paper by angove dunne 1997 reports a standard deviation in crushing work index tests across laboratories as 45. More Details

If you used that motor to do work to 2 tonnes of rock you would have used 20kWh ÷ 2 tonne, 10kWt/h. The higher the Work Index, the more work required to break the rock, hence the harder the rock. Crushing or Impact Work Indices are measured in the laboratory using a special impact …