ball mill work inde kwh sht

Numerically, thework indexrepresents the energy (kWh/sht) ... This study aims to develop a new approach toward estimating the Bondball mill work index(BBWI) by applying a series of kinetic ...

Jun 19, 2015· This Table ofBall MillBondWork Indexof Minerals is a summary as tested on ‘around the world sample’. You can find the SG of each mineral samples on the other table.

The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (WiB or BWi).

The key factor to design size reduction units such as crushers and grindingmills, is ore’swork index. Thework index, wi, presents the ore grindability, and is used in Bond formula to ...

May 07, 2016· Incomplete Question. Please allow me to ask few question, if you can answer them you will know the price without any difficulty: 1) Application ofBall Mill2) Capacity ofBall Mill(in TPH or TPD) 3) What is theWork Indexof Material to be grou...

The Bondwork indexis a parameter which represents a measure of an ore resistance to grinding. Numerically, thework indexrepresents the energy (kWh/sht) required to reduce the material of one short ton from a theoretically infinite feed size to size at which 80 percent of material passes through sieve with square aperture100

The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index. The test is a 'locked-cycle' test where ground product is removed from test cycles and replaced by fresh feed. The test much achieve a steady-state before completion.

Numerically, the work index is the energy required in kwh/t to reduce a given material from theoretically infinite feed size to 80% passing 100 microns. The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test. Bond developed separate tests for the rod mill and the ball mill.

But, theball millhas reduced to 455 µm at the end of the same grinding period. In addition, the energy consumed by theball millfor similar fineness (5 µm) was approximately 300kWh/t energy, whereas the stirred mediamillconsumes approximately 174kWh/t energy.

BondWork Index. The Bondwork indexis not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is thekWh/t required to grind to that size. Magdalinovic [38] measured the Bondwork index…

Nov 30, 2011· F80 and P80 (in μm) are the 80% sieve opening through which 80% of the product passes (for Feed and Product respectively). wi is the Bond Work index (in kWh/sht). Once obtained the work index, the specific power consumption W [kWh/t] can be calculated using the Bond Formula: W = …

XMGQ MiniBall Millis the same as commonball mills. The materials of certain granularity and weight are placed in theball mill, and steel balls of a certain size and number are put into theball mill. Then carry out dry grinding at specific rpm, sieve and weigh products repeatedly, and obtain the grindingwork index(kwh/t) through calculation.

Dec 12, 2016· A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ¼ inch (6350 microns). The required product size...

The test determines the BondBall Mill Work Indexwhich is used with Bond’s Third Theory of Comminution to calculate net power requirements*. Various correction factors may have to be applied. W = Wi (10/√P – 10/√F) Where W = Net power consumption inkWh/t Wi = Bondwork index…

The test determines the BondBall Mill Work Indexwhich is used with Bond’s Third Theory of Comminution to calculate net power requirements*. Various correction factors may have to be applied. W = Wi (10/√P – 10/√F) Where W = Net power consumption inkWh/t Wi = Bondwork index…

TheBond ball mill work indexis one of the most commonly used grindability tests in mining, and is often referred to as the Bondwork index.. The test is a 'locked-cycle' test where ground product is removed from test cycles and replaced by fresh feed.

Jul 30, 2020· A BondBall Mill Work Indexmay also be used in the simulation and optimisation of existingmill(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 BondBall Mill Work Indextest feed.

millingchamber, and also on the particle breakage ... sphere and/or a cube located between two jaws, and theworkdone ... using standardballand rodmill, respectively, and are ..... crushabilityindexof lizenithne, 12.8kWh/tonne, the Bond.

W i – Bondwork index(kWh/t); P c ... The paper investigates the size reduction of blends of materials with different grindabilities in a Bondball mill, as well as in a continuous pilot-scale ...

Bond Work Index Tables (Wi) - Free download as PDF File (.pdf), Text File (.txt) or view presentation slides online. Here there are given tables from various sources for the Bondwork indexvalues of mining materials (ores, industrial minerals and rocks). Theseworkindexes can be used for the determination of tumblingmills(rod,ball mills) power.

Jul 31, 2014· Wm = Wi ( 80P 10 - 80F 10 ) (1) where: Wm - ismillspecific motor output power (kWh/t), Wi - is the Bondball mill work index(kWh/t), P80 - is sieve size passing 80% of themillproduct (µm), F80 - is sieve size passing 80% of themillfeed (µm), The “efficiency factors” (Rowland, 1975) modify equation 1 so that it caters for circuit ...

Exercise 1(a) 1) A material consisting originally of 25 mm particle is crushed to an average size of 7 mm and requires 20KJ/kg for this size reduction. Determine the energy required to crush the material from 25 mm to 3.5 mm. Assuming: a) Ritttingers law b) Kicks law c) Bond law 2) A material is crushed in a blake jaw crusher such that the average size of particle is reduced from 50 mm to 10mm ...

English term or phrase:Bond Mill Work index: Context: "TheBall Mill WorkIndices (BMWi) varied both between and within the deposits, but were generally moderate in the range of 7 to 12kWh/t." Je pense à "Indice du travail au broyeur à boulets"

Low energy impactworkindexes range from 6.7 to 8.5kWh/t, Bond rodmill workindexes from 12.6 to 15.5kWh/t at a discharge particle size of 14 mesh, and Bondball millindexes from 15.4 to 17.4kWh/t at a closing screen size of 100 mesh.