2020-3-13 · The distribution is on the basis of mass. What is work index of this sample? 13.4521 8.3257 37.7587 19.4387 No, the answer is incorrect. Score: 0 Accepted Answers: 37.7587 4) A material is crushed in a Blake jaw crusher such that the average size of particle is reduced from 100 mm to 20 mm with consumption of energy 10 points

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 …

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 …

2021-10-27 · The Pendulum Tester / Bond Impact Crushing Work Index Tester. Working principle Crushing by impact. 76 mm maximum feed size. Test repetition: At least 10, …

bond work index equation for jaw crusher -FDP... Rock crusher for sale,rock ... how to bond index in rock crusher - Jaw crusher ... The Bond Equation utilizing work index as the measure of grindability is an ... Read more. bauxite crushing bond work index - Rock crusher for sale ...

2016-1-10 · The wide-spread occurrence of Bond''s theory is owing to Bond''s method of ore strength assessment, that allows finding work indexes under laboratory conditions [4]. Theo-retically, the work index equals the amount of energy (kWh/t) consumed to comminute 1 t of infinite size material down to 80% content of –100 μm size grade.

2021-7-14 · A laboratory sized jaw crusher with uniform movement of the jaws, the dual pivoted jaw crusher, was used to determine the relationship between wear and work. Wear was concentrated on the jaw plates opposing each other and was measured as mass loss of the specimens.

2016-12-27 · for the Bond work index approximate value determination, which is based on the first order grinding ... The Bond Work Index is calculated using the formula: ... Andesite and limestone samples were prepared by crushing in a laboratory jaw crusher and roll crusher in a closed cycle with screening to size 100% -3.327 mm.

2020-9-24 · Wic Bond Impact Crushing Test Work Index (kWh/t) WioACT Actual Operating Bond Work Index determined from measurements on the circuit (kWh/t) WiRM Bond Rod Mill Test Work Index (kWh/t) WiSTD Standard Circuit Bond Work Index (expected or designed) used for circuit design. Specific energy requirement at the drive pinions. 3.KEYWORDS Work Index ...

2014-6-27 · The Bond''s standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80% passing 100 µm. If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work

2018-9-15 · 14 - Crusher Wear Parts Reference Guide Crusher Wear Parts Reference Guide - 15 JAW CRUSHER TERMINOLOGY JAW PLATE PROFILES There are a few key points that you need to consider when selecting the correct liners for an application: 1. Feed Material Type 2. Feed Material Hardness / Abrasiveness 3. Feed Size 4. Required Output 5.

2.2. Kinematic model The moving jaw of the crusher is suspended in the link arm at the bottom and in an eccentric bushing at the top. 115 The position of the jaw over time can be determined by

2017-2-8 · The required crushing power is a function of Bond work index, capacity and the reduction ratio. Adopting Gupta and Yan [5] the power is given by, P = Q.R d.w i where Q = crushing capacity, Rd = reduction ratio (x 1 /x 2) and wi = work index. In this work Q = .356 t/hr and x 1 = 7.5mm. A roll gap of 5mm had already been specified and x 2

2019-6-3 · moving surface of a crusher roll or jaw plate and the stationary plate surface at which point the material will be pinched. Angle varies with machine size and material lump size. Bond Work Index (BWI) — Kilowatt hour (kWh) per short ton required to reduce the material to 80% passing 100 microns. Breaker Block (Breaker Plate) — The steel anvil

2015-5-6 · grinding. 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 of Bond''s equation with the additional coefficient that depends on the properties of rock.

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...

2021-8-1 · Bond Work Index Formula-Equation Basic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack Energy The basic work index equation is: W = 10 Wi/√P – 10 Wi/√F(1) where W is the work input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the work index, or the grinding …

2021-7-26 · jaw crusher that employs the simple technology of a four bar mechanism, and design a small scale mechanized jaw crusher for crushing the stones into aggregates. This mechanism will help to evaluate its effectiveness in comparison with other different types of mechanisms in use especially the double toggle and the modified single toggle mechanism.

Bond Work Index Tests. Grinding Solutions offers a range of Bond Work Index Testing from crushability and abrasion to ball and rod mills. For more information on the tests please see below: 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.

Power used for grinding = P (kW) = 14 W 2. Determine the critical speed of the ball mill. n c = 1.472 Hz 3. Study the particle size distribution for the product and represent it by differential and cumulative analysis. Graph 3: The peak shows that the desired size of product is obtained in high quantity than as compared to others. Also around the peak the fraction of particles close to the ...

2015-4-22 · the Bond index. There is considerable difference between Bond crushing energy and work done by the jaw crusher for rocks. It appears that the Bond approach is not a suitable method for predicting single particle fracture energy done by the crusher. To verify the results obtained from DEM models, the fracture behaviour

2018-9-15 · crusher tools E.G. Jaw liners are subject to numerous pressure and impact stresses. Several other factors affect the wear lifetime of crusher wear parts as listed in below Diagram . Wear occurs in all crushers, however wear costs can be controlled by selecting the correct crusher type for the abrasive content of the material to be crushed.

2020-4-11 · 3) Explain Rittingers, Kicks and Bonds Laws along with their applications. 4) Define work index 5) Differentiate open and close circuit grinding with neat flow diagram. 6) Describe Crushing Efficiency and Mechanical Efficiency. 7) Explain principal, construction and working of Gyratory crusher.

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 ...

Grindability. by Ames. Ore grindabihty refers to the ease with which materials can be comminuted and data from grindability tests are used to evaluate crushing and grinding efficiency.Probably the most widely used parameter to measure ore grindability is the Bond work index W; The work index, Wi, is calculated kWh per ton applied in reducing ...

2021-9-21 · The fragmentation rate and particle size distribution of the muckpile after blasting have important influences on the performance of subsequent mining activities such as loading, hauling, crushing, grinding, and the overall costs of the mine. Drilling and blasting are important steps in the chain of mining processes, and its results affect the efficiency of downstream processes accordingly ...

2020-3-24 · = Coarse ore work index and is provided directly by SMC Test ® For fine particle grinding equation 1 is written as: f x f x 3. 2 b ib. 4 3 W M x x. 2 (5) where . x. 2 = 750 microns . x 3 = P 80 of final grind in microns . M. ib = Provided by data from the standard Bond ball work index test using the following equation (Morrell, 2006): ( ) M 80 ...

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