rock hardness crusher work index

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  • Bond Impact Crushing Work Index -Procedure and

    2015-6-16 · P80 = 25400 x Oss x (0.04Wi + 0.40) P80 = 25400 x Css x 7Ecc x (0.02Wi + 0.70) (7Ecc 2Css) Where Oss = Open-side setting in inches. Css = Closed-side settings in inches. Ecc = Eccentric throw in inches. P80 = Aperture through which 80%

  • Ore Feed Size * Work Index Hardness: Crushing & Mill

    2015-7-29 · If you remember, the work index of the ore is a method of measuring the degree of hardness. As the ore becomes harder the fracture lines in the rock become cleaner or sharper with less crumbling of the face and edges of the mineral. These fracture lines are developed in the ore as it proceeds from one stage of production to .the next. When the ore is blasted from the earth a certain amount of fracture lines are developed in the rock.

  • crusher work index hardness classification

    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 resistance parameter. It represents the energy input required

  • Crushing Work Index for PQ Core sample Crushing

    2021-7-2 · For Crushing Work Index you need twenty rock specimens sized at -76+51 mm. The suggested core types are PQ core or large lump ore. Approximately 15 kg of sample is needed to conduct CWI test. This is the requirement for SGS, Amtec (Now ALS) and Amdel (Now Bureau Veritas) laboratories. Sachin Prakash.

  • Work Index Scale For Hardness In Rocks

    Estimation of rock engineering properties using hardness Wood Hardness Chart Species (Alphabetical) Hardness Species (by Hardness) Hardness Mahogany, Honduran 800 Padauk 1725 Mahogany, Santos 2200 Tabaccowood 1750 Maple, Hard North American 1450 Rosewood, Bolivian 1780 Maple, Ivory 1500 Bamboo, Carbonized 1800 Maple, Soft 999 Hickory 1820

  • Bond Work Index an overview ScienceDirect Topics

    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 (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of interest, or by chaining individual work index calculations using multiple laboratory work index

  • CORRELATION BETWEEN BOND WORK INDEX AND

    2014-6-27 · granite, feldspar and quartz were tested for hardness, abrasion, compressive strength and modulus of elasticity and the bond work index of these samples were estimated. The value of Bond work index of the above samples has shown a variation from 10.8 kwh ton-1 for bauxite (high abrasion value and low compressive strength) to 20.4 kwh ton- 1

  • Chapter 4 Engineering Classification of Rock Materials

    The rock unit is the basic mapping unit for the rock material field classification (RMFC) system. It is de-fined as a body of rock that is identified in the field and mapped according to measurable or otherwise describable physical properties or features at a scale useful for project analysis. A rock unit is consistent in its mineralogical composi-

  • crusher work index hardness classification

    crusher work index hardness classification. Bond Impact Crushing Work Index -Procedure and Table of. Apr 19, 2018· 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

  • work index scale for hardness in rocks Fruitful Mining

    2013-3-3 · How do you measure the hardness of a rock?. Dec 02, 2009 · Most hardness testers are for measuring metals and won’t work on rocks (yes, I’ve tried). 3 years ago; Mohs hardness

  • crusher work index hardness classification in gambia

    2020-9-23 · crusher work index hardness classification in gambia. CRUSHER WEAR PARTS Terex,8 Crusher Wear Parts Reference Guide Crusher Wear Parts Reference Guide 9 MATERIAL PROPERTIES TABLE WEAR PARTS OVERVIEW CRUSHABILITY CLASSIFICATION CRUSHABILITY BOND WORK INDEX KWHT LOS ANGELES VALUE UCS MPa Very Easy 50 0 7 27 0 90 Medium 40 50 7 10 22 27

  • Bond impact work index and abrasive

    Bond impact work index and abrasive Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Bond impact work index and abrasive, quarry, aggregate, and different kinds of minerals.

  • CORRELATION BETWEEN BOND WORK INDEX AND

    2014-6-27 · granite, feldspar and quartz were tested for hardness, abrasion, compressive strength and modulus of elasticity and the bond work index of these samples were estimated. The value of Bond work index of the above samples has shown a variation from 10.8 kwh ton-1 for bauxite (high abrasion value and low compressive strength) to 20.4 kwh ton- 1

  • R Crusher Wear Parts Reference Guide

    2018-9-15 · BOND WORK INDEX (KWH/T) LOS ANGELES VALUE UCS (MPa) The 3 main abrasives found in rock are listed below : HARDNESS OF MINERALS Some minerals are very soft; others are very hard. The hardness of a material is a major consideration in the selection of the type of crusher to use. Hardness is a factor in the amount of wear and tear crushers

  • SAG Power Index (SPI) Test SGS

    2021-7-7 · Conducted in a bench-scale comminution mill, the SPI test measures the energy needed to perform a standard size reduction and is expressed as an index. It is a measure of the hardness of the ore from a SAG or AG milling perspective. The test is a batch test, run with 2 kg of ore in a standard 10 cm diameter by 30 cm long mill, and it measures

  • USING THE SMC TEST® TO PREDICT COMMINUTION

    2020-3-24 · the crusher is in open circuit, eg pebble crusher in a AG/SAG circuit, K. 2. takes the value of 1.19. x. 1 = P. 80. in microns of the circuit feed . x. 2 = P. 80. in microns of the circuit product . M. ic = Crushing ore work index and is provided directly by SMC Test ® The coarse ore hardness parameter (S) makes allowance for the decrease in

  • Bond Tests SGS

    2021-7-7 · Wi = Work Index. The impact apparatus consists of two pendulum-mounted hammers, mounted on two bicycle wheels so as to strike equal blows simultaneously on opposite sides of each rock specimen. The height that the pendulum is raised is increased until the energy is sufficient to break the specimen. Feed Sample Requirements

  • Chapter 4 Engineering Classification of Rock Materials

    Table 4–13 Fracture type 4–21 Table 4–14 Fracturing density description chart 4–21 Table 4–15 Joint set spacing categories 4–22 Table 4–16 Aperture category 4–23 Table 4–17 Joint infilling 4–24 Table 4–18 Joint persistence categories 4–25 Table 4–19 Types of joint ends 4–25 Table 4–20 Descriptors for weathering condition of joint face rock 4–27

  • Bond impact work index and abrasive

    Bond impact work index and abrasive Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Bond impact work index and abrasive, quarry, aggregate, and different kinds of minerals.

  • CORRELATION BETWEEN BOND WORK INDEX AND

    2014-6-27 · granite, feldspar and quartz were tested for hardness, abrasion, compressive strength and modulus of elasticity and the bond work index of these samples were estimated. The value of Bond work index of the above samples has shown a variation from 10.8 kwh ton-1 for bauxite (high abrasion value and low compressive strength) to 20.4 kwh ton- 1

  • R Crusher Wear Parts Reference Guide

    2018-9-15 · BOND WORK INDEX (KWH/T) LOS ANGELES VALUE UCS (MPa) The 3 main abrasives found in rock are listed below : HARDNESS OF MINERALS Some minerals are very soft; others are very hard. The hardness of a material is a major consideration in the selection of the type of crusher to use. Hardness is a factor in the amount of wear and tear crushers

  • index hardness of limestone menuiseriefreson.be

    los angeles index hardness of limestone Crusher,Granite, This page is provide professional los angeles index hardness of limestone information for you, we have . Sigalert. Durham traffic reports Real-time speeds, accidents, and traffic cameras Check conditions on key local rout Email or text traffic alerts on your personalized rout

  • USING THE SMC TEST® TO PREDICT COMMINUTION

    2020-3-24 · the crusher is in open circuit, eg pebble crusher in a AG/SAG circuit, K. 2. takes the value of 1.19. x. 1 = P. 80. in microns of the circuit feed . x. 2 = P. 80. in microns of the circuit product . M. ic = Crushing ore work index and is provided directly by SMC Test ® The coarse ore hardness parameter (S) makes allowance for the decrease in

  • Energy considerations in compressive and impact

    2008-8-1 · The maximum operating work index was found to be almost three times larger than the minimum, and the final grinding step showed the highest operating work index. Morrell (2004) proposed a similar energy model that can be expressed as (4) W Morrell = C Morrell × p 80 g (p 80) f 80 g (f 80) where C Morrell is a constant depending on the rock

  • Bond Tests SGS

    2021-7-7 · Wi = Work Index. The impact apparatus consists of two pendulum-mounted hammers, mounted on two bicycle wheels so as to strike equal blows simultaneously on opposite sides of each rock specimen. The height that the pendulum is raised is increased until the energy is sufficient to break the specimen. Feed Sample Requirements

  • 5 Types Crushing Equipments For Sand And

    Scope of application: Rock hardness adaptability is good, generally used for crushing raw materials, medium crushing equipment needs to be miniaturized. 2. Gyratory Crusher. Advantages: large single processing capacity, low unit energy consumption, good product granularity, large and medium-sized machine can continuously feed, without feeding

  • Understanding the impact of geotechnical ore

    The crusher product PSD was fed to the grinding circuit, and A and b values were entered to the breakage function of the SAG model. The ball mill model requires a Bond Work Index (BWi) value to represent rock breakage inside the machine, and the hydrocyclone model requires entering the

  • Gouging abrasion test for rock abrasiveness testing

    2008-1-31 · Gouging Abrasion Index. Similar to the methodology for calculating the abrasiveness of the rocks reported by West (1989) for the Cerchar test, Gouging Abrasion Index (Gi) is calculated as the mean average of the wear flat diameter of the wear tools in millimeters multiplied by a factor of 10 and is determined as follows.