The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a wave-shaped design. At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill. The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work ...

Get PriceBond's approach consists of determining the ore hardness characteristics, or Work Index (Wi) via standardized laboratory testwork. The full suite of Bond comminution tests provide the Ball Mill Work Index (BWi), the Rod Mill Work Index (RWi), the Crusher Work Index (CWi) and the Abrasion Index .

Get PriceBesides particle size reduction, ball mills are also widely used for mixing, ... The basic properties of the milling bodies are their mass and size, ware rate, influence on the particle breakage rate and energy efficiency of the grinding process [15, 18, 22, 28]. A comparison between ball mils and cylpebs is made in [ 42]. The speed of rotation of the mill determines three basic types of ...

Get PriceIn conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: AG and SAG mills, Ball mills, Rod mills, Crushers, High Pressure Grinding Rolls (HPGR).

Get PriceA QUICK METHOD FOR BOND WORK INDEX APPROXIMATE VALUE DETERMINATION ... micrometers in size. According to the Bond standard procedure, the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250% circulating load (Bond, 1949, 1952, 1961). The test is performed on a raw material approximately weighing 10 kg, which .

Get PriceEquipment Sizing: Crusher or Grinding Mill. The Work Index values listed in Table I and II apply directly to a wet grinding overflow type rod mill 7.5 feet in diameter in open circuit; and to a wet grinding overflow type ball mill 7.5 feet in diameter in closed circuit with a rake classifier at 250% circulating load, and

Get PriceA mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes.There are many different types of mills and many types of materials processed in them. Historically mills were powered by hand (e.g., via a hand crank), working animal (e.g., horse mill), wind or water ().

Get Pricebond ball mill work index testwork providers - chinagrindingmill. bond ball mill work index testwork providers (11 Jun 2012) Gulin supply Mining and construction equipment for mineral handling. The crushing, screening, washing ...

Get PriceAG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill. Because of the range of mill sizes available, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill circuit. A diagram of types of AG/SAG mills [image: (135-6-5)] A diagram of types of ...

Get PriceThis Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.

Get PriceA Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(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 Bond Ball Mill Work Index test feed. Get Price. Bond Work Index - an overview ...

Get PriceBall Mill Design/Power Calculation. 2020-5-15 The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk size', product size as P80 and maximum ...

Get Price22.06.2018 · The ball milling method consists of balls and a mill chamber. A ball mill contains a stainless steel container and many small ball made up of iron, hardness steel, tungusten carbide, or silicon ...

Autor: TELL ME THATGet PriceThe standard Bond Ball Mill Work Index test procedure is firstly to stage crush the feed to minus 335mm and size a representative sample The test then involves a series of batch grinds in a standard Bond mill A Bond mill is 0305m by 0305m with rounded corners a smooth lining and runs at 70rpm The charge consists of 285 balls weighing a.

Get PriceFor every Bond Ball Mill Work Index test carried out at JKTech, a standard report is issued. The report details the Bond test procedure method, and presents the results including F80, P80, Grindability and Work Index. Further interpretation of the results is available if required. Frequently Asked Questions - Bond Ball Mill Work Index

Get PriceThe Bond Ball Work Index Test determines the resistance of ore to grinding in a ball mill expressed as a work index kilo Watt hour per ton (kWh/t). The work index is then used to calculate the specific energy requirements for sizing ball mills or determining their throughput for a target grind. Sample Requirements 10kg -3.35mm. Chat Online

Get PriceRETSCH is the world leading manufacturer of laboratory ball mills and offers the perfect product for each application. The High Energy Ball Mill E max and MM 500 were developed for grinding with the highest energy input. The innovative design of both, the mills and the grinding jars, allows for continuous grinding down to the nano range in the shortest amount of time - with only minor warming ...

Get PriceBond for 50 mm > d > 0.05 mm = ... W is the work index measured in a laboratory ball mill (kilowatt-hours per metric or short ton) P 80 is the mill circuit product size in micrometers; F 80 is the mill circuit feed size in micrometers. Rod mill. A rotating drum causes friction and attrition between steel rods and ore particles. [citation needed] But note that the term 'rod mill' is also used ...

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Auteur: Pathak PharmacistGet PriceBond (1952) found that, for the size ranges typical of ball mills, the energy per unit mass is inversely related to the product size for a constant feed size, i.e. . The material was fed to the Horomill at feed rates that varied between 1.97 and 3.71 dry tons per hour at a .

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