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The Bond rod mill work index (Wi RM, or RWi) conducted from a feed size of approximately 10 mm to a product size on the order of 1 mm. The Bond crushing (impact) work index (Wi C, CWi, LEIT or IWi) conducted on specimens of a nominal dimension between 50 mm and 75 mm. The product size is not relevant to this test; it is a determination of the ...
rod mill work index has not been de ned as yet. The ball fi mill work index is con rmed at 16 kWh/t. The operating fi work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high ineffi ciency. This raises the point that, in some cases, the Bond EF4 .
Milling – Rod / Ball Mills including Bond Ball Work / Grindability Index . MARC manufactures a wide range of ball and rod mills to suit most metallurgical laboratory applications. Our range extends from small 6L jartype mills that are manually positioned on rollers to large 30L size mills.
The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a waveshaped 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 mm whereas Ball Mill Work ...
* Bond F. C., "Crushing Tests by Pressure and Impact", Trans AIME, Vol 169, 1947, pp 5866. 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.
Bond Ball Mill Work Index, BWi, kWh/t Bond Rod Mill Work Index, RWi, kWh/t Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on profitability.
The Essa® ball and rod mill range includes: Essa® BM Series Laboratory Ball Mills – ideal for producing finer particles. Available in L, L and 21 L barrel volumes. Essa® RM Series Laboratory Rod Mills – suitable for larger and more coarse materials. Available in L, .
A 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 mm, as required for the Bond Ball Mill Work Index test feed.
The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by Bond This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills.
Bond Rod Mill Work Modified The standard bond rod mill work index test procedure is firstly to stage crush the feed to pass 127 mm and size a representative sample the test then involves a series of batch grinds in a standard bond rod mill a bond rod mill is 0305m by 0610m with wave liners of a form described by bond which runs ...
We have bond ball mill work index database jktech,available in the database of parameters on record with JKTech determined for individual ore bodies and breakage tests have been available some time from the batch wise original Bond Work Index tests to the new multiparticle test Shi et al 2008 Tests for particle Ball mill work index kWhmt Sg
The Bond rod mill work index is not as common as the Bond ball mill work index, and there are two different variations on the mill models expect a mill with a "wave liner", and is not compatible with mills using "smooth liners".
The design of rod and ball mills is still carried out with the Bond ball mill and rod mill grindability tests. As discussed earlier in this paper, it is important in this case to match the reduction size of the test to that desired from the industrial mill. As such, primary ball mills should be designed with the rod mill work index, and single ...
Essa Bond ball rod mill work index, abrasion index, impact test. bond ball mill work index testwork providers bond ball mill work index testwork providers (11 Jun 2012) Gulin supply Mining and construction equipment for mineral handling. The crushing, screening, washing ...
Bond Rod Mill Grindability Test. Grinding Solutions can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill. The test requires a minimum of 20kg of material. Closing screen sizes typically range from to 212µm. Abrasion Index Test
An error analysis of the Bond rod mill work index is performed. A first source of error is the representativity of the sample used for the test, estim.
Apr 27, 2016· A "Bond" rod mill work index is to be determined in an apparatus with a wave liner. The author is aware of four laboratories that offer a rod mill work index test where the lining of the mill is either smooth, or smooth with a small number of primitive lifters that do not constitute a wave liner (one of
The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. Bond developed the following correlations based on the wear rate in pounds of metal wear/kWh of energy used in the comminution process. Wet rod mill:
Essa® Bond TestWork Equipment; Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index and the Bond rod mill work index. These are empirical indices determined by close circuit grindability tests developed by in the mid 1930''s.
Bond Work Index Energy equation Grinding . You need a two stage solution first stage open circuit mill and then second stage closed circuit mill First stage will be broken into two parts as well you use a Bond rod mill work index for the coarse component of the ore 2 1 mm and the Bond ball mill work index for the fine component 1 mm . Get more
Bond rod mill standard test. Standard conditions for determining the work index of rod mills under laboratory conditions are: mill size = 305 mm (internal diameter) × 610 mm (internal length) with wave type lining. material dry mineral. size − reduced to < 13,200 μm.
The standard Bond Rod Mill Work Index test procedure is firstly to stage crush the feed to pass mm, and size a representative sample. The test then involves a series of batch grinds in a standard Bond rod mill. A Bond rod mill is by, with wave liners (of a form described by Bond), which runs at 40rpm and tilts as described below.
Measuring ore grindability in rod mills. The Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill. It can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions. It is a ''locked cycle'' test conducted in closed circuit with a laboratory ...
Bond Rod Index Mill, 12" x 24" consisting of a one (1) piece cast shell complete with integral wave, 1 Hp 3/60/220 volt motor/gear reducer drive, support frame which allows the mill to tilt +/ 5 degrees during operation and 45 degrees for discharge (manual operation), receiving pan, rod charge and control panel complete with digital revolution counter, start/stop buttons and emergency ...
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