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Dec 12 2016 · 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

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Bond Rod Mill Index Test JKTech. Rod Mill. Rod mills are very similar to ball mills except they use long rods for grinding media. The rods grind the ore by tumbling within the the mill. To prevent the conditions leading to rod charge tangling the length to diameter ratio is maintained at 1.4 to 1.6. Rod mills accept feed up to about 50 mm

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The design characteristics of industrial rod mills are similar to ball mills. Most rod mills used in mineral processing are of the overflow discharge type as illustrated in Figure 7.2a. Centre peripheral (Figure 7.2c) and end peripheral discharge mills (Figure 8.1) are also in use.The feed end is generally fitted with spout feeders scoop feeders double scoop feeders or drum feeders.

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The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits. The test requires a minimum of 10kg of sample that has been stage-crushed to 100 passing size of <3.35 mm. Any screen size below 600µm can be used for the testwork depending on your requirements. Bond Rod Mill Grindability Test

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Bond rod mill work index results from Australian laboratories with smooth liners should not be used in the SAGMILLING models. The test is a locked-cycle test where ground product is removed from test cycles and replaced by fresh feed. The test must achieve a steady-state before completion.

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Bond Rod Mill Index Test JKTech. Rod Mill. Rod mills are very similar to ball mills except they use long rods for grinding media. The rods grind the ore by tumbling within the the mill. To prevent the conditions leading to rod charge tangling the length to diameter ratio is maintained at 1.4 to 1.6. Rod mills accept feed up to about 50 mm

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standard Bond crushing and rod mill work indices abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed and Standard Autogenous Grinding Design (SAGDesign) Tests patented by Outokumpu. (See reference 8 below). The comparison of these results gives context to how the various measurements relate to each

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No 1 rod mill/ball mill circuit was operating very efﬁ ciently when comparing the combined operating work indices for both mills with the rod mill and ball mill laboratory work indices. Note in Figure. 1 that the rod mill product slope is less than 0.5 due to an extra amount of

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Bond Rod Mill Work Index RWi kWh/t 18.1 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. Mill operators have long used operating work indices to evaluate grinding circuit

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Generally Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research a simple fast and accurate procedure is introduced to find the rod-mill work index based on the conventional Bond work

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bond rod mill work index modified. We are here for your questions anytime 24/7 welcome your consultation. Get Price. The Bond Work Index figures obtained by backcalculation from the pendulum data are compared with the Net Work Index values obtained from the plants in Fig 8 The agreement is surprisingly good especially in view of the fact that

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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.

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Bond rod mill work index results from Australian laboratories with smooth liners should not be used in the SAGMILLING models. The test is a locked-cycle test where ground product is removed from test cycles and replaced by fresh feed. The test must achieve a steady-state before completion.

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Dec 12 2016 · 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

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Jan 03 2014 · Modern wire rod mills are high speed mills capable of rolling of smaller dimensions at high production rates while at the same time keeping investments and operating costs at the reasonable levels. As a rule wire rod mills are designed for an annual output of between 300 000 t and over 800 000 t (two strand mills).

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The standard Bond Rod Mill Work Index test procedure is firstly to stage crush the feed to pass 12.7 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 0.305m by 0.610m with wave liners (of a form described by Bond) which runs at 40rpm and tilts as described below.

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Bond 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 (Ai).

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In Mineral Processing Design and Operations (Second Edition) 2016. 3.4.7 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.

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Indices. (It is also the Bond design Work Index for this circuit.) To avoid the introduction of any designinefficiency factors in the Bond reference standard circuit assume 8 foot (2.44 m) diameter overflow mills and use a rod mill feed size (F80) of 16 000 m and a rod mill µ product size of 1 000 m .

Chat Online### Orway Mineral Consultants Canada Ltd. Mississauga ON

Bond 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 (Ai).

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Generally Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research a simple fast and accurate procedure is introduced to find the

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The Bond Operating Work Index not introduced until after 1950 has proven of immeasurable value in this regard but first has to be carefully considered in terms of its utility and limitations. Its prescribed use is described in a later section of this paper.During this review it became apparent that rod mill performance is generally not well

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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. The test is a closed-circuit dry grindability test performed in a standard rod mill.

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The Titan Bond Work Index Rod Mill is one-piece 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 production-size rod mills.

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Generally Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research a simple fast and accurate procedure is introduced to find the rod-mill work index based on the conventional Bond work

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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 -12.5mm material. Closing screen sizes typically range from 4.75mm to 212µm. Abrasion Index Test

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The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits. The test requires a minimum of 10kg of sample that has been stage-crushed to 100 passing size of <3.35 mm. Any screen size below 600µm can be used for the testwork depending on your requirements. Bond Rod Mill Grindability Test

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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

Chat Online### The effects of design and operating variables on rod mill

The Bond Operating Work Index not introduced until after 1950 has proven of immeasurable value in this regard but first has to be carefully considered in terms of its utility and limitations. Its prescribed use is described in a later section of this paper.During this review it became apparent that rod mill performance is generally not well

Chat Online### Bond Rod Mill Index Test JKTech

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

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Bond testing is a standard part of ore characterization for comminution circuits design and evaluation of performance. Bond For comparing the standard Bond rod-mill work index and the new

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