Bond rod mill work index results from Australian laboratories with smooth liners should not be used in the SAGMILLING.COM 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. Sample Requirements
Jun 06, 2015 Bond Work Index Procedure and Method. This 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
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 212m. Abrasion Index Test. The Abrasion Index is a recognised procedure to quantify abrasiveness and approximate wear that can be expected on media and mill liners. The test
Bond Rod Mill Work Index - thomasstroeckens.de 2011-12-6world it shows that the ball mill work index is normally distributed with an average of 146 and a median of 148 kwht bond rod mill grindability the bond rod mill grindability test is performed similarly to the ball mill test the feed sample...
This knowledge is essential to define the required ball mill layout and production capacity. In order to perform the Bond Index Test successfully it is necessary to use pre-crushed sample material as defined below Module Ball Mill. Minerals pre-crushed to 3.35 mm and sieved Drillcore pre-crushed to 3.35 mm and sieved Half Drillcore pre-crushed to 3.35 mm and sieved The Bond Index conforming ball charge consists of 43 x
Simulating the Bond rod mill grindability test. Minerals Engineering, 2012. L. Marcelo Marque... Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Simulating the Bond rod mill grindability test.
Jul 30, 2020 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 screen.
rod mill Work Index test for these purposes. Chose a o closing screen for the ball mill test one (standard square root of 2 series) mesh size coarser than the plant ball mill circuit P80. If between standard mesh sizes, the finer of the chose two. Results of Bond ball mill tests conducted with closing
This test was originally devel- tion method of the Bond rod-mill work index. On the basis of their oped in the mid 1930s by F.C. Bond. Though, it was altered in suc- research, a new method was developed to calculate the Bond rod- ceeding years, it has essentially remained unchanged since 1961 mill work index.
Jan 01, 2013 To calculate the Bond work index ( Wi) in a standard laboratory scale rod-mill, Bond derived the following equation (1) W i 62 P i 0.23 G i 0.625 10 P - 10 F kw h sh t where F is 80% passing size of original feed, P is 80% passing size of circuit product and Pi is the test-sieve size in m 1. The standard procedure to determine all Bond ...
Bond Rod Mill Index Test. The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80 passing 12.7 mm 189 inch, the original test being developed in imperial units to a product size of approximately 1 mm in the original and still the standard, 14 mesh see Chapter 4 for definition of mesh, thus determining the rod mill work index ...
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 ...
The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing 12.7 mm ( inch, the original test being developed in imperial units) to a product size of approximately 1 mm (in the original and still the standard, 14 mesh see Chapter 4 for definition of
bond work index tests - grinding solutions ltd. 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 212m. abrasion index test. the abrasion index is a recognised procedure to quantify abrasiveness and ...
the Bond work index is relatively consistent anywhere in the world, and should be very repeatable 5. BOND ROD MILL GRINDABILITY The Bond rod mill grindability test is performed similarly to the ball mill test. The feed sample is stage-crushed to (12.5mm) and the test is run under a 100% circulating load. The test can
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, Work Index Efficiency, Bond Work Index testing 4.INTRODUCTION AND BACKGROUND
The SAGDesign test was developed to overcome technical limitations of the SPI (Starkey, et al, 2006). The laboratory bench-scale SAG mill reproduces operating conditions of a commercial SAG mill, in a closed circuit dry grinding environment. The ground product for the laboratory
Commentary on the apparatus of the Bond rod mill work index The Bond Third Theory of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond (and his collaborators) were gathering the information to
Bond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bonds 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.
Essa Laboratory Rod Mills. Essa manufactures a range of metallurgical laboratory size ball and rod mills to suit most applications. Included in the range is a Bond Index Mill, which has specific application in establishing the grindability of ores. The ball and the rod mill are of essentially the same basic concept comprising a
work index series (ball mill, rod mill, and MacPherson autogenous) and pilot plant tests require relatively more weight (for a given top size) because they are run until a steady-state is achieved, which involves replacing the mill charge several times throughout the test. The Bond tests are typically run for a minimum of
FIGURE 5 BOND ROD MILL WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS (MPa) 5 10 15 20 25 30 35 WiRM (metric) The lack of fit observed relating the crushing Work Index was expected to carry over to the other Bond Work Indices. Figure 5 displays the plot of rod mill Work Index (Wi RM) versus UCS. These
Bond Rod Mill Asindex Test. Bond rod mill grindability test the test determines the bond rod mill work index which is used with bonds 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 closedcircuit dry grindability test performed in a standard rod mill
The Bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling. However the mass of ore required to conduct the test which can typically vary from about 8 to as much as 20 kg may represent a challenge when sample availability is critical.
Dec 04, 2020 The laboratory procedure for running a Bond ball mill work index test requires that the operator choose a closing screen sieve size. The instruction is to choose a sieve size that results in the ...
The Bond Work Index for Rod Mill is a special equipment for testing Bond rod mill work index. Simple lab test can choose rod mill by power method or judge the effects of material properties change to the rod milling process or the operation condition of rod mill by using this equipment. From
The crushed feed sample is subject to a grinding by a standard ball mill. The BBWi is calculated after achieving a consistent IPP of 28%. ... Bond Rod Work Index (BRWi) The sample is staged crushed to 100% passing 12.5 mm. The crushed feed sample is subject to a grinding by a
Laboratory Milling Rod / Ball Mills including Bond Rod / Ball Work / Grindability Index. MARC manufactures a wide range of laboratory ball / rod mills and automated Bond rod / ball mills (with wave liners) to suit most metallurgical laboratory applications.
Testwork Bond Ball Mill Work Index. 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. The test much achieve a steady-state before completion.
Oct 24, 2018 However, Bond Work Indeces are related to the type of equipment to be used (rod mill, ball mill, SAG uses Drop Ball parameter-Kwhr/m3-, so it is more complex than just specific energy consumption ...
A Bond rod mill is by with wave liners (of a form described by Bond) which runs at 40rpm and tilts as described below. Get Price rod mill work index classification. This test determines the Bond Rod Mill Work Index, which can be used with Bonds Third Theory of Comminution to calculate net power requirements of sizing rod mills.
For comparing the standard Bond rod-mill work index and the new modeled method, work index (Wi) and produced fine particles in a cycle (Gi) for the four samples determined. The performed paired Students t-test results indicated that the Standard Deviation for Gi and Wi obtained by the shortened method are respectively 0.50 and 0.58 in ...
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.
Bond Test WIs kWht Rod Mill Ball Mill 95 kWht8 9 kWht Bond Standard Circuit Work Index Assume the rod mill Work Index of 95 applies from the actual rod.
BOnd rOd mill GrindAbility The Bond Rod Mill Grindability Test is performed similarly to the ball mill test. The feed sample is stagecrushed to and the test is run under a 100 circulating load. As in the ball mill test, the test can also be closed with various sieve sizes, but for AGSAG.