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Here is a list presented in table form of Rod Mill Work Index as tested/presented by SME handbook of mineral processing, N.L Weiss Editor, N.Y. 1985. [table "" not found /] Rapid Determination of Bond Rod-mill Work Index by Craig Taylor on Scribd
Ore hardness can be estimated using commercially available standard techniques such as the SAG Power Index (SPI), Bond Work Index (BWI), and JK Drop Weight (JKDW) tests (Bailey et al., 2009 ...
See this useful summary Table of Bond Work Index by Minerals. For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the Work Index always means the equivalent amount of energy to reduce one …
Using Rock Geomechanical Characteristics to Estimate Bond Work Index for Mining Production Blocks. ... the predicted values of the BWi for the samples in ore zones are in the range of 6.36 – 14. ...
GSL offers a range of Bond Work Index Testing from crushability and abrasion to ball and rod mills. For more information on the tests please see below: Bond Low Energy Impact Test. The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. The test determines the impact energy at ...
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. ... below 2.5 mm into the range of a few hundreds of micrometres. Heterogeneous ore types typically are sensitive to the product size of the test, and the work index value changes if the test is performed ...
Bond 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 below.
Ore grindability is represented by the Bond work index value [6] and Mucsi et al. [5] have summarized the most widely known and utilized grindability tests as Bond, Hardgrove and Zeisel methods [7 ...
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The Bond work index value changes with the sieve size chosen during a particular test. For example, instead of choosing the screen size through which 80% of the ore passes, the …
Here there are given tables from various sources for the Bond work index values of mining materials (ores, industrial minerals and rocks). These work indexes can be used for the determination of tumbling mills (rod, ball mills) power.
Using the Bond work index to measure operating comminution efficiency Published: 01 November 1998 Volume 15, pages 32–36, ( 1998 )
For example, GMS of –3350 + 2440µm size range equals to: (3350 x 2440µm)^0.5 = 2830µm. Repeat above procedure for the unknown sample. Read off F80(µm) and P80(µm) from the plots and calculate the comparative grinding work index (CWi) of the unknown. Note: F80= the diameter in micron which 80% of the feed weight passes.
No. 3-4, 2017 Mining & Metallurgy Engineering Bor25 Figure 4 The limestone content in circulating load during the standard Bond test on samples with the composition limestone : andesite = 25: 75 Figure 5 The limestone content in circulating load during the standard Bond test on samples with the composition limestone : andesite = 50: 50
The Bond low-energy impact test, also named impact work index or Bond impact crushing work index, can measure the crushing work index (CWI) and describes the …
cordance with Table. Each size range has a specific Bond work index conditioned by the Bond theory. Extensive discussion has been focused for many years on the energy hypotheses by Rittinger and Kirpichev–Kirck [7] for different researchers arrived at results which con-firmed either that theory or the other. Publication of the
The brittleness index (βi), which is used in fracture mechanics, is dependent on various factors such as composition, texture, porosity, and the applied external load to effect fragmentation (Ye ...
Ore grindability is represented by the Bond work index value [6] and Mucsi et al. [5] have summarized the most widely known and utilized grindability tests as Bond, Hardgrove and Zeisel methods [7 ...
The effect of circulating load and test sieve size on the Bond work index based on natural amorphous silica. 18th International Mining Congress and Exhibition of Turkey-IMCET Antalya, Turkey, 10-13 June, 517–522.
The higher the Work Index the more work required to crush the rock. The amount of energy required to do this work is important to understand to maximise efficiency. ... Ask the team about our Australian Made Range. Contact The Team. We are proud members of. Contact Us. Australia Office; 862 Cockburn Road, Henderson, WA 6166, Australia +618 6444 ...
Unconfined Compressive Strength (UCS) is a commonly used rockmass strength measurement used by rock mechanics practitioners. This paper examines potential relationships between …
which has a work index of 16.5 bond crushing work index equipment. how does a bauxite crusher works.bauxite ball mill work. bauxite ball mill work index if the material has rod and ball mill laboratory work indices as low as 10 kWh/t and a reduction ratio as high as 30 Actual cases are and contractors from a range of roles and operating areas
Derivation of Equation According to Hukki (1962), the specific energy required, E can be expressed in a general form of differential equation (1) for the case of a limited size range where C2 is reasonably constant. dE dx =C1 x c2 ( 1 ) An integrated form of Hukki's general equation leads to a power function described in equation (2)
International Journal of Mineral Processing, 27 ( 1989} 125-132 125 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands A Procedure for Rapid Determination of the Bond Work Index N. MAGDALINOVIC University of Belgrade, Technical Faculty at Bor, 19210 Bor (Yugoslavia) (Received November 24, 1987; accepted after revision …
With the rapidly rising cost for electrical energy and the long range pre¬dictions for continued rising costs and even possible energy shortages, operation of rod, ball, autogenous and partial autogenous grinding circuits to efficiently utilize the power delivered to the mills will be demanded. This calls for a method to evaluate grinding circuit performance that is accurate, reliable and ...
The general characteristic of all these methods is the need for either a Bond mill or a standard laboratory mill. A different, non-standard method for determining the Bond work index was presented using an experimental relationship between the Bond work index and the mechanical and elastic properties of the material (Yap et al., 1982). They ...
A higher Bond work index value was found for the BHJ ore (15.4 kWh/ton) than for the BHQ ore (12.4 kWh/ton). A decrease in the product particle size was associated with an increase in the work ...
Understanding your ore's variation of work index by size is particularly useful for SAG mill troubleshooting and production forecasting. Examples of the variation in work index at...
Download Table | Bond Work Index Test Results from publication: SAG mill circuit optimisation at Ernest Henry Mining | | ResearchGate, the professional network for scientists.
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 and finally the …
The main objective of this study is to determine Bond's work index. For this purpose, from grinding tests, a phenomenological model and the population balance model (PBM) were obtained and combined to calculate the Bond's work index. Grinding kinetics tests for nonmetallic and metallic sample ores were used.
A New Approach to the Calculation of Bond Work Index with Mixed ... Mining, Metallurgy & Exploration (2024) 41:1959–1965 1961 Assuming that the standard feed is provided, this study ... According to the range of the optimal lling rate of ceramic ball …
However, as the filling rate of ceramic balls increases from 20 to 40%, the Bond Work index decreases from 17.24 to 10.02kWh/t. When the filling rate of ceramic balls is 35%, the Bond Work index is 12.43kWh/t, which is …