Bond index is useful in designing of grinding system in mineral processing. In this study, the Bond work index of Birnin- Gwari iron ore in northern Nigeria is determined using modified Bonds method using reference ore. Samples of iron ore were sourced using random method, reference minerals marble and granite of known weight and iron ore of known weight were ground using the ...
The Bond work index is a parameter which represents a measure of an ore resistance to grinding. Numerically, the work index represents the energy kWhsht required to reduce the material of one short ton from a theoretically infinite feed size to size at which 80 percent of material passes through sieve with square aperture100
DOI 10.1007S11771-018-3784-X Corpus ID 139575883. Effect of magnetite content on Bond work index and preconditioning Case study on Chadormalu iron ore mine articleShad2018EffectOM, titleEffect of magnetite content on Bond work index and preconditioning Case study on Chadormalu iron ore mine, authorHossein Inanloo Arabi Shad and F. Sereshki and M. Ataei and M.
The work index of 20.39 Kwhs ton value obtained when granite was a reference ore is within the limit of work index of some iron ores in Nigeria Weiss, 1965 and Thomas, 2007. 4. CONCLUSION AND RECOMMENDATIONS The study shows that work index of Birnin Gwari iron ore can be taken as 28.66 Kwhston i.e.
Jan 01, 2016 Effect of the test screen size on work index. The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWht required to grind to that size. Magdalinovic measured the Bond work index of three ore types using different test screen sizes.
Grinding is a process of reduction of lumps to powder depending on the ... The Bond work index for B and C type iron ore sample are of 11 and 10 KWhmt. Using the Bond work index to measure operating ... - OneMine Key words Comminution Bond work index Grinding
Shahsavari, Procedure for determination of Bond ball work The grindability experiments was carried out on the four typical index in the commercial operations, Min. Eng. 22 2009 104106. samples of copper, leadzinc, manganese and iron ore in specified 13 L. Tavares, R. Carvalho, J. Guerrero, Simulating the Bond rod-mill grindability ...
1 Introduction Finding the bond work index of an ore type is crucial to determining the grinding energy required during comminution in a ball mill. The bond work index is a constant characteristic related to the hardness of a specific ore type. Bond work index is one of three different approaches that can be used to calculate the work index of an ore.
Combinations of HPGR units 1.0 m and 0.25 m diameter, jaw crushers and Bond ball mills were used to grind a 32 mm top size porphyry copper feed BBWI 12.1 to a product P80 size of about 150 m.
Aug 18, 2021 Bond abrasion indexAi g 0.081 Crusher impact work index kWht 5.4 Bond ball mill work index kWht 8.0 JK DWT parameterA b 63.1 2.26 142.6 JK parameterta 2.56 P95 in the productfeed to otation mm 0.150 The ore in question is
work index W i having a different samples of limestone in-cluding Face-2B, Face-4A, Face-4B, Face-5A, Face-5B, Face-6A and Face-6B were collected from Lucky Cement Limited. These samples analyzed for Bond work index. Work index results show that all samples falls under the cate-gory of HARD ROCK except Face-4A W i 20kwht. Limes-
Size reduction of ore is an extremely energy-intensive process 12 1314151617, where energy is inversely related to the required particle size. Parameters such as Bond work index and ...
Jul 01, 2013 World consumption of iron ore grows 10 per annum on average with the main consumers being China, Japan, Korea, the United States and the European Union. This entry was posted in Uncategorized. Bookmark the permalink .
Request PDF Investigation of iron ores based on the bond grindability test Grinding is a process of reduction of lumps to powder depending on the requirement of particle size and particle shape.
Numerically, the work index is the energy required in kwht to reduce a given material from theoretically infinite feed size to 80 passing 100 microns. The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test. Bond developed separate tests for
Jan 01, 2005 The Bond mill developed by F.C. Bond is universally used for grindability testing, including determination of the Bond Work Index W i. A charge of 285 iron balls ranging from 15.2 to 44.4 mm diameter and weighting 20.648 g is used.
in the design of a grinding circuit. The Work Index is used when determining the size of the mill and grinding power required to produce the required ore throughput in a ball mill. 2. Procedure 2.1. Bond Ball Mill Grindability The sample was crushed to 100 passing 6 mesh 3.35mm, from this a 700 cc volume was measured and weighed to be. Read More
Crushability workindex for iron ore - smocthumpamonin 247 onlineow to bond index in rock crusher iron ore crusher equipment how to bond index in rock crusher description , bond crushability work index , crushability and bond work index relation high-frequency screen is a good choice for screening and grading the fine particles of.
Bonds Equation states that W Wt Wir 10 2 From the plot of cumulative wt passing against particle size of the reference ore figure 1,the followings were obtained. 80 passing feed size 1700 m 80 passing of product 460 m Work index of the reference ore Granite 15.14Kwhtonne The energy expended in grinding the ore from ...
Grinding is a process of reduction of lumps to powder depending on the requirement of particle size and particle shape. The present investigation involves the identify the physical properties of three different types of iron ores by using Bond ball mill. The result shows that the maximum Bond work index of 14 KWhmt was obtained for A type iron ore sample.
Jan 10, 2020 Grinding is a process of reduction of lumps to powder depending on the requirement of particle size and particle shape. The present investigation involves the
Jan 01, 2009 1.. IntroductionA Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore. It was developed by Fred Bond in 1952 and modified in 1961 JKMRC CO., 2006.This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling, for estimating the energy required for grinding, and for ball mill ...
application. It is important to mention that the Bond Index for that iron ore was 23 kWht, which was very hard. The selection of the ball size has been already summarized by McIvor 1997. A first start is to use the Bonds equation to determine the recommended top size of the grinding balls. In the trial
properties. Chadormalu deposit is one of the largest iron ore mine in Iran, which is located in Yazd province. The representative ore sample contained 57Fe, 0.9P and 0.17S. The sample was crushed afterward, it was ground in various grinding times according to the Bond Ball mill approach to specify the work index values.
Mar 14, 2018 This step involves the material being retained inside the mill for a specific time with or without grinding balls which is calculated by applying Bonds work index to the process calculation. This index takes into account the material ore hardness and feed size, mill speed, material recirculation, desired fineness, etc.
The 80 passing size P of the broken rock must be measured by size analysis or must be estimated to obtain the blasting work index. Two blasting tests Bond, 1954 on Taconite iron ore in Minnesota five years ago gave work index values of 14.5 and 13.5, or an average of 14.0, which compares with 14.7 recently obtained in crushing this ore in ...
Besides, the results of work index tests are accordingly implemented in Equation 5 to calculate the ore work index values. Equation 5 is similar to Bond work index equation, but it has been defined for the foregoing calibrated bond ball mill 15. P F P G Wi i i 10 10 11.76 1 1 230. 75 u u 5 Where, W i Bond laboratory ball work index
commonly used parameter to measure ore grindability is the bond work index, 11. The bond ball mill index test is a standard test for determining the ball mill work index of a sample ore, 8 10. The work index expresses the resistance of the material to crushing and grinding. Numerically, work index is
our specialist iron ore metallurgists work with you and your consultants ... Bond impact crushing work index Bond rod mill work index Comparative work index High pressure grinding rolls HPGR up to 10tph ... to estimate lumpfines ratios and the particle size
of energy required to grind the ore to the required size Gupta and Yan, 2006 Wills and Finch, 2016. The data generated is then utilised in designing and evaluating comminution circuits and efficiencies Kumar, 2011. The most widely used parameter in measuring grindability is Bond Work Index BWI.
In this study, the mineralogical, chemical characterization and physical properties of Sudanese iron ore in west of Omdurman city were studied using microscopic investigations, X-ray Diffraction analysis XRD, X-ray Fluorescence XRF ...
bond work index an overview sciencedirect topics. The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 3.36 mm 6 mesh to product size in the range of 45-150 m 325-100 mesh, thus determining the ball mill work index Wi B or BWi.
11 Aug 2016 Abstract The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Evaluation of grinding circuits for iron ore - SciELO
Bond Work Index - an overview ScienceDirect Topics. Bond impact crushability work index CWi ranges for an Australian iron ore The ball mill work index laboratory test is conducted by grinding an ore sample If the Bond work index is 400 kWhton, what is the power requirement to process . Get Price
and consumed power to grind one tone of iron ore were determined via standard Bond mill. The results showed that the ore is hematitic ore with Goethite and quartz minerals. The ore is low grade containing 41.41 Fe2O3 and 50.88 SiO2. The bond work index test obtained high work index 52.60 kw.ht and consumed power 11.72 kw.ht to grind one ton of low grade iron ore and this