Kinetic grinding test approach to estimate the ball mill work index 345 Kinetic grinding Exactly 700 cm3 of passing mm material from each sample was progressively grounded in periods of , 1, 2, 4, and 8 minutes.

Get PriceThe Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial comminution plants designing. Determining the Bond work index value is quite complicated, timeconsuming and requires trained operating personnel and therefore is subjected to errors.

Get PriceThis 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 Metallurgical Testing Laboratory.

Get Pricethe work index (wi) of the ore [2]. A number of methods of grindability test which are simper and faster and at the same time produced comparative results with choice of Bond’s were device. One of these methods was derived by [1]. The determination of work index using modified Bond’s method can be …

Get PriceJktech Laboratory Services Jktech Jktech. For every bond ball mill work index test carried out at jktech a standard report is issued the report details the bond test procedure method and presents the results including f80 p80 grindability and work index further interpretation of the results is available if required frequently asked questions bond ball mill work index.

Get PriceNov 21, 2012· The Bond work index, W i, is defined in a Bond ball mill on the samples of standard size − + 0 practice, it is possible to find materials of nonstandard size that are finer than mm. In this work, a procedure for the calculation of the Bond work index is suggested for cases when the Bond grindability test is conducted on samples of nonstandard size.

Get PriceThe Bond work index determination according to the standard Bond test wa s done . on all samples with a comparative sieve size of 74 micrometers. After each grinding . cycle, ...

Get PriceWi = Bond work index (either Imperial or Metric units) P = The 80% passing size of the ground product in µm F = The 80% passing size of the feed in µm . The test is a closed circuit dry grindability test performed in a standard ball mill. It can be performed at mesh sizes ranging from 28 mesh to 400 mesh.

Get PriceA 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 2006this index is widely used in the mineral industry for comparing the res Bond ball mill work for pure quartz.

Get PriceWe have Determination Bond Work Index Of Iron Ore,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 wearkwh of energy used in the comminution process.

Get PriceBond Work Index FormulaEquation Basic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack Energy The basic work index equation is:W = 10 Wi/√P – 10 Wi/√F(1)where W is the work input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the work index, or the grinding resistance ...

Get Priceand its correlation. As a fast method, the determination of the Bond index from the Hardgrove index (by calculation) is almost matching with measured Bond’s work index. The Bond’s work index of the above rock samples calculated from the Hardgrove index value has shown a …

Get PriceThe most widely used parameter to measure ore grindability is the Bond work index, W i [6]. Work index is the energy required in kWh/shortton to reduce a given material from theoretically infinite size to 80% passing size, 100 microns [7]. The determination of work index using Bond’s method can be compared to the method of

Get PriceThe Bond and the Hardgrove methods are widely used for the determination of brittle materials' grindability. Generally, the determination of the Bond work index of inhomogeneous materials can be carried out with high deviation using the conventional grindability apparatuses and methods, because of the highly different grindability of components.

Get PriceAs a fast method, the determination of the Bond index from the Hardgrove index (by calculation) is almost matching with measured Bond’s work index. The Bond’s work index of the above rock samples calculated from the Hardgrove index value has shown a variation from to kWh/ A correlation is found between the friability value and ...

Get Priceball mill bond work index for li ne. Bond Work Index FormulaEquationYou can also review the stepbystep Bond Work Index Test plotted lines The standard work index Wi100 work input to the ball mill bond work index for li ne Bond Work Index FormulaEquation Determination Of The Bond Work Index Using An . Learn More bond formula for jaw crusher grinding

Get Price11 Crushing and classification particlesorguk. The table also includes the Bond Work Index, which is discussed in the next section 114 Crushing and classification include Jaw and Cone Crushers Secondary crushing can be by rotating surfaces such as swing hammer mills, for brittle materials, and roll Bennett RRB cumulative function, equation 25

Get PriceThe ore is low grade containing % Fe2O3 and SiO2. The bond work index test obtained high work index /t and consumed power /t to grind one ton of low grade iron ore and this attributed to the high concentration and hardness of quartz mineral which is considered the main gangue of the ore in study area

Get Pricework index bond molienda . Rapid determination of Bond rod mill work index by, Rapid determination of Bond rod mill work index by modeling the grinding kinetics, Get Price ; 3 index bond ball mill . has been worked out for the determination of the Bond work index, The comparisons of the test results of six ore samples showed that ...

Get PriceAt 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 Index (BWI) is used for the range from mm down to 100 µm. Adjustment of grinding parameters:

Get PriceA quick method for bond work index approximate value determination 323 This method, by using mathematical algorithms, simulates the Bond test on the basis of the results from the first two milling cycles. Magdalinovic (1989) proposed a shortened method for determining the Bond work index, which includes two milling.

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