### Using the Bond work index to measure operating comminution

· Using the Bond work index to measure operating comminution efficiency C. A. Rowland 1 Mining Metallurgy Exploration volume 15 pages 32–36 ( 1998 ) Cite this article

Chat More### USING THE SMC TEST® TO PREDICT COMMINUTION

· work index covering grinding of fine particles is labelled M. ib (Morrell 2008). M. ia. values are provided as a standard output from a SMC Test ® (Morrell 2004. a) whilst M. ib. values can be determined using the data generated by a conventional Bond ball mill work index test (M. ib. is NOT the Bond ball work index). M. ic. and M. ih

Chat More### Using the Bond work index to measure operating comminution

· Using the Bond work index to measure operating comminution efficiency C. A. Rowland 1 Mining Metallurgy Exploration volume 15 pages 32–36 ( 1998 ) Cite this article

Chat More### CORRELATION BETWEEN BOND WORK INDEX AND

· The Bond s standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80 passing 100 µm. If the breakage

Chat More### GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

· Bond Test WI s (kWh/t) Rod Mill Ball Mill 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19 300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill

Chat More### Using the Bond work index to measure operating comminution

· Using the Bond work index to measure operating comminution efficiency C. A. Rowland 1 Mining Metallurgy Exploration volume 15 pages 32–36 ( 1998 ) Cite this article

Chat More### Determination Of The Bond Work Index Using An Ordinary

Numerically the work index is the energy required in kwh/t 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 the rod mill and the ball mill.

Chat More### Alsto Bond Index Ball MillMineral Stats

Alsto Bond Index Ball Mill. Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index. This is empirical index determined by closed circuit grindability tests developed by F.C.Bond in the mid 1930 s. It requires a specific 305mm diameter x 305mm

Chat More### Determination Of The Bond Work Index Using An Ordinary

Numerically the work index is the energy required in kwh/t 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 the rod mill and the ball mill.

Chat More### Bond Work Index Formula-Equation911 Metallurgist

Basic Equations### CORRELATION BETWEEN BOND WORK INDEX AND

· The Bond s standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80 passing 100 µm. If the breakage

Chat More### Bond Work Index Procedure and Method911 Metallurgist

· 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

Chat More### Comparison of UCS to Bond Work Indices

FIGURE 6 BOND BALL MILL WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS (MPa) 5 10 15 20 25 30 WiBM (metric) Figure 6 displays the plot of ball mill Work Index (Wi BM) versus UCS. Still no relationship is observed.

Chat More### Calculation of energy required for grinding in a ball mill

· INTRODUCTION The energy consumption for grinding according to Bond (1961) is deter- mined by the formula / 10 10 (I) The work index is determined by grinding experiments carried out in a labo- ratory Bond ball mill. Based on the results of grinding experiments numerical values of the work index Wi are calculated according to the formula

Chat More### Correction of Bond Ball Mill Work Index Test for Closing

· It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh to give a P80 close to desired grind size. This is because work index frequently changes as a function of the product size in comminution. If target grind size during a project is changed or if

Chat More### Investigation into the applicability of Bond Work Index

· Bond Work Index (BWI) Hardgrove Grindability Index (HGI) tests for biomass coal. • BWI can predict the potential for mill choking of biomass in a tube and ball mill. • HGI is a poor method of predicting grindability of biomass in vertical spindle mills. • Pellets should be composed of pre-densified particles close to the target size. •

Chat More### CORRELATION BETWEEN BOND WORK INDEX AND

· The Bond s standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80 passing 100 µm. If the breakage

Chat More### Bond Work Indexan overview ScienceDirect Topics

Ball mill design requires a Bond work index BWi for ball mills at the correct passing size SAG mill design requires an appropriate SAG test for example SPI (Chapter 5). Flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for each mineral ( Chapter 12 ).

Chat More### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

· micrometers in size. According to the Bond standard procedure the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250 circulating load (Bond 1949 1952 1961). The test is performed on a raw material approximately weighing 10 kg which coarseness is 100 -3.327 mm.

Chat More### Bond Work IndexDetermination of the Bond Work Index of

Lastly substituting all the values in equation 1 the Bond work index of the ore was determined to have a value of 41.38 kWh/tone. The Bond work index in addition to it as being the measure of the material s hardness or resistance to crushing and grinding gives an important indication of the efficiency of the machine being used. The larger the Bond work index the larger the consumption of

Chat More### A New Approach to the Calculation of Work Index and

· The work index . W. i. was defined by F. Bond as the specific energy (kWh/ton) required to reduce a particulate Ball Mill Batch Process The mill dimensions (D L) are 0.204 0.158 m and it is loaded with 6.5 kg steel balls between 25 and 32 mm in diameter. The mill

Chat More### Rapid determination of Bond rod-mill work index by

· 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 P10 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 μm 1 . The standard procedure to determine all Bond

Chat More### A New Approach to the Calculation of Work Index and

· The work index . W. i. was defined by F. Bond as the specific energy (kWh/ton) required to reduce a particulate Ball Mill Batch Process The mill dimensions (D L) are 0.204 0.158 m and it is loaded with 6.5 kg steel balls between 25 and 32 mm in diameter. The mill

Chat More### A Bond Work index mill ball charge and closing screen

· An alternative mill ball charge is proposed that closely approximates Bond s original total ball mass number of balls and ball surface area. Results of 30 Bond Work index tests of six pure materials (calcite magnesite labradorite (feldspar) quartz andalusite and glass) using closing screen apertures (P 1 ) values of 500 250 125 90 and 63 μm are analysed.

Chat More### Alsto Bond Index Ball MillMineral Stats

Alsto Bond Index Ball Mill. Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index. This is empirical index determined by closed circuit grindability tests developed by F.C.Bond in the mid 1930 s. It requires a specific 305mm diameter x 305mm

Chat More### Comparison of the Different Ways of the Ball Bond Work

· Keywords Ball Mill Work Index Bond Index Grindability Ball grinding Ore testing Grinding energy consumption Physical and mechanical ore properties Suggested Citation Suggested Citation Valerevich Lvov Vladislav and Sergeevich Chitalov Leonid Comparison of the Different Ways of the Ball Bond Work Index Determining (September 12 2019).

Chat More### Ball mill work index adjustmentSAGMILLING.COM

· Ball mill work index adjustment. The Bond ball mill work index test requires the operator to select an appropriate screen size to "close" the test. The procedure states that the closing screen size should be such that the product size of the test is the same as the expected product size of

Chat More### Investigation into the applicability of Bond Work Index

· Bond Work Index (BWI) Hardgrove Grindability Index (HGI) tests for biomass coal. • BWI can predict the potential for mill choking of biomass in a tube and ball mill. • HGI is a poor method of predicting grindability of biomass in vertical spindle mills. • Pellets should be composed of pre-densified particles close to the target size. •

Chat More### Comparison of UCS to Bond Work Indices

FIGURE 6 BOND BALL MILL WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS (MPa) 5 10 15 20 25 30 WiBM (metric) Figure 6 displays the plot of ball mill Work Index (Wi BM) versus UCS. Still no relationship is observed.

Chat More### Alsto Bond Index Ball MillMineral Stats

Alsto Bond Index Ball Mill. Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index. This is empirical index determined by closed circuit grindability tests developed by F.C.Bond in the mid 1930 s. It requires a specific 305mm diameter x 305mm

Chat More### Bond Ball Mill Work Index GTEK

· Bond Ball Mill Work Index. GTEK Bond Ball Mill Work Index is used for determine the grindability of materials and help to choose the most suitable type and model of grinding equipment. Ask For Quote Donwload. Find more details in the options below. Photo.

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