# ball mill work index

### bond ball mill closed circuit grindability : 212 micrometers Vista Gold

8.97 (%). BULK DENSITY. 1.8904 (t/m3). IDEAL POTENTIAL PRODUCT. 378.1 (g). AVERAGE EQUILIBRIUM CIRC LOAD. 250 (%). AVERAGE PRODUCT. 0.780 (g/rev). 80 % PASSING FEED SIZE. 2484 (µm). 80 % PASSING PRODUCT SIZE. 154 (µm). BOND BALL MILL WORK INDEX ( Kilowatt hours / dry tonne ) : 29.0.

Chat Now### Compare and Understand Rod/Ball/ImpactCrushing/Abrasion

The Bond rod mill and ball mill work indices are the most similar in size classes, both being fed material crushed to "relatively fine" sizes. Both test are also lockedcycle tumbling tests where the charge of ore in the mill is brought to a steady state

Chat Now### paper Starkey & Associates

In the 2009 database, SAG pinion energies (to grind from F80 152 mm to T80 1.7 mm) vary from 1.4 to 34 kWh/t and Bond ball mill work index values vary from 6 to 24 kW/t for the same ores. Project design tonnages varied from 200 to 150,000 t/d, SAG mill sizes varied from 10 ft to 40 ft diameter in multiple SAG mills, and

Chat Now### A quick method for bond work index approximate value determination

Aug 11, 2016 undersize product (µm). Determination of the energy consumption for ore grinding in a Bond ball mill requires samples of standard size, because changes in the size of the samples cause the change of the Bond work index (Magdalinovic et al., 2012). Due to the Bond test complexity and length, as well as

Chat Now### bond ball mill closed circuit grindability : 212 micrometers Vista Gold

8.97 (%). BULK DENSITY. 1.8904 (t/m3). IDEAL POTENTIAL PRODUCT. 378.1 (g). AVERAGE EQUILIBRIUM CIRC LOAD. 250 (%). AVERAGE PRODUCT. 0.780 (g/rev). 80 % PASSING FEED SIZE. 2484 (µm). 80 % PASSING PRODUCT SIZE. 154 (µm). BOND BALL MILL WORK INDEX ( Kilowatt hours / dry tonne ) : 29.0.

Chat Now### Bond Work Index Tests Grinding Solutions Ltd

Grinding Solutions offer both rod and ball mill Bond work index tests as part of the companies detailed range of comminution testing services.

Chat Now### Bond Work Index FormulaEquation 911 Metallurgist

Sep 22, 2017 You can also review the stepbystep Bond Work Index Test Procedure I posted here. 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

Chat Now### Determining the Bond Efficiency of industrial grinding circuits

8.3 Bond Ball Mill Wi Test. 6. 8.3.1. Apparatus. 6. 8.3.2. Sample. 7. 8.3.3. Procedure. 7. 8.3.4. Calculations. 7. 8.4 Accuracy of Comparative Circuit Work Index Efficiency Determinations. 7. 9. DATABASE OF BOND GRINDING CIRCUIT EFFICIENCIES. 8. 10. RESOURCES, REFERENCES, AND RECOMMENDED READING.

Chat Now### Bond Ball Mill Index JKTech

A Bond Ball Mill Index Test (BBMWI) is a standard test for determining the Ball Mill Work Index of a sample of ore. The BBMWI is a measure of the resistance of the material to crushing and grinding. It can be used to determine the grinding power required for a given throughput of material under ball mill grinding consitions.

Chat Now### Bond Work Index Procedure and Method 911 Metallurgist

Sep 22, 2017 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 appliion methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge. Below describes in general terms the

Chat Now### Bond Ball Mill Index JKTech

A Bond Ball Mill Index Test (BBMWI) is a standard test for determining the Ball Mill Work Index of a sample of ore. The BBMWI is a measure of the resistance of the material to crushing and grinding. It can be used to determine the grinding power required for a given throughput of material under ball mill grinding consitions.

Chat Now### Bond Ball Mill Index Test JKTech

Measuring ore grindability in balls mills. The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. It can be used to determine the grinding power required for a given throughput of material under ball mill grinding conditions. It is a 'locked cycle' test conducted in closed circuit with a

Chat Now### correlation between bond work index and Assiut University

the work index depending on the grind size. In this way, work index values are usually obtained for some specific grind size that characterizes the grinding operation to design or under evaluation. This study was carried out in a standard bond ball mill 305 mm x 305 mm size in mineral processing laboratory, in the mining

Chat Now### Bond Work Index Procedure and Method 911 Metallurgist

Sep 22, 2017 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 appliion methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge. Below describes in general terms the

Chat Now### Simulation studies on Energy Requirement, Work Input and

Ball milling is a wide spread milling technology, particularly in mining mainly because of its simple construction and appliion. The Bond grindability testing procedure has been standardized to obtain the grindability values (i.e., Bond work index (BWi)) on the same ore when tests are performed in different laboratories or

Chat Now### Mill (grinding) Wikipedia

Ball mills are commonly used in the manufacture of Portland cement and finer grinding stages of mineral processing, one example being the Sepro E is the energy (kilowatthours per metric or short ton) W is the work index measured in a laboratory ball mill (kilowatthours per metric or short ton)

Chat Now### Ball Mill Instruction Manual (PDF) BICO Inc.

srindins balls tban witl oversize 3iD. balls. A material may havc an tudacel grain size resultins from some pref€rential siziry action which chatrses its natural size distributioa. Undersiz. s.indine bals can have this effect. Iaboratory.determinations of th. work index sbow the rcsiltance to breakagc at the rize rangc tcsled, and

Chat Now### Bond Ball Mill Work Index (Grindability Tests) YouTube

May 18, 2013 This video was put together by Joshua Wright and Aldo Vasquerizo as a supplemental lecture for University of Nevada Reno. If you have any questions, need adv

Chat Now### Compare and Understand Rod/Ball/ImpactCrushing/Abrasion

The Bond rod mill and ball mill work indices are the most similar in size classes, both being fed material crushed to "relatively fine" sizes. Both test are also lockedcycle tumbling tests where the charge of ore in the mill is brought to a steady state

Chat Now### development of comminution test method for small drill core Jultika

Outotec Mergan method is faster than the Bond ball mill test, and requires less sample material. However, the Mergan method gives grinding energy consumption, which can be used to calculate Mergan work index, but this Mergan work index differs from the. Bond work index. Therefore, it is needed to analyze if the Mergan

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