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· hard gold ores with average Bond ball mill work indices (BWi) of 15.1 and 16.6 kWh/t Bond rod mill work indices (RWi) of 22.8 and 24.2 kWh/t and JK Axb values of 27.9 and 25.5. The circuit is comprised of five 746 kW cone crushers four 2.4 m diameter (D) x

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Chat Online### Anaconda Mining Reports Metallurgical Testing Results for

· The Composites fell in the range of 28.1 to 32.9 A x b values from the SMC tests considered to be hard to very hard (resistance to impact breakage) and with a Bond Ball Mill Work Index median of 15.1 kilowatt hours per tonne ("kWh/t") which spanned the medium to medium-hard range of hardness.

Chat Online### The effects of ore blending on comminution behaviour

· blends was also of interest. From this work it has since been established that the Mertainen ore is the hardest where primary rod mill grinding is concerned. This is followed by the Kiruna ore and lastly the Leveäniemi ore. In secondary ball milling it has been established that the

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Work indexmeasure of grindability for the work to be done or done in grinding the circuit feed to the circuit product. Used to determine grinding circuits that are operating inefficiently. Work index is defined as power. Bond equation measures work done or to be

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Bond Work Indices. Bond rod mill work index determinations for the composites ranged from 14.2 kWh/tonne to 15.9 kWh/tonne with an average of 15.0 kWh/tonne. Bond ball mill work index determinations for the composites ranged from 11.1 kWh/tonne to 13.5 kWh/tonne with an average of

Chat Online### Anaconda Mining Reports Metallurgical Testing Results for

· The Composites fell in the range of 28.1 to 32.9 A x b values from the SMC tests considered to be hard to very hard (resistance to impact breakage) and with a Bond Ball Mill Work Index

Chat Online### Bigstone Foran Mining Corporation

Bond Work Indices. Bond rod mill work index determinations for the composites ranged from 14.2 kWh/tonne to 15.9 kWh/tonne with an average of 15.0 kWh/tonne. Bond ball mill work index determinations for the composites ranged from 11.1 kWh/tonne to 13.5 kWh/tonne with an average of

Chat Online### Bigstone Foran Mining Corporation

Bond Work Indices. Bond rod mill work index determinations for the composites ranged from 14.2 kWh/tonne to 15.9 kWh/tonne with an average of 15.0 kWh/tonne. Bond ball mill work index determinations for the composites ranged from 11.1 kWh/tonne to 13.5 kWh/tonne with an average of

Chat Online### COMPARISON OF HPGRBALL MILL AND HPGR

· Bond ball mill work index C Wi Bond crusher work index D HPGR roll diameter (m) E sp net specific energy consumption (kWh/t) F HPGR hydraulic pressing force (kN) F 80 particle size at which 80 of particles pass in feed F SP 2HPGR specific pressing force (N/mm ) L HPGR roll length (m) ṁ or m-dot HPGR specific throughput constant (ts/hm3)

Chat Online### EX-99.1SEC

· Bond Ball Mill Work Index was determined to be 13.33 kWh/t Pennsylvania Abrasion test to determine the consumption of steel media. It was determined that the greywacke material will consume a lot more steel media than other rock types the lithological weight average was a value 0.082.

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The test work will entail industry standard tests such as the Bond Rod Mill Work Index Bond Ball Mill Work Index JK/DWi tests and then some specific batch mill tests. The results of the test work will then be used to determine the parameters required for Simulation.

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

Basic Equations### Power-based modelling of single-stage AG and SAG mill

where WiC is the Bond crushing work index unitless P80 is the SAG hydrocyclone overflow 80 passing size µm F80 is the milling circuit feed 80 passing size µm WiRM is the Bond rod mill work index unitless WiBM is the Bond ball mill work index unitless EF4 and EF5 are the Rowland efficiency factors for oversized feed and fine grinding.

Chat Online### Characterization and Comminution Studies of Low-Grade

· Bond Work Index. A standard 12″ 12″ laboratory Bond ball mill was used to conduct the work-index experiments. About 50 kg of each of the BHQ and BHJ samples was prepared in −3.35 mm size by a jaw crusher followed by a roll crusher. Size analysis results for the crushed products of the BHQ and BHJ samples are shown in Fig. 1.

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U.S. MIDWEST DOMESTIC HOT-ROLLED COIL STEEL (CRU) INDEXOVERVIEW. Protect margins hedge physical positions offer floating and fixed price physical transactions and mitigate price risk more effectively with HRC Steel futures and options. The HRC Steel contract is settled against industry-approved price indices disseminated by a respected

Chat Online### Comparison between bond crushing energy and fracture

· Generally there are three Bond indices ball rod and crushability. The Bond ball and rod indices are determined using standard ball and rod mill respectively and are suitable for grinding. The Bond crushability index which is estimated using a standard impact crushability test is suitable for crushing21. Because the jaw crusher was

Chat Online### The effects of ore blending on comminution behaviour

· blends was also of interest. From this work it has since been established that the Mertainen ore is the hardest where primary rod mill grinding is concerned. This is followed by the Kiruna ore and lastly the Leveäniemi ore. In secondary ball milling it has been established that the

Chat Online### GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

· Bond Test WI s (kWh/t) Crushing 16.0 Rod Mill 14.5 Ball Mill 13.8 . Bond Standard Circuit Work Index kWh/t . W Total = 0.9 3.4 8.0 = 12.3 kWh/t = 14.1 kWh/t . Note 14.1 kWh/t is also the combined Cr-Rod-Ball test WI of the ore. This is also the expected Operating Wl of the Standard Circuit according to Bond. WISTD = Lab WICOMB = 14.1 kWh/t.

Chat Online### Anaconda Mining Reports Metallurgical Testing Results for

· The Composites fell in the range of 28.1 to 32.9 A x b values from the SMC tests considered to be hard to very hard (resistance to impact breakage) and with a Bond Ball Mill Work Index

Chat Online### METALLURGICAL TEST RESULTS SELENGE IRON ORE

· BWi-Bond Ball Mill Work Index (kWh/t) 19.4 19.9 5 Notes 1. The UCS results indicated that the samples range from strong to very strong. 2. The Bond CWi results indicated the crushability of the samples is medium. 3. The SMC results indicated that grinding of the samples by SAG milling of the samples is hard. 4. The Bond Ai results indicated

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Chat Online### METALLURGICAL TEST RESULTS SELENGE IRON ORE

· BWi-Bond Ball Mill Work Index (kWh/t) 19.4 19.9 5 Notes 1. The UCS results indicated that the samples range from strong to very strong. 2. The Bond CWi results indicated the crushability of the samples is medium. 3. The SMC results indicated that grinding of the samples by SAG milling of the samples is hard. 4. The Bond Ai results indicated

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Chat Online### Estimation of Grinding Time for Desired Particle Size

· Magdalinovic N Trumic M Trumic G Magdalinovic S Trumic M (2012) Determination of the Bond work index on samples of non-standard size. Int J Miner Process 114–117 48–50. Google Scholar 13. Tavares LM De Carvalho RM Guerrero JC (2012) Simulating the Bond rod mill grindability test. Miner Eng 26 99–101

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

FIGURE 8 ROD MILL/BALL MILL WORK INDEX RATIO v. UNCONFINED COMPRESSIVE STRENGTH 100 200 300 400 UCS (MPa) 0 0.5 1 1.5 2 WiRM/WiBM (metric) Siddall et al (1996) identified the ratio of Bond rod mill Work Index and ball mill Work Index as being indicative of an ore s compentency. Figure 8 plots this ratio versus UCS no trend is apparent

Chat Online### Characterization and Comminution Studies of Low-Grade

· Bond Work Index. A standard 12″ 12″ laboratory Bond ball mill was used to conduct the work-index experiments. About 50 kg of each of the BHQ and BHJ samples was prepared in −3.35 mm size by a jaw crusher followed by a roll crusher. Size analysis results for the crushed products of the BHQ and BHJ samples are shown in Fig. 1.

Chat Online### Power-based modelling of single-stage AG and SAG mill

where WiC is the Bond crushing work index unitless P80 is the SAG hydrocyclone overflow 80 passing size µm F80 is the milling circuit feed 80 passing size µm WiRM is the Bond rod mill work index unitless WiBM is the Bond ball mill work index unitless EF4 and EF5 are the Rowland efficiency factors for oversized feed and fine grinding.

Chat Online### Sampling and analysis for feasibility studies and mineral

· GRINDABILITY TESTS Bond Rod mill work Index • The rod mill work Index is also normally distributed with and average and median of 14.8kWh/t • It is common to observe difference between the ball and rod mill caused by variation in ore hardness • The test has been mainly used for the design of rod mill or primary ball mills. http

Chat Online### Power-based modelling of single-stage AG and SAG mill

• WiRM the Bond rod mill work index (conducted using a wave-liner mill and a fourteen mesh closing size) unitless (but relative to either a metric tonne or Imperial short ton basis). Wi RM = 115 ( A b ) -0.57 based on reinterpretation of Doll 2016

Chat Online### PILGANGOORA LITHIUMCOMMINUTION TEST WORK

· • Bond Rod Mill Work Index (RWI) • Bond Ball Work Index (BWI) This Feasibility Study Comminution test work built upon and refined the results from the Scoping Study and has provided the material for the Beneficiation phase of the ongoing metallurgical test 9/1/2015 8 26 11 AM

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