13-09-2021· A summary of the technical and financial metrics of the Study in comparison with the 2020 PFS is provided in the Table , Bond rod mill work index, Bond ball mill work index and abrasion index ,...

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2 天前· SGS del Perú SAC in Lima, Peru (“SGS Lima”) completed grind hardness and abrasion test work, which indicated the Bond Ball Mill Index for oxide, transitional and sulphide materials would be 166 kilowatt-hour per dry metric tonne (“kWhr/dmt”), 141 kWhr/dmt, and 123 kWhr/dmt, respectively, and considered generally “moderate to hard” for purposes of grinding...

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Mill diameter; Mineral density; Work Index Bond estimated the amount of wear in terms of kilograms per kWh based on the abrasion index, A;, ie, Wet Ball Mill = kg kWh = 016(A i-0015) 033; Dry Ball Mill = kg / kWh = 0023A i 05; Replacement Ball Size...

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01-08-2005· The Bond work index is one of the most useful and interesting parameters used in designing grinding equipment However, it must be obtained under restrained conditions, especially in regards to the Bond standard lab mill The main objective of this study is to show how this index can be obtained using a Denver ball mill, which is present in most mineral processing laboratori The ,...

A simulated test method for Bond ball mill work index (BWI) was used to perform the comminution test The results showed BWI values vary from 567 kWh/t to 2021 kWh/t Examination of the possible correlations between BWI and the geological features showed that the key geological feature related to comminution variability is lithology...

Steel - data, forecasts, historical chart - was last updated on September of 2021 Steel is expected to trade at 568897 Yuan/MT by the end of this quarter, according to Trading Economics global macro models and analysts expectations Looking forward, we estimate it to trade at 533798 in 12 months time Trading Economics members can view ....

Total circuit energy is compared using both Bond’s third theory and work index values, and a newly developed methodology of direct energy measurement In order to validate the results of the digital energy meter, measured energy results made in the Bond ball mill were compared to several other energy evaluation techniques that included mill power models, DEM and Bond energy “back ....

Mill diameter; Mineral density; Work Index Bond estimated the amount of wear in terms of kilograms per kWh based on the abrasion index, A;, ie, Wet Ball Mill = kg kWh = 016(A i-0015) 033; Dry Ball Mill = kg / kWh = 0023A i 05; Replacement Ball Size...

10-09-2013· The Bond work index can be determined by many ways, some of them are as follows: with the traditional standard method in a (1) Bond-ball mill or in a (2) Hardgrove mill with the conversion of the Hardgrove method's result to Bond work index by an empirical formula, (3) with the more work-saving Karra algorithm (compared to the standard Bond method), where the Bond work index is ,...

Steel - data, forecasts, historical chart - was last updated on September of 2021 Steel is expected to trade at 568897 Yuan/MT by the end of this quarter, according to Trading Economics global macro models and analysts expectations Looking forward, we estimate it to trade at 533798 in 12 months time Trading Economics members can view ....

07-12-2018· 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 the test is run at the wrong product size, then it is necessarily to provide a correction The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis...

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03-12-2020· Sirios Resources Inc NI 43-101 – Technical Report and Mineral Resource Estimate Update Cheechoo Project DECEMBER 2020 BBA Document No: 6474001-000000-40-ERA-0002-R00 DATE AND SIGNATURE PAGE...

ball mill and can be performed at mesh sizes ranging from 48 mesh to 400 mesh Bond Ball Mill Work Index (and modified Bond Work Index) data can be used in the CEET® grinding simulator • The Bond Rod Mill Grindability Test determines the Bond Rod Mill Work Index which is used to determine net power requirements for sizing rod mills The ....

03-12-2020· Sirios Resources Inc NI 43-101 – Technical Report and Mineral Resource Estimate Update Cheechoo Project DECEMBER 2020 BBA Document No: 6474001-000000-40-ERA-0002-R00 DATE AND SIGNATURE PAGE...

The Bond method for ball mil designing has been used for 60 years Based on the Work Index test, such method is applied mostly in traditional circuit configuration, which includes multi-staged crushing, followed by rod and ball milling...

Definition of Specific Energy Requirements and Efficient Design of a Grinding Circuit (Simulation of Mill Sizing and Prediction of Mill Feed Rates by DJB’s “Millpower2000” Bond Work Index-based Methodology, Matching the Mill Drive to the Mill for Effective Operating Capability to the Desired Operating Criteria, Comparison with the Results of Alternative Test Protocols)...

18-12-2013· where W is the specific grinding energy (kWh/t), W i is the Bond ball mill work index (kWh/t), F80 is the feed 80 pct passing size (μm), and P80 is the product 80 pct passing size (μm) It can be seen that in the regime in which the Bond equation is valid, energy use increases exponentially as product size decreases with constant feed size, with an exponent of (approximately) −05...

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A simulated test method for Bond ball mill work index (BWI) was used to perform the comminution test The results showed BWI values vary from 567 kWh/t to 2021 kWh/t Examination of the possible correlations between BWI and the geological features showed that the key geological feature related to comminution variability is lithology...

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Mill diameter; Mineral density; Work Index Bond estimated the amount of wear in terms of kilograms per kWh based on the abrasion index, A;, ie, Wet Ball Mill = kg kWh = 016(A i-0015) 033; Dry Ball Mill = kg / kWh = 0023A i 05; Replacement Ball Size...

18-12-2013· where W is the specific grinding energy (kWh/t), W i is the Bond ball mill work index (kWh/t), F80 is the feed 80 pct passing size (μm), and P80 is the product 80 pct passing size (μm) It can be seen that in the regime in which the Bond equation is valid, energy use increases exponentially as product size decreases with constant feed size, with an exponent of (approximately) −05...

ball mill and can be performed at mesh sizes ranging from 48 mesh to 400 mesh Bond Ball Mill Work Index (and modified Bond Work Index) data can be used in the CEET® grinding simulator • The Bond Rod Mill Grindability Test determines the Bond Rod Mill Work Index which is used to determine net power requirements for sizing rod mills The ....

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 )...

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Figure 1: type of ball use Figure 2: the working principle of ball mill In this experiment, the Work Index is calculated from the following equation based on Bond,s third theory equation: ( ) Where = Work index (kWh/ton) = Test sieve aperture (micrometer) = Grindability (g/revolution) = 80% passing size of feed (micrometer) Figure 3: ball mill = 80% passing size of product (micrometer ....

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