INTENSIFICATION OF BOND BALL MILL WORK INDEX TEST THROUGH VARIOUS METHODS

2017 ◽  
Author(s):  
Vladislav Lvov
Keyword(s):  
Ball Mill ◽  
Index Test ◽  
Work Index

scholarly journals A Comparative Study of Energy Efficiency in Tumbling Mills with the Use of Relo Grinding Media

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 735
Author(s):  
Nikolay Kolev ◽  
Petar Bodurov ◽  
Vassil Genchev ◽  
Ben Simpson ◽  
Manuel G. Melero ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Test Procedure ◽  
Mining Industry ◽  
Slight Modification ◽  
Index Test ◽  
Grinding Media ◽  
Work Index ◽  
Mineral Sample ◽  
Tumbling Mills ◽  
Bond Tests

An evaluation of Relo grinding media (RGM, Reuleaux tetrahedron-shaped bodies) performance versus standard grinding media (balls) was made through a series of grinding tests, including a slight modification of the standard Bond test procedure. Standard Bond tests showed a reduction in the Bond ball mill work index (wi) of the mineral sample used in this study when using Relo grinding media. The modified Bond test procedure is based on using the standard Bond ball work index test but changing the circulating loads (350%, 250%, 150%, 100%). The comparative tests with RGM were carried out at the same number of revolutions as the grinding tests with balls at respective circulating load. The RGM charge yielded a 14% higher net undersize product than balls, which hints at improving energy efficiency and the potential for significant mining industry benefits.

scholarly journals Determination of work index of Filin Kokuwa Gold Deposit in Toro Local Government, Bauchi State Nigeria

2021 ◽  
Vol 40 (3) ◽  
pp. 387-392
Author(s):  
D.M. Bwala ◽  
F. Abdulfattah ◽  
O.O. Alabi ◽  
B.O. Adewuyi
Keyword(s):  
Ball Mill ◽  
Reference Sample ◽  
Milling Machine ◽  
Ore Deposit ◽  
Gold Ore ◽  
Sieve Size ◽  
Work Index ◽  
Gold Ore Deposit ◽  
Reference Samples

This report shows the work index of Filin Kokuwa Gold ore sample in Bauchi State, Nigeria. The “reference sample (granites)” were sourced from outcrops of granites around Toro town. The samples were crushed, ground, and pulverized using appropriate laboratory milling machine. 80% passing size for the gold ore and granites samples were obtained at 100μm sieve size for the ball mill feeds and products respectively. The work indexes of reference samples i.e. granites were used to calculate the work index of the Filin Kokuwa gold ore sample. The values of 13.277kWh/ton and 15.192kWh/ton were obtained respectively for the two different reference granites samples used and 14.21kWh/ton as their average which is the value of the work index of the Filin Kokuwa gold ore deposit. The energy required for grinding the ore was found to be 3.581kW.

scholarly journals Investigation of Bond’s Work Index of Korean Desulfurization Limestone by Ball Mill

2016 ◽  
Vol 53 (2) ◽  
pp. 130-139
Author(s):  
Jun-Hyung Seo ◽  
Chul-Seoung Baek ◽  
Woo Teck Kwon ◽  
Ji-Whan Ahn ◽  
Kye-Hong Cho
Keyword(s):  
Ball Mill ◽  
Work Index

scholarly journals A Review of Alternative Procedures to the Bond Ball Mill Standard Grindability Test

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1114
Author(s):  
Vladimir Nikolić ◽  
Gloria G. García ◽  
Alfredo L. Coello-Velázquez ◽  
Juan M. Menéndez-Aguado ◽  
Milan Trumić ◽  
...  
Keyword(s):  
Critical Analysis ◽  
Ball Mill ◽  
Review Paper ◽  
Alternative Methods ◽  
Test Duration ◽  
Computation Techniques ◽  
Work Index ◽  
Simulation Based ◽  
Bond Work Index ◽  
Alternative Procedures

Over the years, alternative procedures to the Bond grindability test have been proposed aiming to avoid the need for the standard mill or to reduce and simplify the grinding procedure. Some of them use the standard mill, while others are based on a non-standard mill or computation techniques. Therefore, papers targeting to propose a better alternative claim to improve validity, to reduce test duration, or to propose simpler and faster alternative methods for determining the Bond work index (wi). In this review paper, a compilation and critical analysis of selected proposals is performed, concluding that some of the short procedures could be useful for control purposes, while the simulation-based procedures could be interesting within a process digitalisation strategy.

scholarly journals A case study of grinding coarse 5 mm particles into sand grade particles less than 2.36 mm

2020 ◽  
Vol 43 (1) ◽  
pp. 56-69
Author(s):  
Aaron Reed ◽  
Larissa Koroznikova ◽  
Manoj Khandelwal
Keyword(s):  
Ball Mill ◽  
Particle Size Analysis ◽  
Process Efficiency ◽  
Size Analysis ◽  
Feed Material ◽  
Industrial Setting ◽  
Work Index ◽  
Work Input ◽  
Index Value

This paper presents the viability study of utilising a rod or ball mill to grind a ‘5 mm grit’ to 100% passing 2.36 mm and fit in with a desired particle size analysis.  The aim is to introduce this grit into the concrete grade sand produced at the Hanson owned Axedale Sand & Gravel quarry to reduce generated waste and improve the process efficiency. A ball mill and rod mill were used to grind the samples at an interval of 5 and 10 minutes. From the laboratory experimental analysis, it was found that a ball mill with 5 minutes grinding time in closed-circuit using a classifier to remove undersize and reintroduce oversize to the mill would be a viable option in an industrial setting. A Bond Ball Mill Grindability Test was undertaken to determine the grindability of the 5 mm grit, which served to determine the power (kWh/t) required to grind it to 100% passing 2.36 mm. The bond ball mill grindability test showed that the grit had a work index value of 17.66 kWh/t. This work index gives an actual work input of 13.54 kWh/t, meaning that for every ton of feed material introduced to the mill, 13.54 kWh of work input is required to grind it to 150 microns.

scholarly journals Variability of the Ball Mill Bond’s Standard Test in a Ta Ore Due to the Lack of Standardization

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1606
Author(s):  
Gloria González García ◽  
Alfredo L. Coello-Velázquez ◽  
Begoña Fernández Pérez ◽  
Juan M. Menéndez-Aguado
Keyword(s):  
Ball Mill ◽  
Sustainable Development Goals ◽  
Raw Materials ◽  
Practical Interest ◽  
Standard Test ◽  
Operational Costs ◽  
Work Index ◽  
Bond Work Index ◽  
Development Goals ◽  
Tumbling Mills

There is no doubt about the practical interest of Fred Bond’s methodology in the field of comminution, not only in tumbling mills design and operation but also in mineral raw materials grindability characterization. Increasing energy efficiency in comminution operations globally is considered a significant challenge involving several Sustainable Development Goals (SDGs). In particular, the Bond work index (wi) is considered a critical parameter at an industrial scale, provided that power consumption in comminution operations accounts for up to 40% of operational costs. Despite this, the variability of wi when performing the ball mill Bond’s standard test is not always understood enough. This study shows the results of a variability analysis (a 33 factorial design) performed to elucidate the influence on wi of several parameters obtained from the particle size distribution (PSD) in feed and product. Results showed a clear variability in the work and grindability indexes with some of the variables considered.

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