grinding relationship between bond abrasion and bond work index

Relationship between Bond Abrasion and Bond Work

2021-11-9 · Typically we work with Bond Ai for specifying our equipment into the mining industry. The relationship between Bond Ai and Bond Work index as I understand is the higher the number on the Bind Work Index the more abrasive the material is.

CORRELATION BETWEEN BOND WORK INDEX AND

2014-6-27 · correlation between the abrasion value(X2) and work index (Wi) is found to be Wi = -1.8 Ln (X2) + 11.5 with correlation coefficient of 0.80. KEYWORDS: Bond work index ± Mechanical properties of rocks ± Grinding energy- Crushing resistance 1- INTRODUCTION Comminution in a mineral processing plant, or mill, involves a sequence of crushi ng

Bond Work Index - an overview | ScienceDirect Topics

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...

Relationship between Bond's work index (Wi) and

2002-9-1 · The present work seeks to establish a relationship between Bond's work index (W i), indexes n (uniformity constant), and K (rate constant) from the theory of grinding kinetics so that by collecting and analyzing only bygone data, a decision could be taken out about the size of the mill.

Relationship between Bond's work index (Wi) and

Relationship between Bond's work index (W i) and uniformity constant (n) ... Abstract. In the theory of grinding kinetics, the grindability of a material is the only factor used to determine the required size of a grinding machine. So for users of the Tower mill, this grindability is expressed through Bond's work

Comparison of Ore Hardness Measurements for Grinding

2021-1-14 · standard Bond crushing, and rod mill work indices, abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed, and Standard Autogenous Grinding Design (SAGDesign) Tests, patented by Outokumpu. (See reference 8 below). The comparison of these results gives context to how the various measurements relate to each

Bond Abrasion Index Tester - 911Metallurgist

2021-11-24 · Bond Abrasion Index Test Machine. The Bond Abrasion Index, devised by F.C. Bond in the 1940‘s, quantifies the abrasivity of an ore. The index can be used to calculate metal wear rates in crushers and ball consumption rates in ball mills. Category: Comminution Testing Equipment in Mineral Processing. Description.

Crushing work index Calculation - Crushing, Screening ...

2021-11-20 · The Bond crushing work index test (sometimes called the "impact work index" test) is noisy, and the difference you observed is perfectly reasonable. The paper by Angove & Dunne (1997) reports a standard deviation in crushing work index tests across laboratories as 4.5.

THE INFLUENCE OF GRINDING MEDIA HARDNESS ON

2020-4-2 · Relationship between abrasion index and brinell hardness . 45 ... The influence of grinding media hardness on an abrasion index has been investigated using the Bond abrasion test method. A porphyry ... formance of the grinding media. Work index values change as the reduction ratip changes, in­ ...

Bond Work Index - an overview | ScienceDirect Topics

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...

A New Approach to Bond Grindability and Work Index ...

The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power.

Kinetic grinding approach procedure for BBWI calculation ...

The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial ...

Table of Bond Abrasion Index for Varied Minerals-Materials

2015-10-8 · Table of Bond Abrasion Index for Varied Minerals-Materials. The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. Bond developed the following

Investigation into the applicability of Bond Work Index ...

2015-10-15 · The samples used in this work are either routinely co-fired in coal fired power plants or have been used in biomass co-firing trials, as illustrated in Fig. 1.Portuguese wood pellets (mainly pine with a small amount of eucalyptus), Spanish olive cake (a residual waste mix from olive oil production formed of powdered olive pulp (0–850 μm), olive pips (850–3350 μm) and olive pellets/self ...

Effect of magnetite content on Bond work index and ...

2018-4-28 · Bond work index and magnetite percent were investigated in the 430 blasts in the mine. This investigation not only confirmed the small scale blasting results, but also showed that increasing the magnetite percent up to 50% noticeably reduces Bond work index and energy consumption in the grinding process.

Comparison of UCS to Bond Work Indices

FIGURE 1: BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS, MPa 10 20 30 40 50 WiC (metric) The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS. There is no generalised relationship between the two parameters over the global data set.

Orway Mineral Consultants Canada Ltd. Mississauga, ON ...

2014-10-1 · delineating size between coarse and fine grinding is 750 µm. SMC test results are used to determine the Drop Weight Index (DWi) and the coarse ore grinding index (M ia). Test data from the Bond ball mill work index test is used to calculate the fine grinding index (M ib). The M ia and M ib indices are used to calculate specific energy for the ...

Investigating of the effect of ore work index and particle ...

2016-4-1 · The amount of feed was set at 1175 g, which was proportional to industrial scale.The ball mill speed was constantly set at 76.8% Cs.Experiments were conducted at different ball sizes (between 20 and 40 mm), grinding time (10–30 min), solids content (65–80%) and work index of copper sulphide ore (12–15.4).RSM and Box–Behnken design were used for the experimental design and modeling of ...

THE INFLUENCE OF GRINDING MEDIA HARDNESS ON

2020-4-2 · Relationship between abrasion index and brinell hardness . 45 ... The influence of grinding media hardness on an abrasion index has been investigated using the Bond abrasion test method. A porphyry ... formance of the grinding media. Work index values change as the reduction ratip changes, in­ ...

(PDF) Kinetic grinding test approach to estimate the ball ...

The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power.

Grinding Size Estimation and Beneficiation Studies Based ...

2016-12-27 · Gamal, 2012). The Bond work index is regarded as size reduction resistance. It can therefore be presumed that the BWI is correlated to the physical and mechanical properties of materials (Mwanga et al., 2015). The number of grinding stages and necessity of intermediate grinding can also be predicted together with evaluating BWI

Conduct and precision of Bond grindability testing

The evaluation of breakage tests and survey data revealed the following; the Bond work index obtained for the current ore ranges between 17.20 - 18.70 kWh/t compared to 14.50 - 16.50 kWh/t which ...

Comparison of UCS to Bond Work Indices

FIGURE 1: BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS, MPa 10 20 30 40 50 WiC (metric) The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS. There is no generalised relationship between the two parameters over the global data set.

Correction of Bond Ball Mill Work Index Test for Closing ...

2018-12-7 · The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis to another. The proposed model consists of two components, the variable coefficient that is determined from a specific work index determination and a fixed exponent determined by a

Achievement of High Energy Efficiency in Grinding Mills

2018-2-20 · Droptest, Bond work index (Ball and rod), crushing work index (CWi), UCS and AI. The important observations from these tests are: • The JK parameter Axb is consistent across the orebody except for a low competency zone in the upper north, and

Mining wear and corrosion test facility

2021-11-22 · Pilot-scale grinding mill: 24” diameter x 36" long designed for studying wear and corrosion in grinding mills; Bond work index (standard ball) Mill: determining the Bond Work Index, dry mill grinding wear testing; Weld cladding and wire-arc additive manufacturing (WAAM) systems

Investigating of the effect of ore work index and particle ...

2016-4-1 · The amount of feed was set at 1175 g, which was proportional to industrial scale.The ball mill speed was constantly set at 76.8% Cs.Experiments were conducted at different ball sizes (between 20 and 40 mm), grinding time (10–30 min), solids content (65–80%) and work index of copper sulphide ore (12–15.4).RSM and Box–Behnken design were used for the experimental design and modeling of ...

(PDF) A comparison of wear rates of ball mill grinding media

abrasive and impact wear due to their large. (75 – 100 mm) dia meters. Ball mill balls. experience a greater number of impacts, but at. lower magnitude than SAG mill balls, due t o. the smaller ...