Minerals Testing and Research Center (MTRC)

Bond Crusher Work Index Bond Abrasion Work Index Bond Ball/Rod Mill Indices J-K Drop Weight Test* SMC Test®* Starkey SAG Design Test* Starkey SAG Variability Test (SVT)* Unconfined Compressive Strength (UCS) Blaine Test Jet Erosion Test Atwal HPGR VRM Dynamic Air Classification FTM

A New Approach to the Calculation of Bond Work Index …

Grinding media influence the energy consumption and efficiency of the grinding process during the calculation of the Bond Work index (BWi), a well-known method for selecting comminution equipment, evaluating milling efficiency, and calculating required milling power. Traditional grinding tests often choose steel balls as the grinding media, but …

Comminution testing to reduce risk

Bond Crusher Work Index; Bond Abrasion Work Index; Bond Ball/Rod Mill Indices; J-K Drop Weight Test* SMC Test®* Starkey SAG Design Test* Starkey SAG Variability Test (SVT)* Unconfined Compressive Strength (UCS) HPGR; VXP *Licensed to conduct this test work at our facility, data is interpreted and results reported by the parent company.

Work Index

The self-grinding work index is an extension of the concept of Bond work index. It generally refers to the work index calculated by using Bond's fracture theory on the principle of ore crushing energy consumption according to the W, F, and P data of a small or semi-industrial or industrial self-grinding test. In this kind of test, McPherson …

Determination of work index in a common laboratory mill …

The present work deals with the impact crusher energy efficiency at San Andres Zeolitic Plant. ... The Bond work index is one of the most useful and interesting parameters used in designing ...

Bond Work Index Procedure and Method

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 application methods are used …

USING THE SMC TEST® TO PREDICT COMMINUTION …

work index covering grinding of fine particles is labelled M. ib (Morrell, 2008). M. ia. values are provided as a standard output from a SMC Test ® (Morrell, 2004. a) whilst M. ib. values can be determined using the data generated by a conventional Bond ball mill work index test (M. ib. is NOT the Bond ball work index). M. ic. and M. ih ...

Investigation into the applicability of Bond Work Index …

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 …

Bond Work Index Tests

The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. The test determines the impact energy at which a specimen fails and allows approximation …

CORRELATION BETWEEN BOND WORK INDEX AND …

The Bond work index is regarded as one of the crushing resistance; it can therefore be presumed that the Bond work index is correlated to the mechanical properties of materials [4]. Literature review on impact crusher performance in relation to machine configuration and operational conditions, by experimental work and mathematical ...

Work Index

Work index is an important material parameter in concentrator design, which is used to determine the specification, number, driving power, and grinding medium size …

Impact work index prediction from continuum damage model …

1.. IntroductionA number of methods have been used to characterize rocks for crusher selection. Perhaps the most traditional is the one proposed by F.C. Bond over 60 years ago (Bond, 1947, Bergstrom, 1985), which is still used today for characterizing material crushability in the minerals industry.The Bond crushing work index is a …

Crushing Work Index for PQ Core sample

The Bond crushing work index test procedure is not terribly well described, and different laboratories have different procedures that can result in different results (by up to -50% +). ... Recently I was dealing with a crusher vendor and they were also reluctant to rely on the crusher work index results we had from the client side. I ...

Compare and Understand Rod/Ball/Impact …

Bond Work Index Formula-Equation

The basic work index equation is: W = 10 Wi/√P – 10 Wi/√F………………………………………………………………………… (1) where W is the work input required in kilowatt hours per short ton to …

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. ... Prev Previous Bond Abrasion Index VS Mohs Mineral Hardness Scale. Next Copper Flotation Recovery Rates of Oxidized Ores Next.

A meaningful expression between bond work index, grindability index …

Literature on impact crusher performance in relation to machine configuration and operational conditions, by experimental work and mathematical modelling is given by Austin et al., ... (S 20) and Bond work index (W i) also has a high correlation of 0.97 and this relationship is given in Eq. (3). (3) W i = 61. 83910. 158 ln (S 20) 6.

(PDF) Impact work index prediction from continuum damage model …

Although not as popular as the Bond ball mill or the Bond rod mill work indices, the impact work index, also called Bond crushability index, continues to be much used for crusher selection. The ...

Bond´s work index estimation using non-standard ball mills

The Bond Work Index (Wi) is a common technique for the estimation of hardness and energy requirement for comminution using ball mills. ... continues to be much used for crusher selection. The ...

Design, Fabrication and Testing of a Double Roll Crusher

The required crushing power is a function of Bond work index, capacity and the reduction ratio. Adopting Gupta and Yan [5] the power is given by, P = Q.R d.w i where Q = crushing capacity, Rd = reduction ratio (x 1 /x 2) and wi = work index. In this work Q = .356 t/hr and x 1 = 7.5mm. A roll gap of 5mm had already been specified and x 2

BOND WORK INDEX TEST BALL MILL

The FC Bond Work Index Test Ball Mill was designed by F. C. Bond for use in determining the Bond Index, a measure of grindability and power required for grinding applications. The FC Bond Mills are used in laboratories throughout the world. A copy of Fred C. Bond's Method of Crushing and Grinding for determination of the Bond Index is …

The Importance of Work Index in Mineral …

The kilowatt-hours per tone (kWh/t) will work out your work index. The number of kittowatts consumed in a hour divided by the tonnes of rock gives you your work index. Remember, the higher the Work Index the more …

Application of Data Analytics Techniques to Establish

Progression of mining into the deeper and harder B2 ore necessitated the installation of Plant 2 in 2008 to meet throughput requirements. This plant contains an in-pit MMD crusher and a SAG mill in circuit with four ball mills and has a nominal plant capacity of 41 Mt/a for a Bond work index (BWI) below 8.7 kilowatt hours per ton (kWh/t).

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.

Impact work index prediction from continuum damage …

The traditional Bond work index proposed by F.C. Bond over 60 years ago is still today a useful tool for characterizing material crushability and grindability in the minerals industry. Although not as popular as the Bond ball mill or the Bond rod mill work indices, the impact work index, also called Bond crushability index, continues to be …

-Average surface bulk temperatures and …

Bond work index grindability values decreased for the vein type copper ore (ore 2) in which fusing of particles was not observed. The largest decrease, i.e. improvement, in the work index (by 13% ...

Using Rock Geomechanical Characteristics to Estimate Bond …

The Bond low-energy impact test, also named impact work index or Bond impact crushing work index, can measure the crushing work index (CWI) and describes …

French Crushability & French Abrasion Index

The Bond work indices (or "impact work index") can be used for estimating the crushability of material and the crusher's energy consumption. The crushability value can be used for estimating the …

A meaningful expression between bond work index, …

The compressive, tensile and point load strengths of bauxite were the highest, as was the work index, indicating that the higher the strength the higher is the …