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 to process <1/2″ ore samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional …

BOND IMPACT CRUSHING WORK INDEX TESTER

The Pendulum Tester / Bond Impact Crushing Work Index Tester. Working principle Crushing by impact. 76 mm maximum feed size. Test repetition: At least 10, preferably 20 test runs. Adjustable crushing angle; Repeatable crushing …

The following technical note describes the use of the …

However, in this situation the ball mill has to supply this energy and it has a different (higher) work index than the crusher (ie the ball mill is less energy efficient than a crusher and has to ...

Determination of work index in a common laboratory …

work index in a more common lab mill, such as the Denver lab mill (Fig. 2), is investigated. Experimental Equipment and ore samples. A jaw crusher, a roll crusher, a series of DIN sieves and sample dividers were used to prepare the ore samples. A 305- by 305-mm (12- by 12-in.) standard Bond mill, a 305- by I 27-mm (12- by 5-in.) Denver

Roll Crushers | Williams Crusher

How Roll Crushers Work. Roll Crushers are simple in design and construction. These machines are long-lasting, economical, and versatile across many applications and industries. Impact, shear, and compression are necessary for crushing and size reduction. The material enters the crusher and is impacted by the roll as it rotates.

Table of Bond Work Index by Minerals

This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the 911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise. | Table ...

Impact Work Index Procedure

Impact Work Index Procedure This is or was used by to acquire the Impact (AKA Crushing) Work Index for sizing crushers. Use this in complement to the Bond Crushing Work Index Procedure.

Roll Crushers

This chapter deals with the designs and operation of different types of roll crushers. Two main types are indicated. The first type where the rolls are rotated in opposite direction …

Roll Crushers

Single Roll Crushers. Single Roll Crushers are typically used as primary crushers that provide a crushing ratio of up to 6:1. They crush materials such as ROM coal, mine refuse, shale, slate, gypsum, bauxite, salt, soft shale, etc., while producing minimal fines.Designed with intermeshing roll teeth and a curved crushing plate, they are extremely effective in reducing slabby feeds.

Bond Impact Crushing Work Index -Procedure

The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the required open-side settings (jaw crushers and gyratory crushers) or closed-side settings (cone crushers) for a given product size.

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 Work Index calculated from the testing can be used in the design and analysis of ball mill circuits. The test requires a minimum of 10kg of sample that has been stage-crushed to passing size of <3.35 mm. Any ...

(PDF) Impact work index prediction from …

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.

HPGR

Freeport's Morenci operation, for example, commis­sioned a 3.0 x 2.0-m HPGR (called the hydraulic rolls crusher, or HRC) in an expansion mill circuit in 2014. The circuit has a single-line capacity of over 60,000 tpd. with the single HRC having 11.4 MW of installed power, and operating in conjunction with twin MP1250 cone crushers to ...

(PDF) Impact work index prediction from …

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.

Bond Work Index Tests

Roll Crusher

Roll Crushers. In Mineral Processing Design and Operations (Second Edition), 2016. 6.1 Introduction. Roll crushers consist of two or more adjacent rolls placed parallel to each other and rotated in opposite directions. Single roll crushers are also available which rotate a single roll against a fixed breaker plate. Mineral or rock particles placed between the rolls are nipped and …

Distribution of impact (crushing) work index for selected …

Distribution of impact (crushing) work index for selected materials measured using the Bond pendulum (symbols: experimental data; lines: log-normal fit). The traditional Bond work index...

Bond Work Index

The Bond work index (Bond, 1960) is based on Bond's law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger's law. From: Advances in Clean Hydrocarbon Fuel Processing, 2011

Roll Crushers

Roll Crushers are compression type crushers, and were once widely used in mining.They have, within the last 10 or so years, fallen into dis-favor among mining and processing companies. The probable reason is because the large mines require very large crushed product output with minimal cost, makes the roll crusher uncompetitive.

Bond Work Index Tests

GSL offers a range of Bond Work Index Testing from crushability and abrasion to ball and rod mills. For more information on the tests please see below: The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index.

Double Roller Crushers

Double roll crusher is driven by the motor through the pulley or gear shaft opposite two rollers rotate, or were driven by two motors rotate two rollers. Double roll crusher with material by weight and the friction between the roll surface into the crusher and discharge within the broken. Through changes in two double roll crusher roller ...

BOND IMPACT CRUSHING WORK INDEX TESTER

The Pendulum Tester / Bond Impact Crushing Work Index Tester. Working principle Crushing by impact. 76 mm maximum feed size. Test repetition: At least 10, preferably 20 test runs. Adjustable crushing angle; Repeatable crushing results; Safe two-hand operating buttons

Assessing the Precision Rolls Crusher relative to other …

This publication assesses application of the precision rolls crusher (PRC) relative to other conventional breakage methods that utilise different styles of breakage, for the determination of size specific energy.

Assessing the Precision Rolls Crusher relative to other …

This publication assesses application of the precision rolls crusher (PRC) relative to other conventional breakage methods that utilise different styles of breakage, for the determination …

Roll Crushers

This chapter deals with the designs and operation of different types of roll crushers. Two main types are indicated. The first type where the rolls are rotated in opposite direction with one roll spring loaded. Here, the mineral particles are …

Impact work index prediction from continuum damage model …

The present work shows the application of a model that combines measurements of particle fracture energies and a parameter that characterizes material amenability to breakage by repeated impacts in the prediction of the Bond crushability index.

(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.

Impact work index prediction from continuum damage …

The present work shows the application of a model that combines measurements of particle fracture energies and a parameter that characterizes material amenability to breakage …

Impact Work Index Procedure

This is or was used by to acquire the Impact (AKA Crushing) Work Index for sizing crushers. Use this in complement to the Bond Crushing Work Index Procedure. Another Summary Table of various Impact Work Index by Rock or Mineral Type (/metric tonne). Find a referential Rod Mill Work Index Table here.

Bond Impact Crushing Work Index -Procedure

The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the required open-side …