Bond Work Index Tests Grinding Solutions 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: Bond Low Energy Impact Test The Bond LowEnergy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index The

Testwork: Bond rod mill work index

The Bond rod mill work index is not as common as the Bond ball mill work index, and there are two different variations on the mill apparatusThe models expect a mill with a "wave liner", and is not compatible with mills using "smooth liners"

Bond Rod Mill Index Test | JKTech

Measuring ore grindability in rod mills The Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill It can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions It is a 'locked cycle' test conducted in closed circuit with a laboratory

Bond Rod Work Index Mill 911Metallurgist

Bond Rod Index Mill, 12” x 24” consisting of a one (1) piece cast shell complete with integral wave, 1 Hp 3/60/220 volt motor/gear reducer drive, support frame which allows the mill to tilt +/ 5 degrees during operation and 45 degrees for discharge (manual operation), receiving pan, rod charge and control panel complete with digital revolution counter, start/stop buttons and emergency

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 Metallurgical Testing Laboratory

Bond Tests | Mining | SGS

* Bond F C, “Crushing Tests by Pressure and Impact”, Trans AIME, Vol 169, 1947, pp 5866 Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements when sizing ball mills* Various correction factors may have to be applied

JKTech Laboratory Services JKTech | JKTech

Bond Rod Mill Index Test (BRMWI) A Bond Rod Mill Index Test (BRMWI) is a standard test for determining the Rod Mill Work Index of a sample of ore The BRMWI is a measure of the resistance of the material to crushing and grinding It can be used to determine the grinding power required for a given throughput of material under rod mill grinding

Bond Rod Mill Work Index Equipment & Apparatus Review

Commentary on the apparatus of the Bond rod mill Work Index by Alex Doll December, 2015 [email protected] The Bond “Third Theory” of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond (and his collaborators) were gathering the information to calibrate comminution models

Compare and Understand Rod/Ball/Impact

Relation of Bond rod mill work index and crushing work index Similar to the ball mill work index, the rod mill work index is a tumbling test that includes both attrition and abrasion breakage mechanisms Unlike the ball mill work index, the size of the feed to a rod mill test (10 mm–12 mm) is closer to the size of the crushing test

Comparison of UCS to Bond Work Indices

FIGURE 5: BOND ROD MILL WORK INDEX v UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS (MPa) 5 10 15 20 25 30 35 WiRM (metric) The lack of fit observed relating the crushing Work Index was expected to carry over to the other Bond Work Indices Figure 5 displays the plot of rod mill Work Index (Wi RM) versus UCS These

Bond Index Ball Mill / Rod Mill BT 100 XL RETSCH

The Bond Index conforming rod charge consists of: 6 rods of 125“ diameter and 21“ length; 2 rods of 175“ diameter and 21“ length; The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a waveshaped design At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod

Bond Ball Mill Index Test | JKTech

A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s) Sample Requirements: A minimum of 8 kg of material crushed to nominally minus 10 mm is preferred JKTech would stage crush the sample to minus 335 mm, as required for the Bond Ball Mill Work Index test

Bond Work Index Rod Mill | Titan Process Equipment Ltd

03/10/2015· The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by Bond This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills

Simulating the Bond rod mill grindability test | Request

The Bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling However, the mass of ore required to conduct the test, which can typically vary from

AMIT 135: Lesson 8 Rod Mills – Mining Mill Operator

Bond quantified the rod mill power draw as a function of the Work Index, capacity, and a series of correction factors: P M = W mtest,i F T Q F T = F 1 F 2 F 3 F 4 F 5 F 6

Geometallurgy Wikipedia

The Bond ball mill work index test is thought to be additive because of its units of energy; nevertheless, experimental blending results show a nonadditive behavior The SPI(R) value is known not to be an additive parameter, however errors introduced by block kriging are not thought to be significant

A Method of C alculating Autogenous/ SemiAutogenous

using Bond rod mill work index (RMWI), and Bond ball mill work index (BMWI) However, the author has developed a relationship between the Bond third theory SE values and the AG/SAG SE values to enable the additional power required for AG/SAG milling to be determined AG/SAG inef ciency varies according to the transfer size ﬁ

Orway Mineral Consultants Canada Ltd Mississauga, ON

Bond’s approach consists of determining the ore hardness characteristics, or Work Index (Wi) via standardized laboratory testwork The full suite of Bond comminution tests provide the Ball Mill Work Index (BWi), the Rod Mill Work Index (RWi), the Crusher Work Index (CWi) and the Abrasion Index (Ai) Over the years, it has been determined that

Comminution AMML

Determining the Bond work indexes of a sample involves tests using laboratory scale grinding circuits A unit weight is determined by achieving maximum packing of the prepared ore sample; the unit weight is then fed into the circuit, with undersized product being replaced by

A Method of C alculating Autogenous/ SemiAutogenous

using Bond rod mill work index (RMWI), and Bond ball mill work index (BMWI) However, the author has developed a relationship between the Bond third theory SE values and the AG/SAG SE values to enable the additional power required for AG/SAG milling to be determined AG/SAG inef ciency varies according to the transfer size ﬁ

Bond Ball Mill Work Index (Grindability Tests)

19/05/2013· This video was put together by Joshua Wright and Aldo Vasquerizo as a supplemental lecture for University of Nevada Reno If you have any questions, need advice, or need to conduct a metallurgical

Joshua Wright

SAG Mill Testing Test Procedures to Characterize Ore

The design of rod and ball mills is still carried out with the Bond ball mill and rod mill grindability tests As discussed earlier in this paper, it is important in this case to match the reduction size of the test to that desired from the industrial mill As such, primary ball mills should be designed with the rod mill work index, and single

Testwork: Bond ball mill work index

The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index The test is a 'lockedcycle' test where ground product is removed from test cycles and replaced by fresh feed

CORRELATION BETWEEN BOND WORK INDEX AND

3 STANDARD BOND TESTS The Bond's standard ball mill is used to determine the work index value of differ ent samples The Bond work index is defined as the kilowatthours per short ton required to break from infinite size to a product size of 80% passing 100 µm If the breakage

Mill (grinding) Wikipedia

W is the work index measured in a laboratory ball mill (kilowatthours per metric or short ton) P 80 is the mill circuit product size in micrometers; F 80 is the mill circuit feed size in micrometers Rod mill A rotating drum causes friction and attrition between steel rods and ore particles

Size Reduction and Energy Requirement ScienceDirect

Bond rod mill work index, RW i • –5 mm • Bond ball mill work index, BW i The correlation between coarse particle comminution parameters tends to be rather poor as testing hardness of coarse particles tends to be dominated by breakage through fractures and fissures in

Milling – Rod / Ball Mills including Bond Ball Work

Milling – Rod / Ball Mills including Bond Ball Work / Grindability Index MARC manufactures a wide range of ball and rod mills to suit most metallurgical laboratory applications Our range extends from small 6L jartype mills that are manually positioned on rollers to large 30L size mills Although they do increase the purchase cost of a

O I SKARIN N O TIKHONOV CALCULATION OF THE REQUIRED

methods allowing determination of mill characteristics based on the Bond work indexes of crushing, rod milling and ball milling The authors exemplify the described method application and compare the obtained estimates with the factual field test data The article presents mathematical framework of

Tubular Rod Mills ScienceDirect

During operation of rod mills, rods have to be replaced occasionally as they are subjected to wear and liable to break The replacement rate should be equal to the rate at which rod size deterioration occurs so that equilibrium is maintained Bond determined the equilibrium rod sizes in