bond s rod mill for work

  • Bond Rod Mill Work Index Equipment & Apparatus

    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.Bond Tests Mining SGS,* Bond F. C., “Crushing Tests by Pressure and Impact”, Trans AIME, Vol 169, 1947, pp 58-66. 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.

  • Bond Rod Mill Index Test JKTech

    Bond Rod Mill Index Test. 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 screen. SampleBond Work Index Procedure and Method,Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done: Add about 500 g of silica sand into the mill containing the ball charge. Seal the mill. Rotate for 20 revolutions to clean. Empty the mill charge and sand into the ball try once grinding is complete. Clean out the mill using a brush. Put the lid on the mill.

  • 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 apparatus. The SAGMILLING.COM models expect a mill with a "wave liner", and is not compatible with mills using "smooth liners". Most laboratories outside of Australia use the wave liner style of machine these results can safely be used in the models. Bond rodBond Work Index (Energy equation) Grinding,You need a two-stage solution, first stage open-circuit mill and then second stage closed-circuit mill. First stage, will be broken into two parts as well, you use a Bond rod mill work index for the coarse component of the ore (+2.1 mm) and the Bond ball mill work index for the fine component (-2.1 mm).

  • Bond Index Ball Mill Rod Mill BT 100 XL RETSCH

    At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill. The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work Index (BWI) is used for the range from 2.1 mm down to 100 µm. Adjustment of grinding parameters:Bond Work Index Tests Grinding Solutions Ltd,Bond Rod Mill Grindability Test. Grinding Solutions can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill. The test requires a minimum of 20kg of -12.5mm material. Closing screen sizes typically range from 4.75mm to 212µm. Abrasion Index Test

  • Bond Index Ball Mill Rod Mill BT 100 XL RETSCH

    At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill. The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work Index (BWI) is used for the range from 2.1 mm down to 100 µm. Adjustment of grinding parameters:(PDF) Rapid determination of Bond rod-mill work ,Generally, Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research, a simple, fast and accurate procedure is introduced to find the

  • Bond Rod Work Index Mill 911Metallurgist

    Bond Rod Work Index Mill. Bond Rod Work Index Mill. 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 digitalBond Work Index Tests Grinding Solutions Ltd,Bond Rod Mill Grindability Test. Grinding Solutions can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill. The test requires a minimum of 20kg of -12.5mm material. Closing screen sizes typically range from 4.75mm to 212µm. Abrasion Index Test

  • Bond Work Index an overview ScienceDirect

    The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing 12.7 mm (½ inch, Index, or HGI, which is much the same as the relative ease or difficulty of grinding ores as assessed by the Bond Work Index (Bond, 1961). The HGI is determined by using standard techniques and equipment as described in ASTM D409 (ASTM, 2009), where coal specimens areBond Work Index Rod Mill Titan Process ,The Titan Bond Work Index Rod Mill is one-piece 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 production-size rod mills. Specifications . Size: 12″ x 24″ 40 RPM Charge: 8 rods weighing a total of 33.38 kg. Leave a

  • Rod Mills, How Do They Work? Mine Engineer.Com

    Rod Mills, How Do They Work? Rod mills are very similar to ball mills, except they use long rods for grinding media. The rods grind the ore by tumbling within the the mill, similar to the grinding balls in a ball mill. To prevent the conditions leading to rod charge tangling, the length to diameter ratio is maintained at 1.4 to 1.6. Rod mills accept feed up to about 50 mm (2 in.) and produce aMill (grinding) Wikipedia,with the limits of Bond's range: W is the work index measured in a laboratory ball mill (kilowatt-hours 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. [citation needed] But note that the term 'rod mill' is also used

  • 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 3.35 mm, as required for the Bond Ball Mill Work Index testGMSG GUIDELINE: DETERMINING THE BOND EFFICIENCY OF,Bond Test WI’s (kWh/t): Rod Mill: Ball Mill: 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index: Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19,300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod µ

  • Relationships between comminution J energy and product

    The test work involved Bond ball mill testing, rod milling, low intensity magnetic separation (LIMS), and batch ball milling down to product sizes of around P80~25 microns. A total of 18 Bond tests and over 150 batch grinding tests and sieve sizing were carried out. Throughout the grinding tests, power draw was continuously monitored. The relationship between the grinding energy and productComparison of Ore Hardness Measurements for Grinding Mill,Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1, Bond rod and ball mill work indices are readily converted to pinion energy for rod and ball mills but not for SAG mills. Reproducibility, while not studied in this paper is clearly a part of the meaningfulness of the data presented. It was clear from the data that there are large variances

  • 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 thatComparison of UCS to Bond Work Indices,FIGURE 8: ROD MILL/BALL MILL WORK INDEX RATIO v. UNCONFINED COMPRESSIVE STRENGTH 100 200 300 400 UCS (MPa) 0 0.5 1 1.5 2 WiRM/WiBM (metric) Siddall et al (1996) identified the ratio of Bond rod mill Work Index and ball mill Work Index as being indicative of an ore’s compentency. Figure 8 plots this ratio versus UCS; no trend is apparent

  • bond ball mill index hardness jktech

    bond rod index mills j-fit. Bond Ball Mill Index Test JKTech. 21 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 10 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample toApplication of Operating Work Indices in Autogenous,Bond Rod Mill Work Index, RWi, kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on profitability. Mill operators have long used operating work indices to evaluate grinding circuit

  • 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 adv.bond rod mill work index modified Pro Skip Hire,bond s rod mill for work index Other Case bond s rod mill for work index About Ciros bond s rod mill for work index Key Words: Comminution Tests, Bond Work. read more; Carlisle Goldfields : Reports Positive Metallurgical. 2", blended and a 15 kg test charge was split out for the Bond Rod Mill Work Index Test and 75 kg was separated for

  • QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE

    specification of the Bond mill are given in Table 1. Table 1. Bond's mill specification and grinding conditions Mill diameter, D m, cm 30.48 Mill Length, L m, cm 30.48 Number of mill rotations in minutes, n, min-1 70 Mill balls weight, M b, kg 21.125 Geometry of mill liner smooth Grinding type dry V ore, cm 3 (PDF) Rapid determination of Bond rod-mill work ,Generally, Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research, a simple, fast and accurate procedure is introduced to find the