Assume the test Wi of the rod mill (9.5) applies from the actual rod mill feed size of 19,300 µm (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 µm) to a rod mill (circuit) product size of 1,000 µm. 10 10 W1( –––––––－–––––––––) (

Learn MoreSee this useful summary Table of Bond Work Index by Minerals. For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the Work Index always means the equivalent amount of energy to reduce one ton of the ore from a very large size to 100 um. The sample was received crushed appropriately for the ball mill test.

Learn MoreRod 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.

Learn MoreBond Work Index Ball Mill. Bond ball mill index test a bond ball mill work index may also be used in the simulation and optimisation of existing mills and the associated grinding circuits 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 test feed

Learn MoreBall Mill Machine For Sale FTM Machinery . ball mill vs rod mill.Similarities.The working principle is basically the same.Regardless of the ball mill or the rod mill, when the cylinder rotates, the grinding media (ball or rod) installed in the cylinder body are lifted to a certain height, and then they are thrown at a certain linear velocity, so the grinding media causes some impact.

Learn MoreThe ball mill oversize feed factor (EF 4 BM) is always calculated with the rod mill work index for the optimum feed size and the ball mill work index for EF 4 BM. The model assumes that the calculated value of E s + the specified contingency is greater than the sum of E sag + E peb ; …

Learn Morerod mill work index has not been de ned as yet. The ball ﬁ mill work index is con rmed at 16 kWh/t. The operating ﬁ work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high inefﬁ ciency. This raises the point that, in some cases, the Bond EF4 oversize factor calculation is …

Learn More· The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific ...

Learn MoreRod Mill Ball Mill Closed circuit crushing to 16 mm Open circuit 8'' dia. rod mill to 1 mm Closed circuit 8'' dia. ball mill to P80 um The ore Test Work Index = Circuit Operating Work Index 9 The Standard Bond Circuit Coarse Ore Bins Fine Ore Bins Screen Crushing Screen Classification Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL ...

Learn MoreOperational work index for grinding plantsScienceDirect The operational work indices: W~oR for the rod mill and W~oBj for each ball mill section are given by Rowland, 1973" PeR PeBj W,oR = Gz Gkj 11.02 FrR k#P~o 11.02 FrB k8o~Pso~ Comm&ution, Classification and Agglomeration C43 Here FTR and FTB are particular application and equipmentrelated ...

Learn MoreA wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80 passing inch 6350 microns. The required product size distribution is to be 80 passing 100 mesh 149 microns. Get Price; Ball Mill Work Calculation Xls. Ball mill work calculation xls Solar Power System Calculation.

Learn Morerod mill ball mill closed circuit crushing to 16 mm open circuit 8 dia.Rod mill to 1 mm closed circuit 8 dia.Ball mill to p80 um the ore test work index = circuit operating work index 9 the standard bond circuit coarse ore bins fine ore bins screen crushing screen classification rod mill ball mill …

Learn MoreBall Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWh/t 13.4 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

Learn More· The rod mill usually uses 50-100mm diameter steel rod as grinding medium, while the ball mill uses steel ball as grinding medium. The length of steel rod is 25-50mm shorter than the cylinder, and it is usually made of high carbon steel with carbon content of 0.8% – 1%; the loading capacity of rod is about 35% – 45% of the effective volume ...

Learn MoreThe 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 models expect a mill with a "wave liner", and is not compatible with mills using "smooth liners".

Learn More· Solved Please Answer All Thanks 1 The Ore Fed To A Rod. 1 the ore fed to a rod mill has a bond work index of 18 kwht1 the p80 of feed to the mill is 22 mm f and the p80 of the product from the mill is 0140 mm p calculate the work in kwtonne required to grind the ore to the product size 2a ball mill with an internal diameter of 2600 mm is operated at 75 of the critical speed

Learn More· 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 …

Learn MoreEssa® Bond Test-Work Equipment. Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index and the Bond rod mill work index. These are empirical indices determined by close circuit grindability tests developed by F.C.Bond in the mid 1930''s.

Learn MoreBond Index Ball Mill Rod Mill Bt 100 Xl Retsch. 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 mill the rod mill work index rwi is used for particle size determination in a size range from 25 mm down to 21 mm whereas ball mill work

Learn More· Figure 6 displays the plot of ball mill Work Index (Wi BM) versus UCS. … identified the ratio of Bond rod mill Work Index and ball mill Work Index as being » More detailed. 3 index bond ball mill – Crushing project, Crusher plant, … also includes the conduct of both the RWi and Bond ball mill work index (BWi) …

Learn MoreJean-Paul Duroudier, in Size Reduction of Divided Solids, 2016. 3.7.4 Performance. Rod mills are used in an open circuit between crushing and the ball mill. They often operate in wet and where the pulp contains up to 50% solid by mass. This machine is equally very applicable to dry where it could take a feed that has achieved 6% moisture.

Learn MoreAt 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: Get ...

Learn MoreIncomplete Question. Please allow me to ask few question, if you can answer them you will know the price without any difficulty: 1) Application of Ball Mill 2) Capacity of Ball Mill (in TPH or TPD) 3) What is the Work Index of Material to be grou...

Learn MoreBond ball mill work index bwi kwht 134 bond rod mill work index rwi kwht 181 table 1 example of agsag 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.

Learn MorePdf A Quick Method For Bond Work Index Approximate, Work index are shown in tables 2 3 and 4 journal of mineral processing 27 12 125132 this study aims to develop a new approach toward estimating the bond ball mill work index bbwi Rod Mill Work Index Table Mineral Processing

Learn MoreHowever, 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 input more energy to do the same amount of size reduction). Hence from equation 7, to crush to the ball mill …

Learn More· Recommendation of ball mill and rod mill Ball mill and rod mill are suitable for different materials 1. Selection by material''s hardness Ball mill has a strong adaptation of material, and it is suitable for grinding hard materials, such as slag, iron ore, copper ore, etc. Rod mill is suitable for grinding brittle material, such as rare metals.

Learn MoreCorrection of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick a …

Learn MoreThe mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble mill AGSAG mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work of a ball mill.

Learn MoreIn conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: • AG and SAG mills. • Ball mills • Rod mills • Crushers • High Pressure Grinding Rolls (HPGR) For detailed ...

Learn MoreA mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes.There are many different types of mills and many types of materials processed in them. Historically mills were powered by hand or by animals (e.g., via a hand crank), working animal (e.g., horse mill), wind or water ().

Learn MoreWork index values crushing, rod mill and ball mill. data from 11 mines located around the world is analysed for correlations between ucs and various wi values. introduction need to accurately predict future mine and mill production rates requires a knowledge of ore grindability well in advance of when ore are actually mined.

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