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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 .
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. The test is a closedcircuit dry grindability test performed in a standard rod mill.
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.
that the Bond CWi and the standard Bond BM Wi both recorded average values of 8 kWh/t, it was surprising that the Bond Rod Mill Wi average was kWh/t. Since the ore is unusually soft, the Rod Mill Wi is probably irrelevant in determining required power for the SAG mill. Drop Weight Tests
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 mm, as required for the Bond Ball Mill Work Index test feed.
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 ...
bonds rod mill for work index. Federal Records Guide: Alphabetical Index S | National ... Note: This alphabetical index to the Guide to Federal Records in the National Archives of the United States is based on a paper version with the same title compiled in 1995. The index does not reflect updates to the Guide.
Bond Work Index FormulaEquation. See 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.
bond s rod mill for work index. bonds rod mill for work index stone crusher If you want to get more detailed product information and prices, MAC recommend that you get in touch with us through online chat our customer service 24 hours a day . Contact Supplier
A "Bond" rod mill work index is to be determined in an apparatus with a wave liner. The author is aware of four laboratories that offer a rod mill work index test where the lining of the mill is either smooth, or smooth with a small number of primitive lifters that do not constitute a wave liner (one of
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 mm whereas Ball Mill Work ...
Here is a list presented in table form of Rod Mill Work Index as tested/presented by SME handbook of mineral processing, Weiss Editor, 1985.
Oct 03, 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.
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 .
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 .
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.
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.
The standard Bond Rod Mill Work Index test procedure is firstly to stage crush the feed to pass mm, and size a representative sample. The test then involves a series of batch grinds in a standard Bond rod mill. A Bond rod mill is by, with wave liners (of a form described by Bond), which runs at 40rpm and tilts as described below.
Rod life is maximized of rod lengthtomill diameter is maintained between to Rods wear unequally with thin rod formed at the feed end and forming an elliptical shape. Rod .
Bond Rod Mill Index Test | JKTech. 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.
• the bond ball mill work indices determinations gave reasonably reproducible results, • significant variation was observed in the measurement of the bond rod mill work index on at least one sample tested, and • large variations in abrasion index and crushing work index were due to variations in the test method across the laboratories.
ball mill sizing with bond method work index base. Rod mill and AG/SAG mill products are similar and tend to using Bond rod mill work index (RMWI), and Bond ball mill work index (BMWI) However, the author has developed a 127 for the rod mill and 067 for the ball mill The particle size distributions reported are shown in Figure 1 It
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 models expect a mill with a "wave liner", and is not compatible with mills using "smooth liners".
BENCH SCALE COMMINUTION TEST WORK qBond Work Index Testing Bond Ball Work Index Bond Rod Work Index Bond Crushability Work Index Bond Abrasion Work Index qJK Tech Testing JK Drop weight Test SAG Milling Comminution Test (SMC) COMMINUTION PILOT PLANT qAG/SAG Pilot Milling Mill dimensions: Ø x length Typical throughput t/h ...
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