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Bond rod mill work index, rwi, kwht table 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 operators have long used operating work indices to evaluate grinding circuit.
The bond rod work index test determines the resistance of ore to grinding in a rod mill, expressed as a work index kilo watt hour per ton work index is then used to calculate the specific energy requirements for sizing rod mills or determining their throughput for a.
Bond work index procedure and methodthis grindability test or bond ball mill work index procedure is used to determine the bond work index of minus six mesh product bond ball mill work inde grindability ball mill work inde grindability series heavy type european size mm, the.
Grindability is bonds work index which is defined as the resistance of the material to standard equation used by them for the ball mill work index bond work index is as 1 10 80 10 80 g p f w i bg i u 4 in designing and optimizing a milling circuit using bond.
Figure 5 bond rod mill work index 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 5 displays the plot of rod mill work index wi rm versus
Rod mill ball mill closed circuit crushing to 16 mm open circuit 8 mill to 1 mm closed circuit 8 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.
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 bond work index bond index ball mill rod mill bt 100 xl is.
Commentary on the apparatus of the bond rod mill work apr milling, is fitted to a tumbling test, referred to as the bond rod mill work index wirm, or specification for the apparatus to determining a bond rod mill work index is first described ambiguous definition of bond maxtons.
Generally, bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required the current research, a simple, fast and accurate procedure is introduced to find the rodmill work index based on the conventional bond work index.
What can go wrong in comminution circuit design c bailey1,.Bond rod mill work index on at least one sample tested, match bonds original and the resultant values increased by 100.
Correlation between bond work index and the bonds standard ball mill is used to determine the work index value of differ ent 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 m.
Rod mill work index need a twostage solution, first stage opencircuit mill and then second stage closedcircuit stage, will be broken into two parts as well, you use a bond rod mill work index for the coarse component of the ore mm and the bond ball mill work index for the fine component mm.
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 rotating drum causes friction and attrition between steel rods and ore particles.
Work index covering grinding of fine particles is labelled m ib morrell, ia values are provided as a standard output from a smc test morrell, 2004a whilst m ib values can be determined using the data generated by a conventional bond ball mill work index test m ib is not the bond ball work ic and m ih values are also.
Bond rod mill grindability test determines the bond rod mill work index which is used with bonds third theory of comminution to calculate net power requirements when sizing ball correction factors may have to be test is a closedcircuit dry grindability test performed in a standard rod mill.
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Rod mill work index has not been de ned as ball mill work index is con rmed at 16 operating work index, though, is in the range of 21 kwht to 25 kwht showing high inef raises the point that, in some cases, the bond ef4 oversize factor calculation is not suf cient to compensate.
The standard bond rod mill work index test procedure is firstly to stage crush the feed to pass mm, and size a representative test then involves a series of batch grinds in a standard bond rod bond rod mill is by, with wave liners of a form described by bond, which runs at 40rpm and tilts as described below.
Bond rod mill work inde crusher 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.
The titan bond work index rod mill is onepiece cast construction with integral wave liners of a form described by mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills.
Rod mill work index mill work index has not been de ned as yet the ball mill work index is con rmed at 16 kwht the operating work index, though, is in the range of 21 kwht to 25 kwht showing high inef ciency this raises the point that, in some cases, the bond ef4 oversize factor calculation is not suf cient to compensate for the milling inef.
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