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The Bonds BallMill Work Index is a measure of the resistance of the material to grinding in a ball mill. This Index is widely used in the industry for comparing the resistance of different materials to ball milling, for estimating the energy required for grinding and for ball mill scaleup.
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Bond ball mill. 5 october 2015. labpilot plant equipment. this 12 x 12 ball mill is universally used for grindability testing and determination of the bond work index. mill comes complete with ball charge, and control panel with automatic revolution counter. leave a reply cancel reply.
The standard bond ball mill work index test procedure is firstly to stage crush the feed to minus 3 35mm and size a representative sample the test then involves a series of batch grinds in a standard bond mill a bond mill is 0 305m by 0 305m with rounded corners a smooth lining and runs at 70rpm the charge consists of 285 balls weighing a ...
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 quotwave linerquot, and is not compatible with mills using quotsmooth linersquot.
Micrometers in size. according to the bond standard procedure, the work index is determined by simulating a dry grinding in a closed circuit in the bond ball mill to achieve 250 circulating load bond, 1949, 1952, 1961. the test is performed on a raw material approximately weighing 10 kg, which coarseness is 100 3.327 mm.
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 18 the spir value is known not to be an additive parameter, however errors introduced by block kriging are not thought to be significant.
In 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.
Concentrate comprises almost pure, relatively coarse, lead sulphide galena derived from a very simple metallurgy.a low bond ball mill work index of 8.4 to 212 microns cost milling.scope for heavy medium separation of quartz and calcite waste rock at 12.5mm recognized.
Kinetic grinding test approach to estimate the ball mill work index 343 the w i parameter is obtained from bonds ball mill grindability test bond, 1961. this test is performed according to the standard bond procedure which proposed model is presented in eq. 1.
Ball mill sizing with bond method work index base. application of operating work indices in autogenous bond 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 alternate method to correct for the transfer size effect the method has similarities to the phantom cyclone technique as it is also based on the ...
3 standard bond tests the bonds 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 181m. if the breakage
Bond ball mill grindability test christina. 202053bond ball mill work hardness jktech. jktech laboratory laboratory servicesthe standard bond rod mill work index test procedure is firstly to stage crush the feed to pass 127 mm and sie a representative sample the test then involves a series of batch grinds in a standard bond rod mill a bond rod mill is 0305m by 0610m with wave liners of a form ...
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 qagsag pilot milling mill dimensions 2161.7m x 0.6m length typical throughput 0.5 3.5 th depending
The test work will entail industry standard tests such as the bond rod mill work index, bond ball mill work index, jkdwi tests and then some specific batch mill tests. the results of the test work will then be used to determine the parameters required for simulation. the simulation can then be used to size an entire comminution circuit ...
The sag trommel undersize flows into a common sump shar ed with the ball mill. ... mill power requirements based on the ab and bond ball mill work index
Ball mill design requires a bond work index, bwi, for ball mills at the correct passing size sag mill design requires an appropriate sag test, for example, spi chapter 5 flotation design needs a valid measure of kinetics for each sample, including the maximum attainable recovery and rate constants for each mineral chapter 12 .
Ball mill bond work index for limestone. 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 ...
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Hgt gyratory crusher. bond work index ball mill . jan 21 2015 work index crushing 26 may 2013 bond ball mill work index test standard pdf grinding mill gulin least news construction waste crushing plant for sale in australia bonds crushing law and work index what is bonds law of crushing answers where kb is a constant that depends on the type of machine and on the material being
Perform a bond ball mill work index determination of the desired sample at any closing size, in this case is new afton ore at 150 181m. 2. compute the new k coefficient using equation 5 above. the p80 and f80 values are obtained from the screening result. an exponent of 0.56 will be used for the calculation.
Figure 6 bond ball mill work index v. unconfined compressive strength 0 100 200 300 400 ucs mpa 5 10 15 20 25 30 wibm metric figure 6 displays the plot of ball mill work index wi bm versus ucs. still no relationship is observed.
Wibm bond ball mill test work index kwht wic bond impact crushing test work index kwht wioact actual operating bond work index determined from measurements on the circuit kwht wirm bond rod mill test work index kwht wistd standard circuit bond work index expected or designed used for circuit design. specific energy requirement at ...