Welcome to the high-quality mining machines zone!
The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 336 mm 6 mesh to product size in the range of 45150 m 325100 mesh thus determining the ball mill work index wi b or bwi the work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of interest or by chaining individual work index calculations
The bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed it provides the bond ball mill work index which expresses the resistance of material to
Bond ball mill grindability test the test determines the bond ball mill work index which is used with bonds third theory of comminution to calculate net power requirements various correction factors may have to be applied w wi 10p 10f where w net power consumption in kwht wi bond work index either imperial or metric units
The bond work index is a measure of ore resistance to crushing and grinding and is determined using the bond grindability test its value constitutes ore characteristic and is used for industrial
This knowledge is essential to define the required ball mill layout and production capacity in order to perform the bond index test successfully it is necessary to use precrushed sample material as defined below module ball mill minerals precrushed to 335 mm and sieved drillcore precrushed to 335 mm and sieved half drillcore precrushed to 335 mm and sieved the bond index conforming ball charge consists of 43 x 145 balls 67 x 117 balls 10 x 1 balls
For every bond ball mill work index test carried out at jktech a standard report is issuedthe report details the bond test procedure method and presents the results including f80 p80 grindability and work indexfurther interpretation of the results is available if requiredfrequently asked questions bond ball
Jan 01 2009 a bond ball mill work index test is a standard test for determining the ball mill work index of a sample of ore it was developed by fred bond in 1952 and modified in 1961 jkmrc co 2006 this index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required
The bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed it provides the bond ball mill work index which expresses the resistance of material to
Josefin y doll ag 2018 correction of bond ball mill work index test for closing mesh sizes procemingeomet 2018 14th international mineral processing conference 5th international seminar on geometallurgy 2830 november santiago chile 112
The test requires at least 10 particles of 75 50 mm ore however for more representative results it is recommended that over 20 particles are tested bond ball mill grindability test the bond ball mill work index bbwi test is carried out in a standardised ball mill with a predefined media and ore charge
Jul 30 2020 an improved method using less mass compared to the bond ball mill work index test the jk bond ball mill jkbbm test is a locked cycle grindability test conducted using a standard laboratory bond ball mill with the same steel ball charge and material feed size 100 passing 335 mm as the bond ball mill work index test
Gmsg guideline determining the bond rod mill work index test for these purposes chose a o closing screen for the ball mill test one standard square root of 2 series mesh size coarser than the plant ball mill circuit p80 if between standard mesh sizes the finer of the chose two results of bond ball mill tests conducted with closing
Kinetic grinding test approach to estimate the ball mill a simple yet practical alternative for the standard bond methodkeywords work index bond method kinetic grinding test grindability ball mill introduction the standard bond 1952 1961 method is widely used in
Dec 04 2020 the laboratory procedure for running a bond ball mill work index test requires that the operator choose a closing screen sieve size the instruction is to choose a sieve size that results in the
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
Copyright © 2020 Fionca Machinery Company All rights reservedsitemap