Oct 10 1992 Bond s Standard Work Index SWi indicates the gri ldability of an ore and tis Operamg Work Index OWi indicates the performance of a same or similar ores and in designing new mills Like the 2 primary grinding in closed circuit ball mills with different relationships the flatter slope of the line for …

bond ball mill work index kilowatt hours dry tonne 29 0 sample identity bond ball mill grindability test feed and product sizings variability composite 56 a13575 feed to period equilibrium products client vista gold corporation mt todd feasibility project no a13575…

and aWork Index of11 5kWh t wasfound Not only to15 6kWh t astheapertures ofthelimiting screening wastheWork Index reduced toamorerealistic figure by werereduced from425to150 m TheWork Index then themodified procedure butthenumber ofcyclesrequired increased abruptly to44 2kWh t andnofewerthan44…

3 2 Ball mills The connection between milling work and milling events is subject to Bond work index characteristic line or cumulative distribution …

Kinetic grinding test approach to estimate the ball mill work index 343 The W i parameter is obtained from Bond s ball mill grindability test Bond 1961 This test is performed according to the standard Bond procedure which proposed model is presented in Eq 1 …

limestone bond ball mill work index pdf – ball mill bond work index for limestone – Ore Crusher Ore Ball Mill Bond Work Index For Limestone 187 More ESSA Bond Work Index Mill Abrasion Index to determine the physical properties of ores include the Bond ball mill work index and the Bond rod mill and Bond Index…

Jul 25 2013 Table 13 15 Summary SMC Work Index Statistics Figure 7 4 Typical Cross Sectional View of the Dumont Deposit from Line 8350E – Looking size Bond ball mill work index and modified Bond tests the bulk of the …

May 19 2015 provides a stimulus for developing new fast comminution test From the grinding test the Bond ball mill work index Wi in kWh t is determined 38 0 23 lack of reliable on line information about the condition of the drill bit …

The F C Bond Ball Mill is a small universal laboratory mill used in calculating the grindability of all diameter as shown in the work index Equation 1 C ush iog aDd base line fa h diaEonal lire r lreseots a mesb si4 lenirg sieve wilh an …

Bond designed the work index ball mill with strict dimensional and functional specifications and Based on the literature and grinding data grinding time or the revolutions to be given for the n 1 th cycle of grinding test as 1 1 11 n e n n …

A single SABC line was selected for the grinding circuit with the SAG mill motor rated at 13 4 MW and two ball mills each powered by a 7 MW motor The plant ramp up This ore was stated to have a Bond Work Index of 23 and very high …

Based on different grinding times and the obtained results a new work index equation was then simulated through which bond ball mill with a coefficient of two third and well the slope of fitted line can be considered as the selection …

The Bond work index Wi is used as a measure of grindability of an ore Deniz 2003 Wills and Bond devised several methods for predicting ball mill and rod mill energy requirements and provided From Figure 1 the equation of the line is …

2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up Bond s Law Data zBond work index w i zFeed D f and product d size both 80 cumulative passing Result The specific grinding energy w Mill power draw P wT where T the mill capacity Mill dimensions from Tables or charts …

3 40 Grinding – bonds work index 3 45 Technical data Spherical roller bearing supported ball mills 8 33 The slurry line …

Aug 9 2011 By using three stages of grinding the ball mill can best be employed test is a fine feed substitute for a standard Bond Grinding Work Index test and it This is equivalent to 6 of the largest ball mills in existence 3 per line …

Bonds work index ball mill manufactuering design Ball mill abrasion index sgs minerals services t bond ball mill work index and modified bond work index data can be used in the ceet grinding simulatorthe abrasion test determines the abrasion index which can be used to determine steel MOVE…

The MinnovEX SAG Power Index SPI® test is celebrating its 10th year of industry use as a of the Bond ball mill work index test yellow line in Figure 5 3 …

PDF 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…

Jan 17 2017 How does a modified bond ball mill work index test vary from a Examples are the MinnovEX approach also Smith Lee 1968 error we designed a new Bond test called the MiniBond which has an error of approximately 3 1 Attaching a PDF copy of the presentation sorry it s in a Spanish but …

Bond Ball Mill Work Index and modified Bond determines the Bond Rod Mill Work Index which is used CEET® and JK SimMet for off line investigation of …

Apr 26 2016 Liwhut edu Y L Keywords standard drop weigh test SMC test Bond ball work index test JKSimMet Morrell different comminution circuits i e jaw crusher HPGR mill ball mill jaw crusher ball New Formed …

In this study the effect of circulating load CL and test sieve size P which are inaccuracies of Bond grindability on the Bond ball mill grindability G hg and work index W are investigated based on four samples of natural amorphous silica In the experimental studies the relationships between the Bond work index with circulating…

Ball mill scale up Bond s Law Data as a function of the Bond work index w Line y x Fig 2 Comparison of the ball mill power draw from the Denver …

The ore ball mill bond work index ranges from 8 5 to 12 5 kW hr tonne proximity to the plant the promising new XCELL™ flotation technology and the ready type of plot all data points will fall on the diagonal line when you have a model …

conducted upon Gold Ore Samples from the Mt Todd Project Feasibility Study for Vista Gold Australia Pty Ltd Report No A13575 Part 1 May 2012 The results contained in this report relate only to the sample s submitted for testing ALS Ammtec accepts no responsibility for the representativeness of the sample s submitted …

The work index Wi was defined by F Bond as the specific energy kWh ton required to reduce a using a novel ring mill a laboratory ball mill a labora …

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 SPI R value is known not to be an additive parameter however errors introduced by block kriging are not thought to be significant …

The Bond Ball Mill Grindability Test determines the Bond Ball Mill Work Index used to determine net power requirements when sizing ball mills The test is a closedcircuit dry grindability test It is run in a standard ball mill and can be performed at mesh sizes ranging from 48 mesh to 400 mesh Bond Ball Mill Work Index and modified…

Savings flowing from a single line operation at high tonnage – 1500 to circuiting of the SAG mill and ball mill additions topping the list The drive mill work index for the diorite ore is moderate at 15 kWh t but the Bond rod mill work index …

Bond Ball Mill Test Work Index kWh t Wic ing rod ball milling circuit that was popular circa 1950 to 1980 designed same line they were raised and impact simultaneously on tation Bond Efficiency SLC rev3 print pdf available for …

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 2161 7m x 0 6m length Typical throughput 0 5 3 5 t h…

world It shows that the ball mill work index is normally distributed with an average of 14 6 and a median of 14 8 kWh t bOnd rOd mill GrindAbility The Bond Rod Mill Grindability Test is performed similarly to the ball mill test The feed sample is stagecrushed to 189 and the test is run under a 100 circulating load As in the ball mill…

bond ball mill work index test standard pdf We specialize in crusher and milling machine production and research and development Kinetic grinding test approach to estimate the ball The aim of this study is to develop a new approach to estimate the Bond ball mill work index BBWI using a combination of Bond standard mill and initial test …

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…

Apr 29 2009 1996 the SMC Test® Morrell 2004 and the Bond ball work index line Line 3 consists of one 40 В 22 ft 21 000 kW SAG mill work …

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Sep 30 2013 Logical data analysis and base line data preparation Bond s ball mill work index of the concentrate was found be 13 Kwh short ton d The …

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