The Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a pre-defined media and ore charge. The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits The test requires a minimum of 10kg of sample that has been stage-crushed to 100 passing size of 3.35 mm.
Get PriceThe Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a pre-defined media and ore charge. The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits The test requires a minimum of 10kg of sample that has been stage-crushed to 100 passing size of 3.35 mm.
Read Morein the design of a grinding circuit. The Work Index is used when determining the size of the mill and grinding power required to produce the required ore throughput in a ball mill. 2. Procedure 2.1. Bond Ball Mill Grindability The sample was crushed to 100 passing 6 mesh 3.35mm, from this a 700 cc volume was measured and weighed to be used ...
Read MoreDec 12, 2016 The basic parameters used in ball mill design power calculations, rod mill or any tumbling mill sizing are material to be ground, characteristics, Bond Work
Read MoreJan 01, 2013 To calculate the Bond work index Wi in a standard laboratory scale rod-mill, Bond derived the following equation 1 W i 62 P i 0.23 G i 0.625 10 P - 10 F kw h sh t where F is 80 passing size of original feed, P is 80 passing size of circuit product and Pi is the test-sieve size in m.
Read MoreBonds Work Index Ball Mill Manufactuering Design And Bonds. Milling Equipment bonds work index ball mill manufactuering design and bonds - A class of machinery and equipment that can be used to meet the production requirements of coarse grinding, fine grinding and super fine grinding in the field of industrial grinding. The finished product can be controlled freely from 0 to 3000 mesh.
Read MoreJan 15, 2018 The Bond Ball Mill Work index BBWi is the industry standard procedure for assessing the grindability of ores. The test involves conducting a locked-cycle grinding test using Bonds standard mill design. The locked-cycle test enables a batch process to emulate the grinding behaviour of a continuous mill with a 250 recirculating load.
Read MoreOct 14, 2009 For ball milling, Bond 1961 developed a dry lockedalso cycle test- similar to that for rod milling. In this case he used a 12-in.-diameter, 12-in.-long batch mill with rounded corners and smooth liners, running at 70 rpm see Figure. The4 mill is charged with a
Read MoreEF5BM P8010.3 1.145 P80 3 The EF4 formula requires both the rod mill and ball mill work index rod mill Wi is used to calculate the optimal feed size and because this is a single-stage ball mill calculation, the F80 is actually the rod mill feed size 10,000 m from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 m to ball
Read MoreBond Test WIs kWht Rod Mill Ball Mill 9.5 kWht.8 9 kWht . Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19,300 m although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m to a rod
Read Morepuritic ore, calculated Bond work index is higher with different circulating loads, the Bond work index is higher with lower circulating loads. The purpose of this study to determine the effects of circulating load CL and test sieve size P on the Bond ball mill grindability Ght, and work index W, with natural amorphous silica.
Read MoreBall Mill power, kW 40596 39318 40006 Pebbles power, kW 806 806 868 Pso, liD 181 186 193 EsAC 5.72 5.53 5.22 Eaalls 10.17 9.51 8.97 Aminpro Aminpros method is based on SPI and Bond work index scale-up methods as described elsewhere Amelunxen amp Meadows, 2011. The approach is based on the use of industrial plant audit data and
Read Morein terms of SAG power index, SPI for SAG grinding and Bond Ball mill work index, BWi for ball mill grinding. A further measure, the Minnovex crusher index, Ci was also measured for use in the CEET program to determine SAG mill feed size Kosick and Bennett, 2001. The SPI values varied from 13.5 to 107 minutes with an average of 53 minutes.
Read MoreOne of the methods for the design of a ball mill is Bond method. In this type of machine operating conditions are critical and any change affects your design.
Read MoreIn the case of ball mills, this is certainly not straightforward. Let s consider a simple example the most common tumbling mill test used in the lab is the Bond ball mill grindability test, used for nearly 70 years to determine the Bond work index, which is a number used to estimate how hard it will be to grind the material of interest.
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Read MoreWiBM is the Bond ball mill work index, unitless CFnet is an empirical adjustment to a ball mill circuit CFnet 2.35 - 0.29 lnP80 Morrell Mi model Morrell 2008 published a two-parameter model based on two equations 3 amp 4 to describe a variety of comminution devices, including single-stage SAG and AG mills. The CEE
Read MoreJul 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 3.35 mm as the Bond Ball Mill Work Index test.
Read MoreFirst, a Jar Mill grindability test requires a 5 lb. 2 kg sample and produces a direct measured specific energy net Hp-hrt to grind from the design feed size to the required product size. The second test, a Bond Work Index determination, results in a specific energy value
Read MoreFor the ballmill scale up, the Bond work index - i together with the feed and product size w 80 cumulative passing were used for the estimation from Bonds law of the specific grinding energy From the specific grinding energy w. kWhshort ton and the design w tonnage rate capacity T short tonh, the total mill power draw is ...
Read MoreIt is the inner sacrificial wear liner that sits on the cone head. Concave Sits in the upper frame of the crusher to protect it from wear. It is the outer sacrificial wear liner that sits inside the upper frame. They are the mainly crusher replacement parts. Because of the working conditions, manganese steel is the standard material choice for those liners.
Read MoreUsing the Bond work index to measure operating comminution efficiency C. A. Rowland 1 Mining, Metallurgy amp Exploration volume 15 , pages 32 36 1998 Cite this article
Read MoreStandard size ranges and the related Bond work indexes Feed size F 80, m Product size P 80, m Work index 100000 10000 crushing CWI 10000 2100 rod milling RWI 2100 100 ball milling BWI Fig. 1. Laboratory equipment used by RIVS for determining the Bond work
Read MoreIV. Conclusions and Recommendations A sample ore was given and was crushed then underwent a series of grinding to achieve a 250 circulating load. The Bond work index was determined to be equal to 41.38 kWhtone. It is recommended that future researchers carefully handle the samples and use equipment such as the Ro-Tap sieve shaker instead of manual labor to avoid decrease in sample ore.
Read MoreBall mill calculation xls Henan Mining Machinery Co Ltd. Ball Mill Design Power Calculation The basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index bulk density specific density desired mill tonnage capacity DTPH operating solids or pulp density feed size as F80 and maximum chunk size ...
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