Keywords: Ball Mill Work Index, Bond Index, Grindability, Ball grinding, Ore testing, Grinding energy consumption, Physical and mechanical ore properties. Cite this Article Vladislav Valerevich Lvov and Leonid Sergeevich Chitalov, Comparison of the Different Ways of the Ball Bond Work Index Determining, International Journal of Mechanical

The ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index. For grinding circuits where the feed to a ball mill is sent directly to the classifier and the cyclone underflow feeds the ball mill (see Figure 3.10), a question arises as to whether this practice will alter the ball mill work index (BW i) of the material

Similar to a Comparative Work Index, this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a set time. It can be used at mesh sizes from 65 to 200 mesh (normally 100 mesh). The test requires calibration against the standard Bond Ball Mill Work Index test to estimate the Work Index.

particle size are calculated and the Bond ball work index is then calculated using the standard Bond ball work index formula: 𝑊𝑖= 44.5 𝑃0.23·𝑔𝑏𝑝0.82·[10 √𝑃80 · 10 √𝐹80] [2] where W i represents the Bond ball work index, F 80 and P 80 are the feed and product particle sizes,

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 as feed for the Bond Mill.

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 Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory. If you

Where, WioACTis the Actual Operating Bond Work Index (kWh/t), W is the specific energy input (kWh/t), P80 is the 80% passing size of product (µm), and F80 is the 80% passing size of circuit feed (µm). 2. Calculate the Standard Circuit Bond Work Index (WiSTD) for

Here is the old Allis-Chalmers Bond Work Index Grindability Test Procedure. The standard feed is prepared by stage crushing to all passing a 6 mesh sieve, but finer feed can be used when necessary. It is screen analyzed and packed by shaking in a 1000-cc graduated cylinder, and the weight of 700 cc is placed in the mill and ground dry at 250 per cent circulating load. The mill is 12 in. x 12

The article presents the review, studies and classification of the existing methods of the Bond Ball Mill Work Index determination. The scope of the analysis embraces the methods of Aksani and Sönmez, Todorović, Berry and Bruce, Horst and Bassarear, Ahmadi, Kapur, Gharehgheshlagh, Lewis, Magdalinovich, Karra, Smith and Lee, Armstrong, as well JKTech and Aminpro approaches.

Ball 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 Aminpro's method is based on SPI and Bond work index scale-up methods as described elsewhere (Amelunxen & Meadows, 2011). The approach is based on the use of industrial plant audit data and

Jan 01, 2009 1. Introduction. 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 for grinding, and for ball mill

Where, WioACTis the Actual Operating Bond Work Index (kWh/t), W is the specific energy input (kWh/t), P80 is the 80% passing size of product (µm), and F80 is the 80% passing size of circuit feed (µm). 2. Calculate the Standard Circuit Bond Work Index (WiSTD) for

• the bond ball mill work indices determinations gave reasonably reproducible results, • significant variation was observed in the measurement of the bond rod mill work index on at least one sample tested, and • large variations in abrasion index and crushing work index were due to variations in the test method across the laboratories.

The test is designed to give a reasonable indication of the grinding work index of an ore material relative to one or more known standards. It is not applicable to mill tailings material. Basic Equipment Set of screens @ 75 to 2440 micron sizes. Ro-Tap Sieve Shaker Ball mill rolls CMS ball mill No.1 with approximately 10 kg of ball charge distributed as follows: Procedure Crush the known and

Compared to the JC products, the HPGR products showed a better degree of liberation and lower Bond ball mill work index (BWI), although the difference gradually decreased with increasing fineness

The Bond ball mill work index test is thought to be additive because of its units of energy; nevertheless, experimental blending results show a non-additive 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 .

astm ball mill work index standard ironbeneficiation this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a standard specifiTYion sheet for ball mill

Bond Index Ball Mill Rod Mill Bt 100 Xl Retsch. 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

The test determines the Bond Ball Mill Work Index which is used with Bond's Third Theory of Comminution to calculate net power Wi = Bond work index (either Imperial or Metric units) Read more. Bond ball mill work index test; Modified or comparative Bond ball mill index of the SAG Power Index to ore body hardness characterization for

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' product size as P80 and maximum and

For Ore A a Bond ball mill work index value of 17 kWh/t was reported. For ore B a Bond ball mill work index value of 15 kWh/t was used. Further comminution tests will be required in the future to confirm this is representative of the ores to be processed. The bond index values generally indicate that grinding is moderate power consumer.

astm ball mill work index standard ironbeneficiation. Reproducibility Of Bond Work Index With Different Standard Ball uses a pilot scale wet ball mill. Ball Mill Work Index test has been used as a Read more. wet ball mill test wiki Gulin Solutions

pressure grinding rolls (HPGR) products based on a Bond mill test procedure. Multiple trade-off studies have reported the performance of HPGR versus SAG milling with energy savings of between 11 and 32 per cent. One factor that is often inconsistently defined in these studies is the change in the Bond Ball Work Index (BBWi).

Ball 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 Aminpro's method is based on SPI and Bond work index scale-up methods as described elsewhere (Amelunxen & Meadows, 2011). The approach is based on the use of industrial plant audit data and

The aim of this study was to develop a new method for assessing the Bond work index in a ball mill (BBWI), which is based on a first order kinetics present in the Bond ball mill for grinding mineral raw materials (Austin et al., 1981; Ahmadi and Shahsavari, 2009). Theoretical basis of quick procedure

Compared to the JC products, the HPGR products showed a better degree of liberation and lower Bond ball mill work index (BWI), although the difference gradually decreased with increasing fineness

The most widely used parameter to measure ore grindability is the Bond work index, W i [6]. Work index is the energy required in kWh/short-ton to reduce a given material from theoretically infinite size to 80% passing size, 100 microns [7]. The determination of work index using Bond’s method can be compared to the method of

Bond work index value of these components mixtures is greater than the Bond work in-dex of harder components, clinker. Oner (2000) have conducted a research of clinker and blast furnace slag mixture Bond Work Index in different mass propor-tions. He found out that these values are always lower than the Bond Index obtained

COMPARATIVE BOND TEST REPORT ZT64-0692/MM1307 June 2019 Final V1.0 Page 2 2 TEST RESULTS Testing was performed using the standard Bond Ball Mill test methodology on a single blended sample or ore crushed to a feed size of 100% passing 3.35mm. A summary of the media specifications used for each test is given below in Table 2.1.

For Ore A a Bond ball mill work index value of 17 kWh/t was reported. For ore B a Bond ball mill work index value of 15 kWh/t was used. Further comminution tests will be required in the future to confirm this is representative of the ores to be processed. The bond index values generally indicate that grinding is moderate power consumer.

The test determines the Bond Ball Mill Work Index which is used with Bond's Third Theory of Comminution to calculate net power Wi = Bond work index (either Imperial or Metric units) Read more. Bond ball mill work index test; Modified or comparative Bond ball mill index of the SAG Power Index to ore body hardness characterization for

Bond Index Ball Mill Rod Mill Bt 100 Xl Retsch. 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

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' product size as P80 and maximum and

astm ball mill work index standard ironbeneficiation. Reproducibility Of Bond Work Index With Different Standard Ball uses a pilot scale wet ball mill. Ball Mill Work Index test has been used as a Read more. wet ball mill test wiki Gulin Solutions

bond ball mill work index testwork providers chinagrindingmill.net. bond ball mill work index testwork providers (11 Jun 2012) Gulin supply Mining and construction equipment for mineral handling. The crushing, screening, washing

the rod mill and the ball mill. The simplified test method described in this paper is an alternative procedure to the ball mill grindability test. The work index is computed using the following empirical equation revised by Bond in 1960, where the sieve opening at which the test is made, (microns) 358 (2)

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