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2020-5-14Bonds work defined the relationship between ore hardness tonnage processed sie reduction achieved and power required. It set the standard for circuit design in the 1950s and it is widely used today although modifications have been made to handle the large increases which have occurred in mill sies feed sies and feed rates
2016-4-262.4. Bond Ball Work Index Test A grinding mill F305 mm 305 mm was used for the Bond ball mill work index test 1821. This ball mill was lled with 285 steel balls total weight of 20.125 kg at an operation speed of 70 rpm. The feed sample was prepared via crushing and sieving giving rise to a sie smaller than 3.35 mm. A particle sie
2015-1-212. Bond Impact Crushing Work Index CWi 3. SAG Mill Comminution SMC 4. Bond Abrasion Index Ai 5. Bond Ball Mill Work Index BWi III. Magnetite Recovery Test 1. Davis Tube Recovery DTR 2. Davis Tube Wash DTW 3. Grind Establishment Test 4. Coarse Liberation Test using ERIEZ L8 separator 5. Grind Sie Optimiation Test using ERIEZ L8
What is Bonds work Index E1 The QA wiki. Bonds work index E1 is the energy required for grinding per unit mass for sand Bonds work index E1 is the energy required for grinding per unit mass for sand Bonds Ammtec. Bond rod mill work index Bond ball mill work index and Bond abrasion index are carried out on sub samples cut
2017-9-13Wi Bond Work Index of the ore Cs fraction of the critical speed and D diameter of the mill inside liners m. Equation 1 demonstrates that larger balls are required to break larger particles. If the feed to a fine grinding mill contains large particles then large balls will
2014-10-1MacPherson correlated Autogenous Work Index AWi. A particle sie analysis of the mill ore charge at the end of the tests provides insight into the build up of critical sied material within the mill. The AWiis used in conjunction with other Bond Work Indices CWi RWi BWi to determine power requirements using Bonds Third Law of Comminution
2019-11-5The ball mill work index Wi kWhshort ton is calculated from the following equation Bond 19611 The mill should be cleaned by either blowing air into it or wiping the interior with a cloth and or brush. The FC Bond ball mill is now ready for the next sample. 1REPRODUCIBILITY OF BOND WORK INDEX WITH DIFFERENT STANDARD BALL MILLS E. Kaya and
2016-7-29crystalline ore. It is not known what work or energy will be required to crush the rock and what grind sie will be required to liberate the iron from the ore at this stage. A purpose fit processing route will need to be developed through ongoing metallurgy. However Athena is confident experiments can be developed to understand the ore how to
2020-4-30From an ore hardness and comminution perspective the majority of South Australian magnetite ores have a rock strength classified as soft to medium with Bond crushing work index CWi values typically 1020 kWht abrasion index Ai values 0.20.6 majority 0.5 and Bond ball mill work index BWi values 1119 kWht
2016-4-259517 .m6 f57 1987 final report for minnesota department of natural resources moa no. 14-09-0070-1260 magnetic belt cobbing technology for upgrading
2018-2-20respect to the effect of ore hardness circuit efficiency grind sie and feed grade. The first energy curve shows the impact of ore hardness as assessed using the Bond work index comparative methodology. Both the Bond work index BWi and the operating work index OWi are presented as separate overlayed curves Figure 1. The BWi is an
Iron ore material was preheated for different time at 1000W in a multi-mode microwave oven. Comparative bond rod mill work index was used to determine the effect of this process on the grinding energy required for sie reduction of the material in a laboratory rod mill
Work input and grindability for the ball mill using the above mentioned of ore grindability are the Bond Work Index. The Bond test work index BWi on the same ore when tests are . dolomite iron ore coal and lienithne by using a variac. Read More
3.5.1. Effect of the test screen sie on work index. The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example the finer the grind sie desired the higher is the kWht required to grind to that sie. Magdalinovic measured the Bond work index of three ore types using different test screen
2020-5-14Bonds work defined the relationship between ore hardness tonnage processed sie reduction achieved and power required. It set the standard for circuit design in the 1950s and it is widely used today although modifications have been made to handle the large increases which have occurred in mill sies feed sies and feed rates
Product sie is a material property that needs to be determined for different ore deposits. The Bonds work index has generally been accepted as a measure of the of an ore. grindability This study used quart as a reference ore via a comparative method to determine the Bonds work index of Baban Tsauni Nigeria ore
2015-12-16may be caused by a variation in ore hardness by sie 12.5mm for RWI and 3.35mm for BWI andor grain sie properties. The Bond rod mill work index is used to calculate the power requirement at intermediate sie i.e. from 12.5mm to about 1mm. The test has been mainly used for the design of rod mills or primary ball mills but it can also be used
2017-1-16 The best operating condition is P80 45 micrometers. At this grind sie the highest iron recovery and grade to magnetic concentrate was obtained. The Bond ball work index at 150 micrometers is 10.9 kWht. This is in the soft range of hardness. The Bond ball work index at 45 micrometers is 12.6 kWht. This is in the moderately soft
A higher Bond work index value was found for the BHJ ore 15.4 kWhton than for the BHQ ore 12.4 kWhton. A decrease in the product particle sie was associated with an increase in the work index value. Single-particle breakage experiments were designed by varying feed particle sie
Physiochemical analysis of Chanchaga ore was investigated in this research work. The techniques involved in the study were sample collection and preparation density determination sieve analysiswork index and chemical analysis of the head sample using X-ray Fluorescence XRF method. The result showed that the most valuable metal in the ore is Cu however other important metals such as Pt
2020-5-18The standard work index Wi100 can then be found from transposed Eq. 16. Comparison with the plant operating work index at product sie P may show that the coefficients .018 and .014 in the last term of Eq. 9 should be altered slightly for the commercial grind. With the proper coefficients Eq
2020-5-8The energy required to grind one tonne of an ore from a given feed sie to a specified product sie is a material property that needs to be determined for different ore deposits. The Bonds work index has generally been accepted as a measure of the grindability of an ore. This study used quart as a reference ore via a comparative method to determine the Bonds work index of Baban Tsauni
The target grind sie of the circuit varies between the 90 - Bond rod mill work index BRWi kWht 17.7. Bond crushing The iron ore in Akunu occur within the subsurface and were found
This step involves breaking up the iron ore to obtain an F 80 grind sie before it can be ground. Once the ore has been crushed it is diverted to a stockpile. The aim of this step is to ensure a smooth crushing process and minimie downtime in the event of a breakdown or to allow planned maintenance in the crushing system without stopping the
Ball mill grinding media calculation in iron ore Ball Mill Instruction Manual PDF - BICO Inc. The F.C. Bond Ball Mill is a small universal laboratory mill used in calculating the made in the Bico Mill rurming at 70 revolutions per minute with a charge of285 iron balls ranging in