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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
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
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
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
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
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
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
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
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
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
2011-7-5effective recycle mass in proportion to fresh feed for an initial feed top sie of 35 mm. Ultimate product sie is 80 0.8 mm with up to 60 74 m at a specific power consumption of 1.8 to 2.2 kWht. 1.0 LOS COLORADOS OPERATION IRON ORE The crushing and pre-concentration plant is located near the mine. After rail transport to the
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
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
Mills Technical Data. The following technical data sheets show some of the standard Ball Mills and SAG Mills that we have available.. We can supply Ball Mills SAG Mills and other milling systems to your specific requirements given your particular technical specifications.. The selection and type of mill you require FAG SAG SABC rod or ball is at best difficult and depends on ultimately
Iron ore processing and sale of equipment needed is provided by And its widely used in many practical fields learn more Iron Ore . is the right learn more Garnet Crushing Plant We also style a complete crushing and screening plant for aggregate gravel sand mineral ore in line with the specifiions of buyers. bond work index and grind
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
2017-2-1Bond procedure is followed the Bond work index is relatively consistent anywhere in the world and should be very repeatable 4. Figure 1 shows a histogram of Bond ball mill work index frequency from A.R. MacPherson Consultants ARMC. This database covers a fraction of all the tests performed by ARMC over the years and around the world
Crushing and grinding processes have undergone significant changes over the last 20 years. These adjustments have focused on lowering costs and increasing production and energy efficiency mainly
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
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
2020-3-24Feed Sie Distribution o F. 80. from the t. a. relationship given in the equation below. The feed sie distribution is taken from the JKTech library of typical feed sie distributions and is adjusted to meet the ore specific 80 passing sie predicted using the Morrell and Morrison 1996 F. 80 t. a
2017-12-21Iron Oxides 5.0 1.44 JarositeAlunite - 2.62 Other Gangue - 4.14 For Ore A a Bond ball mill work index value of 17 kWht was reported. For ore B a Bond ball mill work index value of 15 kWht was respectively were obtained at a grind sie of P 80 of 70m at a considerably high mass pull to concentrate 30 wt.
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
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