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How Ball Mill Ore Feed Size Affects Tonnage & Capacity
26/07/2017· Hard ore Work Index 16 = 100,000/65,000 = 1.54 kwh/t. For the purposes of this example, we will hypothesize that the the crushing index of the hard ore with the increased energy input of 1.54 kw/t reduces the ball mill feed size to 6,500 micrometers. As a result, the mill
Ball Mill Design/Power Calculation 911 Metallurgist
19/06/2015· 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 %
tables of tonnage capacity of ball mills
tonnage capacity knowing ball mill work index . details work principle of vertical row mill vrm. W is the work index measured in a laboratory ball mill raw mill work details; tonnage capacity knowing ball mill Inquire Now; dimensions of 8.5 tons capacity ball mill . China Zenith High Speed Vibrating Ball Mill with Large Capacity . China
Ball Mill Design/Power Calculation
12/12/2016· Ball Mill Power Calculation Example. A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ¼ inch (6350
Bond Work Index an overview ScienceDirect Topics
The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45150 µm (325100 mesh), thus determining the ball mill work index (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of
Mill Capacity Calculation For Ball Mill Ball Mill
Ball Mill Utilisation Capacity Calculation. Ball mill designpower calculation jun 19 2015 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
Correlations for the Grindability of the Ball Mill As a
Ball mills usually operate at 65% to 75% of the critical speed. The critical speed is calculated as under [5]. R r g 2 1 n c (2) 2.1.3 Work Index: Work index is defined as the gross energy required in kilowatthours per ton of feed needed to reduce a very large feed to such a size that 80% of the undersize passes through 100µm screen [5]. The
tables of tonnage capacity of ball mills
Small Ball Mill Capacity & Sizing Table. 14/02/2016· Do you need a quick estimation of a ball mill’s capacity or a simple method to estimate how much can a ball mill of a given size (diameter/lenght) grind for tonnage a product P80 size? Use these 2 tables to get you close. No BWi Bond Work Index
calculation of cement ball mill capacity
· 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 finally the type of circuit open/closed.
Bond Work Index an overview ScienceDirect Topics
The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45150 µm (325100 mesh), thus determining the ball mill work index (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of
Correlations for the Grindability of the Ball Mill As a
Ball mills usually operate at 65% to 75% of the critical speed. The critical speed is calculated as under [5]. R r g 2 1 n c (2) 2.1.3 Work Index: Work index is defined as the gross energy required in kilowatthours per ton of feed needed to reduce a very large feed to such a size that 80% of the undersize passes through 100µm screen [5]. The
how can i calculate capacity of a wet ball mill
how can i calculate capacity of a wet ball mill. In grinding, selecting calculate the correct or optimum ball size that allows for the best and optimumideal or target grind size to be achieved by your ball mill is an important thing for a mineral processing engineer aka metallurgist to do often, the ball used in ball mills is oversize just in case well, this safety factor can cost you much in
C O N S U L T I N G L T D TECHNICAL MEMORANDUM
EF5BM=[ P80+10.3 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 “singlestage ball mill” calculation, the F80 is actually the rod mill feed size (10,000 µm) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 µm to ball
unique design high production capacity ball mill
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 product size as P80 and maximum and finally the type of
PDC & Mass Balance Flotation + CIL Rev A 2012 June 20
Mill Size Dia mm x EGL mm 7,600 x 11,960 TBC by Suppliers Drive kW 14,000 TBC by Suppliers Bond Work Index Ball Mill (Design) kWh/t 16.0 Testwork/Engineering Design Average Tonnage Rate (Each) t/h 1441 Calculations max. tonnage rate mtph 1729 CAL/ENGINEERING DESIGN Solids/Pulp Density % 72 Engineering Design Feed Size, F80 µm 2,000
Comminution Services SGS
• 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
CREATIVE AND SIMPLER HPGR CIRCUITS MAY INCREASE THEIR
Boddington has a design capacity of 35Mtpa (approximately 96,000 t/d) and processes two very hard gold ores with average Bond ball mill work indices (BWi) of 15.1 and 16.6 kWh/t, Bond rod mill work indices (RWi) of 22.8 and 24.2 kWh/t, and JK Axb values of 27.9 and 25.5. The circuit is comprised
Magnetic Separation Techniques to Improve Grinding Circuit
However, the total mill power consumption dropped 8% from an average of 7600 kW to 7000 kW. The mill work index dropped 10 percent from an average of 5.5 kWhr/T to 5.0 kWhr/T. Conclusions This represents a current view of the effects of grinding ball fragments in the milling circuit and the impact on the crushing and grinding circuit. The
Hardgrove grindability index and approximate work index of
Knowing the average Hardgrove index, a calculated work index of 12.88 kW/STPH was estimated using Aplan’s empirical formula. This average work index was less comparable to those of feldspar ores given in the literature. Therefore, the method of Berry and Bruce was used to determine the specific energy and approximate work index. By running a batch drygrinding test in a rod mill, an average
Mill Capacity Calculation For Ball Mill Ball Mill
Ball Mill Utilisation Capacity Calculation. Ball mill designpower calculation jun 19 2015 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
Correlations for the Grindability of the Ball Mill As a
Ball mills usually operate at 65% to 75% of the critical speed. The critical speed is calculated as under [5]. R r g 2 1 n c (2) 2.1.3 Work Index: Work index is defined as the gross energy required in kilowatthours per ton of feed needed to reduce a very large feed to such a size that 80% of the undersize passes through 100µm screen [5]. The
PDC & Mass Balance Flotation + CIL Rev A 2012 June 20
Mill Size Dia mm x EGL mm 7,600 x 11,960 TBC by Suppliers Drive kW 14,000 TBC by Suppliers Bond Work Index Ball Mill (Design) kWh/t 16.0 Testwork/Engineering Design Average Tonnage Rate (Each) t/h 1441 Calculations max. tonnage rate mtph 1729 CAL/ENGINEERING DESIGN Solids/Pulp Density % 72 Engineering Design Feed Size, F80 µm 2,000
C O N S U L T I N G L T D TECHNICAL MEMORANDUM
EF5BM=[ P80+10.3 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 “singlestage ball mill” calculation, the F80 is actually the rod mill feed size (10,000 µm) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 µm to ball
3 easy steps to calculate ball mill capacity
09/03/2016· Step 2. Ball mill drum dimensions. Specify the length and capacity of the drum. If not available, specify the length and diameter of the drum. Step 3 (the final). Grinding bodies. Specify the weight of grinding bodies. You can simply specify a fill ratio for the drum if you do not know the exact weight of grinding bodies. Done!
Grinding Circuit an overview ScienceDirect Topics
The high unit capacity SAG mill/ball mill circuit is dominant today and has contributed toward substantial savings in capital and operating costs, which has in turn made many lowgrade, hightonnage operations such as copper and gold ores feasible. Future circuits may see increasing use of high pressure grinding rolls Rosas et al., 2012). Autogenous grinding or semiautogenous grinding mills
Magnetic Separation Techniques to Improve Grinding Circuit
However, the total mill power consumption dropped 8% from an average of 7600 kW to 7000 kW. The mill work index dropped 10 percent from an average of 5.5 kWhr/T to 5.0 kWhr/T. Conclusions This represents a current view of the effects of grinding ball fragments in the milling circuit and the impact on the crushing and grinding circuit. The
Hardgrove grindability index and approximate work index of
Knowing the average Hardgrove index, a calculated work index of 12.88 kW/STPH was estimated using Aplan’s empirical formula. This average work index was less comparable to those of feldspar ores given in the literature. Therefore, the method of Berry and Bruce was used to determine the specific energy and approximate work index. By running a batch drygrinding test in a rod mill, an average
Calculating Ball Mill Throughput
Ball mill throughput data Gulin MachineryPopular Q A for Ball mill throughput data Q Now knowing the all the bond work wi Read more cement mill throughput calculation 20140825
HARDNESS MODEL AND RECONCILIATION OF THROUGHPUT MODELS TO
work index and the SAG power index. These parameters and plant operational specifications have been used as input information to forecast, the expected throughput and ball mill product size (P80) for each block of ore. Two forecasting techniques have been used, an in house model, strongly dependant of bond work index and MinnovEx´s CEET2, dependant of Bond work index and Sag power index and
C O N S U L T I N G L T D TECHNICAL MEMORANDUM
EF5BM=[ P80+10.3 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 “singlestage ball mill” calculation, the F80 is actually the rod mill feed size (10,000 µm) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 µm to ball
Comminution Services SGS
• 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
Hardgrove grindability index and approximate work index of
Knowing the average Hardgrove index, a calculated work index of 12.88 kW/STPH was estimated using Aplan’s empirical formula. This average work index was less comparable to those of feldspar ores given in the literature. Therefore, the method of Berry and Bruce was used to determine the specific energy and approximate work index. By running a batch drygrinding test in a rod mill, an average
PDC & Mass Balance Flotation + CIL Rev A 2012 June 20
Mill Size Dia mm x EGL mm 7,600 x 11,960 TBC by Suppliers Drive kW 14,000 TBC by Suppliers Bond Work Index Ball Mill (Design) kWh/t 16.0 Testwork/Engineering Design Average Tonnage Rate (Each) t/h 1441 Calculations max. tonnage rate mtph 1729 CAL/ENGINEERING DESIGN Solids/Pulp Density % 72 Engineering Design Feed Size, F80 µm 2,000
Magnetic Separation Techniques to Improve Grinding Circuit
However, the total mill power consumption dropped 8% from an average of 7600 kW to 7000 kW. The mill work index dropped 10 percent from an average of 5.5 kWhr/T to 5.0 kWhr/T. Conclusions This represents a current view of the effects of grinding ball fragments in the milling circuit and the impact on the crushing and grinding circuit. The
CREATIVE AND SIMPLER HPGR CIRCUITS MAY INCREASE THEIR
Boddington has a design capacity of 35Mtpa (approximately 96,000 t/d) and processes two very hard gold ores with average Bond ball mill work indices (BWi) of 15.1 and 16.6 kWh/t, Bond rod mill work indices (RWi) of 22.8 and 24.2 kWh/t, and JK Axb values of 27.9 and 25.5. The circuit is comprised
AMIT 135: Lesson 6 Grinding Circuit Mining Mill
Higher capacity than AG mill grinding; Primary, coarse grinding (up to 400 mm feed size) Grinding media is grinding feed plus 412% ball charge (ball dia.100 125 mm) High capacity (short retention time) Less sensitive to feed composition (critical size material) SemiAutogenous Mill Note the size of the mill: Why does the diameter need to be so big? [image: (13562)] SAG Mill Circuit
Benchmarking: Specific Energy Consumption Models
Tonnage Model 1455 t/h Measured 1600 t/h Difference 145 t/h Difference 9.5% Show details of benchmarking . Benchmarking: Bond/Barratt SAG Mill Specific Energy Consumption Detour Lake. J. TorrealbaVargas, J.F. Dupont, J. McMullen, A. Allaire and R. Welyhorsky, The successful development of the detour lake grinding circuit: from testwork to production. Proceedings of the SAG 2015
How to Calculate Vessel Capacity bulkonline
10/02/2014· hmmm so it means,say the stowage factor is 0.40 cubic mtr per tonne,stow factor being the volume of space per ton and the Net tonnage is 48,018. hence dividing the net tonnage by 0.40 we get 120045 tons which is the cargo carrying capacity of this capesize bulk carrier,
Comminution Circuits Featured Projects DJB
Predictions of mill throughput from a porphyry copper open pit based on comminution test results of 22 composites and the available motor power of a “Standard” SAG Mill/Ball Mill circuit consisting of one 40 ft dia. x 22 ft EGL SAG Mill rated at 24 MW GMD and two Ball Mills, each 26 ft dia. x 40 ft EGL and rated at 16.4 MW GMD. DJB’s inhouse Bond Work Indexbased “Millpower2000
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