kwh t ball mill

Morrell Method-GMG-ICE-v01-r01 Morrell
· bling mills (kWh/t) Wc Specific energy for conventional crushing (kWh/t) Wh Specific energy for HPGRs (kWh/t) Wi Bond Work Index Ws Specific energy correction for size distribution (kWh/t) WiBM Bond Ball Mill Test Work Index (kWh/t) 3. KEYWORDS Autogenous Grinding (AG) Ball mill Bond Work Index (Wi) Comminution circuit High Pressure Grinding Rolls
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equipment to use to calculate KWh/tPage 1 of 1
· equipment to use to calculate KWh/t. Good day What pieces of equipment should i use to calculate KWh/t. My grinding system has a roll press ball mill and separator. Should i used 1. Just the ball mill roll press separator separator fan and ball mill fan. 2. All in 1 above including elevators. 3. include everything in the system. Reply
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Energy BenchmarkingSMC Testing
· 21.95 kWh/t. From samples taken from the SAG mill feed and ball mill cyclone overflow sizings returned the following values SAG mill feed P80 100 mm. Ball mill cyclone overflow P80 106 microns. A number of samples were taken from the SAG mill feed belt and subjected to SMC Tests and Bond ball mill work index tests. Note that the Bond tests
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Benchmarking Specific Energy Consumption Models
· Ball mill operating work index reduction versus laboratory 5 (microcracking/phantom cyclone effect) Secondary crusher WiO is 18.1 kWh/tonne (versus laboratory determination 27.7 kWh/t). Show details of benchmarking. Benchmarking Bond/Rowland SSBM Circuit Specific Energy ConsumptionTropicana
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GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY
· Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test Work Index of the ore whichapplies over the size reduction range of this circuit) W = 3 150 kW / 450 t/h = 7.0 kWh/t . The circuit's Bond WI Ratio Eff. = 16.1 / 14.4 = 1.12 or 112 . This circuit is performing approximately 12 better than predicted
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Bond Work Index Report Matrix House911 Metallurgist
· Work index of 14.6 kWh/t from the Bond Ball Mill is indicative of a hard ore. The hardness indexes are defined as follows Property Soft Medium Hard Very Hard
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Application of Operating Work Indices in Autogenous
AG/SAG Wio AWio (kWh/t) 28.5 Ball Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWh/t 13.4 Bond Rod Mill Work Index RWi kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations 1 2 ABstrAct Optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have
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Application of Operating Work Indices in Autogenous
AG/SAG Wio AWio (kWh/t) 28.5 Ball Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWh/t 13.4 Bond Rod Mill Work Index RWi kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations 1 2 ABstrAct Optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have
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SAGDesign Test Starkey and Associates Inc.
The SAG mill pinion energy W SDT (kWh/t) and SAG discharge Bond ball mill work index S d-BWI (kWh/t) are then used to calculate the total energy to grind the ore from 80 passing 152 mm to 80 passing the client specified final product size P 80.This information along with the ore specific gravity is used to calculate necessary mill sizes and motor power in industrial applications.
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Benchmarking Specific Energy Consumption Models
· The Morrell Mi model (SMC test recalibrated ball mill work index) was compared to the observed operation of the Tropicana HPGR circuit Model Prediction Survey Actual Difference E secCr 0.52 kWh/t 0.40 kWh/t model 30 high E hpgr 2.83 kWh/t 2.60 kWh/t model 9 high E ball 18.36 kWh/t 16.77 kWh/t model 9 high E total 21.70 kWh/t 19
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Bond Efficiency-GMG-ICE-v1-r04 Determining
· (kWh/t) and WioACTis the Actual Operating Bond Work Index (kWh/t). • If the Wi Efficiency Ratio is 1.0 or 100 the circuit is per-forming with the same efficiency as the Bond Standard Circuit (and the ore Wi = circuit operating Wi) in accor-dance with the correlation that Bond (1962) established between plant operating data and test data
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CLASSIFYING AND GRINDINGPM Technologies
· 75 t/h 18 . 88 t/h. CEM I 52 5N (4140 cm²/g) before. after. 43 t/h 58 . 68 t/h. before. after. CLASSIFYING AND GRINDING. activities and technical detailsbasic equipment 1.700kW ball -mill (Ø3 0m) with 2 nd generation classifier and 500kW roller-pressscope of project project coordination detail engineering and delivery of new
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Energy BenchmarkingSMC Testing
· 21.95 kWh/t. From samples taken from the SAG mill feed and ball mill cyclone overflow sizings returned the following values SAG mill feed P80 100 mm. Ball mill cyclone overflow P80 106 microns. A number of samples were taken from the SAG mill feed belt and subjected to SMC Tests and Bond ball mill work index tests. Note that the Bond tests
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SPECIFIC COMMINUTION ENERGYSMC Testing
· Semi-autogenous (SAG) rod and ball mills. As well as the total specific energy it will also predict the specific energy of the crushing section the HPGR section and the tumbling mill section Predicted (kWh/t) Observed (kWh/t) smctesting 5 Figure 3Measured vs Predicted Specific Energy for Total Comminution Circuit . 0 5 10 15
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GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY
· Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test Work Index of the ore whichapplies over the size reduction range of this circuit) W = 3 150 kW / 450 t/h = 7.0 kWh/t . The circuit's Bond WI Ratio Eff. = 16.1 / 14.4 = 1.12 or 112 . This circuit is performing approximately 12 better than predicted
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JKTech Technical Article
• Grindability as indicated by the bond ball mill work index (BWi) ranged from 10–35 kWh/t with the majority between 15 and 27 kWh/t. No clear relationships in terms A b and/or BWi was identified with geological aspects logged from the drill core such as weathering lithology alteration alteration intensity veining or combinations of these.
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SPECIFIC COMMINUTION ENERGYSMC Testing
· Semi-autogenous (SAG) rod and ball mills. As well as the total specific energy it will also predict the specific energy of the crushing section the HPGR section and the tumbling mill section Predicted (kWh/t) Observed (kWh/t) smctesting 5 Figure 3Measured vs Predicted Specific Energy for Total Comminution Circuit . 0 5 10 15
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JME
· ball mills in producing the final product (particles finer than 74 µm) was 55.38 and 44.62 respectively. That is the SAG mill produces about 10.76 more than the ball mill in the final product. The average consumed energy at SAG and ball mills to produce one ton of final product was 23.16 kWh/t and 36.05 kWh/t respectively.
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SAGDesign Test Starkey and Associates Inc.
The SAG mill pinion energy W SDT (kWh/t) and SAG discharge Bond ball mill work index S d-BWI (kWh/t) are then used to calculate the total energy to grind the ore from 80 passing 152 mm to 80 passing the client specified final product size P 80.This information along with the ore specific gravity is used to calculate necessary mill sizes and motor power in industrial applications.
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JME
· ball mills in producing the final product (particles finer than 74 µm) was 55.38 and 44.62 respectively. That is the SAG mill produces about 10.76 more than the ball mill in the final product. The average consumed energy at SAG and ball mills to produce one ton of final product was 23.16 kWh/t and 36.05 kWh/t respectively.
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PDC Mass BalanceFlotation CIL Rev A 2012 June 20
· Mill Type Ball Mill Engineering Design Number of Trains 2 Engineering Design Number of Mills 4 Calculations Mill Size Dia mm x EGL mm 7 600 x 11 960 TBC by Suppliers Drive kW 14 000 TBC by Suppliers Bond Work IndexBall Mill (Design) kWh/t 16.0 Testwork/Engineering Design Average Tonnage Rate (Each) t/h 1441 Calculations
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Bond Efficiency-GMG-ICE-v1-r04 Determining
· (kWh/t) and WioACTis the Actual Operating Bond Work Index (kWh/t). • If the Wi Efficiency Ratio is 1.0 or 100 the circuit is per-forming with the same efficiency as the Bond Standard Circuit (and the ore Wi = circuit operating Wi) in accor-dance with the correlation that Bond (1962) established between plant operating data and test data
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Mag'Impact® Magotteaux
The perfect tube mill assistant Magotteaux has developed 3 models of vertical shaft impact crushers Mag'Impact® able to cover main applications thanks to the remarkable flexibility and high capacity of the machine. This impact crusher positioned upstream of a ball mill can provide a great benefit regarding specific energy consumption (-5 -15 kWh/t) as well as production improvement ( 10 to
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Grinding Circuit Design for Adanac Moly
to 15.3 kWh/t with an average of 12.5 kWh/t. The variability is a little less than usual with COV at 10 . The lack of correlation of BWi with SPI in this set of samples is very unusual as shown in Figure 1. Normally BWi and SPI increase together with a correlation coefficient
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SPECIFIC COMMINUTION ENERGYSMC Testing
· Semi-autogenous (SAG) rod and ball mills. As well as the total specific energy it will also predict the specific energy of the crushing section the HPGR section and the tumbling mill section Predicted (kWh/t) Observed (kWh/t) smctesting 5 Figure 3Measured vs Predicted Specific Energy for Total Comminution Circuit . 0 5 10 15
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Evaluation and mitigation of cement CO 2 emissions
· The total electricity consumption reduced to 17 kWh/t raw material or less by the adoption of new grinding technology such as the roller-press final grinding system (Shen et al. 2014b). In addition the electricity consumption reduced to 25 kWh/t cement by the use of the combined of vertical and ball mill (He et al. 2017). Taking the clinker
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Bowdens Silver ProjectSilver Mines Ltd
· Crusher work index was in a fairly tight range from approximately 8 kWh/t to around 12 kWh/t whilst Bond Ball Mill Work index varied from a low of 10.6 kWh/t to a high of 24.1 kWh/t. SMC testwork used to determine the suitability of a SAG Mill resulted in A x b values ranging from 32 to 96.9 which indicate the material is suitable for use
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An Overview Of the SmAll-ScAle teStS AvAilAble tO
median are both 14.8 kWh/t which is essentially the same as the ball mill average showing that 'on average' the two indices are identical. However it is common to observe a difference between the rod mill and ball mill values for a given ore type. These differences may be caused by a variation in ore hardness by size (13 mm for RWI and
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Bowdens Silver ProjectSilver Mines Ltd
· Crusher work index was in a fairly tight range from approximately 8 kWh/t to around 12 kWh/t whilst Bond Ball Mill Work index varied from a low of 10.6 kWh/t to a high of 24.1 kWh/t. SMC testwork used to determine the suitability of a SAG Mill resulted in A x b values ranging from 32 to 96.9 which indicate the material is suitable for use
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HARD ROCK CRUSH IT OR LET IT BREAK ITSELF
· Ball mill specific energy kWh/t 20.9 14.8 Pebble crusher specific energy kWh/t 0.10 0.23 Auxiliary specific energy kWh/t 2.50 2.00 1.50 Total Specific Energy kWh/t 25.3 27.5 28.0 The operating cost is based on consumables and the general maintenance cost factored from the predicted capital and does not include labour.
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SPECIFIC COMMINUTION ENERGYSMC Testing
· Semi-autogenous (SAG) rod and ball mills. As well as the total specific energy it will also predict the specific energy of the crushing section the HPGR section and the tumbling mill section Predicted (kWh/t) Observed (kWh/t) smctesting 5 Figure 3Measured vs Predicted Specific Energy for Total Comminution Circuit . 0 5 10 15
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