Mar 19, 2017 ... HP Drawn by Mill @ Pinion. Model 2: Mill dia in feet & power draw in KWh/short ton. Model Input, Model Output. D, Mill diameter inside liners in feet, Wet Overflow Discharge, Kwb, Kilowatts/ (short tonne of balls). Vp, Fraction of mill volume loaded with balls, kW Drawn by Mill at Pinion. fCs, Fraction of critical...

Read MoreJul 20, 2017 ... Ore Work Index, kWh(net) /metric ton. Based on Net ... Specific Energy, kWh/ton. Obtained from Bond's Third Law of Comminution. Net Power Requirement, kW. Number of Mills for the Task. Net kW / Mill. Available ... Fraction of the Total Mill Power Draw contributed by the Interstitial Slurry in the ball charge.

Read MoreMar 17, 2017 ... The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, ... Wi = work index, which is a factor relative to the kwh/short ton required to reduce a given material from theoretically infinite size to 80% passing 100 microns

Read Moreenergy w and. ○ the determination of the mill power draw P. (as a function of the Bond work index w i. ) Use of the above models: For ball-mill scale-up purposes. ... k = 0.106 w i. Thus, the specific grinding energy w is given now from the general expression: 0.193. 0.962. 0.106. i f w w D d. −. = (kWh/short ton). 0.193. 0.962.

Read MoreW is the work (energy) input per ton. ... For example, a grinding circuit is processing 450 t/h (of dry feed) with a mill drawing 3,150 kW (at the pinion). ... For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the Work Index always means the equivalent amount of energy to reduce one ton of the ore...

Read More... and the Ball Mill grindability (Sd-BWI) both in kWh/t, as well as the ore specific gravity.The SAG mill pinion energy is determined from the SAGDesign™ testwork results as follows : WSDT = revs (16,000 + ms)) / (447.3 ms)where : WSDT = AG/SAG Specific Pinion Energy from a F80 of 152.4 mm to a T80 of 1.7 mm, kWh/ton...

Read MoreMay 6, 2004 ... where. Kwb – Kilowatts per metric ton of balls. D – Mill diameter inside liners in meters. Vp. – Fraction of mill volume loaded with balls. fCs. – Fraction of critical speed. Ss. – Ball size factor. To determine the power that a dry grinding needs, full grate discharge mill. Equation 1 is multiplied by the factor of 1.08...

Read MoreWE HAVE A BALL MILL IN COMBI MODE FOR CEMENT GRINDING . ROLLER PRESS ... SUPPLIER HAS GIVEN A BALL MILL MOTOR INSTALLED KW OF 2600 ONLY. PLEASE ... F, Grinding media weight, tons. u, Torque factor. n, Mill speed, rpm. Deff, Mill effective diameter, mts. a, Arm of gravity, -...

Read MoreSpeed” (nc).This phenomenon is called centrifuging. Ball mills usually operate at 65% to. 75% of the critical speed. The critical speed is calculated as under [5]. rR g. 2. 1 nc. - π. = (2). 2.1.3 Work Index: Work index is defined as the gross energy required in kilowatt-hours per ton of feed needed to reduce a very large feed to...

Read MoreEnergy consumption / Ton of cement. Limestone crusher. 2. Raw mix grinding. 23. Coal grinding. 3. Rotary kiln. 28. Ball mill clinker grinding. 40. Packing. 2. Miscellaneous. 2. Total. 100. For a 1.5 million Tons/year cement plant, a very moderate saving target of just 1 kWh/Ton cement @. Rs. 6 / kWh gives annual saving of...

Read MoreVertical Raw Mill. Reducing 30 % of specific power consumption for milling. Compared to conventional ball mill. Waste Heat Recovery. Power generator. Recovering in power of 35 – 40. kWh/t-cli. Recovering heat in exhaust gas into power. Vertical Coal Mill. Reducing 20 – 25 % of specific power consumption for milling.

Read MorekWh per ton.2. After primary and secondary size reduction, the raw materials are further reduced in size by grinding. The grinding differs with the pyroprocessing process (kiln type) used. In dry processing, the materials are ground into a flowable powder in horizontal ball mills or in vertical roller mills. In a ball mill, steel-alloy...

Read MoreYes. Improvements in raw material blending. Calculated from energy savings. 1.0 kWh/ton cement. $2.5/ton cement capacity. Increase of. $0.02/ton cement. New and Existing. Facilities with. LD, PH, PH/PC kilns. Yes. May increase production by up to 5%. Replace ball mills with high efficiency roller mills. Calculated from.

Read Moreelectrical power is used during farine production. In this study, certain measures are implemented in an existing raw mill in a cement factory and the specific energy consumption of the unit is calculated to be 25.52 kWh/ton farine. The effects of ball charge rate, moisture content and size of feeding materials on vibration of...

Read MoreKey words: Ball drum mill Grinding media Material grinding Grinding efficiency Mode of grinding media motion Power consumption Calculation method. INTRODUCTION. For the first time in world practice, Bogdanov (USSR. Hundreds of billions tons of rocks are finely ground drum ill with cross-longitudinal motion of the...

Read MorePower. 50 Amp. 41 Amps. 900 kW. 630 kW. 550 kW. 470 kW. TABLE 2. Power reduction in ball mills using small media at the same charge volume of 25 mm ... Tonnage [TPH]. Mill reduction ratio. Zn-Pb ore - 1250 HP Vertimill - 12 mm media. 830 kW - F80 = 350 - 425 μm. Zn-Pb ore - 1250 HP Vertimill - 50% millpebs mix.

Read MoreThe product from the SAG mill is further reduced in size using pebble crushers and ball mills. Hence, typical gold or copper ore requires between 2.0 and 7.5 kWh per ton of energy to reduce the particle size. Considering a typical mining operation processes 10,000 to 100,000 tons per day the energy expenditure in grinding...

Read MoreOct 10, 2014 ... Working • The ball mill is used for the grinding of a wide range of materials and it copes with feed up to about 50 mm in size. • The material to ... Estimate the power consumption per ton of feed (Ei = 13.1 kW hr mm/ton)? • What will be the product size of the material having reduction ratio of 10? If the energy...

Read Moredensities of about 500 kW per ton of balls. A mill 1 m in diameter and about 1m long would require 2 t of balls, thus requiring an installed power of about 1MW for ball milling. Within these constraints the machine shown in Figs. 7 and 8 was evolved. This machine has the following features: (1) a 1MW drive at a speed...

Read MoreCALCULATION OF THE POWER DRAW OF DRY … ... a new approach for the calculation of the power draw of cement ... electricity consumption for cement ... Kwb – Kilowatts per metric ton of balls D – Mill .

Read MoreMar 3, 2012 ... Fluid mechanics technology „Made in Augsburg“ from the first. Jet Fighter ME 262 to the first ultrafine air classifiers for a fineness of D. 97. < 10 µm. Nr. 4 .... Energy-efficient grinding. Technical data: Alpine Agitated Ball Mill 900 ATR. ▫ Mill diameter: 900 mm. ▫ Mill height: 4,5 m. ▫ Drive unit: 400 kW. G i di bi.

Read MoreAuxilliary Equipment : kW. Total : kW. Power consumed. Ball Mill : kW. Dynamic Separator : kW. Circulating Fan : kW. Bag Filter : kW. Bucket Elevator : kW. Conveying Equipment : kW. Auxilliary Equipment : kW. c) Power Consumed per Ton. Ball Mill : kWh/t. Dynamic Separator : kWh/t. Circulating Fan : kWh/t. Bag Filter : kWh/t.

Read MoreBALL MILL POWER - International Cement Review WE HAVE A BALL MILL IN COMBI MODE FOR CEMENT Please see the attached file and calculate the mill. Get More ... Home > Mill > calculation of motor kw hp of ball mill up to 1200 kw of 60 ton output. calculation of motor kw hp of ball mill up to 1200 kw of 60 ton output.

Read MoreXinhai process optimization helped Antamina mine in Peru achieve improved mill throughput. ... So successful was this collaboration that Antamina is now consistently exceeding its demanding production targets and, at the same time minimizing energy consumption per ton of product when processing hard copper and zinc...

Read MoreAbstract: In determining the proper mill size required to meet a targeted production rate, many factors are evaluated including: length to diameter (L/D) ratio, individual ... This paper examines the effects of changing mill filling degree with respect to specific power consumption (kWh/ton) and product throughput as well as the...

Read MoreFuture Feed. Throughput = 130 - 140. Relative energy intensity /unit metal = 70 - 80. Relative capital cost / unit metal = 100. SAG. Mill. Ball Mill. Screen. Recycle. Crusher. Hydrocyclone. Each block. Integrated Process Model. Grade. Hardness. Fragmentation. Tph. Recovery. Kwh/t. $/t. Value / block. Feed Characteristics.

Read Moreball milling, in that the desired product is obtained at a lower cost per ton. To avoid ... 180 mills in the field with powers from 2 kW for laboratory use to 3880 kW on production units. NCP also carry shell ... When selecting a grinding mill it is necessary to first calculate the amount of power (kW) required to achieve the process.

Read MoreApr 19, 2011 ... coal when compared on an “as delivered kWh” basis using 2011 price levels. Thus the electrical cost ... of electricity for every ton of cement produced is coming down. It is the goal of ... In terms of grinding of raw materials, fuels and cement grinding ball mills are now considered to be outdated technology...

Read Moregrind and hence use more grinding power, between 50 and 70 kWh/tonne (45 and 64. kWh/short ton) for a 3,500 Blaine4 (expressed in cm2/g). (COWIconsult et al., 1993). Traditionally, ball mills are used in finish grinding, while many plants use vertical roller mills. In ball or tube mills, the clinker and gypsum are fed into one...

Read MoreMar 14, 2018 ... Hence, despite all efforts, the derived geometallurgical block estimates remain (largely) inaccurate. The Bond Ball Mill Work Index (Wi) is one such spatial estimate which remains difficult to infer correctly. The Wi defines the specific energy (kWh/ton) required in grinding a ton of ore in the ball mill from a very...

Read MoreThe mass-specific energy is the work required to mill a quantity of product to a desired grinding specification. Mass-specific energy can be relayed in a variety of engineering units such as: Kilowatt hours per pound,; Kilowatt hours per kilogram,; Kilowatt hours per ton,; Kilowatt hours per metric ton (most common).

Read Moregrind and hence use more grinding power, between 50 and 70 kWh/tonne (45 and 64. kWh/short ton) for a 3,500 Blaine4 (expressed in cm2/g). (COWIconsult et al., 1993). Traditionally, ball mills are used in finish grinding, while many plants use vertical roller mills. In ball or tube mills, the clinker and gypsum are fed into one...

Read MoreThe old 4 stage in efficient cyclone preheater kiln, Ball Mill for Coal Mill and Ball Mill for Raw. Mill were having more specific electrical power consumption up to Clinkerisation i.e. 70.18 kwh/ton of clinker and up to cement 95 kwh/ton and thermal specific energy of 860 kcal per kg of clinker. Hence, unit-1 was upgraded with...

Read MoreBulk anode requires 7505 kg of slurry per day, 3753 kg per ball mill load. Ball Mill: 5 ton capacity, 37 kW, with yttria-stabilized zirconia lining and milling media. The other tape cast components are active anode (431 kg/day), backing layer (393 kg/day) and electrolyte (420 kg/day). These each require 0.5 ton capacity, 7.5 kW,...

Read MoreThe Gearless Drive avoids any contact between the rotating mill and the static parts of the motor. This enables a contin- uous workflow without maintenance ..... Ball mill, 21 ft. Our solution: Replacement of an existing 240-t mill and a drive power of 1,100 kW. Technical data: 1,000-t mill with 8,200 kW drive power. The result:.

Read Moreplan of the 130 million ton Ruby Creek orebody together with a mine plan of about 11000 blocks to be mined during the proposed 18 ... hardness of each block in terms of both SAG and Ball milling with allowance for annual periods when the ore is harder to grind. ..... in overall energy requirement per ton milled as grinding...

Read Morerequired per ton. All of this equipment is operated by diesel fuel. Table 4-4 shows the energy requirements for the beneficiation of iron ore. The ball mill requires the most energy and is the most energy intensive equipment in beneficiation. This is due to the ratio of ball-ball hits in the mill versus ball-ore hits. The majority are...

Read Moreto operate as a tertiary and secondary milling application downstream from the traditional ball mills. The move towards manufacturing much larger stirred mills has .... kW-h/ton. 8.17. Table 1. Test work indicated that a 2500 mill would produce 33.8 dry tonnes per hour with an estimated power consumption 8.17kW-h/t.

Read MoreLow ratio of reduction in ball mills. EF8. Rod milling. After Bond apud Rowland it is possible to determine the power that rod mill should draw in terms of the characteristics of the equipment, its rotating speed and the volume occupied by the rods, as per Equation (5). (5). Where. : Kilowatts per metric ton of rods. : Mill diameter...

Read MoreSep 25, 2017 ... elements (reagents) for ore grinding process at the Ball Mill plant are electric power and two brands (60mm steel ball of company 1 and 2). The cost of Ball Mill power usage is given as US$ 0.17 for kilowatt hour per ton of ore milled whiles the company 1 and 2 steel ball brands cost US$1237 and US$1338...

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