calculation of specific power consumption of ball


The Power Consumption Calculation of a Ball Drum Mill - IdosiRecently, ball drum mills with transverse longitudinal movement of grinding bodies showed a progress the grinding process intensification. Specific energy consumption for the grinding dropped down to 30%. Current methods of power consumption calculation of a mill drive do not allow determining the power consumption.calculation of specific power consumption of ball,modeling the specific grinding energy and ball-mill scaleup8. Present paper. An effort to develop simple and efficient models for: ○ the calculation of the specific grinding energy 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.Calculation of energy required for grinding in a ball mill .The Bond work index, Wi, as an indicator of the grindability of raw materials is not a material constant but rather it changes with change of size of the grinding product. Therefore, in practice we can expect some difficulties and errors when the energy consumption is determined according to this formula in the case when, for a.

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Modelling SAG milling power and specific energy consumption .

Oct 7, 2014 . ondary ball milling. In these circuits the SAG mill is the largest energy consumer. In many engineering projects either a power equation and/or a specific energy equation are used for the designing of these mills but not always with acceptable results. In general these equations are used to predict power con.

calculation of specific power consumption of ball,

OMC Power-Based Comminution Calculations for Design, Modelling .

power draw. The most frequently used power-based methodologies for calculating energy requirements for comminution circuits using AG/SAG mills are concisely .. crusher/HPGR/AG/SAG/Ball mill circuits. The generic power-based equation for circuit specific energy is shown in Equation 6. For total specific energy in an.

Calculation of the power draw of dry multi-compartment ball mills

May 6, 2004 . In this paper, a new approach for the calculation of the power draw of cement grinding ball mills is proposed. For this . calculate the power that each ball mill compartment should draw. The total power is ... to determine the bulk and specific gravity of the material after a crash stop of the mill. Specific gravity.

calculation of the required semiautogenous mill power based on the .

work index RWI; for finer particles — ball milling work index. BWI (Table). These indexes are readily obtained using the special-purpose laboratory equipment (Fig. 1). Finding the total specific energy consumption in the wet autogenous mill — central discharge ball mill circuit (WAM — CDBM). In the framework of the.

Ball Mill Design/Power Calculation - 911 Metallurgist

Mar 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, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk.

OMC Power-Based Comminution Calculations for Design, Modelling .

power draw. The most frequently used power-based methodologies for calculating energy requirements for comminution circuits using AG/SAG mills are concisely .. crusher/HPGR/AG/SAG/Ball mill circuits. The generic power-based equation for circuit specific energy is shown in Equation 6. For total specific energy in an.

technical memorandum - SAGMILLING.COM

Nov 11, 2015 . 2100 µm. Ball mill work index, WiBM. 2100 µm. 100 µm. Determining Overall Circuit Specific Energy Consumption. To predict the cumulative breakage from a coarse size to a fine size requires doing three calculations using Equa- tion 2, one for each of the three work index measurements and handing-off.

Modelling SAG milling power and specific energy consumption .

Oct 7, 2014 . ondary ball milling. In these circuits the SAG mill is the largest energy consumer. In many engineering projects either a power equation and/or a specific energy equation are used for the designing of these mills but not always with acceptable results. In general these equations are used to predict power con.

DETERMINATION OF CORRELATION BETWEEN SPECIFIC .

electrical 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.

Comminution processes: Basics and application to energy efficiency

Calculation of milling processes from „micro“ to. „macro“. ➢ A lot of . High energy efficiency and, thus, low specific energy requirement for demanded ... Experimental determination of stress energy distribution by ball motion tracking parameters: mill: grinding balls: k = -3, ω. S. = 20.9 s-1 d. GB. = 10 mm product: steel φ. P.

Bond formula for the grinding balls size calculation

Oct 19, 2017 . It is a tabulated value. Wi – specific energy consumption, kW*h/ton; C – the mill drum rotational speed,% of the critical speed; D – the mill internal diameter, m. At result B = 25mm or less necessary to use the correction factor 1.3, i.e. the grinding balls average diameter should be 32.5 mm in the feed mixture.

EVALUATION OF HPGR AND VRM FOR DRY COMMINUTION OF .

type of VRM) than a ball mill circuit for a similar degree of comminution. Key words: comminution; HPGR; VRM; energy efficiency; air classification; ball mill. 1. ... (b) specific energy. The Bond equation [23] was used to estimate the specific energy consumption of a ball mill achieving a similar amount of size reduction to the.

Correlations for the grindability of the ball mill as a measure of its .

Bond ball mill work index (BBMWI),[7] the following equations are used (Bond 1961). W = 10Wi. (. 1. √. P80. −. 1. √. F80. ) and P = T × W (5). On the basis of this equation it is possible to calculate, for example, the specific energy requirement for a given grinding duty, BBMWI, feed size and required product size. It is then.

Experimental investigation of the power draw of tumbling mills in wet .

Increase in mill speed and ball filling leads to a remarkable increase in the amount of the power. Preliminary results show that there is a definite trend between the power and the slurry filling U. Mill power draw is maximum at slurry concentration 60–70% and slurry filling 0.84. An empirical equation was given that fits the.

Nickel ore grinding energy determination - SciELO

Despite all advances obtained in the knowledge of grinding, there is a gap about estimating the specific energy consumption. The laboratorial . Donda (2003) developed a method to estimate grinding energy consumption for ball mills using the iron ore concentrate from the Iron Ore Quadrangle (Minas Gerais, Brazil).

International journal of advanced scientific and . - RS Publication

Therefore there is merit in using appropriate size and number of balls, fly ash, grinding aid and mill configuration to reduce power requirement for clinkergrinding in ball mill.. Conclusions: This study proposes correlationsfor quick calculations, relating submicron/ultrafine particle size expressed in nm;specific surface area, m.

energy savings and technology comparison using small . - CEEC

When calculating the recommended top size ball from Bond's formula (1961) for regrind ball mill . grinding can be achieved at lower energy consumption. In ball .. Brunswick (circle). FIG 2 - Specific breakage rate of Millpebs versus 25 mm media in ball mills. Application. Ore Type. BWI. kWh/t. F80 μm. Bond Ball. Top Size.

calculation of specific power consumption of ball,

TECHNICAL NOTES 8 GRINDING RP King - Mineral Technologies .

Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge. (8.13). The net power is calculated from. Net power KD2.5Le!c./. Watts. (8.14). In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the conical ends. c is the specific.

BALL MILL AND HPGR - Open Collections - University of British .

Specific energy requirements for the proposed HPGR - ball mill circuit and HPGR - stirred mill circuit were determined from a pilot-scale HPGR and stirred mill test, in association with a JK SimMet® simulation. Results obtained from the research showed that the HPGR - ball mill circuit and HPGR - stirred mill circuit achieved.

Planetary Ball Mill Process in Aspect of Milling Energy - Journal of .

[1], and calculated the energy transferred per impact to compare the latter with the experimentally determined electrical/mechanical power consumed. . to study effects of the rotational direction of a pot in a planetary ball mill and its speed ratio against revolution of a disk on the specific impact energy of balls calculated from.

calculation of specific power consumption of ball,

The effect of grinding media performance on milling . - (SciELO) SA

calculate and evaluate specific energy as well as stress intensity under different milling . the parameters of specific energy, power input into the mill, and the production capacity. ... tip speed 6 m/s'. Figure 7—Optimum energy consumption curve in dependence of the grinding media material, bead size and tip speed.

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