﻿ power draw calculation ball mill

## power draw calculation ball mill

• ### Ball Mill Design/Power Calculation

The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution. The following shows how the size or select the matching mill required to draw this power is calculated

• ### how to calculate power consumption in ball mill

TECHNICAL NOTES 8 GRINDING R P King Mineral Technologies,ball mill power calculation ,Figure 85 Effect of mill filling on power draft for ball mills The data,A simple equation for calculating net power draft is,Austin's formula gives slightly higher values than Morrell's for mills that have length equal Power Consumption

• ### Ball Mill Motor Power Draw Sizing and Design Formula

The following equation is used to determine the power that wet grinding overflow ball mills should draw. For mills larger than 3.3 meters (10 feet) diameter inside liners, the top size of the balls used affects the power drawn by the mill. This is called the ball size factor S. ﻿﻿ Rod and Ball Mills by C.A. Rowland and D.M. Kjos @ Allis-Chalmers

• ### CALCULATION OF THE POWER DRAW OF DRY

In this paper, a new approach for the calculation of the power draw of cement grinding ball mills is proposed. For this purpose, cement grinding circuit data including the operational and design parameters were collected from 14 industrial ball mills, ranging in diameters from 3.2 to 4.8 m. The ball loads within the mills were measured by different methods proposed in the literature and power

• ### ball mill power calculation cafeole-koeln.de

Ball Mill Power Calculation Pdfblackoutroom.pl. Ball mill size calculation. Calculation of the power draw of dry pdf datei calculation of the power draw of dry multicompartment ball mills 223 where gross power is the power input to the motor, noload power is the power 3 grinding media size formuladoering gmbh pdf datei ca Details; Calculation

• ### Ball Mill Design/Power Calculation LinkedIn

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

• ### MODELING THE SPECIFIC GRINDING ENERGY AND BALL-MILL

Ball mill power draw predicted from the Denver slide rule, kW 0 200 400 600 Calculated ball-mill power draw from the m odel derived, kW Data compared Line y=x Fig. 2. Comparison of the ball mill power draw from the Denver slide rule and the proposed model. Dashed line corresponds to y=x.

• ### TECHNICAL NOTES 8 GRINDING R. P. King Mineral Tech

approach to modeling of mill power draw. Trans. Instn. Mining. Metall. (Sect C:Mineral Processing Extr Metall.) 105, January-April 1996 ppC54-C62. Austin LG A mill power equation for SAG mills. Minerals and 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

• ### Best way to determine the ball-to-powder ratio in ball

The maximum power draw in ball mill is when ball bed is 35-40 % by volume in whole empty mill volume. Considering that ball bed has a porosity of 40 %, the actual ball volume is considered to be

• ### MODULE #5: FUNCTIONAL PERFOMANCE OF BALL MILLING

• Effective mill power draw • Ball mill specific grinding rate • Ball mill grinding efficiency The circuit output is defined as the production rate of fines by the circuit. It is calculated from three values: 1. The dry ore feed rate to the circuit (t/h). 2. The % fines in the circuit feed. 3. The % fines in the circuit product.

• ### A Method to Determine the Ball Filling, in Miduk Copper

A Method to Determine the Ball Filling, in Miduk Copper Concentrator SAG Mill specific power draw, and mill performance. Therein, load density and ball filling percentage in semi- autogenous mill and its effect on the mills power draw is of great value. There exist several ways to calculating ball filling such as drawing out whole internal mill load, taking photographs from load surface

• ### Application of Operating Work Indices in Autogenous

ball mill can be re-organised as [7] and [8], where B’Wio and A’Wio are the corrected operating work indices and WAG/SAG, WBM are the respective power draw of AG/SAG and ball mills. Note that the ball mill operating work index is applied only on the portion that needs the additional grinding (Q2), which renders to the AG/SAG mill the

• ### AMIT 135: Lesson 7 Ball Mills & Circuits Mining Mill

Wet Ball Mill Power Draw (Bond) (45.72 d↓max / 50.8) kWtThe F s factor is subtracted from the calculated power draw. The ball size factor, F B, is added to the mall shaft power for mill sizes greater than 3.3 meters:F↓B 1.102 (d↓max 12.5D / 50.8) kW/t; Other Rowland & Kjos Power Draw Corrections. F 1 : Dry grinding correction; F 2 : Correction for wet open circuit since

• ### AMIT 135: Lesson 6 Grinding Circuit Mining Mill

Larger than Ball mills at same power draw . Special Tumbling Mill Special tumbling mills [image: (135-6-14)] Conical Ball Mill. Wet or dry (air swept) Overflow or partial grate; Conical shell for “graded” ball charge and optimal size reduction; Only available in small and intermediate sizes; Efficient “high reduction ratio grinding” SSR Mill (Svedala Rubber Roller mill) Wet or dry

• ### CALCULATION OF BALL MILL GRINDING EFFICIENCY

08.03.2013· calculation of ball mill grinding efficiency. dear experts . please tell me how to calculate the grinding efficiency of a closed ckt & open ckt ball mill. in literatures it is written that the grinding efficiency of ball mill is very less [less than 10%]. please expalin in a n excel sheet to calcualte the same. thanks. sidhant. reply

• ### EFFECT OF BALL SIZE DISTRIBUTION ON MILLING PARAMETERS

EFFECT OF BALL SIZE DISTRIBUTION ON MILLING PARAMETERS François Mulenga Katubilwa A dissertation submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in fulfilment of the requirements for the degree of Master of Science in Engineering Johannesburg, 2008 . 1 I declare that this dissertation is my own unaided work. It is being submitted

• ### ball mill power calculation cannonb.ru

Ball Mill Parameter Selection Calculation Power. Aug 30 2019 · 1 Calculation of ball mill capacity The production capacity of the ball mill is determined by the amount of material required to be ground and it must have a certain margin when designing and selecting There are many factors affecting the production capacity of the ball mill in addition to the nature of the material grain size

• ### Nordberg ball mill model SAGMILLING.COM

This ball mill and rod mill power draw model is based on a torque model and empirical measurements made by the Nordberg Equipment Company for use by its sales representatives to size grinding mills. Slight differences in the equations used allow rod mills, dry ball mills and wet overflow and grate ball mills to be sized. Contents. 1 History; 2 Inputs; 3 Output; 4 Calculation description; 5

• ### Ball mill Wikipedia

A ball mill is a type of grinder used to grind, blend and sometimes for mixing of materials for use in mineral dressing processes, paints, pyrotechnics, ceramics and selective laser sintering.It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotati

• ### EFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL PERFORMANCE

EFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL PERFORMANCE Niyoshaka Nistlaba Stanley Lameck A dissertation submitted to the Faculty of Engineering and The Built Environment, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science in Engineering Johannesburg, October 2005 . i Declaration I declare that this dissertation