calculation example ball mill draw power

ball mill capacity how to calculate

Ball Mill Capacity Calculation Pochiraju Industries Ltd Ball mill capacity, how to calculate Coal Surface Mining western posts related to 10 tonne per . Get Price. Towards optimising ballmilling capacity Effect of lifter design. The

Bond Tests | SGS

Bond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements when sizing ball mills*. Various correction factors may have to be applied. The test is a closed-circuit dry grindability test performed in a standard rod mill.

Calculated Power For Grafe-Discharge And Overflow Ball Mills

ball mill speed calculation filetype: pdf – Grinding Mill China. A more fine-tuned calculation for the Ball Mills power … wet overflow ball mill is 5.02. 4. … how to calculate the critical rpm of ball mill when critical radius is …

calculation example ball mill draw power – Grinding Mill China

On calculation example ball mill draw power, there are a lot of calculations and considerations way is costing methods in ... » Learn More ball mill grinding calculation - YouTube ball mill grinding calculation, Links: ... is quite ...

Energy Use of Fine Grinding in Mineral Processing - Home

2013/12/18 · For example, the figure suggests that a mill operating with an F80 of 100 μm should use 3-mm media, while a mill grinding to below 10 μm would need to use 1-mm media. To reduce a feed of 90 μ m F80 to 10 μ m P80, Figure 9 suggests that comminution be done in two stages (two Isamills or SMDs in series) for optimal efficiency.


Demonstration/Example Calculations “Black Box” (Generic) Circuit Calculation : Circuit dry tonnage = 450 t/h . Power draw Standard of mill(s) (@ pinion(s)) = 3,150 kW . Circuit Feed F80 =2,500 µm . Circuit Product P80 = 212 µm . Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test

Ball Mill Parameter Selection & Calculation - Power, Critical

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.

Optimizing your SAG mill operation - International Mining

2007/03/21 · Elimination of the above mentioned material transport problems will allow the mill to respond truly in terms of power draw for changes in mill load which depends on feed ore characteristics. Although curved pulp lifters partially solve the ‘carry-over’ …

Ball Mill Design/Power Calculation

2018/04/08 · 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 …

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator

The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill.

PDF Power-based comminution calculations using Ausgrind

The SAG and ball mills power draw is calculated using semi-empirical equations, as a function of mill geometry, speed and load. • The SAG Power Index (SPI) test was developed by Starkey and ...

power calculation for ball mill

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 ...

Effects of slurry filling and mill speed on the net power

Feb 01, 2014 · The theoretical power draw model of a mill or Morrell’s power model is an elegant solution to mill power modelling. It has the merit of treating autogenous, semi-autogenous, and ball mills as one single class of devices for which the power draw could be predicted with the same equations.


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 “single-stage 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 ...


2013/03/08 · re CALCULATION OF BALL MILL GRINDING EFFICIENCY I never hear about grinding efficiency and it will depend on % of load, velocity across the mill, blain, Separator efficiency , recirulation load , specific power consumtpion by

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 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.

GrindingExpert™ - Automation Technology

Example SAG Mill Strategy !!! A negative set point change will be applied if any of the following conditions are true:!! • Mill power is high! •Mill sound is very high! •Recycle tonnage is high ! •Screen amps are high! •Mill feed is at its maximum, and bearing pressure remains low! • Mill feed is at its maximum and mill !sound is high!

calculation transmission power of wet ball mill tube mills

Calculation Of Ne Ball Mill Power Ball Mill Design/Power Calculation LinkedIn. Dec 12, 2016Ball 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

Power-based comminution calculations using Ausgrind

The SAG and ball mills power draw is calculated using semi-empirical equations, as a function of mill geometry, speed and load. • The SAG Power Index (SPI) test was developed by Starkey and ...

Best way to determine the ball-to-powder ratio in ball-milling?

2020/11/25 · 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 ...

A Method to Determine the Ball Filling, in Miduk Copper

ball mill as a function of mill`s power draw or investigation on the ball filling ratio under batch wet conditions, due to load density alters [2, 3]. In addition it is to be noted that too large or too small mills load filling could conduct ???? H ...

power calculation formula for ball mill

of the Bond ball mill grindability test. For all model based methods, a reliable method to calculate mill power draw for a given mill is required for the calculation of power draw. Morrell (1996) proposed a mathematical model for autogenous, semi-autogenous and ball mills which is based on the motion of grinding charge inside the mill.get price

Math cement module_1 - SlideShare

Jan 08, 2012 · Calculation of mill power demand for desired output at specified feed andMC_V1_B204_RawMill_10_r4 product sizes, based on Bond Index.MC_V1_B204_RawMill_10_1BI Calculation of mill output for differentU feed and product sizes Calculation of mill output for differentMC_V1_B204_RawMill_10_1 feed and product sizes Calculation of Efficiency of ...

Bond formula for the grinding balls size calculation

2017/10/25 · In our example, the grinding balls diameter needed to load into the mill must be equal to 40-50 mm. Let’s sum up. The grinding balls diameter determined by the Bond formula has a recommendatory character and serves as a starting point for calculating the necessary proportion grinding media feeding a new mill.

A Method of C alculating Autogenous/ Semi-Autogenous Grinding

mills with the rod mill and ball mill laboratory work indices. Note, in Figure. 1, that the rod mill product slope is less than 0.5 due to an extra amount of nes present being fi fi ner than 650 μm. These fi nes proceed to the ball mill improving the ball mill effi ciency. Also, the plotted rod mill P80 value, as shown in Figure 1, is 2900 ...

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