Transcribed image text: Question 3 [25 marks) A ball mill is operating at an efficiency of 80% with a filling volume of maximum 1.32 m! The ore has a W of 19 kW/on. The RD of the crushing balls are 5.0. The charge volume is about 45%. Calculate the following: a) What length and diameter of mill is required to reduce ore sizes from 4 mm to 200 um?

Ball mill presentation scribd.Ball mill presentation free download as pdf file.Pdf or read online for free nd out more.Calculation feed capacity mill dimensions filling ratio 30 45, mill dimensions bulk volume of the balls ball size d2 k dp where k.

calculations by the user. If the mill has cone ends the model automatically calculates the volume of the cone ends as well as the volume of balls/rock in the cone ends from the cylindrical section data that the user inputs. In SAG mills the total filling relates to the combined rock and ball volume (including voids),

Filling rate of grinding balls for this mill is 25-27 per cent of the total internal volume, i.e. approximately 13-15 tons of grinding balls. The calculation of the average diameter of the grinding ball in the mill showed that it is necessary to use 23.74mm steel grinding balls for maximum effective grinding.

how to calculate charge in ball mill Description : Calculations for mill motor power, mill speed and media charge L = Internal length of the mill in cms. after lining. how to calculate sag mill ball charge BINQ Mining. Jan 01, 2013 · TechnoMine Services, LLC. mill charge and speed.

How To Calculate Volume In Ballmill Filling A Method to Determine the Ball Filling in Miduk Copper of an industrial tubular ball mill some researches were done such as monitoring level of coal powder filling in an industrial ball mill as a function of mills power draw or investigation on the ball filling ratio under batch wet conditions due to ...

Generally, filling the mill by balls must not exceed 30–35% of its volume. Productivity of ball mills depends on drum diameter and the relation of drum diameter and length. Optimum ratio between length L and diameter D, L : D is, usually, accepted in the range 1.56–1.64.

Optimization of mill performance by using online ball and pulp …. mill absorbed power and ball filling degree. …Figure 4a and 4b—Definition of static and dynamic load angles Figure 5—PSD–mill discharge, primary mill »More detailed

Ball mill- what is the % of filling by balls and % of filling by materials ? ball mill size dia=2 meter, length 8 m, inner dia= 1.888 m, material to be grinded= illuminate, ball size= 20,30,40 mm ...

The degree of filling the mill with balls also influences productivity of the mill and milling efficiency. With excessive filling, the rising balls collide with falling ones. Generally, filling the mill by balls must not exceed 30–35% of its volume. Productivity of ball mills depends on drum diameter and the relation of drum diameter and length.

After that, the effect of ball filling on M 2 was investigated. As can be seen in Fig. 8, there is a linear relationship between mill capacity and ball filling since the amount of M 2 produced is the highest (95%) at J = 40% and the lowest (70%) at J = 24.5%. This confirms how throughput responds to increase in ball filling .

Quite often, there is a need for a quick and correct calculation of a grinding ball surface area and volume. Necessity of such calculations may arise when choosing a container for reloading grinding media into a ball mill;when selecting the optimum characteristics of grinding ballsto suit specific grinding requirements, etc. Most peoplecould say that this task refers to a …

The volume of a sphere (or ball) can be calculated using; V=4/3 r3 Multiply that by... Get Price Request for feedback for a Two Chamber Cement Mill Ball Charge and ... I am looking to get feedback for the following cement mill for a white cement plant. The …

How To Calculate Volume In Ball Mill Filling. Ball top size bond formula calculation of the top size grinding media balls or cylpebsmodification of the ball charge this calculator analyses the granulometry of the material inside the mill and proposes a modification of the ball charge in order to improve the mill efficiency.

Calculate Ball Mill Grinding Capacity. A) Total Apparent Volumetric Charge Filling – including balls and excess slurry on top of the ball charge, plus the interstitial voids in between the balls – expressed as a percentage of the net internal mill volume (inside liners).

to ball filling variation in the mill. The results obtained from this work show, the ball filling percentage variation is between 1.2– 3.7% which is lower than mill ball filling percentage, according to the designed conditions (15%). In addition, acquired load samplings result for mill ball filling was 1.3%.

There is a mathematical solution to this problem – the Bond formula. It uses to help determine the grinding media optimal size must be loaded into the ball mill for proper operation ensure. The calculation formula is below: B – the grinding balls diameter, mm; A – the correction factor (for grinding balls A = 20,17; for cilpence A = 18,15);

Ball mill liners may be made of hard cast iron when balls of up to 5 ... and then poured into the syringe, typically filling 1 10-1 8 th of its volume. Then the top of the injector is connected to a vacuum pump, capable of generating a pressure of 0.1 atm approximately, 'to boil off' trapped air in the viscous mixture (of the consistency of ...

Calculation Of Charge In Ball Mill. how To calculate for ball mill media charge. ball mill charge calculation. ball filling degree mill calculation scribd averages pounds per cubic foot a ball mill charge is a heavy compact body of ore to be crushed intermixed with the grinding media forming the mill load, all rotating in a path, get quote mill gr. more details. calculation of ball mill …

We can calculate the steel charge volume of a ball or rod mill and express it as the % of the volume within the liners that is filled with grinding media. While the mill is stopped, the charge volume can be gotten by measuring the diameter inside the liners and the distance from the top of the charge to the top of the mill.

A Slice Mill of 72" diameter by 12" wide would replicate the result of a normal production, mill 72" in diameter as 120" long. A Slice Mill is the same diameter as the production mill but shorter in length. Click to request a ball mill quote online or call 630-350-3012 to speak with an expert at Paul O. Abbe® to help you determine ...

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, hardness, density, temperature and …

For overflow ball mills, the charge should not exceed 45% of the mill volume . For grate discharge mills, the charge should occupy about 50% of the mill volume . Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, i.e.,

Iron Ore Ball Mill Grinding Media Filling Ratio Calculation. Calculation Of Ball Mill Charge Volume. Free calculation for ball mill charge volumeill steel charge volume calculatione can calculate the steel charge volume of a ball or rod mill and express it as the of the volume within the liners that is filled with grinding media.

Ball Mill Percentage Filling Calculations. Mining Ball Mill Force Calculations. Mining Ball Mill Force Calculations. Ball mill.Ball mill machine is widely applied in the industries such as cement silicate product refractory fertilier mineral processing of ferrous and nonferrous metal and glass ceramic etc.It is mainly used to make dry or wet powder grinding of various ores and …

Report on Ball mill. ... all cases, some manufacturers for the ball mill, and estimation of the cost the ball mill. ... ^2 The bulk volume of balls charge ratio to the volume of mill is known as {Filling ratio} and its range is {30-45%} ^2...

Equation 1 is multiplied by the factor of 1.08. A multi-compartment ball mill consists of two or more grate discharge ball mills in series. The same equation is used to calculate the power that each ball mill compartment should draw. The total power is the sum of the power calculated for each of the separate compartments.

The charge volume of a ball or rod mill is expressed as the percentage of the volume within the liners filled with balls or rods. When the mill is stationary, the charge volume can be quickly obtained by measuring the diameter inside the liners and the distance from the top of the mill inside the liners to the top of the charge.

Volume 34, Issue 3, March 1992, Pages ... is the specific rate of breakage of material in size interval i in a mill of internal diameter D with a fractional filling of the mill by balls of J (assuming a porosity of the ball bed of 0.4), with balls of diameter d, and an interstitial filling of the balls by particles of U, with the mill operated ...