ball mill power draw 2 pi
Mill drives: the desire for increased power and the ...
For example, the D:L ratio for 32 ft dia. mills decreased from 3.00:1 to 2.17:1 over 35 years until the advent of 36 ft dia. mills in 1973. The D:L ratio for 36 ft dia. mills decreased from 2.53:1 to 2.06:1 over 23 years until the first 38 ft dia. mill was purchased in 1996. The 38 ft dia. mills are 1.87:1, with special cases at Freeport (2.08:1)
wet ball mill grinder technical specification drawing
Ball Mill Design/Power Calculation - Mineral Processing / Metallurgy - Know More 17 Mar 2017, The basic parameters used in ball mill design (power calculations), rod mill or any, be correct for the specified size reduction when grinding wet in closed circuit, Now we much select a Ball Mill that will draw this power...
Power-draw prediction by random forest based on operating ...
1. Introduction. In mineral processing plants, comminution circuits are the most energy consuming units; thus, determination of mill power-draw can be one of the most important factors for designing, operating and evaluating of an efficient plant,, .It was reported that for a ball mill with 5 m diameter and 7 m length, the power draw can be between 2.5 and …
Optimization of mill performance by using
Mill power Usually, plant operators use mill power readings as an indicator of ball filling degree and, often, try to keep it at the maximum level. It is well known that the mill absorbed power depends on operating parameters other than ball level, such as pulp density and liner configuration. Figure 2 shows that there is no linear relation between
CA2514859C - Method for defining the degree of fullness in ...
The invention relates to a method for defining the degree of fullness in a mill and the load toe angle (~k), where there are used oscillations directed to the mill electric motor, in order to define the toe of the mill load composed of the mass to be ground. According to the invention, from the obtained measurements (P(n)) related to the mill draw or torque, there is defined the phase …
power calculation formula for ball mill - Traxo
power calculation formula for ball mill. Calculation of energy required for grinding in a ball mill. The grinding-product size P in a Bond ball mill which is given by the aperture size which passes 80 of the grinding product as a function of the aperture size of the test screen P k can be expressed by the formula P= P k K 2.
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.
EFFECTS OF GRINDING MEDIA SHAPES ON BALL …
Figure 5.11 Power variation with mill speed for different media shapes (J=15%).86 Figure 5.12 Power variation with mill speed for different media shapes (J=20%).87 Figure 5.13 Power variation with mill speed for different media shapes (J=25%).87 Figure 5.14 Variation of mill power draw with mill filling, J (cylpebs media)…..88
The Effect of Ball Size Diameter on Milling Performance
and therefore we observe an increase in the power draw and as the load was dropped onto the mill toe, energy was released and the power and -2 mm +1.4 mm for experiments. A mill run having a mixture of the 3 ball diameter sizes was also conducted. The ball filling level was kept constant at 40% by volume for all ball diameters as was done by ...
GROSS POWER CALCULATOR - SMC Testing
predicted. Slurry pooling causes the power draw in AG and SAG mills to be lower than a mill without a slurry pool. This phenomenon results in overflow mills usually drawing less power than grate discharge mills that are operating without a slurry pool. This is because by definition overflow mills operate all of the time with a slurry pool.
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.
Dynamic Modelling of Temperature in a Wet Ball Mill Based ...
For a well-mixed mill, the size of particles inside the mill would be equal to the mill product size (l i = y pi) ... Analysis of power draw in ball mills by discrete element method, Canadian Metallurgical Quarterly, 38: 133-140. [5] Da Silva, W. P., Gama, F. J. …
Effect of the operating parameter and grinding media on ...
The wear of lifter in ball mill directly affects the grinding efficiency and economic cost. However, how to evaluate the variation of wear process and predict the wear distribution of lifter is poorly developed. ... Predicting charge motion, power draw, segregation and wear in ball mills using discrete element methods. Miner Eng 1998; 11: ...
PowerPoint Presentation
10.2 17.5 4,090 32.60 1.05 31.05 ORE CRC SAG mill power installed SAG specific energy Ball mill power draw Ball mill power installed Ball mill specific energy Total specific ener Desi gn through put Design through put Desi gn factor Nomi nal throughput ANGLOGOLD ASHANTI
calculation of power for ball mills and grinding
Ball Mill Motor Power Draw Sizing and Design Formula. 05/04/2018 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.
Development of operation strategies for variable speed ...
Development of operation strategies for variable speed ball mills. Creator. Liu, Sijia. Publisher. University of British Columbia. Date Issued. 2018. Description. Mineral processing productivity relates to a range of operating parameters, including production rate, product grind size, and energy efficiency.
Studies Show Snags to Mill Optimization | E & MJ
At Eagle, the ball milling circuit starts with a crushing plant and ends with a 12.7-mm screen. "The ball mill is 3.20 m diameter and 4.88 m long," the study said. The discharge typically contains "negligible +12.7-mm material." At the time, "tonnage was 45 metric tons per hour (mt/h), and mill power draw was 709 kW," the study said.
Energy-Mass-Size balance model for dynamic control of a ...
A dynamic model is developed for a wet overflow ball mill based on a set of mass and energy balances to simulate the mill. The energy balance relies on temperature and mass flow data. The key control parameters to be measured are mill temperature (feed and discharge streams), mill power draw and the mass flow rate in the feed stream.
Services - CMD Consulting
Mill power draw modelling; Effect of mill speed, mill filling, ball charge and slurry density. Fully autogenous (AG) versus Semi-Autogenous (SAG) milling. Morrell power model versus other published models; Session 6. Circuit Modelling and Engineering Trade Off Studies; Using Comminution Data in JKSimMet. Demonstrate Power Draw Analysis in ...
Ball Mill Power Load Relationship
Apr 08 2018 A motor with around 1400 Horse Power is calculated needed for the designed task. Now we much select a Ball Mill that will draw this power. 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.
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 from known tables 'the old fashion way'.
ball mill air separator efficiency formula
ball mill power draw pi. Further studies of ball and powder filling effects in ball. The specific rates of breakage of quartz have been studied in three tumbling ball mills,, the power draw by the mills with, i11in0 ronqC pI 1 1 1 1 1. Get Price. ball mill air separator efficiency formula.
Vertimill® - Outotec
Vertimill® is a unique product offered exclusively by Outotec. Grinding efficiency, reduced media consumption, lower installation cost, minimal maintenance, and minimal liner wear make Vertimill® the lowest total cost of ownership in many applications, substantially improving the profitability of concentrators.
Application of Operating Work Indices in Autogenous ...
Ball Mill Wio, BWio 8.6 Circuit Wio, OWio 14.6 Bond Ball Mill Work Index, BWi, kWh/t 13.4 Bond Rod Mill Work Index, RWi, kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on ...
DEM modeling of ball mills with experimental validation ...
Discrete element method simulations of a 1:5-scale laboratory ball mill are presented in this paper to study the influence of the contact parameters on the charge motion and the power draw. The position density limit is introduced as an efficient mathematical tool to describe and to compare the macroscopic charge motion in different scenarios, i.a. with …
DEM modeling of ball mills with experimental validation ...
12%Discrete element method simulations of a 1:5-scale laboratory ball mill are presented in this paper to study the influence of the contact parameters on the charge motion and the power draw. The position density limit is introduced as an efficient mathematical tool to describe and to compare the macroscopic charge motion in different …
The Power of Model Based Control for Mineral Processing ...
The equation for mill power draft is: (5 ) where P is the mill power draw, is a C2 proportionality constant, Wc is the weight of the charge, V* is the fractional filling of the mill by ore and balls, N* is the fractional mill speed and is the dynamic angle of repose for the charge. a varies with mill speed and other factors so it is estimated ...
CALCULATION OF THE POWER DRAW OF DRY …
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 draw of each mill were calculated. The results showed that power draw of the cement mills could accurately be predicted by the method proposed in ...
Ball Mill Design/Power Calculation
If P is less than 80% passing 70 microns, power consumption will be. 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 ...