# sag mill specific energy calculation formula

...### AG Autogenous & SAG Semi-Autogenous Mill Design Calculations

Apr 17, 2018· Obviously, the SAG mill is consuming more and the ball mill less power than was predicted by the empirical method, but the overall total is 99.5% of the predicted total. Examples. The Hemlo gold project of Teck-Corona (1000 mtpd) provides an example of mill sizing using the empirical calculation

Ask for price### SPECIFIC COMMINUTION ENERGY SMC Testing

the specific energy of the crushing section, the HPGR section and the tumbling mill section separately. Hence, for example, in the case of an SABC circuit the total specific energy of the entire comminution circuit will be predicted plus the individual specific energies of the primary crusher, pebble crusher and combined SAG/Ball mill stages.

Ask for price### Modelling SAG milling power and specific energy

Especiﬁc energy modelling SAG mills operation data abstract Comminution, particularly milling, is on average the largest consumer of energy in mining. Actual com-minution circuits consist in most of the cases in coarse crushing, SAG milling, pebble crushing and sec-ondary ball milling. In these circuits the SAG mill is the largest energy

Ask for price### O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

All of the said methods aim to find specific energy for the required SAG comminution of test ore material. Specific energy consumption (SEC) measured in kWh/t is a ratio of the mill drive power to the milling circuit output, without regard to circulating load. At the constant size of the cycle feed and discharge, SEC is a prime characteristic of

Ask for price### MILL OPERATORS CONFERENCE 2012 TALK 011-012-07

bond specific energy values follow a power law described by a regression formula these factors, calculated from this formula,when applied to the bond specific energy values, will result in the ag/sag specific energy to achieve the required ag/sag t80 value. (this does not include pebble crushing power) corrections for s.g. and ab variations

Ask for price### Modelling SAG milling power and specific energy

Jan 01, 2015· In his approach the total specific energy of the entire AG/SAG circuit is firstly predicted using the SAG mill feed F80 and the ball mill cyclone overflow P80. Morrell’s model ( Morrell, 2011 ) relates the feed, mill geometry and operating conditions to the specific energy of the circuit.

Ask for price### AN UPDATED DATA SET FOR SAG MILL POWER MODEL

The Morrell C-Model is a generalised tumbling mill model and is not specific to SAG mills. The model was adopted for use in the JK SimMet™ software package and this paper is based on the description in a JK Mineral Research Centre publication (Napier-Munn et al, 1996). The model contains too many equations and sub-equations to replicate here.

Ask for price### USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT

parameter ta and crusher model energy matrices, the SMC Test ® can be used to conduct AG/SAG mill and crusher circuit simulations through the use of JKSimMet. Independent of this it can be used in power-based calculations, which in conjunction with the Bond ball work index test, enable the prediction of the specific energy of comminution circuits

Ask for price### Modelling SAG milling power and specific energy

Jan 01, 2015· In his approach the total specific energy of the entire AG/SAG circuit is firstly predicted using the SAG mill feed F80 and the ball mill cyclone overflow P80. Morrell’s model ( Morrell, 2011 ) relates the feed, mill geometry and operating conditions to the specific energy of the circuit.

Ask for price### A New Approach to the Calculation of Work Index and the

calculated by the formula provided by Stamboltzis [7]. PMN 9.9 (6) where . M (kg) is the mass of balls (6.5 kg) plus the feed (0.5 kg), N (Hertz) is the rotating frequency and . D (m) the mill diameter . For the batch tests the mill is loaded and rotates for a time . t (sec) consuming energy (Joules). This energy corresponds to a specific energy

Ask for price### Specific Energy Consumption Calculation

Specific Energy Consumption Calculation S. No Newsprint Units Base Line Year (BY) Assessment Year (AY) 1 Specific Steam Consumption -MP kcal/Tonne 0 0 2 Specific Steam Consumption -LP kcal/Tonne 1921850 1995000 3 Specific Power Consumption kcal/Tonne 1423329.57 1028949.235 4 Total Specific Energy Consumption (Newsprint) kcal/Tonne 3345179.57

Ask for price### AMIT 135: Lesson 6 Grinding Circuit Mining Mill Operator

SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill

Ask for price### Difference Between Sag Mill vs Ball Mill mech4study

Oct 12, 2017· In ancient time, the mills were operated with muscle power (by hands), water animals and wind. They were totally based on the mechanical energy by natural resources and living beings.There are many types of mills which are used in the grinding industries. Today we will discuss about two important mill, sag mill and ball mill.

Ask for price### TECHNICAL NOTES 8 GRINDING R. P. King

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 Net power KD2.5L e! 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

Ask for price### COMPARISON OF HPGR BALL MILL AND HPGR STIRRED

comparison of hpgr ball mill and hpgr stirred mill circuits to the existing ag/sag mill ball mill circuits by chengtie wang b.eng., university of science and technology beijing, 2009 a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science in

Ask for price### Work Index Determination for High Pressure Grinding Rolls

model the performance of SAG / Ball mill circuits. This paper describes the development . of the equipment and a small scale static test that measures specific energy for compression breakage through the calculation of mechanical energy consumed and breakage achieved. We refer to this test as the Static Pressure Test, or SPT.

Ask for price### SAGMILLING.COM .:. Home

Sagmilling is home to a collection of both free and subscription-based calculation tools to aid metallurgical process engineers perform comminution calculations. Grinding circuit design tools, including for SAG mill-ball mill circuits, and geometallurgy energy models are available to subscribers.

Ask for price### Sag and Tension Calculations Refinements and

Sag-Tension Calculations: Refinements and Enhancements Made by Trimble Energy Solutions by: Jacques Hamian and Yair Berenstein Abstract Sag-tension programs have traditionally calculated the conductor’s sag-tension characteristics using the ALCOA graphic method. By refining the input used in this equation, and augmenting

Ask for price### TECHNICAL NOTES 8 GRINDING R. P. King

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 Net power KD2.5L e! 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

Ask for price### UTransmission Line Loading

1. Sag Calculation 2 a. Thermal Elongation 5 b. Stress-Strain Behavior 5 c. Sag at High Temperature 6 d. Sag with Ice Loading 7 e. Behavior of Layered Cables 8 2. Ampacity of a Conductor 10 a. Heat Balance Equation 11 b. Radiant Heat Loss 11 c. Convective Heat Loss 11 d. Solar Radiation 12 e. AC Losses 12 f. Ampacity of the Conductor 12 3.

Ask for price### COMPARISON OF HPGR BALL MILL AND HPGR STIRRED

comparison of hpgr ball mill and hpgr stirred mill circuits to the existing ag/sag mill ball mill circuits by chengtie wang b.eng., university of science and technology beijing, 2009 a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science in

Ask for price### Specific Energy Consumption Calculation

Specific Energy Consumption Calculation S. No Newsprint Units Base Line Year (BY) Assessment Year (AY) 1 Specific Steam Consumption -MP kcal/Tonne 0 0 2 Specific Steam Consumption -LP kcal/Tonne 1921850 1995000 3 Specific Power Consumption kcal/Tonne 1423329.57 1028949.235 4 Total Specific Energy Consumption (Newsprint) kcal/Tonne 3345179.57

Ask for price### Energy efficiency IsaMill™ Advantages Isamill

The use of tower mills as an energy efficient alternative to secondary and regrind ball milling became a common inclusion in the latter part of the previous century. Traditionally the higher energy efficiency was attributed to the difference between attrition grinding in tower mills and impact grinding in ball milling.

Ask for price### Energy Use of Fine Grinding in Mineral Processing

Dec 18, 2013· Fine grinding, to P80 sizes as low as 7 μm, is becoming increasingly important as mines treat ores with smaller liberation sizes. This grinding is typically done using stirred mills such as the Isamill or Stirred Media Detritor. While fine grinding consumes less energy than primary grinding, it can still account for a substantial part of a mill’s energy budget.

Ask for price### Energies Free Full-Text Specific Energy Consumption

Examples of SEC usage as indicators for these calculations are: (i) SEC at sub-sector level, which relates energy use to physical production (e.g., GWh/kt paper, MJ/tonne of steel, etc.) for a given period, usually a year; and (ii) SEC for energy using systems, which relates total energy use for specific systems to the number or size of systems.

Ask for price### Work Index Determination for High Pressure Grinding Rolls

model the performance of SAG / Ball mill circuits. This paper describes the development . of the equipment and a small scale static test that measures specific energy for compression breakage through the calculation of mechanical energy consumed and breakage achieved. We refer to this test as the Static Pressure Test, or SPT.

Ask for price### AMIT 135: Lesson 7 Ball Mills & Circuits Mining Mill

It is generally accepted that practical mill power (PM ) is a function of mill capacity and diameter, i.e.,P M = Mill Constant * (Mill Diameter ) n where n = 0.3 to 0.5. It is evident that mill power is a function of the height at which the media is lifted and the density of the media, i.e., PM = K Ï b LD 2.5 where k is a proportionality constant.

Ask for price### How To Calculate Power Output Of Wind Windpower Engineering

Jan 26, 2010· Calculate the energy of wind per unit mass if the power available at the rotor of a wind turbine is 699 kW, diameter of the rotor, D = 88 m, Air density, ρ = 1.23 kg/m3 and Power Coefficient, Cp = 0.40. Your calculation is wrong, formula is 0.01328* D^2*V^3. You should have 4 feet squared, and 28mph to the cube: 0.01328*4^2*28^3=4660 KWh

Ask for price### hydroelectricity power and energy calculator free online

Formula to calculate hydropower. How to calculate output power of a hydroelectric turbine? The simplest formula is : Where P = Mechnical power in kW Q = flow rate in the pipe (m3/s) ρ = density (kg/m3) g = Acceleration of gravity (m/s²) H = waterfall height (m) η = global efficiency ratio (usually between 0,7 and 0,9) Calculator

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