# Power Consumption In Sag Mill

## Modelling SAG milling power and specific energy

In these circuits the SAG mill is the largest energy consumer In many engineering projects either a power equation and/or a specific energy equation are used for the designing of these mills but not always with acceptable results In general these equations are used to predict power consumption as a function of mill size level and density of the internal charge and % of critical speed

## Energy Efficiency Of Sag Mill

Modelling SAG milling power and specific energy In these circuits the SAG mill is the largest energy consumer In many engineering projects either a power equation and/or a specific energy equation are used for the designing of these mills but not always with acceptable results In general these equations are used to predict power consumption as a function of mill size level and density of

## Operating work index is not the specific energy consumption

· Specific Energy Consumption is the power draw of a mill kW usually corrected to the pinion or mill shell This will usually be feed belt sample in the case of a SAG mill

## Modelling SAG milling power and specific energy

In these circuits the SAG mill is the largest energy consumer In many engineering projects either a power equation and/or a specific energy equation are used for the designing of these mills but not always with acceptable results In general these equations are used to predict power consumption as a function of mill size level and density of the internal charge and % of critical speed

## Modelling SAG milling power and specific energy

In these circuits the SAG mill is the largest energy consumer In many engineering projects either a power equation and/or a specific energy equation are used for the designing of these mills but not always with acceptable results In general these equations are used to predict power consumption as a function of mill size level and density of the internal charge and % of critical speed

## Mill power draw models

Mill Power Draw Models The mill power draw models are used to predict how much power will be consumed by a particular type of mill mill geometry and set of mill operating conditions This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models Models of this type do not predict the particle size distribution of a milled

## Application of Operating Work Indices in Autogenous

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 credit for the fraction of the material that had been already ground to final product Q1 To calculate the operating work indices equations [5] and [6] must be solved The equations contain three

## Energy Consumed By A Ball Mill Depends On

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

## Operating work index is not the specific energy consumption

· Specific Energy Consumption is the power draw of a mill kW usually corrected to the pinion or mill shell This will usually be feed belt sample in the case of a SAG mill

## Mill grinding Wikipedia

SAG mills are autogenous mills that also use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21% The largest SAG mill is 42 in diameter powered by a 28 MW 38 000 HP motor A SAG mill with a 44 diameter and a power of 35 MW 47 000 HP has been

## Cutting Power for Face Milling MITSUBISHI MATERIALS

What is the cutting power required for milling tool steel at a cutting speed of 80m/min With depth of cut 2mm cutting width 80mm and table feed 280mm/min by Φ250 cutter with 12 inserts Machine coefficient 80% （Answer） First calculate the spindle speed in order to obtain feed per tooth n=1000vc÷πDC= 1000×80 ÷ ×250 = 1 Feed per Tooth fz=vf÷ z×n =280÷ 12× =0

## 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 mill absorbed power and ball filling degree

## Mill power draw models

Mill Power Draw Models The mill power draw models are used to predict how much power will be consumed by a particular type of mill mill geometry and set of mill operating conditions This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models Models of this type do not predict the particle size distribution of a milled

## Modelling and optimization of energy consumption for

· Energy consumption is increasing along with the world s population and industrialization level thus energy and resource efficiency in manufacturing is of vital importance In order to increase energy and resource efficiency the amount of consumed energy must first be accurately quantified for each manufacturing process Milling is one of the most common machining operations

## STEEL PLANT PERFORMANCE POWER SUPPLY SYSTEM DESIGN

the reactive power consumption in the rolling mills and the auxiliary systems Therefore a fixed capacitor bank was added to the rolling mill s bus Step down transformers with high impedance were used as well as smoothing reactors on the DC furnace high current side as additional means together with the SVC The purpose was to prevent as far as possible the disturbance from being fed

## power consumption in sag grinding

Total grinding power consumption decreases and SAG mill capacity increases significantly Later tests with other types of ore have shown lesser differences between those size distributions However the effects on power consumption and mill capacity have been the same confirming the strong effect of small variations in the ultrafines production

## Modelling and optimization of energy consumption for

· Energy consumption is increasing along with the world s population and industrialization level thus energy and resource efficiency in manufacturing is of vital importance In order to increase energy and resource efficiency the amount of consumed energy must first be accurately quantified for each manufacturing process Milling is one of the most common machining operations

## Mill power draw models

Mill Power Draw Models The mill power draw models are used to predict how much power will be consumed by a particular type of mill mill geometry and set of mill operating conditions This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models Models of this type do not predict the particle size distribution of a milled

## Application of Operating Work Indices in Autogenous

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 credit for the fraction of the material that had been already ground to final product Q1 To calculate the operating work indices equations [5] and [6] must be solved The equations contain three

## Modelling SAG milling power and specific energy

Abstract Comminution particularly milling is on average the largest consumer of energy in mining Actual comminution circuits consist in most of the cases in coarse crushing SAG milling pebble crushing and secondary ball milling In these circuits the SAG mill is the largest energy consumer In many engineering projects either a power equation and/or a specific energy equation are used for

## Energy Use of Fine Grinding in Mineral Processing

· compared to the power used by a semi autogenous mill and a ball mill in a primary grinding circuit a ball mill can have an installed power of up to 15 MW while installed power for a SAG mill can go up to 25 MW However the energy used for ﬁne grinding is still signiﬁcant Moreover as this paper seeks to demon

## TECHNICAL NOTES 8 GRINDING R P King

Mills usually operate in the range 65 82% of critical but values as high as 90% are sometimes used A crucial parameter that defines the performance of a mill is the energy consumption The power supplied to the mill is used primarily to lift the load medium and charge Additional power is required to keep the mill rotating Power

## Energy Use of Fine Grinding in Mineral Processing

· compared to the power used by a semi autogenous mill and a ball mill in a primary grinding circuit a ball mill can have an installed power of up to 15 MW while installed power for a SAG mill can go up to 25 MW However the energy used for ﬁne grinding is still signiﬁcant Moreover as this paper seeks to demon