# sag and ag mills energy

### Comminution Wikipedia

The comminution energy can be estimated by: Rittinger''s law, (AG) or semiautogenous (SAG) mills depending on feed properties and appliion requirements. For comminution of finer particle size ranges (20mm > P 80 > 30 μm) machines like the ball mill, vertical roller mill, hammer mill, roller press or high compression roller mill,

Get price### Electrodrives ElectroDrives SL Ser. Drive Specialist

We are experts in Slip Energy Recovery Drives (SER Drives), Liquid Resistor Starters (LRS), Static Excitation Systems and Harmonics filters. Find out the solutions we provide our customers for their SAG mills, AG mills and ball mills commonly used in the mining sector.

Get price### Model Predictive Control for SAG Milling in Minerals

Model Predictive Control for SAG Milling in Minerals Processing Steven J. McGarel, Rockwell Automation Introduction SAG and ball mills are generally accepted as the largest power consumers in a mining and mineral processing operation and can be 80% of total electrical energy consumed at a specific power consumption of around 20kWh/ton.

Get price### Orway Mineral Consultants Canada Ltd. Mississauga, ON

The SAG Power Index (SPI) test (Starkey & Dobby, 1996) uses a benchscale SAG mill test to determine the specific energy of an industrial SAG mill. The test is operated in closed circuit and the time required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG specific energy

Get price### a Magnetite Ore in Eastern Hebei, China Semantic Scholar

conditions [9]. The speciﬁc energy of tumbling mills such as autogenous (AG), semiautogenous (SAG), and ball mills have been successfully predicted by the Morrell model [12–15]. In addition, the high pressure grinding rolls (HPGR) has also been developed recently due to its high energy efﬁciency in

Get price### SmartMill Grinding ABB

Combine ABB''s variablespeed drive system with advanced process control ABB Ability™ Expert Optimizer for grinding to provide maximum mill control. It can be applied to new or existing AG, SAG and ball mills, powered by either ringgeared mill drives (RMD) or gearless mill drives (GMD).

Get price### SAGDesign Test Starkey and Associates Inc.

The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S dBWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P 80.This information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial appliions.

Get price### Outotec Grinding Mills Outotec

We offer autogenous (AG), semiautogenous (SAG), ball, rod, and pebble mills in sizes ranging from kWs up to 30+ MW. Our product range also includes a number of unique solutions, including the world''s largest acidresistant grinding mills, which can operate with extremely corrosive slurry.

Get price### A Method of C alculating Autogenous/ SemiAutogenous

of the energy required by a SAG mill. Put another way, the SAG mill energy required according to this statement, is 2.5 times more than the Ab value to produce the same degree of particle breakage. There is a speci ﬁ c gravity factor that affects AG/SAG power draw. The lighter material, in

Get price### SPIE SAG Group Partner for energy infrastructures

In only eleven month the SAG implemented a 12 kilometer extrahigh voltage line, 47 steel masts and the reconstruction of a 400kV substation – and at the same time secured the energy

Get price### laboratory sag mill

The JK Drop Weight Test was developed in the laboratory at the JKMRC as a means of determining the breakage characteristics of a sample of ore in an AG/SAG mill. In an AG/SAG mill, there are two main mechanisms of breakage: impact (high energy) and abrasion (low energy). Get price

Get price### Autogenous AG & SAG Mills for Sale

This procedure maximizes ore throughput and minimizes electrical energy consumption. Assuming your ore is AGamenable: 7 TPH to 15 TPH is a comfortably production average for a 13'' x 4.5'' AG Mill. A 13'' x 6'' SAG Mill has a reasonable range of: 20 to 30 TPH for gold ore SAG & Ball Mill duty 25 to 40 t/h for copper porphyry SAG & Ball Mill duty

Get price### Ball Mill Critical Speed & Working Principle YouTube

Jun 19, 2015 · If 75 percent of critical speed is considered desirable for efficient grinding in a 2.4 meter (8 foot) diameter mill, then the same will be true for a 5.0 meter (15½ foot) diameter mill.

Get price### AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator

SAG Mill Circuit Example – Gold Processing SAG mill circuit example for gold processing [image: (13563)] AG/SAG Mill. AG/SAG mills are normally used to grind runoffmine 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

Get price### mill power sag mills

stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method. Rod mill and AG/SAG mill products are similar and tend to be not as steep as a slope when plotted on loglog paper. This is because the particle size distribution (PSD), these mills €????

Get price### Why Use A Sag Mill

INCREASING SAG MILL CAPACITY AT THE COPPER 20'' EGL SAG mill, a Raptor 900 pebble crusher and two 24'' x 39''6" ball mills. Each mill is equipped with a 2 x 8500HP dual pinion drive system. The plant was designed to process 1585 h mtpof SAG feed. From startup, the mill struggled to meet the required production rates.

Get price### Digital Control Lab

Digital Control Lab is a company that designs systems to improve the efficiency of cement and mining plants. Contact us today.

Get price### Energy efficient Comminution circuits

Energy efficient comminution circuits can offer significant energy savings. AG mill is followed by a single deck to the AG mill. The undersize from the screen is fed to cyclones with the underflow fed to pebble mill circuit sump. AG mill can be replaceable for a SAG mill, however special care should

Get price### Optimizing your SAG mill operation International Mining

• Can be easily retrofitted to existing mills. The optimal performance of AG/SAG mills is the key to successful plant operation. All AG/SAG mills using radial or curved pulp lifters suffer from inherent material transport problems such as slurry and pebble pooling, which decrease throughput and increase energy consumption.

Get price### Outotec Grinding Mills Outotec

We offer autogenous (AG), semiautogenous (SAG), ball, rod, and pebble mills in sizes ranging from kWs up to 30+ MW. Our product range also includes a number of unique solutions, including the world''s largest acidresistant grinding mills, which can operate with extremely corrosive slurry.

Get price### Grinding mills

Every mining operation has a unique grinding process. has experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as startup, operation, and optimization of your mill.

Get price### Optimizing your SAG mill operation International Mining

• Can be easily retrofitted to existing mills. The optimal performance of AG/SAG mills is the key to successful plant operation. All AG/SAG mills using radial or curved pulp lifters suffer from inherent material transport problems such as slurry and pebble pooling, which decrease throughput and increase energy consumption.

Get price### MacPherson Autogenous Grindability Test Mining SGS

The mill power draw, throughput and product size distribution are used to compute a specific energy input and the MacPherson autogenous work index (AWI). Although the importance to achieve steadystate in a grinding test is widely accepted (Bond tests), the MacPherson test remains the only smallscale AG/SAG mill test that offers this option.

Get price### Semi Autogenous Autogenous Grinding Mills Sag Mills Market

Semi Autogenous and Autogenous Grinding Mills Market is driven by need for energy efficient solutions as grinding consumes more energy, Semi Autogenous and Autogenous Grinding Mills are used for grinding large chunks of materials into small pieces which can be used for processing SAG Mills

Get price### Selection of Comminution Circuits for Improved Efficiency

SAG mill operation . AG/PC circuits require good control systems . Suitable . Pebble management an issue. Requires and serpentine based ores and have proven energy efficient at pilot and plant scale. • HPGRs are being considered for large (>15 Mt/a) plants treating competent a SAG mill based circuit (P80 of 106 to 150 um) has media

Get price### Autogenous and SemiAutogenous Mills FL

SAG and AG Mills operate by lifting ore/grinding media and dropping it on the operating bed of the mill charge. High impacts from lifting ore and media promote impact breakage which is the primary mechanism for size reduction in the mill. Via the use of sophistied instruments and software, we closely monitor the mill impact loion to boost

Get price### SAGDesign Test Starkey and Associates Inc.

The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S dBWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P 80.This information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial appliions.

Get price### Total Comminution Specific Energy SMC Testing

The SMC Test® is the most widelyused, industriallyproven comminution test comercially available for AG & SAG Mills, HPGRs and crushers. Total Comminution Specific Energy MENU

Get price### Used SAG Mills for Sale EquipmentMine

UNUSED 36'' X 23'' AG Mill w/1500 KW Motor and 22'' X 41'' Regrind Ball Mill 13,405 HP Total Power, UNUSED FL 40'' x 25'' Gearless SAG Mill, and 26'' x 40''6" Ball Mills, BOLIDENALLIS CHALMERS 7.3m X 2.74m SAG Mill, 9.6'' X 19.4'' EGL Wet Overflow Regrind Ball Mill,

Get 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.

Get price### SINGLE STAGE SAG/AG MILLING DESIGN

types with the advantages of being comparatively low capital cost and flexible for future expansion. The single stage SAG/AG milling option is ideal for starter projects with significant exploration and expansion potential. Currently a number of the largest SAG mills designed are installed in single stage configuration. This paper discusses the

Get price### ARE SAG MILLS LOSING MARKET CONFIDENCE?

AG/SAG mills, circuit design, plant performance, optimization INTRODUCTION AG or SAG mills have been in use in comminution circuits since the 1950''s and are considered a mature technology in most countries. However, a reasonable number of recent SAG mill based projects

Get price### Starkey & Associates Inc. Leaders in Comminution Design

SAGDesign testing provides SAG pinion energy grindability in kWh/t to within +/ 5% from 152 to 1.7 mm, and Bond Ball Mill Work Index on SAG ground ore, from the SAG test on the same sample. Starkey & Associates uses the patented SAGDesign technology

Get price### Outotec Grinding technologies

mills for both wet and dry appliions. AG and SAG mills are currently the industry standard for primary milling and Outotec provides both high aspect or low aspect AG and SAG mills to suit any appliion across the full size and power range. HPGR High Pressure Grinding Rolls are used in primary comminution. Outotec HPGR solutions are energy

Get price### (PDF) Acoustic emissions monitoring of SAG mill performance

Acoustic emissions monitoring of SAG mill performance The process state of an AG/SAG mill can be inferred from surface vibration monitoring. The method can lead to significant energy and

Get price### Comminution mechanisms, particle shape evolution and

Previously (Morrison et al., 2011), postulated five mechanisms occurring in AG, SAG mills and coarser feed ball mills: • Body breakage (single impact breakage through the particle – the traditionally conceived mechanism occurring in tumbling mills but in reality infrequent in a large SAG mill and completely absent in the pilot mill used

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