Modelling SAG milling power and specific energy

Modelling SAG milling power and specic energy consumption including the feed percentage of intermediate size particles M. Silva, A. Casali Mining Engineering Department, Universidad de Chile, Beauchef 850, Santiago 8370448, Chile

Autogenous and SemiAutogenous MillsFLSmidth

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. FullerTraylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

SAG MillingGrinding & Classification Circuits

The main drawback of SAGhigh power consumption. To reduce power consumption, I think: The right determine of SAG feed size. This depends on the mill diameter and the ball size. Feed size necessary to take 80% of the maximum piece of ore that will crushed by the balls. For the big SAG more than 8 meters optimal feed size will be50mm.

Modelling SAG milling power and specific energy

Two new SAG milling models are developed in this work, able to predict power or specific energy consumption, including the usual design variables such as mill size; balls charge level, solids concentration in the SAG mill feed and % of critical speed, but adding a

PDF Understanding the effects of liner wear on SAG mill

Understanding the effects of liner wear on SAG mill performanceDue to the high energy consumption of milling,The hypothesis of this work is that the increase in throughput in SAG milling

Ball Consumption In Sag Millczeu.eu

ball consumption in iron ore sag millingGrinding Mill . ball consumption in sag millball continuous crushers. consumption of grinding media in iron ore mining. ball consumption in iron ore sag milling challengenote on consumption rate of grinding machine specific energy consumption coal mill ore grade affect ball mill energy consumption .

Ball Consumption In Sag Mill

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' 12.8m in diameter, powered by a 28 MW 38,000 HP motor. Related items: Mortar and pestle, Expeller, Extruder; Ball Consumption In Sag Mill

Semiautogenous grinding mills SAG millsXin Hai

Gearless mill drive GMD technology has further expanded the use of large SAG milling allowing Xin Hai to produce the world's largest SAG mill of 42 in diameter drawing power at 28 MW. Today, Xin Hai is the world leading supplier of gearless SAG mills operating globally. Technical specifications. SAG mills' technical specifications.

ball consumption in sag mill

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.

Improving Energy Efficiency Via Optimized Charge Motion

Abstract. A research team from the University of Utah is working to make inroads into saving energy in these SAG mills. In 2003, Industries of the Future Program of the Department of Energy tasked the University of Utah team to build a partnership between the University and the mining industry for the specific purpose of reducing energy consumption in SAG mills.

Benchmarking: Specific Energy Consumption Models

Show details of benchmarking. Benchmarking: Bond/Barratt SAG Mill Specific Energy ConsumptionDetour Lake. J. TorrealbaVargas, J.F. Dupont, J. McMullen, A. Allaire and R. Welyhorsky, The successful development of the detour lake grinding circuit: from testwork to production.Proceedings of the SAG 2015 Conference, September 2015, Vancouver, Canada, Paper 38.

Modelling SAG milling power and specific energy

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.

ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION

@article{osti_895022, title = {ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION}, author = {Rajamani, Raj and Delgadillo, Jose and Duriseti, Vishal}, abstractNote = {The grinding efficiency of semi autogenous milling or ball milling depends on the tumbling motion of the total charge within the mill. Utilization of this tumbling motion for efficient breakage of particles depends on the

PDF A comparison of wear rates of ball mill grinding media

In ball milling, materials consumption by wear represents a very high production cost, and must be minimized by the proper selection of materials, especially those for balls.

Estimated Water Requirements for the Conventional

water usage. The crushed ore is transferred to a semiautogenous SAG mill or ball mill where the ore is further reduced in size. Water is added to the ball mill, in which a slurry that usually contains from about 20 to 55 percent solids is produced Singh, 2010; International Mining, 2011 see fig. 2. The

The Effects of Blasting on Crushing and Grinding

The Effects of Blasting on Crushing and Grinding Efficiency and Energy Consumption Lyall Workman1 and Jack Eloranta2 Abstract Blasting has an important impact on mining and milling well beyond the necessary ability to dig and load the ore efficiently. There is an increasing body of blasting

Mill grindingWikipedia

Ball Consumption In Iron Ore Sag Milling

Ball consumption in iron ore sag milling.As a result of that the grinding time in downstream milling process cone crusher in an iron ore sag and ball mills s to.Tyy lxp.Mill grindingwikipedia, the free encyclopedia.Compared to ball mills hpgrs are achieving a 30 to 50 lower specific energy consumption,.Like ball mills.

Ball Consumption In Sag 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' 12.8m in diameter, powered by a 28 MW 38,000 HP motor. Related items: Mortar and pestle, Expeller, Extruder; Ball Consumption In Sag Mill. Feb 14, 2016 · . the wear rate for Ball mill . in bead mills sag mill ball

AMIT 135: Lesson 6 Grinding CircuitMining Mill Operator

SAG Mill Circuit ExampleGold 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

What's the Difference Between SAG Mill and Ball Mill

SAG mills grinding media includes some large and hard rocks, filled rate of 9%20%. SAG mill grind ores through impact, attrition, abrasion forces. In practice, for a given ore and equal processing conditions, the AG milling has a finer grind than SAG mills. How does a sag mill work?

C O N S U L T I N G L T D TECHNICAL MEMORANDUM

Thus, the Etotal of a SAG and ball mill circuit is: Etotal=1.10×E5Partitioning the Total Energy Between SAG and Ball Mills The Bondbased method applied by Barratt involves deducting a SAG mill specific energy consumption, ESAG, from the overall circuit specific energy consumption, Etotal, with the difference being the ball mill specific

A simple estimation method of materials handling specific

A simple estimation method of materials handling specific energy consumption in HPGR circuits Alex Doll Sagmilling.com, Canada ABSTRACT Multi­stage crushing plants, including high pressure grinding roll HPGR circuits, require more materials handling equipment than SAG and ball mill circuits.

MillingCEEC Coalition for Eco Efficient Comminution

Freda Rebecca SAG milling circuit optimisation ABSTRACT Simulation work was carried out to analyse how feeding a finer size distribution to a single stage SAG mill in closed circuit with hydro cyclones at Freda Rebecca Gold Mine would affect throughput and specific energy consumption using an Excel based milling process simulator developed by

Operating work index is not the specific energy consumption

Oct 24, 2018· This will usually be feed belt sample in the case of a SAG mill, or a sample from a transfer pipe or launder in the case of a secondary ball mill. The operating specific energy consumption is

Model:Bond/Barratt SABC ModelsSAGMILLING.COM

Bond/Barratt Specific Energy Consumption SABC Model. This is a SAG or AG mill plus ball mill model that estimates the overall circuit specific energy consumption using the classical Bond work index equation for multistage crushing and singlestage ball milling E ssbm including Rowland efficiency factors.The circuit E total is equal to the E ssbm plus an inefficiency factor CF related to

Freda Rebecca SAG milling circuit optimisationCEEC

ABSTRACT Simulation work was carried out to analyse how feeding a finer size distribution to a single stage SAG mill in closed circuit with hydro cyclones at Freda Rebecca Gold Mine would affect throughput and specific energy consumption using an Excel based milling process simulator developed by Hinde, a comminution specialist who has worked for Mintek for many years.

SAG MillOfficial Feed The Beast Wiki

The SAG Mill is a machine added by Ender IO.It uses Micro Infinity µI to grind or mill items into their crushed variants, like Ores into Dusts.The SAG Mill has four output slots; recipes can have 14 different outputs, with different chances of obtaining those outputs. Uniquely, the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency resulting in

Energy Consumption in Mining Comminution

Energy Consumption in Mining Comminution Jack Jeswiet*, Alex Szekeres Queens University, Kingston, Ontario, CanadaIn this paper the energy needs for crushing and milling comminution are presented.fine particles in SAG SemiAutogenous Grinding or Ball mills.

Energy Use of Fine Grinding in Mineral Processing

Dec 18, 2013· Fine grinding, to P80 sizes as low as 7 m, 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 mills energy budget.

AMIT 135: Lesson 6 Grinding CircuitMining Mill Operator

AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill. Because of the range of mill sizes available, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill circuit. A diagram of types of AG/SAG

Optimizing your SAG mill operationInternational Mining

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.

SAG Mill Grinding Circuit Design

Ball Consumption In Sag Millczeu.eu

Ball Consumption In Sag Mill. Comparison of energy efficiency between ball mills . Comparison of energy efficiency between ball mills and stirred . 1970s by AG and SAG mill . Bond ball mill energy consumption in relation to mill . Get Price And Support Online; Optimizing your SAG mill operation

MEI Blog: Where are SAG mills going?Barry A. Wills

Aug 25, 2014· For the big SAG more than 8 meters optimal feed size will be50mm. Ball size120125mm. Do not a pebble crushing , the need secondary crushing. 2. Reduce the power consumption for the drum rotation of the mill. The power consumption in the mill is distributed between the drum rotating and moving the balls. The first harmful, second useful.

Ball Size effect analysis in SAG GrindingCEEC

The analysis of the influence of ball sizes in SAG grinding hasn't been developed in detail by considering the effect on process parameters inside the mill, grinding efficiency or internal classification. Historically a conventional grinding reference has been made on the empirical

Enhanced SAG MillOfficial Feed The Beast Wiki

The Enhanced SAG Mill is a machine added by Ender IO.It uses Micro Infinity µI to grind or mill items into their crushed variants, like Ores into Dusts.The SAG Mill has four output slots; recipes can have 14 different outputs, with different chances of obtaining those outputs. This machine is an upgraded version of the SAG Mill, offering increased energy storage and power use, resulting

TECHNICAL NOTES 8 GRINDING R. P. KingMineral Tech

LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp5762. 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