• SAG Mill Grinding Circuit Design 911metallurgist

    Semi Autogenous Design FactorsSag Mill Operation ExampleProcess Plant DescriptionSag Mill Design and SpecificationOperating Problems Since CommissioningDesign Changes and Future Operating StrategiesThe Kidston plant was designed to process 7500 tpd fresh ore of average hardness; but to optimise profit during the first two years of operation when softer oxide ore will be treated, the process equipment was sized to handle a throughput of up to 14 000 tpd. Some of the equipment, therefore, will become standby units at the normal throughputs of 7 000 to 8 000 tpd, or additional milling capacity may be installed. The SAG mill incorporates a design which allowed expedient manufacturing to high quality specifications, a
  • SAG mills (semi-autogenous grinding mills)

    SAG mills are also an optimum solution for wet grinding since crushing and screening in these cases can be difficult, if not impossible. Efficiency through automatic operation ’s process engineers will assist you in creating an efficient software-driven process, from circuit design to start-up and optimization, to ensure you get your

  • SAG Mill Liner Design Mineral Processing & Metallurgy

    Jun 06, 2016· Metallurgical ContentMill Internals Grinding Mill Shell DesignSemi-Autogenous Mill Liners Designs Alloys and Maintenance ProceduresGood Mill Liner Alloys And Design Installation and Prudent Operational PractsGeneral Liner Design PrinciplesIdeal Liner DesignSemi-Autogenous Grinding (SAG) Mills“High-Low” Liner SystemsFully Autogenous Grinding (FAG) MillsDischarge End

  • Difference Between Sag Mill vs Ball Mill mech4study

    Oct 12, 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.

  • Choosing a SAG Mill to Achieve Design Performance

    SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rates. Typical tests required to define a hardness variability function, are given below in Figure 1.

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  • Manual design of SAG/ball/rod mill foundations

    Mar 14, 2007· You need to closely with the Mechanical design engineers involved regarding forcing frequencies and the operating frequency ranges for the mill, and will almost certainly need to carry out a full dynamic analysis of the foundation in something like Calculix or ABAQUS. Have personally never been invovled with the design of a SAG Mill

  • I have a bit of a long answer here, so I'll give you a synopsis: I don't think an design can be produced manually, and I think a preliminary design1Youngstructural a star for you. I have direct experience of a SAG mill with conflicting frequencies causing resonance and vibration problems. I hav1See the documents on this page of my website slideruleera.net/foundations.html SlideRuleEra.net1Thanks for that FOETS If you'll forgive the pun, I guess I've always been a bit sensitive to vibration problems *smiles* SlideRuleEra: GreatThanks, youngstructural always glad to hear that old information can be useful. SlideRuleEra.netIn the context of a study for a minerals processing plant worth in excess US$500m, a preliminary design (i.e. not FEM) approach to such a foundatioSorry for the late reply all; I was on vacation. dbuzz: Please do not misunderstand this reply: I appologize in advance if it seems that I am attacI think we have a case of 'the forest' and 'the trees' here youngstructural. We'll have to agree to disagree on this one, but thanks for your input
  • Starkey & Associates Inc. Leaders in Comminution Design

    John Starkey, P. Eng. has ed in SAG mill hardness testing since 1964 where he ed as pilot plant engineer for A. MacPherson’s projects. He invented the SPI and SAGDesign tests. The latter is now acknowledged by our clients to be a world-class method for grinding circuit design, and is accepted by our peers as a standard for ore

  • Outotec Grinding Mills Outotec

    Ensures the long-term reliability of your mill structure and powertrain with our unmatched mechanical design expertise Grinding mill process design. We offer autogenous (AG), semi-autogenous (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

  • 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

  • Fundamental Principles of Mechanical Design

    Oct 24, 2011· Mechanical Design Fundamentals K. Craig 3 Introduction • Precision machines are essential elements of an industrial society. • A precision machineis an integrated system that relies on the attributes of one component to augment the weaknesses of another component. • Here we emphasize the design of mechanical and structural

  • Mechanical Installation of a SAG Mill Christof Industries

    Mechanical installation of a 28' x 15,5' SAG mill including lubrication and cooling system, mill wear liner as well as commissioning assistance and surveying after trail run. Read more Christof Industries

  • Selection criteria for SAG mill drive systems IEEE

    Abstract: The various options availe for large-horsepower semiautogenous grinding (SAG) mill drive systems are examined, together with their impacts on mill design and relative capital and operational costs. A brief history of large-mill drive systems is given. State-of-the-art mill design and mechanical design considerations are also discussed.

  • Mill (grinding) Wikipedia

    SAG is an acronym for semi-autogenous grinding. 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.

  • (PDF) Continuous improvement in SAG mill liner design

    Implementation of the new design in the SAG mill was carried out, resulting in increase in daily throughput from 6 to 12%. Further, the time spent in liner change was reduced by 47% given the

  • 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 pract, for a given ore and equal processing conditions, the AG milling has a finer grind than SAG mills. How does a sag mill

  • (PDF) Selection and design of mill liners

    The mill has an unfavourably close liner spacing, with 40 rows of liners in an 18ft mill. The SAG mill drilling would conventionally be 34 rows, and this is too many ( Powell et al, 2006). These

  • SAGMILLING.COM .:. Home

    Grinding circuit design tools, including for SAG mill-ball mill circuits, and geometallurgy energy models are availe to subscribers. The online library of technical articles contain several s on metallurgical topics including comminution modelling, mass balance calculations and oratory comminution test program information.

  • Shell vs Trunnion-Mounted Mills

    Sep 03, 2014· The Ernest Henry SAG mill has this design and although it has suffered contamination of the bearing oil by mill slurry, it has operated continuously since 1997 without a structural failure. The sealing of this region has been improved by a number of pressure grooves and barriers being added to the joint in newer mills.

  • 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

  • Fundamental Principles of Mechanical Design

    Oct 24, 2011· Mechanical Design Fundamentals K. Craig 3 Introduction • Precision machines are essential elements of an industrial society. • A precision machineis an integrated system that relies on the attributes of one component to augment the weaknesses of another component. • Here we emphasize the design of mechanical and structural

  • SAG Mill Liner Nanjing Manganese Manufacturing Co.;Ltd

    Based on experience, mill liner designs have moved toward more open shell lifter volumetric capacity and a grate design to facilitate maximizing both pebble-crushing circuit utilization and SAG mill capacity. Mill throughput is maximized with shell lifters between ratios of 2.5:1 and 5.0:1.

  • Autogenous and Semi-Autogenous Mills

    Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW. Our team of product engineers continually improves SAG/AG Mill designs in order to provide the most robust, safe, and efficient grinding mills availe.

  • Ball Mill Mechanical Design Pure Line

    Mechanical Design Of Ball Mill. mechanical design of ball mill in cement grinding mill equipment A pulverizer or grinder is a mechanical dev for the grinding of many different types of Grinding in Ball Mills Modeling and Process Control mechanical and chemical characteristics Typical examples are the various ores minerals limestone etc. Get

  • Grinding Mills an overview ScienceDirect Topics

    The crushed pebbles fall directly onto the SAG mill feed belt and return to the SAG mill. SAG mill product feeds two parallel ball mills of 6.6 m×11.1 m (internal diameter×length), each with a 9.7 MW twin pinion drive. The ball mills are operated at a ball charge volume of 30–32% and 78.5% critical speed.