A comparison of SAG mill power models
ended (trunnion supported) mills. For flat-ended (shell supported) mills, deduct 5% from the power draw. Morrell C-Model The C-model was developed by Steve Morrell at the University of Queensland as part of his PhD thesis. The Morrell C-Model is a generalised tumbling mill model and is not specific to SAG mills.
SAG Mill Shell Liners New Material Design and Improvement
Failure analysis of the old SAG mill shell liners. Since the commissioning of φ 9.15 × 5.03 semi-autogenous mill in Baima concentrator, the operation rate is only about 55% due to the irregular damage and replacement of mill liners, which seriously affects the economic benefits. The main failure mode of the shell liner is shown in Fig. 1 (a).
Semi-autogenous grinding (SAG) mill liner design and ...
What is the top size of a SAG mill?
Shell vs Trunnion-Mounted Mills - eand.com.au
Sep 03, 2014 · Shell-mounted mills can be designed to same level of safety (risk) as trunnion-mounted mills. Shell-mounted mills with end walls directly over the main bearings are stiffer than trunnion-mounted mills both globally and locally (at the bearing journals) but this is not a parameter that should influence a mill purchase as both mill types are sufficiently stiff.
Autogenous mills, semi-autogenous mills and ball mills for ...
Shell-supported grinding mills offer special benefits to ring motor drives: xShell-supported grinding mills offer a high system sta-bility to withstand the mag-netic forces developed by Self-aligning drive pinions compensate wobbling and faulty alignment of the girth gear. Two SAG mills with rigid pinion drives. SAG mill with DOUBLE-COMBIFLEX® drive.
Semi-autogenous grinding (SAG) mill liner design and development
Semi-autogenous grinding mills (SAG mills) are tumbling mills that most commonly have a shell diameter-to-length ratio of around two. With this high aspect ratio, SAG mills generate both thrown and cascading ball-milling actions with shell linings shaped to lift and to throw alloy steel grinding balls of up to 150 mm (6 in.) in diameter. These
OUTOTEC GRINDING TECHNOLOGIES
support option can accommodate mill body splitting, making it the preferred option for large mill sizes. Shell-supported mills Our shell-supported mills are more compact, occupy less floor space, and require simpler foundations than comparable trunnion-supported mills. The feed and discharge openings can be sized to meet process
SHELL SUPPORTED GRINDING MILL - METSO MINERALS INDUSTRIES, INC.
FIG. 1 illustrates a shell supported grinding mill 1 according to one exemplary embodiment of the invention. The grinding mill 1 may be any type of mill suitable for grinding, such as a Ball mill, an Autogenous (AG) mill, a Semi-Autogenous (SAG) mill, a Pebble mill or a Rod mill, and is mainly used for grinding ore material.
Autogenous and Semi-Autogenous Mills | FLSmidth
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. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
Optimizing your SAG mill operation - International Mining
The commercially viable and industry accepted alternate is a grate discharge trunnion supported mill or a grate discharge shell supported mill using pulp lifters. The only way to eliminate the problem of flow-back and carry-over of slurry and pebbles is by optimizing the design of the discharge arrangement.
SAG and AG Mill – Amstar Corporation
Key Design Features. Robust head castings and shell fabrications resulting in low stress levels and longer operating life; Mill designs are supported by a full suite of design analysis reports including rotating body finite element analysis, main bearing fluid film analysis, drivetrain steady state torsional analysis as well as gearless mill dynamic modal analysis and system stiffness analysis
AN UPDATED DATA SET FOR SAG MILL POWER MODEL CALIBRATION
consumed at the shell of the mill. drive system efficiency, the cumulative electrical and mechanical losses between the power measurement point (PDCS) and the power available at the shell of the mill (Pshell). Austin SAG Model The SAG mill model by proposed by Leonard Austin (1990) was largely based on modifications of earlier
Shell-supported Ball Mills: Grinding Technology on a Large ...
A major ball mill manufacturer presents a persuasive case for choosing this proven — and improved — design over other types. Over many years of use, shell-supported ball mills similar to those pictured above have proven their efficiency and reliability, and a large number of mining projects would not have been viable without them.
(PDF) SAG mill circuit optimisation at Ernest Henry Mining
SAG Mill – the world’s largest shell supported SAG Mill. ( Tew, 1999) No. of Units 1 . Diameter m 10.4. Length m 5.1. Motor Power kW 11,000. Ball Charge % v/v 8 . Work Index kWh/t 10.7 ...
SAG Milling in Australia -Revised Submission
Erection itself is simple and a shell-supported mill does not require to be lifted for maintenance. With such a support structure, it is no longer necessary to increase diameter to obtain a larger mill, and there is nothing to prevent a 1:1 aspect ratio mill of, say 10 m dia. x 10 m EGL equipped with a 20 MW motor from being fabricated.
Loveday/Barratt SAG model - SAGMILLING.COM
A flat-ended (shell-supported) mill is expected to have 5% less power draw. Model Form. Loveday's equation is: Where: P is the power evolved at the mill shell, kW; P N is the empirical power number read from the chart below; D is the mill diameter inside the effective liner thickness, m; L is the mill effective grinding length (or 'belly length ...
Ball mill / sag mill shell Change - Time laps film - YouTube
The film shows a mill shell change we completed in June/July of this year. Old shell was 32' new one is 33'. For more information please visit www.fixedplant...
SAG Mill - Feed The Beast Wiki
The SAG Mill is a block added by the EnderIO mod. A machine similar to a Pulverizer or a Macerator.It is used to process resources to produce dust. It accepts energy in the form of Redstone Flux or Minecraft Joule, with an internal buffer of 100,000 RF and consumption of 20 RF per tick.
Optimizing your SAG Mill | Mining Surplus
Mar 02, 2010 · The commercially viable and industry accepted alternate is a grate discharge trunnion supported mill or a grate discharge shell supported mill using pulp lifters. The only way to eliminate the problem of flow-back and carry-over of slurry and pebbles is by optimizing the design of the discharge arrangement.
ARE SAG MILLS LOSING MARKET CONFIDENCE?
applied to the pilot plant data when selecting the SAG mill shell and motor size. Upon resolution of issues related to the mill motor and lifter design, the project only just managed to achieve the target throughput of 17 Mt/y (Figure 1). The contributing factors to higher than expected SAG mill specific energy (lower throughput) were: