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sag mill mechanical design pdf

A Mechatronic Solution Design and Experience with Large ...

mum for economic design. Incidentally, large SAG mills installed as on date are located mostly in critical seis-mic zones. The structure must withstand ... Figure 2: Principle arrangement of SAG mill drive (mechanical part) Design Process In the beginning of Gearless Drives in the late 60ties the individual compo nents were

Grinding Mill Design & Ball Mill Manufacturer

SAG Mill vs Ball Mill. Ball Motion inside a SAG Mill. ... Grinding Mill Design. ... The primary consideration, then, has been to develop some mechanical means for applying these forces. The modern grinding mill applies power to rotate the mill shell and thus transmits energy to some form of media which, in turn, fractures individual particles.

Grinding Circuit Design for Adanac Moly -

design of a plant for Adanac Moly Corp. to include SAG and Ball milling. The hardness of each sample was measured in terms of SAG power index, SPI (for SAG grinding) and Bond Ball mill work index, BWi (for ball mill grinding). A further measure, the Minnovex crusher index, Ci was also measured for use in the CEET program to determine SAG

The Science of Comminution

mechanical design elements, Outokumpu considers the owner's business objectives, at the installation site, experience of the operators and the logistics of delivering the mill unit. Outokumpu Mills has a long experience in supplying mills employing rolling element bearings. Thermal expansion of the mill along the axis of rotation is

Autogenous and Semiautogenous mills -

Simplifying wet grinding with AG/SAG mills AG/SAG mills are often the optimum solution for wet grinding (achieved in a slurry 50 to 80 percent solids). AG/SAG mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill.

SAG Mill Grinding Circuit Design

Modelling SAG milling power and specific energy consumption including the feed percentage of intermediate size particles ... plant testing and its nature is considered in SAG mills design and optimisation. In many cases the feed size distribution is even more ... the SAG mill critical speed; Pc = SAG mill power consumption ...

Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill To Achieve Design Performance John Starkey1, Principal Consulting Engineer Sami Hindstrom2, Manager, Grinding Travis Orser2, Project Manager, Grinding 1 Starkey & Associates Grinding Design and Process Engineering 336 – 268 Lakeshore Rd. E. Oakville, Ontario L6J 7S4

The Selection and Design of Mill Liners - MillTraj

mills in the older plants that had many mills in parallel. In fact this is generally still the case in the multi-stream plants, where mill liner design and selection is only tackled on a cost consumables basis. However, the gains to be had through good liner design and selection are just as great as on the large SAG mills.

Comparison of Ore Hardness Measurements for Grinding …

PAPER 3 Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1, Principal Consulting Engineer David Meadows2, Manager Mineral Processing Development 1 Starkey & Associates 344-115 George St. Oakville, ON L6J 0A2


DETAILS OF INTERESTING CLAIM ... (SAG) mill and a ball mill. The SAG mills are driven by two 3.550 kW motors sharing a ... Mechanical completion of mill Line 1 was achieved and mineral loads commenced two and half months later. Following the initial 30 hours testing with an approximate load of 400 tons per hour, the line was

Mill (grinding) - Wikipedia

SAG is an acronym for Semi-Autogenous Grinding. SAG mills are autogenous mills but 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.


SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING Tony Moon, RTZ What I'd like to talk about is probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use vibrating screens or trommel screens? What many of you probably don't realize is that at

Autogenous and Semi-Autogenous Mills

Autogenous and Semi-Autogenous Mills The optimum solution for wet grinding. 2 AG/AG Mills AG/AG Mills 3 's AG/SAG mills accomplish the same size reduction work as 2 or 3 stages of crushing and screening ... of disciplines ranging from mechanical design and metallurgy of materials to process engineering and instrument application. Desired


STEPPING FORWARD: USING VARIABLE SPEED DRIVES FOR OPTIMIZING THE GRINDING PROCESS IN SAG AND BALL MILLS *I. Atutxa and I. Legarra . Ingeteam Power Technology . ... depending on the application) is the link between the electrical energy source and the mechanical load, the tumbling mill. Most of the times these systems adopt the so called ...

Ball Milling - University of Massachusetts Boston

Ball Milling An efficient and ecologically friendly synthetic approach ‐‐‐ Jackie Ding

Ball mill - Wikipedia

The ball mill is a key piece of equipment for grinding crushed materials, and it is widely used in production lines for powders such as cement, silicates, refractory material, fertilizer, glass ceramics, etc. as well as for ore dressing of both ferrous and non-ferrous metals. The ball mill can grind various ores and other materials either wet or dry.

Autogenous mills, semi-autogenous mills and ball mills for ...

supported grinding mills up to the largest sizes. SAG/ball mill circuit incorporating pebble crushers and a POLYCOM® high-pressure grinding roll. SAG and ball mill for gold ore grinding. One of three SAG mills with 9.75 m diameter and 2 x 4000 kW drive power. These mills operate in conjunction with ball mills for iron ore grinding in Iran.


mill lining system design. Composite Rubber Shell Plates: At Weir Minerals we see no limitation in converting any mills throughout the world to composite rubber shell plates. These plates combine the best characteristics of metal alloys and rubber to obtain a superior design for use in AG/SAG or general grinding ball mills.

Liner Design for Improved SAG Mill Performance - AusIMM

These developments are in response to the growth in size of SAG mills and the use of larger ball loadings and ball sizes in modern SAG milling practice. Shell liner developments include specific mechanical design features such as special bolting, directed metal flow to prolong liner life and a focus on the process aspects of the mills to ...

Grinding in Ball Mills: Modeling and Process Control

Grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical, mechanical and chemical characteristics. Typical examples are the various ores, minerals, limestone, etc. The applications of ball mills are ubiquitous in mineral

manual of applied machinery design - University of Michigan

MANUAL OF APPLIED MACHINERY DESIGN HERBERT H. ALVORD Mechanical Engineering University of Michigan . CONTENTS I. INTRODUCTION 1. Machine Design Procedure 2. Things to be Considered ... with the practical aspects of design. The theory of machine design is well covered in textbooks, and so is not repeated here. 1. MACHINE DESIGN PROCEDURES

Ring gear drives huge grinding mill | Machine Design

By this summer, a grinding mill that is bigger around than a Boeing 747 will turn chunks of copper ore into gravel-sized bits for smelting and refining. The largest ring gear will make it happen

A Method of C alculating Autogenous/ Semi-Autogenous ...

SAG mills mimic the same shortcoming. It follows that in order to obtain the specifi c energy (SE) to achieve a certain transfer size, based on the 80 per cent passing value, an ineffi ciency factor must be applied to the SE of single stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method.


DESIGN OF AG/SAG MILL CIRCUITS USING THE SMC TEST. Conference Paper (PDF Available) ... The appropriateness of the transfer size in AG and SAG Mill Circuit Design.


TECHNICAL NOTES 8 GRINDING R. P. King. 8-2 &ROOLVLRQ 5ROOLQJ ZLWK QLSSLQJ ... LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. ... The no-load power accounts for all frictional and mechanical losses in the drive system of the mill and can be calculated from No load power

Design for sampling—preliminary exploration - SAIMM

Design for sampling—preliminary exploration Feed sizing Product sizing/rate Circulating load sizing Circulating load rate Mill filling—balls and ore independently SAG mill load sizing (usually an estimate). Flotation circuits Feed rates Feed grades Froth flows Froth grades Percent solids.

(PDF) A mechanistic model of SAG mills - ResearchGate

A mechanistic model of SAG mills . ... the model has been applied to describe grinding in a ball mill, where the mechanical environment was predicted using the Discrete Element Method and breakage ...