123 PAPER 9 SAG Mill Operation at Cortez: Evolution of Liner Design from Current to Future Operations Julius Stieger1, Process Superintendent Dave Plummer2, Process Maintenance Planner Sanjeeva Latchireddi3, Chief Process Engineer Raj K. Rajamani4, Professor – Metallurgical Engineering 1Barrick - Cortez Gold Mines Star HC66 Box 1250
Outotec Turbo Pulp Lifter is a discharge system that can be retrofit to existing AG/SAG mills where site require increased throughput, energy efficiency. TPL systems are designed specifically for each application using modelling and simulation tools to ensure the delivery of a product that has been optimised for the process.
Overflow, peripheral, grate and open-ended discharge options are available. SAG and AG mills typically have grate discharge arrangements which can be either with or without trommel screens. SAG and AG mills with open-ended discharge arrangements are usually more efficient than those with grate discharge arrangements. Trommels
Oct 12, 2017· Today we will learn about difference between sag mill vs ball mill. A mill is a machine by which solid or hard materials are broken into smaller pieces by means of grinding, crushing or cutting. This commutation is an essential part of many processes. Various kinds of mills are there with which different material processing takes place.
(SAG) mills. In order to optimize this section, the skills to accurately model and understand its underlying mechanisms are required. The literature exposed a clear lack of previous research on the influence and performance of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from
Based on the analysis and understanding of the mechanism of slurry removal system in ag/sag mills operating with conventional pulp lifters, Latchireddi and Morrell, 1997a, Latchireddi and Morrell, in press-a, Latchireddi and Morrell, in press-b have summarized the slurry transportation process in grate discharge mills as shown in Fig. 2.
angle increases the mill's outlet flow. Keywords: grate, SAG-Mill, DEM-Simulation, flow-back, carry-over 1. Introduction Size reduction of ores has an important role in the process of obtaining various metals. For example, for copper the ore must be separated from the mineral and …
Thus inlets in sags capture of the flow and produce no bypass flow. Note that Drop Curb inlets are always in a sag. Inlets in sag locations operate as weirs under low head conditions and as orifices at greater depths. Orifice flow begins at depths dependent on the grate size or the curb opening height.
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.
> Engineering approaches have highlighted mill performance with mill modelling and the use of improved materials > Liner design,with the advent of large diameter SAG mills, the issues of design, selection, monitoring and evaluation of mill performance is critical > Mill trajectory modelling can be used to great effect in improving liner design
PDF | On Sep 1, 2001, R. Dunne and others published Design of the 40 foot diameter SAG mill installed at the Cadia gold copper mine | Find, read and cite all the research you need on ResearchGate
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.
SAG Mill Liner Design - Mineral Processing Metallurgy. 2019-11-16 To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design
The SAG mill pinion energy is determined from the SAGDesign™ testwork results as follows : W SDT = revs (16,000 + m s)) / (447.3 m s) where : W SDT = AG/SAG Specific Pinion Energy from a F 80 of 152.4 mm to a T 80 of 1.7 mm, kWh/ton ground revs = Cumulative number of SAG test mill revolutions to 80% passing 1.7mm m s = SAG mill feed sample ...
of SAG mill performance through 1. Changes in liner/lifter design to maximize throughput while maintaining acceptable wear levels. 2. Changes in ball size to maximize particle breakage without producing exceptionally high impact forces. 3. Changes in grate and pan lifter designs to decrease internal mill recycle and increase throughput.
Continuous Improvement in SAG Mill Liner Design to Increase Hard Rock Throughput, Taghimohammadi, Grignon, Sherman, & Virani. 34. 13:45. The Design and Evaluation of SAG Mill Liner Trials, Toor, Valery, Brennan, & Duffy. 35. 14:00. Grates Plugging in High Diameter SAG Mills: An Overview on Operational Analysis, Olmedo & Rioseco. 36. 14:15
sag mill design pdf Liner design needs to respond to the process aspects of mill.The test and study work showed that a single line 42 ft SAG mill circuit gave the. sag mill grate design SAG mill design, GMD design and the associated component manufacturing.Key Words: SAG mill, design, optimum conditions, grinding, pilot testing.
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 ... the mill from the grates in the slot between the grates and the head. The oversize falls
5 Low ball charge SAG mill, high mill speed. (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive ores. As typically operated in RSA. 6 SAG mill (configurations 3, and 5 ) with recycle crusher Competent ores, better suited to coarse grind sizes as circulating loads can be high 7 SAG mills treating partially or fully
SINGLE STAGE SAG/AG MILLING DESIGN Brian Putland 1, Fred Kock & Leigh Siddall1 ... For these reasons the simulation of a single stage SAG mill for greenfield design using ... first based on the required slurry flow with typical grate and pulp lifter performance and the Effective Grinding Length. 1.
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 ...
Slurry flow in mills: Grate-pulp lifter discharge systems (Part 2) ... semi-autogenous (SAG) and grate discharge ball mills. The performance of the pulp lifters in conjunction with grate design ...
Optimization of mill performance by using online ball and pulp measurements Soon after a stop, a mill is a dangerous place to enter for the personnel tasked with taking measurements or samples. Crash stops are difficult to handle. The mill and all feed streams should be stopped simultaneously but, often, they are stopped around about the same time.
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
Pulp lifters, also known, as pan lifters are an integral part of the majority of autogenous (AG), semi-autogenous (SAG) and grate discharge ball mills. The performance of the pulp lifters in conjunction with grate design determines the ultimate flow capacity of these mills.
Jan 08, 2016· In this training module, we'll cover the workings of a semi-autogenous grinding mill, or SAG mill, that's designed to be the first stage of a grinding circuit. Ore that's crushed in a primary ...
sag mill grate design. AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND . This paper discusses the challenges associated with the process design of single stage mills the design flexibility required to ensure a robust circuit and the operating techniques adopted formation due to grate and pulp lifter restrictions on the ensuing high flow which single SAG mill a two stage grinding circuit is ...
Overflow Versus Grate Discharge Ball Mills: An Experimental Investigation It has been widely accepted to go for grate discharge ball milling when a coarse product is preferred or to avoid production of extreme fines, but overflow discharge mills are preferred for their simplicity of design …
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