Choosing a SAG Mill To Achieve Design Performance John Starkey1, Principal Consulting Engineer Sami Hindstrom2, Manager 6 0 190KB Read more Ecuaciones MillPower SAG Mills - SAG Mill Power Estimation - Hogg & Fuerstenau Model 29 82 164KB Read more #9 Sherman - The Contrarian_s Guide to SAG Mill Optimisation...
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...
Wills and Napier-Munn (2006) describe the design and operation of SAG mills SAG mills are currently the technology of choice in hard rock milling operations for reducing primary-crushed ore to ball mill feed In recent years, the trend has been towards larger-sized SAG mills with diameters of 104 m...
Nov 01, 1993· SAG mill throughput is often a bottleneck to increasing plant productivity Improved size distribution control in the mill feed can be used to increase mill production This can be accomplished by controlling blast fragmentation as a function of energy input and rock characteristics Such an approach requires the integration of rock fragmentation and comminution modeling...
SAG mill 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' (128m) in diameter, powered by a ,...
Page 1 DEVELOPMENT OF A SAG MILL SHELL LINER DESIGN AT CADIA USING DEM MODELLING By S Hart1, L Nordell2 and C Faulkner3 1Metallurgical Superintendent, Cadia Valley Operations, Orange, NSW, Australia; 2President Conveyor Dynamics Inc, Bellingham, WA USA, 3Product Support Manager, Bradken, Runcorn, Qld, Australia ABSTRACT In August 2001, Newcrest Mining contracted ,...
This document summarizes the current design criteria and the due diligence approach from Siemens in designing the next size Gearless Mill Drive, ie a 42ft mill It is a dual design approach considering, on the one hand, the experi-ences Siemens made with Gearless Mill Drive (GMD) instal-lations over the past 40 years and, on the other hand, using...
Control of -SemiAutogenous Grinding(SAG) mill weight is an example of an important process that exhibits many of these aspects Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, MS, van der Westhuizen, AP, & Mainza, AN 2009)...
Liner design has become an increasingly more important tool for the AG/SAG mill performance optimization The Sarcheshmeh copper complex concentration plant uses a SAG mill lined with 48 rows of Hi-Low type liners Because of breakage of Low type liners and cold welding, the liner replacement task of Low with new Hi type liners has ....
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 43m through 122m in diameter with powers as high as 28,000 kW...
Detailed process design criteria for both SAG and HPGR options are included in Appendix A 411 SAG CIRCUIT To produce an average 1,359 t/h at a P 80 of 150 µm, the conventional circuit is comprised of: • a single SAG mill of 1036 m diameter and 579 m length, which uses a maximum of 10,400 kW...
Pilot plant testing of large bulk samples historically constituted the traditional approach for AG or SAG design, but was gradually replaced by small-scale tests Nowadays, conducting grindability tests requiring only a few kilos of material on several samples, is a more typical approach to grinding mill design...
The two main functions of a mill liner consist in protecting the mill shell against wear and in transmitting the energy of the mill motor to the grinding charge to carry out the required size reduction in the most efficient way For a mill liner, the design as well as the liner material are to be considered The required movement of the mill charge to carry out effi-...
mill work index 114 kWh/t and an average RQD of 44% RQD values of 25% resulted in a SAG mill feed size (F80) between 55 and 60 mm and throughputs of 6200 t/h RQD values of 55% resulted in SAG mill feed size (F80) of over 70 mm and a SAG mill throughput of 5200 t/h The Batu Hijau SAG mill specific energy was a function of point load test and ....
operating SAG mills (it is not intended for design, but could help with it) Even if the mill total load is a key variable and can be indi-rectly measured with bearing pressure measurements, it was decided to discard it as an input variable The main reason is that...
May 01, 2021· ters, the influence of which on the SAG process cannot be investigated in static modeling 2 Materials and Methods The object of the study is a semi-autogenous grinding mill SAG 34 17 (the diameter of the mill is 34 feet, the length is 17 feet), which processes charges of ,...
new liner design was proposed Installing the second liner design in AG mill No 1 and converting it to SAG mill increased the mill throughput by 18% (from 413 to 489 t/h), while the liner life showed a 7% increase Measurement of the wear profiles of the second liner set indicate that the maximum wear occurs in the centre of the mill...
Jan 01, 2016· Download full text in PDF Download IFAC-PapersOnLine Volume 49, Issue 20, 2016, Pages 61-66 , RSLogix 5000, and Fact ryT lk R© are integrat d to simulate a control strategy for a SAG mill design d to keep the mill operating in the stable region by manipulating the fresh or feed The implementation of this strategy is based on standard ....
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 forc 3 Changes in grate and pan lifter designs to decrease internal mill recycle and increase throughput...
Introduction This tutorial describes how to set-up and analyze a SAG (Semi-Autogenous Grinding) mill simulation There are 12 short steps that will guide you throughout the tutorial The SAG (Semi-Autogenous Grinding) mill is a machine designed to to grind smaller particles and break larger rocks Particle breakage will not take place during this simulation The main focus is on: [,]...
operating SAG mills (it is not intended for design, but could help with it) Even if the mill total load is a key variable and can be indi-rectly measured with bearing pressure measurements, it was decided to discard it as an input variable The main reason is that...
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 forc 3 Changes in grate and pan lifter designs to decrease internal mill recycle and increase throughput...
Jan 11, 2021· 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 rat Typical tests required to define a hardness variability function, are given below in Figure 1...
Table 4 – SAG Mill Simulation Results Design Throughput (t/hr) P80(mm) P50(mm) Power(kW) kWh/t 1 1250 321 069 12750 102 2 1420 313 065 12755 90 3 1480 311 063 12749 86 As can be seen a significant increase in throughput is obtained with Design 2 with further, though proportionately much less, improvement with Design 3...
This document summarizes the current design criteria and the due diligence approach from Siemens in designing the next size Gearless Mill Drive, ie a 42ft mill It is a dual design approach considering, on the one hand, the experi-ences Siemens made with Gearless Mill Drive (GMD) instal-lations over the past 40 years and, on the other hand, using...
individual sections (the SAG section or ball mill section) As an example, Table 1 presents AG/SAG pilot plant data for an oxide gold ore Although the overall Wio is close to the BWi, the calculated figures would suggest that the AG/SAG mill is very inefficient, while the ball mill is significantly more efficient than Bond would predict...
• Sag Mill • Rod & Ball Mill • Primary and Secondary Cyclone • Thickener Feed • Flotation Feed • Tailings The SRL-XT has extra-thick rubber components that are up to three times thicker than standard rubber-lined pumps Its heavy-duty design makes it ideal for the toughest applications, especially where coarser slurries are involved...
samples historically constituted the traditional approach for AG or SAG design, but was gradually replaced by small-scale tests Nowadays, conducting grindability tests requiring only a few kilos of material on several samples, is a more typical approach to grinding mill design This paper summarises the requirements and...
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...
mill work index 114 kWh/t and an average RQD of 44% RQD values of 25% resulted in a SAG mill feed size (F80) between 55 and 60 mm and throughputs of 6200 t/h RQD values of 55% resulted in SAG mill feed size (F80) of over 70 mm and a SAG mill throughput of 5200 t/h The Batu Hijau SAG mill specific energy was a function of point load test and ....