The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure. The solution automatically controls ore master feed rate and water addition to increase
Optimizer is a complete solution for the design, development, simulation ... Increasing Productivity Without Capital Expenditure 4 ... Figure 5 – Long-term trend (1day/interval) for pebble crusher feed rate (SAG mill recycle) Figure 6 – Long-term trend (1day/interval) for cyclone feed rate (from ball
increase) the SAG mill would need to increase to: Kutcho Creek is a massive sulphide copper and zinc deposit in Northern BC, Canada, which is being engineered to operate at a milling rate of 4000 tonnes/day.
Optimization of the Design of SAG Mill Internals Using High Fidelity Simulation by John A. Herbst Svedala Optimization Services and Lawrence Nordell Conveyor Dynamics, Inc. ... precisely wear rates (Qiu, etal, 2001) and breakage rates (Nordell, et al, 2001) for different internal
Page 769 MINING AND MINERAL PROCESS ENGINEERING, UBC - Vancouver, 6. C. Canada AG AND SAG MILL CIRCUIT SELECTION AND DESIGN BY SIMULATION Dr. S Morrell' and Dr. R D Morrison2
A new autogenous and semi-autogenous mill model for scale-up, design and optimisation. Author links open overlay panel S. Morrell. Show more. ... Variation in the fitted breakage rate distribution from a full-scale SAG mill.
Design-and-Configure-SAG-Mill-Liners-for-Maximum-Tonnage-Performance SAG-Mill-Liner-Design SAG-Mill-Liner-Design-1 Mill Internals As with rod and ball mills liner designs for autogenous and semi-autogenous mills have been in a state of flux for a number of years.
Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills. Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm).
Sagmilling.com is home to a collection of both free and subscription-based calculation tools to aid metallurgical process engineers perform comminution calculations. Grinding circuit design tools, including for SAG mill-ball mill circuits, and geometallurgy energy models are available to subscribers.
of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from ... focused on grinding rates and the second on discharge in SAG/AG mills. It is important to separate the two and acknowledge the test work was conducted together, with the design
For design operating conditions was required. operated at a lower design processing rates of the Cadia Hill SAG mill circuit and that could volumetric filling 25-27%.
SAG mill feed size distribution - OneMine Mining and Minerals Matches 101 - 110 of 646 Showing: 101 to 110 of 646 matches for SAG mill feed size and screening of material from the SAG mill feed conveyor has indicated in SAG Mill throughput from finer feed .
The Selection and Design of Mill Liners . ... Mines (WA) 36ft SAG mill the number of Outer Head Liners was reduced from 36 to 18 pieces and in doing so reduced the time to replace them by 9 hours at a cost downtime saving of about U$25,000 per hour. In this case the liners sections are 3.5 t each. ... and wear rate, and provided a more ...
SAG mills. The design SAG mill specific energy was calculated on the basis of the pilot plant results, supported by analysis of the bench-scale test work. Estimates of SAG mill power requirements had varied ... control of the grinding media volume based on wear rates within the SAG mill,
As the ball wear rate depends directly on the surface of the media charge, a small variation in power will lead to an important increase of wear rate. The risk of underloading or overloading the mill is an additional factor. ... Mill speed Soft design Aggressive design
John Starkey, P. Eng. has worked in SAG mill hardness testing since 1964 where he worked 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 ...
The first step in the design of a robust controller for the SAG mill involves obtaining linear dynamic models (expressed as transfer functions) for the impact of the manipulated variable (i.e. feed flowrate) and the disturbance (i.e. the F 80 parameter) on the variable to be controlled (i.e. the SAG mill power draw).
Mill motor gear drives can be offered for AG/SAG grinding mill as dual pinion drives with power deliver of up to 20 MW (2 x 10,000 kW), and this can be accomplished on mill sizes up to 36 ft in diameter.
SAG mill operation is more dynamic, and typically requires a higher degree of process control sophistication. ... SAG Mill Grinding Circuit Design. View Larger Image ... Critical-sized particles are those where the product of the mill feed-size distribution and the mill breakage rates result in a buildup of a size range of material in the mill ...
A SAG mill with a 44' (13.4m) diameter and a power of 35 MW (47,000 HP) has been designed.  Attrition between grinding balls and ore particles causes grinding of …
SINGLE STAGE SAG/AG MILLING DESIGN ABSTRACT Single stage semi-autogenous / autogenous (S/AG) milling has become a common design for a variety of ore ... xLoad stability with large rock size and a small mill volume. xPebble extraction rates and discharge designs in the pilot mills.
The effects on mill performance of a varying ratio of these two components in the mill feed are not well described by the current generation of AG/SAG models (Stange, 1996).
grinding mills. Grinding mills supplied by FL have their origins dating back to the ... 1902 and many of the largest plants operating today have these world renowned SAG and Ball Mills operating in some of the most extreme environments. The Vanderbijl Engineering Corporation (VECOR) was ... The design features cast mill heads with ...
Following a successful commissioning and start-up, we believe that two grinding lines at Las Bambas, Perú, each consisting of one SAG Mill and one Ball Mill (this mill combination is uniquely specific to Las Bambas ore types), are operating at design throughput of close to 140,000 tpd and within the range predicted by DJB from a managed multi-sample geometallurgical testing program (i.e., no ...
SAG Mill I-12 Ř Effect of SAG Mill Feed Size Distribution and Ore Variability Ř Mill liner design modifications, and Ř Circuit Design, and was commissioned with 70mm grates has been challenging A number of operational and.
Constancia, SAG milling, layout, design . INTRODUCTION . ... Ore Type Maximum Mining Rate, t/h Year 0.5 1 2 4 to 6 7 ; ... Constancia's SAG mill F80 is likely to be less than 70 mm. The average RQD for the Constancia comminution hypogene samples was less than 20%. As a result, Ausenco's standard model was adjusted to
FOR DESIGN, MODELLING AND CIRCUIT OPTIMIZATION P. Scinto, A. Festa, B. Putland ... have almost become obsolete in the move to higher milling rates required to process lower metal grades. Grinding circuits with fully autogenous (AG) or semi-autogenous (SAG) mills, often ... The number of SAG mill revolutions required to grind the
SINGLE STAGE SAG/AG MILLING DESIGN ABSTRACT Single stage semi-autogenous / autogenous (S/AG) milling has become a common design for a variety of ore types with the advantages of being comparatively low capital cost and flexible for future expansion.)
1 Optimization and Control of a Primary SAG Mill Using Real-time Grind Measurement C.W Steyn*, K Keet**, W Breytenbach*** *Control Engineer, Anglo American Platinum, Control and Instrumentation Department, Johannesburg,
Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, M.S., van der Westhuizen, A.P., & Mainza, A.N. 2009).
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.
Proceedings of the 39th Annual Canadian Mineral Processors Conference – 2007 124 ABSTRACT The Cortez SAG mill liner design was recently modified to improve the mill operating energy efficiency. In addition to the expected benefits, the design change unexpectedly played a
Copyright © 2018.Company REM All rights reserved.sitemap