In the first three years of continuous operation, Vale investigated different alternatives for improving the circuit's performance by investigating operating conditions, mainly focusing on the SAG mill. It was decided to further assess the performance of the comminution circuit as a function of ore characteristics.
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,
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.
As a result, mines have shifted their emphasis in optimization from ball mills to SAG mills. The rock load in the mill essentially depends on ore characteristics and the discharge rate of broken particles through the discharge end. The discharge rate depends on how efficiently the …
47th ©Annual Canadian Mineral Processors Operators Conference, Ottawa, Ontario, January 20-22, 2015 SAG MILL: OPERATING PHILISOPHY Prior to the expansion, Bell Creek was a two-stage crushing and ball milling operation. The fact that the operational team was new to SAG milling, accentuated the need for the development of a 'site best
· AG with a crusher + ball mill · SAG-Single Stage · SAG with ball/VERTIMILLTM 's process engineers welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of the milling plant. Our engineers can specify or supply computer control systems for the sophisticated ...
The behavior of the SAG mill circuit is multivariable i.e. exhibit complex interactions and non- ... Model Predictive Control for SAG and Ball Mill Control Real Time Optimization based on a model predictive controller is considered a better approach to SAG and ball mill control.
The SAG Power Index (SPI) test (Starkey & Dobby, 1996) uses a benchscale SAG mill test to - determine the specific energy of an industrial SAG mill. The test is operated in closed circuit and the time required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG …
proposed flowsheet consists of existing SAG mill circuit followed by a new proposed ball mill in closed circuit with the existing hydrocyclone package. In all simulations, SAGT, CYCL and MILL models were selected to simulate SAG mill, Hydrocyclone packages and ball mill units. SAGT and MILL models both are based on the population balance model ...
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.
SUSTAINABLE OPTIMISATION OF THE BELL CREEK SAG MILL D. Felsher1, G. Leavoy1 and *T. Banerjee2 1. Lake Shore Gold 3160 Florence Street Porcupine, ON, Canada P0N 1C0 2. Portage Technologies Inc. ... milling circuit with a single stage crusher and a low aspect ratio SAG mill.
PDF | On Sep 1, 2001, S. Hart and others published Optimisation of the Cadia Hill SAG mill circuit
Nov 04, 2010· This would clearly show the effect of the coarser, top bench fragmentation on mill throughput. At the end of each survey, the SAG mill was crash-stopped and the rock and ball loads were measured. The survey sample sizing data were then used for mass balancing and calibration of crushing and grinding circuit steady-state models.
Optimization using model predictive control in mining | 3 $6.62B Fiscal 2014 sales 80+ countries 22,000 employees Rockwell Automation at a glance Leading global provider of industrial
INCREASING SAG MILL CAPACITY AT THE COPPER MOUNTAIN MINE THROUGH THE ADDITION OF A PRE-CRUSHING CIRCUIT . Dave Rose. 1; David G. Meadows2; Mike Westendorf3 . 1 Global Director, Commissioning and Optimization, FL USA …
Each EfficiencyExpert™ solution is custom tailored to your specific needs, these projects can include; grinding circuit automation and SAG mill optimization, image analysis & expert control on conveyor feed, froth flotation image analysis and optimization, thickener/floc automation, and KSX's adaptive decision making software.
optimization of the SABC comminution circuit, focusing on the primary (SAG mill) and secondary (ball mill) grinding mills, and estimating the outcomes of changes to circuit operating parameters (e.g., feed rate, mill load, ball charge, etc.).
When operating a grinding circuit (at Granny Smith) under a wide range of conditions: campaigning very competent underground ore followed by soft oxide, primary versus secondary crushed feed and finally single-stage SAG and conventional SAG, ball mill and pebble crusher (SABC) configurations. Economics changed and a review of the circuit performance including modelling and simulation resulted ...
Outotec ACT grinding optimization system The Outotec ACT grinding optimization system is a customized control application for grinding circuits. It ensures stable conditions in the grinding circuit, optimal particle size for downstream processes, and increased throughput with …
Mill speed is varied by changing the frequency of the current to the motor. The ringmotor can be used to inch and spot the mill for maintenance. Our engineers welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of the milling plant.
11.30 Optimization of the SAG mill-pebble crusher circuit by controlling crusher operational parameters H. Li (FL A/S, Denmark), M. Evertsson (Chalmers University, Sweden), M. Lindqvist (FL A/S, Denmark), E. Hulthen and G. Asbjörnsson (Chalmers University, Sweden) 11.50 Results from installing turbo pulp lifter (TPL) in Ahafo SAG mill
A proper model is an invaluable tool for circuit optimization. Depending on your needs, a variety of software can be used for steady-state or dynamic simulation of comminution circuits. Modeling and simulation also provide information to help select the best equipment and plant layouts during new circuit …
suitable mill feed size – which varies according to the crushing/grinding circuit – can achieve up to a 30% increase in throughput. Following an initial benchmarking of an operation's practices, SRK can advise on how value-added blasting will deliver improvements in both mill capacity and overall consistency of performance. SRK
SAG Mill Grinding Circuit Design &#;' EGL SAG mill, a Raptorpebble crusher and two' x'ball mills. optimization of the SAG mill in terms of discharge grates, ball size and slurry Ore grades averaged.% Cu with a copper recovery of approximately%. Learn More
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. September, 2001 ABSTRACT High Fidelity Simulation of SAG milling is a technique, which uses DEM, CFD and FEM to
Sossego was the first Vale SAG mill operation to process copper-gold ore. It is located in the State of Para, southeastern Amazon region of Brazil. In the first three years of continuous operation, Vale investigated different alternatives for improving the circuit`s performance by investigating operating conditions, mainly focusing on the SAG mill.
Feb 18, 2019· Ball Mill Design/Power Calculation LinkedInA wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a …
Optimisation of a Fully Autogenous Comminution Circuit by CW Steyn A dissertation submitted in partial ful llment of the requirements for the degree
PDF | Kinross Paracatu and Process Technology and Innovation (PTI) have reviewed and optimized the operating strategies for the SAG mill circuit at Paracatu operation in Brazil. The focus of ...
Semi-Autogenous Grinding (SAG) mill and a ball mill. The SAG mill circuit also includes a single-deck screen and a cone crusher while the ball mill circuit utilizes ... optimization study of the circuit performance was conducted to improve the product fineness through circuit surveys, experimental lab work and simulations. In three full