The Optimization of Process Parameters of Large-Scale SAG Mill

The Optimization of Process Parameters of Large-Scale SAG Mill. Article Preview. Abstract: This paper is based on the kinetic theory of ore and steel balls in the SAG Mill and theoretical research of power consumption. Orthogonal method is taken to design experimental plan while effective power of the SAG Mill, collision times between steel

Expert mill control at AngloGold Ashanti

The ROM SAG mill circuit—a brief description The typical ROM SAG mill circuit is depicted in Figure 1. The circuit is usually closed with either a screen or, more commonly, a cyclone for product size classification. The focus of control can be divided into two parts, viz. the mill and the cyclone. The importance of cyclone performance should

Predicting Liner Wear in a SAG Mill using Rocky DEM coupled

Mining companies can realize significant cost savings simply by slowing peak wear rate without compromising throughput, an outcome that calls for optimizing both the liner design and operating process parameters. Likewise, changes to the mill lifter design and/or its operation can result in reduced power draw and therefore energy costs. As SAG

SAG mill optimisation modelling | Axora

This digital model of the SAG mill uses advanced data analytics and the latest machine learning techniques to optimise its operating parameters, such as grinding ball charge, mill load and feeder strategy, and throughput. The solution enables process specialists to model different parameters to adjust for varying types of ore without disrupting production, enhancing operational efficiency at

Consistency Measurement and Control in a Tissue Mill

Consistency Measurement and Control in a Tissue Mill • The Often Neglected Parameter, 2011 PaperCon Conference Please Note : This document will be available in PDF format in the "My Electronic Documents" link on the home page once your order has been completed.

SAGDesign Test | Starkey and Associates Inc

The calculated cumulative mill revolutions to 80% passing 1.7 mm is used together with the mass of the SAG mill charge to compute the SAG mill specific pinion energy, as seen below. The process to determine the revolutions is done in cycles, with the -1.7 mm material (fines) removed from the mill after each cycle up to 60% passing 1.7 mm.

How to Set Parameters in Ansys | Ansys Parametric Study

In this Video We Will Learn how to Add or Set Parameters in Ansys for multiple study and how to use parameters for mesh convergence or Mesh Independence


semiautogenous grinding (SAG) mills and is the last in a five-part series on Inferential Measurement of SAG Mill Parameters. Inferential measurements of SAG mill discharge and feed streams and mill rock and ball charge levels, detailed earlier in the series, are utilised in a simulation environment.

diffrent type process parameter in cement ball mill

ball mill parameter reading in cement industry. maintaince parameter of different ball mill used in cement Given parameters are for two different ball charges depending on the crushability Advanced process control for the cement industry FL get the most out of its cement plant easy to use and manage – and its a kiln because of the different Ball mill grinding is a highly Mill draft •

SPI® - A Decade Later - SGS

fixed speed laboratory scale SAG mill, with iterative grinding and screening sessions bringing the ore charge to a standard product size distribution. The time required to do this standard size reduction is the SAG Power Index for that ore sample. Since all of the test parameters are fixed a higher SPI ® means that more grinding was needed to

SAG Mill Circuit Example — Gold Processing

AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill. Because of the range of mill sizes available, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod

SAGwise™ total process control The key to efficient SAG mill

SAGwise total process control manages all key parameters: Parameters monitored: Mill power consumption Load impacts Mill load Pulp density Parameters controlled: Mill speed Feed rate Mill water The result is precisely what you hope to achieve with your SAG mill optimisation efforts: not only higher production and optimal energy

Optimizing Performance of SABC Comminution Circuit of the

the SAG mill and ball mill was 8658 kW, which caused partial over-grinding. From experience in adjusting and optimizing equipment and process parameters related to the SABC comminution circuit to maintain a more even distribution of equipment capacity. 1.2. Requirement for Circuit Simulation

New project in Russia with semiautogenous mill selected

AG/SAG index for the studied ores varied within the wide range from 11.94 to 18.14 KWh/t. The highest ore hardness in the process of AG/SAG grinding is noted for sample , the lowest – for sample No.5. The values of modified Bond ball mill work index for the product of AG/SAG mill varied from 18.68 to 23.04 KWh/t.

A structured approach to the evaluation of the energy

For this study, the SAG mill simulations utilized breakage constant parameters based on a comparable size mill that had been surveyed in the past (AMEC, 2006) (AMEC, 2007), and the ore characteristics from grindability testwork as per the developed design criteria. Usually, several tests are conducted

Inferential measurement of SAG mill parameters II: state

Dec 01, 2002 · This paper discusses the combined state and parameter estimation of SAG mill inventories and model parameters. Recognised simulation models are utilised for the rock and water charge state equations. New models of the ball charge and mill shell lining states are presented. The 36 state system is detectable although not completely observable.

SAG Mill Grinding Circuit Design | Mineral Processing & Metallurgy

SAG Mill Operation Example. Process Plant Description. SAG Mill Operation. In order to initiate the design of any mill, including. autogenous and semi-autogenous types, the operating conditions must be defined. This includes the basic parameters of

Milling Parameters

*The stated cutting speeds are average values. In result of the milling process and the type of end mill adjustments might be necessary . Roughing: Reduction of up to 25 % – Finishing: Increase of up to 25 % – HSS end mill: Reduction of up to 50 % (hard materials) – VHM end mill: Increase of up to 25 %

PDF Modelling SAG milling power and specific energy consumption

Comminution, particularly milling, is on average the largest consumer of energy in mining. Actual com-minution circuits consist in most of the cases in In these circuits the SAG mill is the largest energy consumer. In many engineering projects either a power equation and/or a specic energy equation are


The Axb parameters, which were used to determine SAG mill throughput, are inversely related to the core competency. That is, the lower the value, the more competent the ore and the lower the throughput for a given SAG mill geometry and operating condition.

SAG Mill Process Control - Grinding & Classification Circuits

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Grinding. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else’s


SAG/AG milling option is ideal for starter projects with significant exploration and expansion potential. Currently a number of the largest SAG mills designed are installed in single stage configuration. This paper discusses the challenges associated with the process design of single stage SAG/AG milling circuits, the design flexibility required to


Sep 23, 2020 · However, engineering understanding of mill operation and key process parameters permits effective scale‐up of milling, so that the particle size to

How to Identify Critical Quality Attributes and Critical

Oct 01, 2015 · Critical Process Parameter (CPP) – A process parameter whose variability has an impact on a CQA and therefore should be monitored or controlled to ensure the process produces the desired quality. (ICH Q8) Critical Material Attribute (CMA)* – A physical, chemical, biological or microbiological property or characteristic of an input material

Predicting Liner Wear in a SAG Mill using Rocky DEM

Mining companies can realize significant cost savings simply by slowing peak wear rate without compromising throughput, an outcome that calls for optimizing both the liner design and operating process parameters. Likewise, changes to the mill lifter design and/or its operation can result in reduced power draw and therefore energy costs. As SAG