image

CONSTED is a leading and pioneering enterprise with the most advanced international level in R&D, manufacturing and selling of large-scale crushing & screening plants , industrial milling equipments and beneficiation plants.

contact info

social networks

*C. Wang, S. Nadolski, O. Mejia, J. Drozdiak, B. Klein

overall process plant energy consumption and having an efficiency of as low as 1% ( Abouzeid and ... conventional SAG mill based circuits, a pilot -scale study was conducted to compare the energy ... mill testing to determine the key operating parameters for flowsheet design and power -based calculations.

High-pressure grinding rolls: model validation and ...

function parameters. When the breakage distribution func-tion becomesbimodal,Eq.1andEq.2areusedsimultaneously. Thus, the parameters are k, n1, n2, n3 and Y0, which is the largest chip size (which must be smaller than the parent size dpj). It usually takes values of 0.05m to achieve the ball mill breakage function [19]. For calculation purposes ...

SAGwise™ total process control The key to efficient SAG ...

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

COMPARISON OF HPGR - BALL MILL AND HPGR - STIRRED …

comparison of hpgr - ball mill and hpgr - stirred mill circuits to the existing ag/sag mill - ball mill circuits by chengtie wang b.eng., university of science and technology beijing, 2009 a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science in …

(PDF) Multi-component AG/SAG mill model

For this purpose, the strength properties of the SAG mill feed and product were specified by different techniques, including the point load index, impact breakage parameters (A × b), abrasion ...

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

EDEM | Scientific.Net

The Optimization of Process Parameters of Large-Scale SAG Mill. Authors: Xiao Bo Huang, Ya Yu Huang, Dian Feng Sun 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 ...

STEPPING FORWARD: USING VARIABLE SPEED DRIVES FOR ...

That parameter has a direct impact n almost all o of the parameters in the system, itbeing able to be moved to another operation-zone just by itself. is easy to change Th parameter is the mill speed. The whole grinding process is heavily conditioned by the mill speed. The mill …

Boost the performance of your SAG Mill

Enhanced mill performance. SAGwise total process control uses specially designed acoustic sensors and proprietary process control software to monitor and respond to critical impacts inside your SAG Mill. Conditions inside your mill are automatically adjusted to minimise liner damage, stabilise and then optimise the operation of a SAG Mill.

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 …

TECHNICAL NOTES 8 GRINDING R. P. King

LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...

FREDA REBECCA SAGMILLING CIRCUIT OPTIMIZATION

SAG mill in closed circuit with hydro cyclones at Freda Rebecca Gold Mine would affect through put and specific energy consumption using an Excel based milling process simulator developed by Hinde, a comminution specialist who has worked for Mintek for many years.

Chapter - M MODELLING, SIMULATION, OPTIMIZATION

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 of grinding process.

Experimental Study of Operational Parameters on Product ...

parameters on the grinding of SAG mill have not been observed. In this study, the optimization of operational parameters of the SAG mill to decrease the s ize of final product or to increase the mill

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator ...

SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill

Inferential measurement of sag mill parameters IV ...

Oct 01, 2009· SAG mill fractional total filling (J t) and ball filling (J b) are determined by solving the powerdraw or mill weight residuals given mill power draw or weight process measurements as inputs. SAG mill fractional rock charge filling (J r) is calculated by difference of the total and ball charge fractions, see Eq. . (11) J r = J t-J b

Comminution testing - JKTech - University of Queensland

Jul 30, 2020· The Integrated JK Drop Weight Test provides ore specific comminution parameters that are used in the JKSimMet software to analyse and/or predict crusher and AG/SAG mill performance. This allows for optimisation of current circuits or flowsheet design for new circuits. Developed at JKTech, the Integrated JK Drop Weight & SMC Test is a single ...

The Pulp and Paper Making Processes

A typical layout of a mill using the kraft chemical pulping process is shown in figure 2-1. Mechanical, semichemical, and sulfite pulp mills differ in detail, particularly in wood preparation, fiber separation, and bleaching, but many of the downstream refining,

SAG Mill - Grinding Solutions Ltd

Grinding Solutions offers the following tests for SAG mill testing and/or sizing. JKTech Drop Weight The JKTech Drop-Weight Test measures the breakage characteristics of an ore for five size fractions in the range of 13 to 63 mm, at various energy inputs (0.1 to 2.5 kWh/t). The ore-specific parameters derived from these measurements can be used in grinding circuit...

The engineering and process effects of choosing a motor ...

during mill operation as the operating parameters vary. The SAG mill power draw model of Austin (using the cali-bration by Doll, 2013) is used to predict the process power draw at the mill shell, Pshell, and the efficiency losses for the drive's mechanical components based on Doll (2012) are used to determine the motor output power, P. The

PARAMETER OPTIMIZATION OF LARGE SAG MILL LINER BASED …

Jun 17, 2021· 10%· Abstract The authors analyze the influence of the semi-autogenous (SAG) mill parameters on the mill grinding efficiency, energy consumption and the tangential cumulative contact energy. This paper provides a new liner parameter design and optimization method, which offers theoretical guidance for the optimization design of liner parameters.

Simulation and Analysis of Wear on SAG Mill | Lu | DEStech ...

Wear of semi-autogenous grinding (SAG) mill is an important characteristic parameter in actual grinding process, the wear reduction of SAG mill is helpful to the life and efficiency of grinding. Discrete element method (DEM) with Hertz–Mindlin (no slip) model were used in this paper to simulate working process of the SAG mill, and the ...

A Method of C alculating Autogenous/ Semi-Autogenous ...

SAG mills mimic the same shortcoming. It follows that in order to obtain the specifi c energy (SE) to achieve a certain transfer size, based on the 80 per cent passing value, an ineffi ciency factor must be applied to the SE of single stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method.

Crushing in Mineral Processing

Dec 26, 2015· Since there are not that many small SAG mill operations of under 2000 TPD, and most sub-2000 TPD mills are built with rod mills and/or ball mills only; the upstream crusher plant needs to have sufficient crushing power to provide a P80 to grinding of typically <1.5″ (40 mm) and often as finely crushed as <3/8″ (9 mm).

Russell Egan - Process Coordinator Superintendent - Alcoa ...

Main focus was on the operation and performance of 3 SAG mills. Milling Process Engineer Alcoa Oct 2012 - Nov 2014 2 years 2 months. Wagerup Responsible for: - Provide technical advice for bauxite reclaiming, 3 SAG mills, and disilication ... Calcination Area Process Engineer - Set process parameters for five calciners, product filtration, and ...

INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV ...

Authors' final version of paper published in Minerals Engineering 22(12):1032-1044, Oct 2009 INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV: INFERENTIAL MODEL VALIDATION T. A. APELT*§ and N. F. THORNHILL§ § Centre for Process Systems Engineering, Imperial College SW7 2BY. Email: [email protected]

Cyanidation in Grinding Circuit: Evaluation of Leaching ...

Jan 01, 2016· Increasing Sag Mill Capacity at the Copper Mountain Mine thr Introduction to the Meliadine Project Magnetic Conditioning of Sphalerite at Red Dog Mine Operating Experience and Developments of G-Rex and Aurix100 Optimising Plant Feed Quality and Process Performance Using

(PDF) Maximising SAG mill throughput at Porgera gold mine ...

Modeling and Simulations two parallel primary grinding lines. Each line consists of a variable 4. Validation speed SAG mill measuring 28 feet in diameter by 11 ft long. The mill 5. Implementation motors are rated at 5,500 HP. At the discharge of each SAG mill is a pair of vibrating screens.

Automated SAG Mill Speed Control Using On-contact ...

Automated SAG Mill Speed Control Using On-contact Vibration Sensors ... The mineral extraction process design consists of primary metal recovery for gold and secondary ... with other typical control room process parameters. i.e. mill power and bearing pressure. 4.

SAG mills - Outotec

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 Outotec'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 ...

Increasing Productivity Without ... - Honeywell Process

2. SAG mill rules – evaluate the SAG mill and ball mills weights and power draws and adjust accordingly. 3. Ball mill rules – increase or decrease feeds based on weights and power draws. Effectively the rules base acts as an envelope around the model-based optimizer. It acts as a check on outputs before they are

SAG Mill Optimization using Model Predictive Control

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, M.S., van der Westhuizen, A.P., & Mainza, A.N. 2009).

What's the Difference Between SAG Mill and Ball Mill ...

Nov 26, 2019· The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill's ...