### AG - Autogenous SAG Semi-Autogenous Mill Design

Table of ContentsSAG Mill ChargeSAG Mill Horsepower — Drive PowerOre Testing for AG SAG Grinding Mill Design Mill Sizing: After laboratory and pilot plant testing confirm the feasibility of autogenous or semi-autogenous grinding, it can be used to establish the exact grinding circuit and mill size

More### INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS V: MPC ...

The Inferential measurement models of the SAG mill inventories, feed rate and sizing and mill discharge rate and sizing requires are determined in the following six-step sequence: 1. Oversize crusher feed, primary cyclone feed, SAG mill discharge, including the transfer sizes ( T 80. . . T 20); 2. SAG mill rock charge; 3. SAG mill fractional total filling, J t, fractional ball filling, J b ...

More### INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV ...

rate [t/hr], smdc is the SAG mill discharge size distribution [%retained w/w], MV DC_H2O is the SAG mill discharge water addition rate measured variable 3[m3/hr] and SG l is the process water specific gravity [t/m ]. Step 2: SAG Mill Rock Charge The SAG mill rock charge properties (SMRC) and size distribution (smrc) are estimated by the reverse-application of the SAG mill grate discharge ...

More### C O N S U L T I N G L T D TECHNICAL MEMORANDUM

The value T80 is the “synthetic” transfer size between the SAG mill and ball mill – a fines-corrected 80% passing size2 of the SAG mill product (or the combined SAG mill product and crushed pebbles if the circuit is sending crushed pebbles to the ball mill circuit, a.k.a. SABC-B operation). The EF4RM for rod milling is used, calculated using Equation 7. 1 D.J. Barratt. An Update On ...

More### size on crusher and sag mill - kiran-foundation

(PDF) Influence of feed size on AG / SAG mill performance. get more. What Are the Best Sizes of Crusher Run Gravel for Driveway. get more. INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV. get more. Dynamic Modeling and Simulation of SAG Mill Circuits with. get more . sag mill feed size e grinding mill Nigeria. get more (PDF) FULL PRE-CRUSH TO SAG MILLS THE CASE FOR . get more. Sag Mill

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

AG/SAG is short for autogenous mill and semi-autogenous mill, it combines with two functions of crushing and grinding, uses the ground material itself as the grinding media, through the mutual impact and grinding action to gradually reduce the material size. SAG mill is usually used to grind large pieces into small pieces, especially for the ...

More### Optimizing your SAG mill operation - International Mining

21/03/2007 It is imperative to ensure the efficient removal of both slurry and coarse pebbles (critical size) in order to ensure the efficient operation of AG/SAG mills. Elimination of the above mentioned material transport problems will allow the mill to respond truly in terms of power draw for changes in mill load which depends on feed ore characteristics.

More### INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS V:

The Inferential measurement models of the SAG mill inventories, feed rate and sizing and mill discharge rate and sizing requires are determined in the following six-step sequence: 1. Oversize crusher feed, primary cyclone feed, SAG mill discharge, including the transfer sizes ( T 80. . . T 20); 2. SAG mill rock charge; 3. SAG mill fractional total filling, J t, fractional ball filling, J b ...

More### INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV ...

rate [t/hr], smdc is the SAG mill discharge size distribution [%retained w/w], MV DC_H2O is the SAG mill discharge water addition rate measured variable 3[m3/hr] and SG l is the process water specific gravity [t/m ]. Step 2: SAG Mill Rock Charge The SAG mill rock charge properties (SMRC) and size distribution (smrc) are estimated by the reverse-application of the SAG mill grate discharge ...

More### C O N S U L T I N G L T D TECHNICAL MEMORANDUM

The value T80 is the “synthetic” transfer size between the SAG mill and ball mill – a fines-corrected 80% passing size2 of the SAG mill product (or the combined SAG mill product and crushed pebbles if the circuit is sending crushed pebbles to the ball mill circuit, a.k.a. SABC-B operation). The EF4RM for rod milling is used, calculated using Equation 7. 1 D.J. Barratt. An Update On ...

More### THE APPROPRIATENESS OF THE TRANSFER SIZE IN AG AND SAG ...

THE APPROPRIATENESS OF THE TRANSFER SIZE IN AG AND SAG MILL CIRCUIT DESIGN ABSTRACT The AG/SAG circuit discharge P80 is now increasingly referred to as the “Transfer Size” or T80 for short. From the literature it is apparent that in circuit design some approaches to the sizing of AG/SAG mills as well as the ball mills that they feed use this parameter. This paper reviews whether

More### Modelling: Transfer size limits - SAGMILLING.COM

The transfer size, T 80, is the characteristic size of the stream between the primary (SAG) and second (ball mill) stages of grinding.It is an important tuning factor for making the circuit work effectively.

More### size on crusher and sag mill - kiran-foundation

(PDF) Influence of feed size on AG / SAG mill performance. get more. What Are the Best Sizes of Crusher Run Gravel for Driveway. get more. INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV. get more. Dynamic Modeling and Simulation of SAG Mill Circuits with. get more . sag mill feed size e grinding mill Nigeria. get more (PDF) FULL PRE-CRUSH TO SAG MILLS THE CASE FOR . get more. Sag Mill

More### Optimization of the Design of SAG Mill Internals Using ...

The selection of an optimum top ball size for a large SAG mill is determined by several factors: wear rate, particle breakage effectiveness and liner damage. This example shows how 3D DEM can be used to provide quantitative input on each of these factors. In this case the performance of three different top ball sizes (125, 150 and 175 mm) are evaluated in an otherwise constant environment of ...

More### SAGMILLING.COM .:. Articles

Memorandum describing the SAG mill ball mill circuit sizing lecture delivered to the University of Brit ish C... [↓ read more ↓] Alex Doll: modelling: Liner Effective Height [] Determines the effective mill inside diameter of a given set of "top hat" lifters for use in mill vo lume and c... [↓ read more ↓] Alex Doll: modelling: Liner Effective Height [] Determines the effective mill ...

More### ARE SAG MILLS LOSING MARKET CONFIDENCE?

applied to the pilot plant data when selecting the SAG mill shell and motor size. Upon resolution of issues related to the mill motor and lifter design, the project only just managed to achieve the target throughput of 17 Mt/y (Figure 1). The contributing factors to higher than expected SAG mill specific energy (lower throughput) were: the low pebble recycle rate in the plant (an average of 24 ...

More### SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING

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 Kennecott’s Copperton concentrator, which we started up ...

More### Modelling: Transfer size limits - SAGMILLING.COM

The transfer size, T 80, is the characteristic size of the stream between the primary (SAG) and second (ball mill) stages of grinding.It is an important tuning factor for making the circuit work effectively.

More### THE APPROPRIATENESS OF THE TRANSFER SIZE IN AG AND SAG ...

THE APPROPRIATENESS OF THE TRANSFER SIZE IN AG AND SAG MILL CIRCUIT DESIGN ABSTRACT The AG/SAG circuit discharge P80 is now increasingly referred to as the “Transfer Size” or T80 for short. From the literature it is apparent that in circuit design some approaches to the sizing of AG/SAG mills as well as the ball mills that they feed use this parameter. This paper reviews whether

More### SAGMILLING.COM .:. Articles

Memorandum describing the SAG mill ball mill circuit sizing lecture delivered to the University of Brit ish C... [↓ read more ↓] Alex Doll: modelling: Liner Effective Height [] Determines the effective mill inside diameter of a given set of "top hat" lifters for use in mill vo lume and c... [↓ read more ↓] Alex Doll: modelling: Liner Effective Height [] Determines the effective mill ...

More### What is the difference between a SAG mill and ball mill?

A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. [6] [7] The largest SAG mill is 42′ (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor. [8] A SAG mill with a 44′ (13.4m) diameter and a power of 35 MW (47,000 HP) has been designed. [9]

More### Optimizing your SAG mill operation - International Mining

It is imperative to ensure the efficient removal of both slurry and coarse pebbles (critical size) in order to ensure the efficient operation of AG/SAG mills. Elimination of the above mentioned material transport problems will allow the mill to respond truly in terms of power draw for changes in mill load which depends on feed ore characteristics.

More### Sag Mill and Ratio Of Bond Ball and Rod Work Index

The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. 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.

More### The appropriateness of the transfer size in AG and SAG ...

In his approach the total specific energy of the entire AG/SAG circuit is firstly predicted using the SAG mill feed F80 and the ball mill cyclone overflow P80. Morrell's model (Morrell, 2011 ...

More### Mill sizing method

Please find below two calculators for sizing mills using the Bond and Rowland methods: Ball mill sizing: Calculator for ball mill(s) in a single stage circuit. Rod ball mill sizing: Calculator for rod mill(s) as first stage of the circuit and ball mill(s) as second stage of the circuit.

More### SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING

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 Kennecott’s Copperton concentrator, which we started up ...

More### grind size for sag mill - seniorenbeirat-huerth.de

grind size for sag mill. Gearless mill drive GMD technology has further expanded the use of large SAG milling allowing Metso to produce the worlds largest SAG mill of 42’ in diameter drawing power at 28 MW Today Metso is the world leading supplier of gearless SAG mills operating globally...We are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone ...

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