SABC Grinding Circuit Operation & Optimization

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

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Table of ContentsSABC Test ProceduresSABC Test ResultsStages 1 & 2 Cut Discharge GratesStage 3 Cast Pebble Ported GratesBall Mill CapacityScat Discard OptionSABC Circuit OperationSemi Autogenous Ball Mill Crushing Circuit SABCMills RationalizationPilot Plant StudiesConstruction and Start Up Brief Geology in Relation to Work Index Variation To understand the need for a SABC Grinding

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grinding, to single stage crushing and semi-autogenous grinding (SAG) and ball mill (SAB) circuits. This progression has, not necessarily, been accompanied by an improvement in the efficiency of power utilisation in achieving the target grind size, but has seen an improvement in the overall efficiency of mineral processing as

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

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AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND

than a single line SAB or SABC operation. Therefore if the ore is not overly grind sensitive, and the application is suited to a single mill scenario, SSS appears appropriate. If grind sensitivity is an issue or the capacity is too high for a single SAG mill, a two stage grinding

Model:Raw Bond/Barratt SAB & SABC Model

Raw Bond Model. This is a SAG or AG mill plus ball mill model that estimates the specific energy consumption (E SAG) using the 1979 Barratt equation and the classical Bond work index equation including Rowland efficiency factors.The model allows a manual calibration factor on both equations (CF SAG and CF ball, respectively).This formula usually gives higher total circuit

Page 1 Page 2 INTRODUCTION SAG Metallurgy OMC

compared to the reduced requirement of a two stage grinding circuit (SAB/SABC) with singular feed system. Depending on the ore characteristics and the target grind, the constraint is likely to limit the capacity of a single train with a pinion driven mill to ranges of 4 8 Mtpa. Similarly, rod mills are limited to around 1600 kW in size because of the maximum size of quality steel rods

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Join us in Vancouver from September 22 to 26, 2019 at the premier global event for Semi-autogenous and High Pressure Grinding Technology. The SAG Conference event brings together all those engaged in the field of autogenous, semi-autogenous and HPGR grinding in the industrial and metalliferous mineral industries. SAG 2019 conference theme (R)EVOLUTION reflects incremental and step

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COMPARISON OF HPGR BALL MILL AND HPGR STIRRED MILL

grinding rolls (HPGR) and high speed stirred mill, have been developed and adopted in the hard-rock mining operation in order to reduce the energy consumption and improve the process performance. The combination of HPGR and stirred mill in a single flowsheet without tumbling mills has been demonstrated to be technically feasible. This research focused on the energy and cost comparisons of the

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Operational data from 4 grinding circuits corresponding to 3 Chilean copper concentration plants are used and the SABC A/B milling circuit. Scw = solid concentration by weight fraction in the SAG mill feed; Jb = balls charge (bulk fraction of the SAG mill volume); N/Nc = fraction of the SAG mill critical speed; Pc = SAG mill power consumption (kW); % 600 +100 = % of the fresh feed in the

Optimizing Performance of SABC Comminution Circuit of the

with a standard SABC comminution circuit (Figure1), and was the first to use the largest domestic F8.8 4.8 m SAG mill (‘diameter’ represents nominal diameter, and ‘length’ of the mill represents the effective grinding length inside the end liners and discharge grates), F6.2 9.5 m overflow ball mill

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Grinding circuit practices at Newmont CEEC (Coalition,SAG/ball (SAB) configurations represent the dominant comminution flow sheet within the company and the circuit configurations employed include SAB, SABC-A, SABC-B and single-stage (SS) SAG milling, with SAG mill feed ranging from run-of-mine (ROM) ore through to secondary crusher product

A REVIEW OF SAG CIRCUITS CLOSED WITH HYDROCYCLONES

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Model:Bond/Barratt SABC Models SAGMILLING.COM

The rule of thumb is apply the CF value of 0.15 for SAB circuits (5% higher overall specific energy consumption) Bennett, Dobby & Kosick, SAG 2001. Published data from Cadia confirms a 5% difference in throughput (and therefore, specific energy) when the pebble crusher is fully utilized. Hart, Valery, Clements, Reed, Song & Dunne, SAG 2001.

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Grinding Circuit Modelling Documentation. This documentation describes the operating and underlying mathematics of the SAGMILLING.COM grinding circuit modelling program. It is intended to be used by the model users who want to operate and understand the functioning of grinding models.

Grinding circuit practices at Newmont CEEC (Coalition

SAG/ball (SAB) configurations represent the dominant comminution flow sheet within the company and the circuit configurations employed include SAB, SABC-A, SABC-B and single-stage (SS) SAG milling, with SAG mill feed ranging from run-of-mine (ROM) ore through to secondary crusher product. The collective experiences earned from designing, operating and debottlenecking these various

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Autogenous and Semiautogenous mills liming. And the product of the large AG/SAG grinding is either a finished size ready of processing, or an immediate size for further grinding