sag mill and a closed circuit ball mill - Performance of direct and reverse Samarco grinding circuits The former is equipped with a reverse-configured ball mill closed grinding circuit, while the latter is equipped with ball mills under a direct closed .

The behavior of the SAG mill circuit is multivariable ie exhibit complex interactions and non-linear behavior between the process variabl It is also dynamic ie delay times between variables within the process need to be considered before control actions are executed

1 Optimization and Control of a Primary SAG Mill Using Real-time Grind Measurement CW Steyn*, K Keet**, W Breytenbach*** *Control Engineer, Anglo American Platinum, Control and Instrumentation Department, Johannesburg.

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321 Primary FAG/SAG Mill Circuit Ore is withdrawn from the conical stockpile via 2 of 4 apron feeders and delivered to the primary mill feed conveyor A semi-automatic ball loading system is available to load steel balls onto the mill feed conveyor

Figure 2 – Single-stage SAG Mill Grinding Circuit Flowsheet The circuit feedrate of 125 tph to 150 tph was primary crushed to an F80 size of between 105 mm and 120 mm and the SAG mill slowed down and charged with a 7% (by volume, v/v) load of 125 mm balls

pass through SAG mill onto ball mill circuits , “The Cadia HPGR-SAG circuit – from design to operation – the commissioning challenge”, Engelhardt et al, SAG 2015 Conference Cadia East open pit vs preconditioned cave fragmentation Pebble generation evidence of grindability issues

The results showed that the HPGR-ball mill circuit achieved a 21% reduction in energy consumption over the existing SAG-ball mill circuit at the same P80 grind size of 160 mircons (μm) At a grind of 80% passing 75 μm, the HPGR-stirred mill circuit showed a 34% reduction in ,

At SAG 2001, Doug Farnell and Stephen Thompson, both principals in Farnell-Thompson Applied Technologies, Montreal, Canada, presented a paper titled Coordination of Mill, Motor and Plant Engineering for Large Gearless Mill Projects

An Expert System for Control of a Sag/Ball Mill Circuit , e) AG/SAG Mill Theory - Text and graphics explaining grinding definitions, the fundamentals of AG and SAG mills, mill control strategies, techniques for handling problems with overviscous pulps and effects of variation of mill speed, ball load and total mill charge on throughput and .

Autogenous and Semi-Autogenous Mills The optimum solution for wet grinding , involves continuous milling in a 6 ft x 2 ft AG/SAG mill Up to 50 ton samples are required for each ore type to be tested The results of , Grinding circuit design AG/SAG milling can ,

321 Primary FAG/SAG Mill Circuit Ore is withdrawn from the conical stockpile via 2 of 4 apron feeders and delivered to the primary mill feed conveyor A semi-automatic ball loading system is available to load steel balls onto the mill feed conveyor The fresh feed ore size detection is ,

home sag circuit mill sag circuit mill Autogenous and Semiautogenous mills - Autogenous and Semiautogenous mills The AG/SAG mills are utilized to grind run-of-mine rock or primary crusher discharge [More info] Sabodala Gold Project - Mining Technology

The first group is dedicated to SAG mill circuit, comprising stockpile feeders, SAG mill feed belt conveyor and SAG mill itself The second group is for cyclone circuit comprising cyclone feed sump, sump (cyclone feed box), pumps and cyclones themselv

The effects on mill performance of a varying ratio of these two components in the mill feed are not well described by the current generation of AG/SAG models (Stange, 1996)

SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rat Typical tests required to define a hardness variability function, are given below in Figure 1

SAG Mill Operation at Cortez: Evolution of Liner Design from Current to Future Operations Julius Stieger1, Process Superintendent Dave Plummer2, Process Maintenance Planner , Mill #1 was a conventional rod mill/ball mill circuit followed by an 8-stage CIP circuit

SINGLE STAGE SAG/AG MILLING DESIGN ABSTRACT Single stage semi-autogenous / autogenous (S/AG) milling has become a common design for a variety of ore , a single stage S/AG mill circuit 1) Characterisation of the ore using bench tests 2) Determining if the use of a single stage circuit is appropriate, using defined selection criteria

Following a successful commissioning and start-up, we believe that two grinding lines at Las Bambas, Perú, each consisting of one SAG Mill and one Ball Mill (this mill combination is uniquely specific to Las Bambas ore types), are operating at design throughput of close to 140,000 tpd and within the range predicted by DJB from a managed multi-sample geometallurgical testing program (ie, no .

Jan 08, 2016· In this training module, we'll cover the workings of a semi-autogenous grinding mill, or SAG mill, that's designed to be the first stage of a grinding circuit

The discharge grates of the SAG mill were identified as a key component in the SABC circuit, and their design is a crucial factor in the mill's performance [17][18][19] [20] [21] The initial .

What Can Go Wrong in Comminution Circuit Design? C Bailey1, G Lane2, S Morrell3 and P Staples4 ABSTRACT The design of semi-autogenous grinding (SAG) mill based comminution circuits for the treatment of competent ores, similar to those at Geita and

Mill filling is an important operational parameter in a SAG mill circuit and by its control and optimisation it can produce significant improvements in production capacity and energy efficiency However, it is industry practice to report mill load as the total output given by ,

Gearless mill drive (GMD) technology has further expanded the use of large AG/SAG milling allowing to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW Today, is the world leading supplier of gearless AG/SAG mills operating globally

ECS/ProcessExpert improves the mill circuit grinding efficiency which in turn results in improved energy consumption and throughput Improved circuit operation together with the increased equipment protection converts to less plant downtime, all of which enhances plant profitability

COMMINUTION SERVICES GRINDING CIRCUIT DESIGN, OPTIMIZATION AND PRODUCTION FORECASTING INTRODUCTION In most processing plants, the grinding circuit represents the largest capital investment With the emergence of low grade – high tonnage operations, this , scale SAG mill,

To verify this hypothesis, a dynamic model of a SAG mill-pebble crusher circuit was implemented The dynamic unit models are based on results presented by several different researchers, whose results here have been combined and implemented in Matlab/Simulink

ball mill circuit design criteria - acbgudi-eduin the mill High energy requirements for both the SAG mill and the ball mill were This paper deals with the grinding testwork, and the grinding circuit design and , Sag and Ball Mill Circuit Layout and Design Authors: L Dufour, K McVey, S Perkins, L Rolandi and E Young SAG 2011 .

limitations are the single stage AG/SAG mill circuit and the rod mill circuit However, all circuit types eventually reach a maximum single Page 3 train capacity and if this is close to the proposed circuit capacity, it may dictate the selection of the plant capacity

SAG/Ball Mill Optimization , or when the circuit is SAG mill limited, achieve the finest grind size possible, thus increasing mineral liberation and recovery GrindingExpert™ has been shown to typically increase throughput by 3-6%