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 mill/ball mill circuit. A diagram of types of AG/SAG ...
SAG is an acronym for Semi-Autogenous Grinding. SAG mills are autogenous mills but use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.
Choosing the Right Motors for your Mills Alex Doll and Derek Barratt DJB Consultants, Inc., Canada. ... •SAG mill, use a Tent Diagram to identify the design requirements •Example, SG=4.0 ... effective for SAG mills –Variable speed for ball mills depends on the particular project and ore.
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. Ore that's crushed in a primary ...
Jan 13, 2014· Parts of SAG Mill to be lubricated: Trunion Bearing (feed end) Motor Bearings Gearbox Pinion Bearings Fig.1 : SAG mill Diagram Trunion Bearing (dis. end) 7. Lubricant Data: Masbate Gold Project's SAG mill uses Compounded Gear Oil as their main lubricant. But a different class of Gear oil is use in every operating system of the SAG mill.
Mill Power Draw Models. The mill power draw models are used to predict how much power will be consumed by a particular type of mill, mill geometry and set of mill operating conditions. This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models.
The proposed multi-component AG/SAG mill model is similar to, and based on, the current JKSimMet model. In the new version, the behaviour of each component is described using a separate perfect mixing model equation (see Fig. 5). The major features of this model are listed below: • More accurate calculation of specific comminution energy (Ecs
At the Lihir Gold Mine, the plant was utilizing mill's bearing pressure to calculate load measurement for the SAG mill in HGO1. The use of SAG mill weight for process control is additionally complicated at Lihir by compromised and suddenly drifting load cell and bearing pressure measurements on two of the process plant's three SAG mills.
The operating principle of the ball mill consists of following steps. In a continuously operating ball mill, feed material fed through the central hole one of the caps into the drum and moves therealong, being exposed by grinding media. The material grinding occurs during impact falling grinding balls and abrasion the particles between the balls.
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Nov 18, 2012· SAG MILL diagram – OneMine Mining and Minerals Library …. Internal parts, inlet and outlet, grading The SAG mill's replaceable liners are … 2mm +20mm -2mm -150mm +150mm F IG 1 – SAG mill block flow diagram.OREPASS … »More detailed
Mill Power Draw Model Bibliography. Mill power draw models are used to predict the usable power draw that a particular mill will generate. The three SAG mill models are benchmarked and reviewed in: Doll, A.G., A comparison of SAG mill power models, Procemin 2013; Austin SAG Model. The Austin SAG model was published in: Austin, L.G.
autogenous (SAG) Mill via an utilized method. Miduk SAG Mill circuit is shown in Figure 1. Figure 1: Diagram of Miduk Copper Complex SAG Mill Methods The following methods were utilized in this research work for ball filling calculation. To fulfill this aim, three approaches were investigated. - Surface load photograph,
Every mining operation has a unique grinding process. has experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of your mill.
Estimated Water Requirements for the Conventional Flotation of Copper Ores . By Donald I. Bleiwas . ... Estimated Water Requirements for the Conventional Flotation of Copper Ores . By Donald I. Bleiwas . ... (SAG) mill or ball mill where the ore is further reduced in size. Water is added to the ball mill, in which a slurry that usually contains ...
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 (i.e., no ...
A generic flow diagram of the MMZ milling circuit is indicated in Figure 2 below: Figure 2 - Nkomati 375ktpm MMZ Comminution Circuit A single 34ft x 17.3ft, grate discharge FAG mill with 2 x 5.2MW installed power is ... (SAG analyser). The mill is equipped with 70mm pebble ports and discharges onto a 30mm trommel screen. The +30mm trommel ...
The diagram shows the BrainWave user interface from the Los Pelambres installa - tion. In the trender area on the right side, the mill weight can be seen as a green line (PV) while the set point can be seen as cyan. The ... BrainWave: Control solutions for SAG mills ...
Advanced Controller for Grinding Mills: Results from a Ball Mill Circuit in a Copper Concentrator Anoop Mathur, Sujit Gaikwad, ... (SAG) mills. Given this large operational ... Block diagram of Total PlantTM SmartGrind multivariable predictive controller
A ball mill is a type of grinder used to grind, blend and sometimes for mixing of materials for use in mineral dressing processes, paints, pyrotechnics, ceramics and selective laser sintering. It works on the principle of impact and attrition: size reduction is done by impact as …
1. SAG Mill overload due to an increase on the ore coarseness, 2. Low Stock-Pile level and its effects on the plant, 3. Constrained operation, with low water network pressure, 4. Secondary grinding. Constrained operation with sudden pump malfunction events and low water availability, 5. Operation optimization of the integrated circuit
A simplified process flow diagram of the Bayer process used at the Wagerup refinery is presented in Figure 6. 4.1.1 Bauxite Grinding and Slurry Storage Bauxite is ground to less than 1.5 mm particle size at the refinery, using semi-autogenous grinding mills (SAG and/or Ball mills) to ensure sufficient solid-liquid contact during the
C is the mill rotational speed, fraction of critical speed (eg. 0.72 for 72%) D is the mill nominal diameter inside the shell, m d is the mill liner nominal thickness, m Figure 4: „Tent" diagram for the Cadia SAG mill described in Figure 3
The SAG mill is a large revolving cylinder. Rock is ground by the turning action of the mill, and impact from the hardened steel balls and the rock itself. In order to ensure that the rock is ground finely enough the SAG mill has a trommel screen (5), which acts like a large sieve.
Figure 1: Ring Motor of the 38' SAG-Mill of Rio Paracatú Mineraçao; Brazil 3 Design Verification To assure reliability of operation the mechanical design ... behavior of large Ring Motors for grinding mills 7 4.3.3 Campbell Diagram A Campbell Diagram shows a good comparison of opera-tion frequency and natural frequencies. The diagram in fig-
Oct 12, 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.