### Application of Operating Work Indices in Autogenous

AG/SAG Wio AWio (kWh/t) 28.5 Ball Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWh/t 13.4 Bond Rod Mill Work Index RWi kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations 1 2 ABstrAct Optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have The ball mill is a tumbling mill that uses steel balls as the grinding media. The length of the cylindrical shell is usually 1–1.5 times the shell diameter ( Figure 8.11 ). The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20–40 water by weight.

### Ball Millsan overview ScienceDirect Topics

The ball mill is a tumbling mill that uses steel balls as the grinding media. The length of the cylindrical shell is usually 1–1.5 times the shell diameter ( Figure 8.11 ). The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20–40 water by weight. AG/SAG Wio AWio (kWh/t) 28.5 Ball Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWh/t 13.4 Bond Rod Mill Work Index RWi kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations 1 2 ABstrAct Optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have

### Mill Lubrication SystemLinkedIn SlideShare

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. comparison of hpgrball mill and hpgrstirred mill circuits to the existing ag/sag millball 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

### Model Amelunxen SGISAGMILLING

Amelunxen SGI Model. This is a model that estimates the specific energy consumption of a SAG or AG mill plus ball mill circuit using the equation by Amelunxen (2014) for E SAG and the classical Bond work index equation for E ball substituting CF ball in the place of the Rowland efficiency factors.. The model requires manual calibration factors for both equations (CF SAG and CF ball Amelunxen SGI Model. This is a model that estimates the specific energy consumption of a SAG or AG mill plus ball mill circuit using the equation by Amelunxen (2014) for E SAG and the classical Bond work index equation for E ball substituting CF ball in the place of the Rowland efficiency factors.. The model requires manual calibration factors for both equations (CF SAG and CF ball

### Canada Mining Innovation Council (CMIC) Comminution

Canada Mining Innovation Council (CMIC)Comminution Technology Appraisal Study Final ReportJune 24 2016 H-0001 Rev. 0 AG/SAG mill is inefficient in grinding particles of a certain size typically in the range of 25-55 mm i.e. pebbles. Therefore cone crushers are often used as pebble crushers and integrated into AG/SAG mill circuits to break the critical size particles that accumulate in the mill and to increase the performance of the primary grinding circuits.

### Ball Millsan overview ScienceDirect Topics

The ball mill is a tumbling mill that uses steel balls as the grinding media. The length of the cylindrical shell is usually 1–1.5 times the shell diameter ( Figure 8.11 ). The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20–40 water by weight. ABB s GMD is the most powerful mill drive system in the market to power semiautogenous (SAG) ball and autogenous (AG) mills This workhorse for grinding operations combines a robust service-friendly and fit for purpose design to provide highest throughput reliability

### Mill Lubrication SystemLinkedIn SlideShare

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. (SAG) mills. In order to optimize this section the skills to accurately model and understand its underlying mechanisms are required. The literature exposed a clear lack of previous research on the influence and performance of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from

### O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

the required SAG comminution of test ore material. Specific energy consumption (SEC) measured in kWh/t is a ratio of the mill drive power to the milling circuit output without regard to circulating load. At the constant size of the cycle feed and discharge SEC is a prime characteristic of material grindability in a certain ore pretreatment Grinding mill process design. Choosing an appropriate grinding circuit configuration depends on your ore characteristics and mine plan. Outotec has extensive knowledge of comminution technologies and processes to ensure we provide the optimal solution for your needs.

### Mill power draw modelsSAGMILLING

You must manually check the motor s tent diagram to confirm that the predicted power draw is actually within the motor s capability at the indicated speed. Liner and grate design. The design of mill liners and SAG mill discharge grates will have a large effect on how efficiently the mill operates and the circuit throughput. All models generally AG/SAG mill is inefficient in grinding particles of a certain size typically in the range of 25-55 mm i.e. pebbles. Therefore cone crushers are often used as pebble crushers and integrated into AG/SAG mill circuits to break the critical size particles that accumulate in the mill and to increase the performance of the primary grinding circuits.

### AMIT 135 Lesson 6 Grinding CircuitMining Mill Operator

SAG Mill Circuit ExampleGold Processing SAG mill circuit example for gold processing image () 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 Grinding mill process design. Choosing an appropriate grinding circuit configuration depends on your ore characteristics and mine plan. Outotec has extensive knowledge of comminution technologies and processes to ensure we provide the optimal solution for your needs.

### Optimization of mill performance by using

mill under steady state then cutting off all feed streams to the mill as it is being stopped. Sufficient time is required to obtain all the important measurements correctly during the crash stop. The mill filling should be measured at a minimum of 3 points along the mill. Excess of slurry could also be estimated. To get rid of pulp and rocks in Schematic illustration of a control strategy recently implemented on a large variable-speed SAG mill at MMG s Century Zinc operation in Australia. A control strategy recently implemented on a large variable-speed SAG mill at MMG s Century Zinc operation in Australia is shown in the chart (found on pg. 32).

### Canada Mining Innovation Council (CMIC) Comminution

Canada Mining Innovation Council (CMIC)Comminution Technology Appraisal Study Final ReportJune 24 2016 H-0001 Rev. 0 SAG mill control schematic responsive precise control is possible. BrainWave accounts for changes in mill rotation recycled pebbles and ore quality to maintain mill weight and maximize production. As the weight controller adjusts the set point

### AUTOMATION ADVANCED CONTROL SOLUTIONS FOR MINING

SAG mill control schematic responsive precise control is possible. BrainWave accounts for changes in mill rotation recycled pebbles and ore quality to maintain mill weight and maximize production. As the weight controller adjusts the set point However AG/SAG grinding circuits are quite sensitive to the mix of fine and coarse material in the mill feed. This paper explores the relation between fragmentation size and grinding circuit

### USB2Slurry return system for grinding mills

FIG. 2A is a perspective view and enlarged detail of the sand wheel seal segment of FIG. 2 attached to the trunnion end of a SAG mill FIG. 3. is a schematic side view of a slurry return system in a second preferred embodiment 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.

### Outotec Grinding MillsOutotec

Grinding mill process design. Choosing an appropriate grinding circuit configuration depends on your ore characteristics and mine plan. Outotec has extensive knowledge of comminution technologies and processes to ensure we provide the optimal solution for your needs. (SAG) mills. In order to optimize this section the skills to accurately model and understand its underlying mechanisms are required. The literature exposed a clear lack of previous research on the influence and performance of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from

### Ball Millsan overview ScienceDirect Topics

The ball mill is a tumbling mill that uses steel balls as the grinding media. The length of the cylindrical shell is usually 1–1.5 times the shell diameter ( Figure 8.11 ). The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20–40 water by weight. The SAG mill disch arges onto a trommel Fig. 11- JKSimMet Model Flow Diagram . Metallurgical Plant Design and Operating Strategies (MetPlant 2011) 14. 89 August 2011 Perth WA .

### Expert mill control at AngloGold Ashanti

The ROM SAG mill circuit—a brief description The typical ROM SAG mill circuit is depicted in Figure 1. The circuit is usually closed with either a screen or more commonly a cyclone for product size classification. The focus of control can be divided into two parts viz. the mill and the cyclone. The importance of cyclone performance should comparison of hpgrball mill and hpgrstirred mill circuits to the existing ag/sag millball 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

### Mill (grinding)Wikipedia

SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also 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. ABB s GMD is the most powerful mill drive system in the market to power semiautogenous (SAG) ball and autogenous (AG) mills This workhorse for grinding operations combines a robust service-friendly and fit for purpose design to provide highest throughput reliability