There is currently no accepted pilot test procedure for measuring discharge and product size distributions in AG/SAG mills. The existing models and understanding of grate discharge and classifiion are known to be flawed and have been identified as one of the key limitations in AG/SAG modelling. The aim of this thesis is to improve on the current understanding of .

FullerTraylor SAG/AG Mills range in size from through in diameter with powers as high as 28,000 kW. Our team of product engineers continually improves SAG/AG Mill designs in order to provide the most robust, safe, and efficient grinding mills available.

 · Grinding mills often pulverize hard ores and as a result, is subject to large forces that affect its wear, life, and safety. The grinding circuits often consists of sag (semiautogenous grinding) mills, ball mills, pebble crushers, screens and hydro cyclones to produce the desired particle size .

A Bond ball mill work index is then performed on the mill product for the design of SAGball mill circuits. This is important because it was found that there was a 1– kWh/t higher ball mill work index if the – mm ball mill test feed size is obtained by SAG mill grinding compared with crushing.

The effect of liner wear on SAG mill performance has gained much attention in recent years. It is commonly observed that the three key performance criteria of SAG milling; throughput, power and product size all improve as the liner wears. The increase in throughput is generally ascribed to the increase in the grate apertures and the increase in mill volume due to the wear of these .

AG/SAG mills are normally used to grind runoffmine 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 red=fastest, blue=slowest moving particles [image: (13564)] The mill product can either be finished size ready for processing, or an intermediate size ready for final ...

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 . Get price; Optimising your SAG mill ...

SAG mill. SAG is an acronym for semiautogenous 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' () in diameter, powered by a 28 MW (38,000 HP) motor.

AG milling extends itself to many appliions due to the range of mill sizes available. AG 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 done by a ball mill. AG mills are also an optimum solution for wet grinding since crushing and screening in these cases can be difficult, if not impossible. Lower ...

There is currently no accepted pilot test procedure for measuring discharge and product size distributions in AG/SAG mills. The existing models and understanding of grate discharge and classifiion are known to be flawed and have been identified as one of the key limitations in AG/SAG modelling. The aim of this thesis is to improve on the current understanding of discharge in the SAG.

 · Grinding mills often pulverize hard ores and as a result, is subject to large forces that affect its wear, life, and safety. The grinding circuits often consists of sag (semiautogenous grinding) mills, ball mills, pebble crushers, screens and hydro cyclones to produce the .

milled product exits through grates and pulp lifters at the ... towards largersized SAG mills with diameters of m (34 ft) and above, with the largest being m (40 ft) in diameter and drawing 20 to 22 MW (Jones, 2006). Mill liners provide the replaceable wearresistant surface within grinding mills; they also impart the grinding action to the mill charge, and at the discharge end ...

Control of SemiAutogenous Grinding(SAG) mill weight is an example of an important process that exhibits many of these aspects. Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell,, van der Westhuizen,, Mainza, 2009).

SAG mill discharge control is quite involved due to few interactive variables, such as mill discharge sump level, classifiion hydrocyclone variables (feed density, flow and pressure) and water feed rate to the sump. Model predictive control (MPC), which is a multiinput multioutput (MIMO) controller, is very suitable for this purpose. If a particle size analyser is installed it can be ...

Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 25 feet/7,62 m Ore processed: Copper Ore Drive Rating: SAG Mill 19,4 MW / 9,31 rpm Ball Mills 13,43 MW / 11,5 rpm Award of Contract: November 2000 Start of Operation: December 2002 ABB's scope of supply: Four complete Gearless Mill Drive Systems including: Wraparound Motors Cycloconverters Excitations .

Autogenous Grinding (SAG) mill in closed circuit with a hydrocyclone package. The gold extraction is done by leaching process using cyanidation method through a series of stirred tanks. In this research, an optimization study of Aghdarreh plant grinding circuit performance was done to lower the product particle size (P 80) from 70 Pm to approximately 40 Pm by maintaining .