Nov 21, 2007018332Ball Mills and Sag Mill problem. A afshar Member. Hello all, I work in an industrial copper company as vibration analysis supervisor. This company started to work about 2 years ago. We have two Ball Mills and one Sag Mill. We had some visual inspection on pinion and ring gears, during these inspections we found some abnormal wear on this gears.
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In the past, when primary, secondary and tertiary crushers fed material directly to large ball mills, the energy efficiency of the concentrator was determined for the most part by the ball mill operation, whereas now the energy efficiency of a plant often rests largely on the SAG mill operation.
A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21. 6 7 The largest SAG mill is 42 12.8m in diameter, powered by a 28 MW 38,000 HP motor. 8 A SAG mill with a 44 13.4m diameter and a power of 35 MW 47,000 HP has been designed. 9.
Jun 01, 2005018332There are many other solutions however if the efficiency of a SAG mill is not what you are after all of the other options cost more in terms of maintenance and materials eg. pure ball mills, hammer mills and rod mills. AG and SAG mills are cheap to.
Axb values less than 30. A single SABC line was selected for the grinding circuit, with the SAG mill motor rated at 13.4 MW and two ball mills each powered by a 7 MW motor. The plant ramp-up period started in 2006 and in 2009 the design throughput was yet to be achieved. The.
We sell all types of Ball Mills, Pebble Mills, Rod Mills, SAG Mills, Grinding Mills, if you are looking for partial or complete replacement for all the ball mill parts Contact us right now Gold Canyon Office 1 480 983-0755. Mesa Office 1 928 200-3291. E-Mail.
Secondary mill feed Continuous regulation capability gate to allow controlled distribution of feed between the two ball mills. Finally, if the amount of critical sie material removed from the mill is less than the crusher and secondary mills capacities, those mills can also be fed with a small fraction of the SAG mill trommel undersie in.
SAG Mill Grinding Circuit Design. If the build-up of critical sied pebbles is too great 5090 mm slots are cut into the grate pebble ports to allow the scats to discharge from the mill. These scats are crushed before returning to the SAG mill or passing onto a ball mill in an autogenousball millcrusher ABC circuit Figures 9.3 and 9.6.
SAGBall Mill Optimiation KnowledgeScape. GrindingExpert isnt just about SAG mills. Our GrindingExpert solutions include ball mill strategies that achieve the target grind sie while maximiing throughput, or when the circuit is SAG mill limited, achieve the finest grind sie possible, thus increasing mineral liberation and recovery.
Larger ball and SAG mills, with higher installed power ratings relative to the mill diameter, offer higher efficiency and throughput, round-the-clock reliability and the opportunity to mine in remote areas. This makes low ore grades economical to grind.
single-stage SAG mills to the largest mill in the worldwith a 40-foot diameter and 28 MW of motor power. Ball mills Ball milling is the most common application for horiontal tumbling mills. Outotec offers a full range of ball mills to suit a wide variety of duties from a few hundred kW all the way up to 20 MW and beyond. Rod mills. Chat Now.
Depending on the mill sie the SAG mills draws between 2 MW and 17 MW. The product from the SAG mill is further reduced in sie using pebble crushers and ball mills. Hence, typical gold or copper ore requires between 2.0 and 7.5 kWh per ton of energy to reduce the particle sie.
In many grinding plants mills which have metallic or rubber liners suffer from bolt breakage. Our technicians come across broken mill bolts at many sites around the world, to the operators of the mills it is an almost normal occurrence, but if you have breaking bolts there is an underlying problem which needs to be fixed.
Sag And Ball Mill Drive Failures. Sag mill gear failure. sag and ball mill drive failures sag mill drives girth gears at 18,000 hp sag mill drives girth gears at 18,000 hp operation and performance this paper was originally presented at the vancouver sag mill conference in 1996.
Sag Mill Vibration Problems - ondawireless.ru. ball mill base designe Crushing Equipment for sale in South. foundations for the SAG and ball mills due to vibration problems Table 5.1 Summary of AGSAG mill... Get Price Here.
Mill grinding - Wikipedia. S mills are autogenous mills that also use grinding balls like a ball mill. A S mill is usually a primary or first stage grinder. S mills use a ball charge of 8 to 21. The largest S mill is 42 12.8m in diameter, powered by a 28 MW 38,000 HP motor.
SAG and ball mills have grown in sie and there are now many operational mills in the range of 2840 feet in diameter with installed powers ranging between 820 MW. The very high capacity of these mills and the common use of variable speed drives often result in operational problems. These problems are associated with high-energy.
SAG Mill Discharge. Controlling the feed and discharge of a mill is mostly a stabilisation exercise you need to be able to quickly and accurately control the mill feed rate. If the mill feed setpoint is changed, then the actual feed rate needs to stabilise at the new target in a short period of time. The feed rate setpoint can then be tied.
on SAG Mill Lube Oil Return Lines Crushing systems such as SAG Mills, AG Mills, Ball Mills, Gyratory and Cone Crushers are extensively used throughout the hard rock mining industry. In these systems, Labyrinth seal related problems leading to water ingression are intermittent and are therefore hard to detect. A large Australian gold mine was.
To avoid the problems encountered with operations involving AGSAG and conventional ball mills, RoM ball mills have been introduced in some of the South African platinum operations.
Difference Between Sag Mill vs Ball Mill - mech4study. Oct 12, 2017 SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilie 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.
Difference Between Sag Mill vs Ball Mill mech4study. Oct 12, 2017018332SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilie the balls in making the large fragments of materials broken into pieces.
The SAG mill at the site grinds the gold ore which is then sent to the autoclave for further processing. The impact of steel balls against ore particles is an efficient grinding method, but it can also wear the liner that protects the cylinder.
Sep 03, 2014018332Strain gauging of shell-mounted mills has been undertaken in the past. Some results have been published in SAG mill conferences. Strain gauges were also used to check the design of the CMDIC shell-mounted ball mills. The statement in 1 that shell mounted mills have not been thoroughly tested is incorrect. CONCLUSION.
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