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Nov 21, 2014· Overflow verses grate discharge ball mills: an experimental investigation ... 6C183 UNUSED OUTOTEC '' x 24'' Ball Mill ... Overflow Discharge Ball Mill in Operation .
SAG and ball mills with grate discharge are not prone to locked charge events because of the high amount of rocks and balls compared to fine ore. The pulp dischargers of a SAG mill continually pump the finer material out of the mill, lowering the total amount of residual fine ore and thus improving the situation in respect to locked charge starts.
Outokumpu Technology''s new design, TPLTM is a result of these material transport problems. As the internal design of the TPLTM approximates a grate, peripheral discharge or a grate, openended discharge, it keeps the slurry/pebbles away from the grate once they enter the pulp lifter chamber, thus completely eliminating flowback and carryover problems.
discharge pump (grate and pulp lifters) is operating. Similar to the impeller design affecting the pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of the SAG/AG grinding mills. The general arrangement of AG/SAG mills discharge system is shown in Figure 1. BREAKAGE DISCHARGE
of overflowdischarge mills but not to the same extent in gratedischarge mills. This pool is situated more or less symmetrically with respect to the axis of the mill and therefore does not draw significant power. Austin recommends K = for overflow semiautogenous mills. A value of K = makes Austin''s formula agree with Morrell''s data
the primary crushed feed ore and operates in closed circuit with pebble crusher. SAG mill discharge passes through grates and screened by a trommel with the oversize being recycled by conveyor back to the SAG mill. Combined product from the SAG mill (trommel undersize) and the Ball mill discharges into a common mill discharge hopper.
Outotec® Grinding Mills. Optimize grinding mill performance, efficiency, and availability to ensure you meet your plant''s operational targets. Outotec highperformance grinding mills use advanced simulation tools for the best possible process efficiency, mechanical reliability, and maintainability.
Metallurgical ContentBall Charge Motion inside a SAG MillSAG Mill OperationSemi Autogenous Design FactorsSAG Mill Operation ExampleProcess Plant DescriptionSAG Mill Design and Specification Operating Problems Since CommissioningDesign Changes and Future Operating Strategies AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form the .
May 08, 2015· Pegging of the discharge grates in SAG mills often occurs and this will result in a drop in throughput. The effect of new grates can be simulated in terms of .
Gratedischarge Type The gratedischarge type of Ball Mill has a grate at the outlet of the shell and causes less excessive grinding, compared to the overflow type. Therefore, generally, it is best suited to grind materials up to the particle sizes ranging from 60 to 100 mesh. Compartment type
SAG Mill vs Ball Mill. Ball Motion inside a SAG Mill. ... A Morgardshammar overflow mill can be converted into a grate discharge mill only by changing some liner parts and without any change of the mill. Trunnion liners are rubber coated fabricated steel or cast steel. In grate discharge mills the center cone and the trunnion liner form one piece.
Aug 09, 2010· SAG mill to Conquest Mining (ASX: CQT) for a cash price of million. The purchase includes: • Outotec Grate Discharge SAG Mill with major spares: o main electric motor: o girth gear; o gearbox; o pinion and pinion bearings; and • Russell (RME) 7Axis Mill Relining Machine. All equipment is new, complete and in original packing.
discharge pump (grate and pulp lifters) operates. The essential function of a pulp lifter is to transport the broken material and slurry from the discharge grate out of the mill. Hence, the design optimisation of pulp lifters affects not only the energy efficiency and throughput of autogenous grinding/semiautogenous (AG/SAG) grinding
Metallurgical ContentTypes of Ball Mills Ball Mill GrindingExample of Plant Capacity GainsBall Mill SpecificationsCompare Type of Mill DischargeGrate Discharge Ball Mill CapacitiesGrate Discharge Ball Mill Arrangement Dimensions Allow me to compare: Ball mills can be of the overflow or of the grate discharge type. Overflow discharge mills are used when a product with high specific surface is ...
Jul 10, 2017· Outotec Mill Reline Machines – Designed for safety ... of this process is the operation of the mill reline machine. Outotec''s Mill Reline Machines (MRMs) set .
In simple words, grate discharge mills give higher tonnage, but produce coarser grinding, that may cause problem in your Flotation recovery, Grate discharge will also reduce your EGL. The best option would be to place a retainer ring at discharge end to hold more charge that will give you more throughputs without compromising grind size.
INTRODUCTION OF TURBOLIFTER SYSTEM AT KAROWE DIAMOND MINE ABSTRACT Boteti are due to begin treating the significantly more competent (Unit13) kimberlites at their ... system is anticipated to improve upon the difficulties experienced in the original mill grate/pan ... system to improve the discharge, and grate efficiency.
A x Outotec grate discharge ball mill with an installed power of and Turbo Pulp Lifters is operated in closed circuit with 250mm cyclones to provide a 45 m product to flotation. The primary mill was initially commissioned as an Autogenous Grinding (AG) mill.
The commercially viable and industry accepted alternate is a grate discharge trunnion supported mill or a grate discharge shell supported mill using pulp lifters. The only way to eliminate the problem of flowback and carryover of slurry and pebbles is by optimizing the design of the discharge arrangement.
lifter for sag mill Slurry flow in mills with TCPL ? An efficient pulp lifter for ag/sag mills lifter for sag mill,Extensive test work carried out on slurry removal mechanism in grate discharge mills (ag/sag) has shown that the conventional pulp lifters (radial and curved) have inherent drawbacks They allow shortcircuiting of the slurry from pulp flow in mills with TCPL An ...
Outotec® Grinding technologies With over 100 years experience in grinding technology, Outotec is one of the largest mill suppliers in the world. Outotec''s dedicated team of grinding specialists provide design engineering, testing and analysis in order to select the mill best suited to .
SLURRY POOLING AND TRANSPORT ISSUES IN SAG MILLS. mill (a laser range meter is ideal for this). The slurry level ... The discharge grate is designed to retain oversize material and balls in the mill.
Outotec® MH Series Grinding Mills offer a cost effective, and easy to operate and maintain grinding solution across the mill lifecycle. The MH Series includes a range of SAG, ball, and rod mills in standardized sizes with a capacity of up to MW installed power, and is based on over 100 years of experience with grinding technologies.
SAG MILL DISCHARGE SCREENSTROMMEL vs. VIBRATING Tony Moon, RTZ What I''d like to talk about is probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use vibrating screens or trommel screens? What many of you probably don''t realize is that at
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