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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.
Grate discharge ball mill – OneMine Mining and Minerals TITLE: The Use of Mathematical Models of Grinding and Classification to Optimize Grinding Circuits at the Mt. Lyell Copper Concentrator, Tasmania. Online Chat Effect Of Grate Discharge Area Of Sag Mill . Effect of grate discharge area of sag mill.
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
of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from literature lacks knowledge of mill content size distribution and its effect on discharge through the grate at various aperture sizes and radial positions. It also indicates that in
Jan 08, 2016· In this training module, we''ll cover the workings of a semiautogenous grinding mill, or SAG mill, that''s designed to be the first stage of a grinding circuit. Ore that''s crushed in a primary ...
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.
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 .
To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered.
Mar 03, 2016· ROCKY 3D DEM simulations of grinding media flow can be used to investigate the relative performance of comminution devices.
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
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.
How a Grate Discharge Ball Mill Works. A grate assembly at the discharge en d of the mill permits retention of a higher ball charge (up to 50%) than is possible in an overflow mill which has a practical limit of around 40%. Behind the grates is a lifting compartment which .
without trommel screens. SAG and AG mills with openended discharge arrangements are usually more efficient than those with grate discharge arrangements. Trommels Outotec''s range of proprietary trommels has been designed using CFD flow control measures in order to optimize the usage of the available space. Outotec® Spiral Turbo Pulp Lifter ...
Overflow VS Grate Discharge Ball or Mill Why Retrofit. 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.
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
Improved Relationships for Discharge in SAG/AG Mills. 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 literature lacks knowledge of mill content size distribution and its effect on discharge through the grate .
Overflow Versus Grate Discharge Ball Mills: An Experimental Investigation It has been widely accepted to go for grate discharge ball milling when a coarse product is preferred or to avoid production of extreme fines, but overflow discharge mills are preferred for their simplicity of .
Overflow discharge mill, diaphragm or grate discharge mill and centre characteristics of the grinding media mass, density, ball size distribution standard sieves are used to determine quantitatively the size of the particles in eachet price great site to support engineers and technicians working every day cement ball mill.
Discharge arrangement Outotec provides a wide variety of discharge arrangements, such as overflow, peripheral, grate and openended. SAG and AG mills typically have grate discharge arrangements which can be either with or without trommel screens. SAG and AG mills with openended discharge arrangements are usually more efficient than grate ...
ball mill grade discharge design Ball Mill Grade Discharge Design estadoin, Grate Discharge Ball Mills Grates can be added to the discharge end of the ball mill to facilitate a steeper pulp How a Grate Discharge Ball Mill Works Here I try to explain how ground slurry is discharged from a grate ball mill How a Grate Discharge ...
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.
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.
stage of grinding. 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. During
Grate Discharge Sag Mill. ball mill discharge screenow to calculate the ball mill discharge size distributionand the ball mill discharge combine, in grate discharge type ball mill, a grate is provided at the discharge end of shellthe sag mill discharge is screened on a rotating trommel screenall load, mill speed, trommel screen aperture, pebble.
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