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Improved Relationships for Discharge in SAG/AG Mills

(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


Optimization of mill performance by using - SciELO

interaction by looking on the pulp position angle and media angle. The Sensomag has been developed to continuously measure both ball load and pulp slurry positions inside a running mill. The main data are provided in terms of toe and shoulder angles. (Figure 6.) The pulp density is an important parameter which influences the grinding efficiency.


THE INFLUENCE OF SHELL, GRATE AND PULP LIFTERS ON …

The charge motion and breakage of particles inside the mill depends on the shell lifters design, while the discharge of ground particles is controlled by the grate and pulp lifters. The limitations imposed by poor grate and pulp lifter design become increasingly apparent with increasing size of ag/sag mills and their operation in closed circuit.


Spiral Turbo Pulp Lifter - Outotec

A pulp lifter is used in grate discharge mills is to pump the ground ore from the mill. An inefficient pulp lifter can cause a slurry pool to build up in the mill, resulting in partial dissipation of charge (balls and rock) kinetic energy into the fluid, …


Comminution – Grinding Pulp Lifters | Ore 2 Metal

Dr. Sanjeeva Latchireddi is the Managing Director of EEMS with over 25 years of experience. Sanjeeva is one of the world's top comminution experts and an inventor of a novel pulp lifter with many commercial applications across global milling operations, achieving significant improvements in mill throughput and energy savings.


The Development and Installation of the Twin Chamber …

radial design. As a result, when the pulp lifter reaches the flow-back zone slurry has already begun exiting the mill leaving less in the pulp lifter to flow back into the mill. The data collected in these programs were used to develop a mathematical model to help design and size grates and pulp lifters to avoid capacity limitations.


SAG Mill Pulp Dischargers - Grinding & Classification ...

Modern Semi-Autogenous (SAG) Grinding Mills can be up to 12 metres in diameter (absorbing up to 20 MW of power) and need to discharge over 2500 tonnes per hour of solids via pulp lifters. Pulp lifters take the form of a radial array of "box-section" channels mounted inside the discharge end wall of the mill.


Turbo Pulp Lifter (TPLTM) - An Efficient Discharger to ...

SAG mill was crash stopped using the air brakes. Figure 6 shows the snapshot of DEM simulation and the picture taken after crash stop at 9 O'clock. Figure 5: Pebbles carry-over inside the pulp lifter a) in 36-ft SAG mill, and b) DEM simulation. This work confirms that there is a significant quantity of coarse pebbles always remaining inside


Optimizing your SAG mill operation - International Mining

Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills. Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm).


(PDF) A New Design of Pulp Lifter for Grate Discharge Mills

A detailed investigation by Latchireddi (2002), Latchireddi and Morrell (1997, 2003a and 2003b) on impact of the discharge grate and pulp lifters on slurry transport in SAG mills revealed the ...


Semi-autogenous grinding (SAG) mill liner design and ...

needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e., the impact of shell liners on the grinding action and of grates and pulp lifters on pulp discharge. In recent years, the trend in large SAG mills has been to use wide-spaced shell lifters with large lifter face angles, primarily to


Outotec presents the world's largest SAG mill - Mineral ...

The SAG mill design is based on Outotec's proprietary grinding mill technology, developed over decades for maximum reliability and performance. The mill will be operated as a single stage SAG mill (primary and secondary duty combined) with very high throughput made possible by the use of Outotec's patented Turbo Pulp Lifter (TPL™) Technology.


Performance characterisation of AG/SAG mill pulp lifters ...

The pulp lifter is an integral component of autogenous (AG) and semi-autogenous (SAG) grinding mills as it controls the throughput, performance and efficiency of mills. The slurry transport from ...


Performance characterisation of AG/SAG mill pulp lifters ...

The pulp lifter is an integral component of autogenous (AG) and semi-autogenous (SAG) grinding mills as it controls the throughput, performance and efficiency of mills. The slurry transport from the AG/SAG mill through grate holes into the discharge trunnion is the main function of the pulp lifter. This process develops complex flow behaviour ...


Slurry flow in mills: grate-pulp lifter discharge systems ...

Summary and conclusions. The slurry transportation in AG/SAG mills is a two-stage process consisting of flow through the grate and the discharge of slurry by pulp lifters into the discharge trunnion. The grate-only discharge condition provides the ideal relation between slurry hold-up and flowrate.


Performance characterisation of AG/SAG mill pulp lifters ...

The pulp lifter is an integral component of autogenous (AG) and semi-autogenous (SAG) grinding mills as it controls the throughput, performance and efficiency of mills. The slurry transport from the AG/SAG mill through grate holes into the discharge trunnion is the main function of the pulp lifter.


Performance characterisation of AG/SAG mill pulp lifters ...

The pulp lifter is an integral component of autogenous (AG) and semi-autogenous (SAG) grinding mills as it controls the throughput, performance and efficiency of mills. The slurry transport from the AG/SAG mill through grate holes into the discharge trunnion is …


SAG Mill Grinding Circuit Design - 911metallurgist.com

Based on experience, mill-liner designs have moved toward more open-shell lifter spacing, increased pulp lifter volumetric capacity, and a grate design …


Semi-autogenous grinding (SAG) mill liner design and ...

SAG mill liner development draws primarily on practical experience from SAG milling operations supported by computer-based modeling of charge motion in SAG mills and on established good design practice. Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e., the impact of shell liners on the …


Performance characterisation of AG/SAG mill pulp lifters ...

The pulp lifter is an integral component of autogenous (AG) and semi-autogenous (SAG) grinding mills as it controls the throughput, performance and efficiency of mills. The slurry transport from the AG/SAG mill through grate holes into the discharge trunnion is the main function of the pulp lifter. This process develops complex flow behaviour in the region of the …


Improving Autogenous/Semi-Autogenous Grinding …

over inside the pulp lifter. The discharge of water from pulp lifter in pilot scale mill is shown in Figure 5 and the discharge of slurry from single stage SAG mill operating at 13 rpm (78 per cent critical speed is shown in Figure 7. It can be seen from Figure 7 that the discharge is occurring in a narrow space between the 1.30 and three o'clock


AG & SAG Mills Curved Pulp Lifters - 911 Metallurgist

A curved pulp lifter and curved composite cantilever grate system was retro-fitted to the Northparkes 24 ft SAG Mill (the Bradken "Vortex" design). The …


The development of optimised pulp lifter design for the ...

The development of optimised pulp lifter design for the Ahafo SAG mill using DEM modelling Watch. Tailing filtration practices in Mexican gold and silver mines Watch. Developing flotation circuit control and automation for the Phu Kham Copper-Gold Concentrator Watch. Getting the most from existing processes – using cleverly designed ...


Grinding mill upgrades - Outotec

A pulp lifter is used in grate discharge mills to pump the ground ore from the mill. An inefficient pulp lifter can cause a slurry pool to build up in the mill, resulting in partial dissipation of charge (balls and rock) kinetic energy into the fluid, …


AG/SAG Mill Liners - Polycorp

AG/SAG Mill Liners. We have supplied rubber pulp lifters for SAG mills up to 40 ft in diameter. We are pioneers in the design of both radial and curved pulp lifters, also design and manufacture Rubber / PolyStl™ grates and discharge systems.