Curved discharge end of AG mill SAG mill

1, Overview

In recent years, large type SAG, AG and ball mills have been widely used in every concentrator , Mill liner become an important and customized wear part of different mills. Determining the appropriate liner type and design is critical to optimizing mill output and total grinding costs, including energy, grinding media and maintenance costs. Naipu has been committed to the R&D of new technology and high efficiency for mill liner for many years. We work closely with our customers and follow up the entire process to ensure that the liners is always optimized according to current operating conditions. After long term research and test, Naipu design and manufacture for a new type of mill liner, the curveddischarge end, which is suitable for all type AG and SAG mill. It can optimize the mill output, reduce cost with longer service life.

2, Features

2.1  Increase the discharge capacity 30% more than the straight structure lifters.

2.2  Reduce the abrasion of lifters and the returning of pulp and improve the service life of the liner.

2.3  Improve the efficiency of the mill;

3,  Comparison between straight and curved discharge end.

Through the discrete element simulation of two kinds of structure liners, the discharge rate of the curved structure after the transformation is increased by about 50%.

The curved discharge end is smooth and has less pulp return, reducing the abrasion of recoil brush on the lifters.

Curved outer area worn

Curved middle area worn

4, Applications

1. 9.5x5.4 SAG Mill with curved structure in Almarek, Uzbekistan

Discharge curve of metal lifters before upgrading

Discharge curve of metal lifters after upgrading

3、10.37x5.19 SAG Mill Discharge End with curved structure in Dexing Copper

Original Straight Discharge end structure

 Curve Structure (After)

Comparison of Grate Plate

Straight Structure (Before) 

Curved Structure (After)

Comparison of Outer Lifter Bar

Straight Structure (Before) 

Curved Structure  (After)

Comparison of Discharging by Discrete element simulation analysis animation

Straight Structure (Before) 

Curved Structure  (After)

Comparison of Discharging

Compared with the two structures, the discharge capacity rate of the curved discharge end increases obviously

Total Dischage Capacity-Time                               

Straight Structure (Dischage Capacity-Time)

Total Dischage Capacity-Time

Comparison of Returning of Pulp

Straight Structure (Before)

 Curved Structure (After)