Whole Process Digital Design Of Hengin SAG mill liners

With the increase of grinding process demand, the improvement of R & D and design ability and the development of heavy equipment manufacturing industry, the large-scale SAG mill has become a trend. SAG mill is a revolving body composed of feed head, shell part and discharge head. In the process of equipment operation, the mill liner plays a certain protective role to prevent the destructive wear of the shell caused by the impact of grinding medium and materials; at the same time, the grinding effect of materials and media is produced when they are thrown and dropped, so as to achieve the purpose of crushing and grinding ore. SAG mill liner design is the key factor to determine the stable operation of the SAG mill. Whether its structure is reasonable or not has an important impact on the mill performance, grinding effect and liner service life.

Hengin has carried out the whole process digital design of the structure, material, manufacturing, use and other aspects of SAG mill liners, which has achieved the accurate prediction and control of crushing, grinding effect, ore handling capacity, discharge particle size and service life of SAG mill liners.

1.Structural design of SAG mill liners

Hengin designs the structure of the feeding and discharge mill head liner and SAG mill shell liner of SAG mill liners according to the structure size, critical speed, processing capacity, mineral properties and other parameters of the mill. The key parameters include the number of lifting bars, the spacing of lifting bars, the angle of lifting bars, etc.

2. Calculation and Simulation of the trajectories of abrasives and minerals dropped by SAG mill liners

We use EDM and milltraj to calculate and simulate the trajectories of dropping, discharging and rolling of abrasives and minerals, and accurately simulate and predict the toe of the farthest point of abrasives dropping.

3.SAG mill liner casting process design and simulation

We accurately calculated the casting process of SAG mill liners and simulated and optimized it with praocast software to eliminate casting defects and ensure the internal quality of liner. We have accumulated abundant data in this aspect.

4.Material parameters of SAG mill liners

According to the chemical composition of materials and the phase transformation process at different temperatures, AC1, AC3 and other parameters can be mastered. The phase transformation temperature, phase transformation time and phase composition of CrMo alloy were accurately controlled by heat treatment process.

5.SAG mill liner in 3D scanning

Our technicians have mastered the 3D scanning tools and software, which can scan the SAG mill liner in use, clearly observe the service status of the liner, predict the service life of the liner in different parts of the mill in advance, and provide the basis for the optimization and improvement of the liner in the future.