The installation of a ROM (run-of-mine) wall at the primary crusher is typically done to manage the size and consistency of the material being fed into the plant.

ROM refers to the raw material that is extracted from the mine and has not yet undergone any processing. The ROM wall is a barrier that separates the raw material from the crusher, allowing operators to control the flow and size of material being fed into the plant.

By controlling the size and consistency of the material, the ROM wall helps to optimize the efficiency of the crushing process. This is important because the size of the material can significantly impact the performance of the plant downstream.

Additionally, the ROM wall can also help to reduce the wear and tear on the crusher by preventing oversized or irregularly shaped rocks from entering the machine. This can increase the lifespan of the crusher and reduce maintenance costs over time.

Overall, the installation of a ROM wall at the primary crusher is a common practice in the mining industry that helps to optimize the performance and efficiency of the plant.