If the chromium ore raw material is a larger ore, it needs to be fed into the primary jaw crusher through a vibrating feeder, so the rock chrome ore can be fed smoothly and evenly. The vibrating feeder has grid bars, which screen the large pieces on the grid to the primary jaw crusher, and the small pieces below the grid bars go to the fine crusher through a conveyor. This can improve the crushing effect of the primary jaw crusher.

The primary jaw crusher is used to crush the large pieces of rock chrome ore into smaller sizes, and the output material goes to the next fine crusher, the cone crusher. The cone crusher crushes the rock chrome to less than 20mm, which is suitable for feeding into the ball mill, but it will first enter the vibrating screen to screen out the large pieces + 20mm, and then send it back to the cone crusher for further crushing. The 0-20mm underscreen goes into the storage bin before the ball mill. If the plant has a small capacity, the cone crusher can be replaced with other types of fine crushers, such as fine jaw crushers, hammer crushers or impact crushers.