Which basic setup for a 75-tph crushing plant is best when materials are predominantly 3 inches or smaller?

The best setup for a 75-ton-per-hour (tph) crushing plant when dealing with materials that are predominantly 3 inches or smaller is the use of a secondary unit only. This is because the materials already fall within a size range that is typically suitable for direct processing by a secondary crusher. A secondary unit is specifically designed to further reduce the size of material after it has been pre-treated by a primary crusher or to handle materials that do not require significant initial reduction.

In operations where the feed material is already small, the use of a primary unit may not be necessary. A primary unit generally handles larger, unprocessed materials and reduces their size to a point where they can be managed by secondary crushing. Since the majority of the material in this scenario is already adequately sized, deploying a primary unit could lead to unnecessary operational steps and inefficiencies.

Tertiary units are designed for finer crushing or shaping of material that has already undergone secondary reduction, making them less suitable for materials that are predominantly 3 inches or smaller. Lastly, running all units in tandem would not be ideal in this case, as it could lead to unnecessary complexity, increased costs, and potential over-processing of material that does not require it. In summary, using a secondary unit allows