When you compare granulation proposals, follow the material that returns to the process as well as the product that leaves it. Your fertilizer granulation plant screening circuit needs clear routes for acceptable granules, fines, and oversized material. Ask for a flow diagram that identifies each stream before you compare equipment lists.
Define what the screen separates
Start your fertilizer granulating equipment screen cut review with the product size range your buyers request. Ask the supplier to state the proposed screen openings, sampling points, and method for checking particle-size distribution. Keep the product acceptance limits separate from the screen opening specification, and agree how borderline particles will be assessed.
Trace the return routes
Your fertilizer pellet plant oversize return planning can identify where oversized granules are crushed and where that material rejoins the process. Mark a separate path for fines. Ask whether the two streams share a conveyor or return through different equipment. If you are comparing an NPK fertilizer production line process, confirm the return arrangement for your selected granulation route.
Make the internal load visible
Request a material balance for your fertilizer granulation line recycle load review. Ask the supplier to show fresh feed, returned material, screen feed, and saleable product on the same moisture basis and over the same time interval. Define whether any quoted recycle percentage refers to fresh feed or total circulating material. This keeps different proposals comparable without assuming a fixed return rate.
Check the interfaces
Use your fertilizer granulation system internal material flow diagram to review conveyor transfer points, return bins, crusher discharge, and screen outlets. Ask what happens when a return path stops or a screen blocks. Discuss access for removing accumulated material and how operators can observe changing return flows. Record which supplier provides each connecting chute and control interface.
Turn the review into a purchasing record
Before you agree on the equipment scope, request an annotated flow diagram, a stream table, and a list of unresolved assumptions. Include the proposed sampling locations and responsibility for confirming the screen settings. Keep any expected recycle rate provisional until the supplier supports it for your material and process.
Share your feedstock, required product size range, process route, and layout constraints. Click here for more details and use the discussion to clarify screening and return handling in your proposal.