Grain Milling, Dry Bulk Food & Feed Handling calculator

Rework/Feed Return Calculator

Estimate the practical rate for rework or feed return processing by comparing returned product weight with runtime and rework handling efficiency. Use it when off-spec feed, fines, pellet returns, screened material, customer returns, or in-process rework must be routed back through grinding, mixing, pelleting, or loadout.

What this calculator does

  • Estimate the practical rate for rework or feed return processing by comparing returned product weight with runtime and rework handling efficiency.
  • Use it when off-spec feed, fines, pellet returns, screened material, customer returns, or in-process rework must be routed back through grinding, mixing, pelleting, or loadout.
  • Estimates how quickly returned or rework material can be processed back through the operation.

Formula used

  • Raw rework/feed return throughput = returned or rework weight ÷ rework handling runtime
  • Effective rework/feed return throughput = raw throughput × rework handling efficiency

Inputs explained

  • Returned or rework weight: Enter off-spec feed, pellet fines, screened material, reclaim, customer return, or in-process rework weight.
  • Rework handling runtime: Use hours spent sorting, transferring, grinding, remixing, pelleting, or otherwise processing the rework.
  • Rework handling efficiency: Account for QA checks, routing limits, bin availability, regrind losses, operator handling, and blending restrictions.

How to use the result

  • Use for off-spec disposition, feed return planning, fines recovery, customer returns, and rework capacity checks.
  • This calculator is an estimating and planning tool. Results can change with grain type, commodity grade, test weight, bulk density, moisture percentage, temperature, fines content, particle size, screen condition, hammer or roller wear, mill gap, aspiration, dust load, bin geometry, hopper angle, angle of repose, bridging or ratholing, conveyor loading, belt speed, screw fill, bucket spacing, pneumatic conveying velocity, mixer fill level, ingredient scale accuracy, bag weight, pallet pattern, labor coverage, sanitation requirements, allergen controls, rework policy, shrink history, utility rates, and actual plant operating data. Validate food-safety, feed-safety, combustible-dust, structural, regulatory, and safety-critical decisions with qualified process, quality, maintenance, engineering, and EHS experts.

Common questions

  • What information do I need before using the Rework/Feed Return? Use returned weight, handling runtime, and efficiency for the same rework stream and routing.
  • What does the result mean? The result estimates effective rework processing throughput.
  • When is the result only an estimate? This calculator is an estimating and planning tool. Results can change with grain type, commodity grade, test weight, bulk density, moisture percentage, temperature, fines content, particle size, screen condition, hammer or roller wear, mill gap, aspiration, dust load, bin geometry, hopper angle, angle of repose, bridging or ratholing, conveyor loading, belt speed, screw fill, bucket spacing, pneumatic conveying velocity, mixer fill level, ingredient scale accuracy, bag weight, pallet pattern, labor coverage, sanitation requirements, allergen controls, rework policy, shrink history, utility rates, and actual plant operating data. Validate food-safety, feed-safety, combustible-dust, structural, regulatory, and safety-critical decisions with qualified process, quality, maintenance, engineering, and EHS experts.
  • What decision can I make from the result? Use it to decide whether to rework, scrap, blend down, dedicate a bin, or schedule extra processing time.

Last reviewed 2026-05-12.