Granular urea
Nitrogen source; prilled or granular. Granular form blends better with MAP and potash.
01 · Complete production solution
NPK Bulk Blending Line
Dry blending of granular NPK raw materials: weigh, mix, bag. No chemical reaction, no granulation, no drying, and a new formula can be sold the same week.
02
Quick answer
What this line is
A bulk blending line combines granular raw materials physically. Because nothing is dissolved or dried, the nutrient content of the blend is exactly the sum of its parts, and the plant can hold many formulas with the same equipment.
Blending only works if the raw materials share a similar particle size; that is a purchasing rule, not a machine setting.
03
Inputs
Suitable raw materials
The line accepts any free-flowing granular material. Particle size and bulk density matching is what keeps the bag honest.
Granular MAP / DAP
Phosphorus sources; their size range should bracket the urea range.
Granular potash
KCl or K2SO4. Densest component; tends to settle in the bag.
Filler
Sand, limestone or dolomite to reach the declared analysis.
Conditioner
Anti-caking coating where storage humidity is high.
04
Output
Target finished product
A blend is judged on two things at once: the analysis on the bag and whether the analysis is still the same at the bottom of the bag.
Nutrient ratio
The sum of the weighed components, with no process loss.
Segregation resistance
Governed by matching particle size and density before the blend is made.
Appearance
Uniform granules matter commercially; a striped blend gets rejected even when the analysis is right.
Moisture
Kept low to prevent caking; the line has no dryer to correct it.
05
Production sequence
Process flow
Four stages, all mechanical. The simplicity is the point: the same equipment can run dozens of formulas.
| Stage | Purpose | Key equipment | Control point |
|---|---|---|---|
| 1. Batching | Weigh each granular component | Automatic batching machine | Smallest share sets accuracy |
| 2. Blending | Homogenise without damaging granules | Double-shaft mixer or drum blender | Residence time vs breakage |
| 3. Bagging | Fill to net weight | Packing machine | Weight tolerance |
| 4. Palletising | Stack for transport | Palletiser | Bag stability |
Why this order: a blend with mismatched particle sizes separates in the bag no matter how long you mix it. Material selection is the real quality control on this line.
06
Equipment
Equipment configuration
Typical equipment scope for this route. Final selection follows the approved mass balance and site conditions.
Weighing
Automatic Batching Machine
Blending
Double-Shaft Mixer
Bagging
Fertilizer Packing Machine
Palletising
Palletizer
07
Capacity
Capacity bands
Bands describe typical project scale; the actual figure is confirmed by mass balance, not by a nominal model number.
Single blender, manual bag placing.
Automatic batching and bagging, palletiser optional.
Continuous blending with bulk loadout and bagging in parallel.
08
Operation
Utility requirements
Basis for the utility sheet. Local voltage, fuel and water quality are confirmed during engineering.
Power
Blender and bagging line only; no thermal load.
Compressed air
Bag clamps, cylinders, dust collectors.
Dust collection
At batching, blending and bagging.
Storage
Dry, segregated bays; blending amplifies any moisture problem in the raw materials.
09
Quality
Quality control points
Controls that decide whether the line holds its specification in daily operation.
Particle size matching
Checked on incoming material, per supplier.
Blend uniformity
Sampled at start, middle and end of the batch.
Bag weight
Checked hourly against the declared net weight.
Segregation test
A bag left standing for a week tells you more than a lab test.
10
FAQ
Questions buyers ask
Straight answers on scope, limits and what we need to quote.
Blend or granulate?
Blend when the market accepts physical mixtures and the raw materials match in size. Granulate when you need a uniform granule, a higher analysis, or a product that travels well.
Why does my blend segregate?
Particle size and density mismatch. Fix it in purchasing, not by mixing longer.
Can the same line run organic blends?
Yes, with a separate dust system; organic powders behave differently from granular salts.
What do you need to quote?
Formulas, raw material size ranges, bag size and hourly output.
11
Next step
Request a project review
Send material, capacity and site constraints; the engineering team replies with a route recommendation.
+8615981847286WhatsApp
Please enter the contentSearch
Click to return to the topTOP