Granular raw materials
Urea, MAP, DAP, KCl, K2SO4. Free-flowing; belt or gravity feeders.
01 · Complete production solution
Automatic Batching & Weighing System
The weighing and dosing core of a blending plant: silos, feeders, weigh hoppers and recipe control, supplied as a system that can feed a mixer, a granulator or a packing line.
02
Quick answer
What this line is
Batching is where a blend is won or lost. This system meters each raw material by weight against a stored recipe, records the batch, and discharges a homogeneous mix to whatever comes next. It contains no granulation and no drying.
The weigh hopper is the quality instrument; everything downstream inherits its error.
03
Inputs
Suitable raw materials
Any free-flowing granular or powdered material can be batched, provided the feeder type matches its flow behaviour.
Powders
Filler, micronutrients and conditioners. Prone to bridging; screw feeders with agitation.
Moisture-sensitive salts
Need dry air or sealed silos to keep flow stable.
Micronutrients
Small shares dominate the accuracy requirement; often weighed on a separate small scale.
Recycled fines
Returned from screening, metered back into the recipe.
04
Output
Target finished product
The output is not a product but a guaranteed batch: the weight record is what the downstream process and the customer audit rely on.
Batch record
Ingredient weights, recipe version, operator and time, exportable.
Recipe switching
Stored formulas recalled without re-entering weights.
Homogeneity
Achieved in the mixer that follows; batching only guarantees the input ratio.
Traceability
Batch number tied to the packed bags.
05
Production sequence
Process flow
Four stages plus an optional mixer. The system is deliberately independent of the granulation line so it can be added to an existing plant.
| Stage | Purpose | Key equipment | Control point |
|---|---|---|---|
| 1. Storage | Hold raw materials without segregation | Silos and day bins | Angle of repose, bridging |
| 2. Feeding | Deliver material to the scale at controlled rate | Screw or belt feeders | Feed rate vs. scale capacity |
| 3. Weighing | Cut each ingredient at the recipe weight | Weigh hopper with load cells | Calibration interval, tare drift |
| 4. Discharge / mixing | Release the batch, homogenise if required | Double-shaft mixer | Residence time |
Why this order: a system sized only on total tonnage will fail on the small ingredients. Accuracy is set by the smallest share in the recipe, so the scale range follows that number.
06
Equipment
Equipment configuration
Typical equipment scope for this route. Final selection follows the approved mass balance and site conditions.
07
Capacity
Capacity bands
Bands describe typical project scale; the actual figure is confirmed by mass balance, not by a nominal model number.
Manual bag feeding, single scale, recipe by selector switch.
Multi-silo automatic feeding with PLC recipes and batch logging.
Continuous blending with in-line weighing and automatic changeover.
08
Operation
Utility requirements
Basis for the utility sheet. Local voltage, fuel and water quality are confirmed during engineering.
Power
Feeders, scales and PLC; modest compared with a granulation line.
Compressed air
For cylinders and bin vibrators.
Dry air
Optional, for hygroscopic salts.
Foundation
Load-bearing for loaded silos; vibration isolation for the scales.
09
Quality
Quality control points
Controls that decide whether the line holds its specification in daily operation.
Scale calibration
Scheduled and logged; drift is silent.
Small-ingredient handling
The usual source of out-of-spec batches.
Recipe versioning
Every batch record must name the version used.
Cleanout between recipes
Prevents carry-over between formulas.
10
FAQ
Questions buyers ask
Straight answers on scope, limits and what we need to quote.
How accurate is the batching?
It depends on the smallest ingredient share and the scale range chosen for it. We size the scale from the recipe, then state the achievable tolerance.
How many silos do we need?
One per raw material plus filler; micronutrients are often batched from bags on a small scale.
Can it feed an existing granulator?
Yes. The discharge conveyor is configured to the existing inlet height and rate.
Does it include mixing?
Optional. Batching only fixes the ratio; homogenisation happens in the mixer.
11
Next step
Request a project review
Send material, capacity and site constraints; the engineering team replies with a route recommendation.
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