PLC-Controlled Batching & Mixing System

PLC-Controlled Batching & Mixing System

The Guarantee of Perfect Formulation for Consistent Fertilizer Quality

The PLC-Controlled Batching & Mixing System is a fully automated, recipe-driven solution designed to eliminate errors and variability in the critical first stage of fertilizer production. It precisely weighs and combines multiple solid and liquid raw materials—such as phosphate, potash, urea, and micro-nutrients—according to exact digital formulations. By replacing manual handling and guesswork with robotic precision and programmable logic, this system ensures every batch of blended feedstock has the correct nutrient profile, directly determining the quality and consistency of your final granular product.

PLC-Controlled Batching & Mixing System

Key Features

  • Recipe-Driven Automation

    Centralized PLC executes stored recipes with precision, automatically sequencing the entire batching cycle from ingredient calling to discharge.

  • High-Precision Weighing Technology

    Utilizes multiple load cell-equipped weigh hoppers or gain-in-weight belts for each major ingredient, achieving accuracies of ±0.1% to ±0.5% of full scale.

  • Flexible, Modular Design

    Configured with the number of ingredient feeders (screw, belt, vibratory) and liquid dosing pumps required for your specific formulation complexity.

  • Intelligent Material Handling Logic

    The PLC manages interlocks and sequences to prevent errors, such as ensuring a weigh hopper is empty before a new ingredient is charged.

  • Comprehensive Human-Machine Interface (HMI)

    A color touchscreen provides operators with intuitive control, real-time status display, recipe management, and batch reporting.

Advantages

  • Eliminates Formulation Cost

    Drastically reduces nutrient “giveaway” by preventing over-dosing and minimizes raw material waste from errors, offering a rapid return on investment.

  • Guarantees Product Consistency & Quality

    Ensures every batch and every truckload of fertilizer has the exact nutrient analysis promised to the customer, strengthening brand reputation.

  • Maximizes Production Efficiency

    Automates a labor-intensive process, freeing personnel for other tasks and enabling faster, repeatable batch cycling 24/7.

  • Provides Complete Traceability

    Automatically records batch numbers, ingredient lot codes, actual weights, and timestamps for each production run, simplifying quality control and compliance.

  • Reduces Operational Risk

    Minimizes exposure of workers to dust and chemicals by automating the handling of raw materials.

Applicable Raw Materials

  • Raw Material Pre-Blending

    Preparing homogeneous feedstock for NPK, DAP, or specialty granular fertilizer production lines.

  • Powder-Based Compound Formulations

    Blending base powders and dry additives before granulation.

  • Liquid & Solid Combination

    Precisely incorporating liquid binders, acids (e.g., sulfuric, phosphoric), or micronutrient suspensions into dry mixes.

Basic Structure & Components

PLC-Controlled Batching & Mixing System
Ingredient Storage Hoppers / Bins

Feeders draw material from these.

Precision Feeders

One per major ingredient (screw, belt, or vibratory type) controlled by the PLC.

Weigh Hoppers or Gain-in-Weight Belts

The core weighing units equipped with high-accuracy load cells.

Liquid Dosing Station

Includes storage tanks, pumps, flow meters, and control valves.

Batch Mixer

Receives all weighed ingredients (e.g., ribbon mixer, paddle mixer).

Control Cabinet

Houses the PLC, motor starters, and communication modules.

Operator HMI Station

The central touchscreen for system control and monitoring.

Discharge System

A conveyor or valve to transfer the completed batch to the next process stage.

Technical Data

Parameter

Model BMS-6S (6 Solid Ingredients)

Model BMS-4S2L (4 Solid, 2 Liquid)

Number of Ingredients

6 Solid

4 Solid, 2 Liquid

Weighing Accuracy (per ingredient)

±0.2% of full scale

±0.2% (Solid), ±0.5% (Liquid)

Batch Cycle Time (approx.)

3 – 6 minutes

4 – 8 minutes

Batch Capacity Range

1 – 5 metric tons

1 – 5 metric tons

Control System

Industrial PLC (e.g., Siemens, Rockwell)

Industrial PLC with color HMI

Recipe Storage Capacity

100+ recipes

100+ recipes

Data Logging

Standard (Batch Report, Totalization)

Standard (Batch Report, Totalization)

Note: This is a configurable system. All specifications—number of ingredients, batch size, accuracy, and component brands—are engineered to meet specific client requirements.

Key Differentiators vs. Other Methods

Replaces a slow, error-prone, and labor-intensive process with a fast, precise, and automated one. The ROI is often calculated in months, not years, due to material savings alone.

Eliminates operator judgment and timing errors. A PLC-controlled system provides true hands-off, repeatable precision and comprehensive data records.

Gravimetric (weight-based) control is inherently more accurate than volumetric feeding, as it compensates for material density changes, ensuring consistent mass delivery regardless of flowability.

This is a complete, closed-loop system. A mixer alone requires pre-weighed ingredients; this system automates the entire sequence from raw material to a ready-to-process batch.

It is the non-negotiable technological foundation for any fertilizer producer serious about quality control, cost management, and scalable, reliable production. It is the first and most critical step in building a modern, automated plant.