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Stirring Tank

Updated: 2026-07-24

Overview

A mixing tank is a versatile industrial vessel designed for combining materials into a uniform mixture. It consists of a container, agitator, motor, and often additional features like temperature control or baffles. These tanks are critical in industries such as chemical manufacturing, pharmaceuticals, and food processing, where precise blending is essential. Mixing tanks vary in size, from small laboratory-scale units to large industrial tanks exceeding 10,000 liters. The design and materials are selected based on the application, ensuring compatibility with the substances being processed. Common configurations include top-mounted, side-entry, or bottom-entry agitators.

Structure and Working Principle

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The primary components of a mixing tank include the tank body, agitator (impeller or paddle), drive motor, and support structure. The tank body is typically cylindrical with a flat, dished, or conical bottom to facilitate mixing and drainage. The agitator rotates to create fluid motion, ensuring thorough blending. Working principles vary by impeller type: propeller agitators generate axial flow for low-viscosity liquids, while turbine agitators handle higher viscosities. Baffles may be installed to prevent vortex formation and improve mixing efficiency. Advanced models include programmable controls for speed and timing.

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Key Features

Modern mixing tanks offer features like variable-speed motors, which allow operators to adjust agitation intensity based on material properties. Corrosion-resistant materials (e.g., stainless steel) are standard for harsh chemical environments. Some tanks include heating or cooling jackets to maintain optimal temperatures during mixing. Other features include sanitary designs for food/pharmaceutical use, CIP (Clean-in-Place) systems, and explosion-proof motors for volatile materials. Customizable accessories, such as level sensors or sampling ports, enhance functionality.

Application Areas

Mixing tanks are indispensable in chemical production for creating homogeneous solutions, suspensions, or emulsions. In pharmaceuticals, they ensure uniform drug formulations. The food industry uses them for blending ingredients, while wastewater treatment relies on tanks for flocculation and neutralization. Other applications include paint manufacturing, cosmetics, and biotechnology. Specialty tanks with aseptic designs are used in vaccine production, while heavy-duty models serve mining and mineral processing.

Maintenance and Precautions

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Regular maintenance includes inspecting seals, bearings, and agitator alignment to prevent leaks or mechanical failure. Lubrication of motor components and checking for wear in impellers are essential for longevity. Corrosion-prone areas should be monitored, especially in acidic or alkaline environments. Precautions include avoiding overfilling, which can strain the motor, and ensuring compatibility between tank materials and processed substances. Proper grounding is critical for tanks handling flammable liquids to prevent static discharge hazards.

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B2B Procurement Guide

When procuring mixing tanks, evaluate material compatibility, capacity requirements, and agitation efficiency. Stainless steel (SS316) is preferred for corrosive applications, while FRP suits budget-conscious projects. Confirm certifications like ASME or FDA compliance for regulated industries. Request detailed specifications, including motor power, impeller type, and optional features. Compare lead times and after-sales support. For reference, prices range from $1,000 for basic models to $50,000+ for customized, large-scale units.

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