PTFE Extracting Tank(Extractors, Extracting Units, and Mixing Clarifiers) are a series of contacting extraction equipment, composed of a mixing system, a mixing zone, a clarification zone, and a phase separation zone. In each stage, the two immiscible liquid phases are mixed, clarified, and phase-separated, thereby achieving mass transfer and separation of the target solute between different liquid phases.
Work Process
The specific operation process of the extraction tank (mixed clarification tank) involves the feed liquid and extractant being pumped into the mixing chamber through their respective feed ports by a feed pump. A high-speed stirrer then mixes the feed liquid and extractant for mass transfer. Subsequently, they flow through overflow baffles into the clarification chamber, where they separate into light and heavy phases under gravity. The separated phases then enter different outlets, completing one extraction cycle. In actual production, the extraction tank is typically a multi-stage series configuration, including extraction, back-extraction, washing, and regeneration sections, among others, and the specific configuration depends on the production process.
To meet customer needs, Zhengfen Separation offers extraction equipment consultation and services: from initial communication, planning, and design of process objectives or operating conditions, to custom production and manufacturing, we help you build the ideal extraction equipment, providing greater peace of mind. Welcome to inquire!
Hotline: 15380766707!
Mixed mass transfer process
Raw Material IntroductionUnrefined raw liquid and extracting agent are separately introduced into the mixing chamber of the extraction tank through their respective feed ports. For instance, inHydrometallurgyIn the process, a water solution containing metal ions is used as the feedstock liquid, while an organic solvent is introduced as another liquid phase into the mixing chamber.
Agitate and MixThe mixing chamber is equipped with a blender, which rotates at high speed, allowing the raw material liquid and solvent to come into full contact and mix. Under the action of blending, the solute is transferred from the raw material liquid to the solvent, forming a two-phase solution. The intensity and duration of blending have a significant impact on the mass transfer efficiency; insufficient blending can result in inadequate contact between the two phases, reducing the mass transfer efficiency; whereas excessive blending may lead to emulsification, increasing the difficulty of subsequent separation.
Separation process
Overflow enters clarification chamberThe mixed liquid enters the clarification chamber through overflow baffles. The clarification chamber is an empty room with a large volume, providing ample space for the liquid to settle and separate.
Gravity Natural SeparationIn the clarification chamber, due to the different densities of the raw liquid and the extractant, under the action of gravity, the two phases gradually separate. The phase with higher density (usually the heavy phase) sinks to the bottom, while the phase with lower density (usually the light phase) floats on top, forming a clear phase interface.
Partial contact reduces mass transfer efficiency; excessive stirring may lead to emulsification, increasing the difficulty of subsequent separation.
Key Features
● High-grade efficiency
●Simple Structure: The extraction tank typically consists of a tank body, interface adjustment pipe, motor reducer, stirring shaft, impeller, speed controller, and a movable platform, with a relatively simple structure.
●Stable Operation and High Adaptability: Due to the larger volume of the extraction tank and the higher liquid storage capacity, it can accommodate a certain range of fluctuations in the material liquid. After balancing, the operation is relatively stable and highly adaptable.
● Scalable Reliability: Single-stage extraction rates and other design parameters remain relatively reliable after scaling up.
Application Fields
● Copper Extraction
Rare Earth Extraction and Separation
Nickel-cobalt extraction
Rare metal extraction
Nuclear Industry
