PTFE Extracting Tank(Extraction boxes, extractors, and mixing clarification units) are a series of contact extraction equipment, consisting of a mixing system, mixing zone, clarification zone, and 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 working process of the extraction tank (mixed clarification tank) involves the料液andextractant entering the mixing chamber through their respective feed inlets, powered by a feed pump. A high-speed agitator then mixes the料液andextractant for mass transfer. Subsequently, the mixture flows through overflow baffles into the clarification chamber, where separation of the light and heavy phases occurs under gravity. The separated phases then enter different outlets, completing the extraction process. In actual production, the extraction tank is typically a multi-stage series arrangement, including stages such as extraction, counter-extraction, washing, and regeneration, which are configured according to the specific production process.
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Mixed Mass Transfer Process
Raw Material IntroductionThe raw material liquid and the extracting agent are separately introduced into the mixing chamber of the extraction tank through their respective feed ports. For example, inHydrometallurgyIn the process, a water solution containing metal ions is used as the raw liquid, while an organic solvent is introduced as another liquid phase into the mixing chamber.
Agitate and blendThe mixing chamber is equipped with a blender that rotates at high speed, allowing the raw material liquid and extractant to come into full contact and mix. Under the action of the blending, the solute transfers from the raw material liquid to the extractant, forming a two-phase solution. The intensity and duration of blending significantly affect the mass transfer efficiency. Inadequate blending can result in insufficient contact between the two phases, reducing the mass transfer efficiency; excessive blending, however, may lead to emulsification, increasing the difficulty of subsequent separation.
Separation process
Overflow enters the clarification chamberThe mixed liquid enters the clarification chamber through overflow baffles. The clarification chamber is a spacious room with a large cavity volume, providing ample space for the liquid to settle and separate.
Gravity Natural SeparationIn the clarification chamber, due to the different densities of the feedstock liquid and the extracting agent, under the influence of gravity, the two phases gradually separate. The denser phase (usually the heavy phase) sinks to the bottom, while the less dense phase (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 regulating tube, motor reducer, agitator shaft, agitator blades, speed controller, and a movable platform, making the structure relatively simple.
Stable Operation and High Adaptability: Due to the larger volume of the extraction tank and higher liquid storage capacity, it can accommodate fluctuations in feedstock within a certain range. After adjustment and balance, the operation is relatively stable and highly adaptable.
● Scalable Reliability: The single-stage extraction efficiency 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
