Laboratory mixer settler for liquid liquid extraction

Brief Introduction Of Mixer Settler

Mixer settler is widely used in the separation and purification of metals in hydrometallurgical solvent extraction processes. It consists of a mixing chamber that continuously feeds and stirs, and a clarification chamber that relies on gravity to separate liquid phases.
In practice, multi-stage series connection is often used to achieve deep separation of targets. Under certain process conditions, the mass transfer efficiency of the mixing chamber is related to the mixing intensity of the stirring paddle and the contact time of the two phases, while the clarification effect is related to the viscosity, density, surface tension, droplet diameter, clarification area, etc. of the two-phase liquid. Clarification about time. Work process Of Mixer settler 

Mixed mass transfer process
The extraction agent and material liquid enter the submersible chamber or manifold from the bottom of the extraction tank in a certain proportion, and are sucked into the mixing chamber by the wheeled stirring paddle and sheared, mixed and dispersed. At this time, the two-phase liquid is fully mixed, so that the solute is transferred from one phase to the other. The liquid is transferred to another phase of liquid, thereby completing the mixed mass transfer process.
Two-phase Separation process
The mixed liquid overflows from the mixing chamber to the clarification chamber. Due to the different densities of the two phases, the separation of the two phases is completed under the action of gravity. The separated two-phase liquid flows out through the light and heavy phase weirs respectively or enters the next stage. Features

1. Simple structure: The mixer settler generally consists of a cell body, an interface adjustment tube, a motor reducer, a stirring shaft, a stirring paddle, a speed regulator, a movable platform, etc. The structure is relatively simple;
2. Stable operation and strong adaptability: Because the mixer settler has a large volume and a large amount of liquid, it can adapt to a certain range of material and liquid fluctuations. After adjusting the balance, the operation is relatively stable and the adaptability is strong;
3. Reliable scale-up: Single-stage extraction rate and other design parameters are still relatively reliable after scale up.

Widely Application Field:

1. Copper extraction
2. Rare earth extraction and separation
3. Nickel cobalt extraction
4. Extraction of rare and precious metals

Technical Parameters Of Lab Mixer Settler
 

Model	Mixer volume (ml)	Settler volume (ml)	Mixing flux      (L/h)	Motor Power(W)	Diameter of Inlet/outlet (mm)	Single Dimension (L*W*H,mm)
KM-MS-300	300	900~1200	1~5	20	Ø10	325*80*100
KM-MS-500	500	1500~2000	3~10	20	Ø12	434*96*116
KM-MS-1000	1000	3000~4000	5~20	20	Ø12	580*116*149
KM-MS-2000	2000	6000~8000	10~40	60	Ø16	715*145*176
KM-MS-5000	5000	15000~20000	20~100	90	DN15	936*194*240
KM-MS-10000	10000	30000~40000	40~200	120	DN20	1380*250*300

Note:
1. The table shows the commonly used specifications for experimental model, we offer customized according to customer requirements. The industrial mixer settler can be designed and customized according to process requirements such as processing capacity and ratio;
2. Commonly used materials for lab mixer settler are PP, PMMA, transparent PVC, and PTFE.

Option Equipment For Skid-mounted:

1. Feed pump, such as peristaltic pump, centrifugal pump
2. Temporary storage tank
3. Heavy phase reflux device
4. Siemens motor, frequency converter, etc.

Procurement Decision Recommendations:

1. Select by Separation Technology:
* Gravity Mixing and Clarification Equipment: Utilizes density differences for separation; simple structure and wide application range.
* Centrifugal Separation Equipment: Enhances separation through centrifugal force; suitable for difficult-to-separate systems or high-efficiency requirements.

2. Select by Experimental Scale:
* Laboratory scale: Capacity 300ml-10L, suitable for R&D and process validation.
* Pilot-Scale: Capacity 1L-100L, suitable for process scale-up and small-scale production.
* Industrial scale: Capacity 100L and above, suitable for continuous large-scale production.

3. Selection according to application field and equipment requirements
 

Application Field	Typical Process	Equipment Requirement
Hydrometallurgy	Non-ferrous metal extraction and separation	Corrosion resistance, continuous operation
Fine chemicals	Solvent extraction and purification	High purity, no pollution
Pharmaceutical	Active ingredient extraction	GMP standard, easy to clean

Packing & Shipping
Standard export wooden case packing for safe international transportation. Available for sea freight, air freight, and express delivery worldwide.


FAQS


1.What is a mixer settler?

A mixer settler is a liquid-liquid extraction device used for mixing two immiscible liquids and separating them into different phases. It is widely used in solvent extraction, hydrometallurgy, rare earth separation, and chemical processing industries.

2. What materials are available for mixer settlers?

Common materials include:

• PP (Polypropylene)
• PVC
• PTFE
• Stainless Steel 304/316L
• Glass

Material selection depends on chemical corrosion resistance and process requirements.

3.What is the difference between a mixer settler and a centrifugal extractor?

Mixer settlers use gravity for phase separation, while centrifugal extractors use centrifugal force for rapid separation. Centrifugal extractors are faster and more compact, while mixer settlers are simpler and suitable for laboratory and pilot-scale testing.

4. Can the mixer settler be customized?

Yes. The mixer settler can be customized according to:

• Stage number
• cell volume
• Material
• Flow capacity
• Agitator type
• volume of mixer and settler 
• removable frame

5.What is counter-current extraction?

Counter-current extraction means the aqueous phase and organic phase flow in opposite directions through multiple stages, improving extraction efficiency and solvent utilization.

For more information about our mixer settler systems, please contact us for technical support and quotation.
We have an experienced and professional R&D team. We will listen carefully to understand your needs, goals, and problems. Our team will work with you to devise solutions and ensure that every feature is tailored to you.