The recycling of waste power batteries usually includes several steps, such as pretreatment, leaching, separation or regeneration. Separation is the key link in the recycling of waste power batteries, and it is also the focus and difficulty in the current research on the recycling of waste power batteries.
After pretreatment and leaching of waste batteries and ternary materials, the metal elements of Co, Ni, Mn and Fe, Zn, Al, and Mg are transferred to the liquid phase, and the solvent extraction method is used to extract nickel, cobalt, and manganese. The whole production process has a short process flow, good impurity removal effect, high metal recovery rate, low cost, and no slag is generated, which will not cause difficulties in slag resource treatment and environmental pollution.
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.
How to choose a suitable mixer settler?
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 |
