With the booming development of industries such as electroplating, metallurgy, and battery manufacturing, the treatment of large amounts of zinc-rich waste acid has become an environmental and resource problem that needs to be solved urgently. Traditional chemical precipitation methods are not only inefficient, produce large amounts of sludge, and have high disposal costs, but also cause serious loss of precious zinc resources. How to achieve efficient, economical and environmentally friendly recycling of waste zinc acid? Tiei Extraction CWL-M centrifugal extractor combines mature solvent extraction technology to provide you with excellent solutions!

Core Technology: solvent extraction combined with CWL-M centrifugal extractor

1.Pretreatment: The waste acid first undergoes precision filtration, oil removal, impurity removal and other steps to remove suspended matter and impurities that may interfere with extraction, ensuring the subsequent extraction efficiency.
2.Extraction: The purified zinc-containing waste acid is mixed with a specific organic extractant at high speed in a CWL-M centrifugal extractor. The extractant is highly selective for zinc ions, rapidly transferring the zinc ions from the aqueous phase to the organic phase.
3.Separation: The CWL-M centrifugal extractor utilizes a powerful centrifugal field to efficiently and thoroughly separate the zinc-loaded organic phase from the zinc-depleted aqueous phase in a very short time. The zinc-depleted aqueous phase can be further purified to meet discharge standards or reused.
4.Washing: The zinc-loaded organic phase may carry a small amount of impurities or acid, which can be washed and purified in another centrifugal extractor stage with a small amount of washing water.
5.Stripping: The purified loaded organic phase and stripping agent are efficiently mixed and contacted again in the centrifugal extractor. Under specific conditions, zinc ions are efficiently transferred from the organic phase to the stripping agent aqueous phase, forming a high-purity, high-concentration zinc sulfate solution.
6.Regeneration: After the removal of zinc ions, the organic phase (regenerated organic phase) can be recycled back to the extraction section for repeated use after simple adjustment, which significantly reduces operating costs.
7.Zinc products: High-concentration zinc sulfate solution can be sold directly as a product, or further processed through processes such as electrowinning and crystallization to produce metallic zinc or high-quality zinc salts.

Why choose Tiei Extraction CWL-M Centrifugal Extractor?

1.The King of Efficiency
Extremely fast mass transfer and separation: Powerful centrifugal force enables millisecond-level mixing and second-level separation, significantly shortening process time and far exceeding the processing capacity of traditional mixer settler.
Minimal stage retention: The amount of liquid held inside the equipment is small, and the material residence time is short, which significantly reduces solvent backlog and loss and improves system response speed.
2.High recovery rate and purity
Efficient separation: High centrifugal forces ensure extremely thorough separation of the organic and aqueous phases with virtually no carryover, guaranteeing high zinc recovery (typically >99%) and high stripping liquid purity.
High stage efficiency: Single-stage extraction/stripping efficiency is excellent, reducing the number of stages required and simplifying the process.
3.Significantly reduced operating costs
Less solvent loss: Closed design and efficient separation effectively reduce organic solvent volatilization and entrainment loss.
Low energy consumption: Compared with traditional equipment, the energy consumption per unit processing volume is significantly reduced.
Small footprint: Modular design and compact structure save valuable factory space and reduce infrastructure investment.
4.Easy operation and maintenance
Quick start and stop: small liquid holding volume, short system equilibration time and flexible operation.
High degree of automation: Easy to integrate with DCS/PLC system to achieve full process automation control and reduce manual intervention.
Easy maintenance: Simple design, few major moving parts, and low maintenance workload.
5.Safe and environmentally friendly
Fully enclosed operation: Effectively prevents the escape of volatile organic compounds (VOCs) and the generation of acid mist, improving the working environment and meeting stringent environmental protection requirements.
Reduce hazardous waste: Recycle zinc resources at the source, greatly reducing the generation and treatment costs of secondary hazardous waste such as neutralization sludge.
6.Strong adaptability
The rotation speed, flow ratio and other parameters can be flexibly adjusted to adapt to waste acid raw materials with different acidity, zinc concentration and impurity content.
Modular design allows for easy capacity expansion.

Choosing a solvent extraction process centered around Tiei Extraction's CWL-M centrifugal extractor is not only the key to efficiently recovering high-value zinc from waste acid, but also the inevitable choice for companies to achieve cost reduction and efficiency improvement, green transformation, and a circular economy. Tiei Extraction provides a comprehensive solution, from process development and equipment supply to engineering services.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820