In numerous industrial sectors such as metallurgy, electroplating, battery manufacturing, and titanium dioxide production, the treatment and recycling of waste acid have long posed challenges that involve both environmental pressures and economic burdens. Among these challenges, the efficient and economical separation and recovery of metal ions such as iron and zinc contained in waste acid remain key bottlenecks restricting enterprises from achieving green transformation and sustainable resource utilization. Traditional neutralization and precipitation methods not only consume large amounts of alkali and generate difficult-to-manage sludge, but also lead to the dual waste of both acid and valuable metal resources.

Faced with this common challenge in the industry, Tiei Extraction, leveraging its profound technological foundation, has launched the CWL-M series centrifugal extractor, bringing a highly efficient, clean, and resource-oriented technological revolution to the waste acid recovery field.

Why Choose Centrifugal Extraction Technology?

As a mature separation technology, solvent extraction offers significant advantages such as high selectivity, high recovery rates, excellent product purity, and the ability to operate continuously. The centrifugal extractor is the core equipment that enables this process to run efficiently. By generating strong centrifugal forces through high-speed rotation, it completes mixing, mass transfer, and phase separation in an instant, making it particularly suitable for systems with small density differences, a tendency to emulsify, or requiring very short residence times.

In waste acid recovery applications, selecting the appropriate extractant allows the free acid or target metal ions (such as iron or zinc) in the waste acid to be selectively transferred into the organic phase, enabling efficient separation of acid from metals or separation between different metals. The loaded organic phase can then undergo stripping and subsequent steps to recover high-purity acid and metal salts, truly achieving the goal of turning waste into valuable resources.

Tiei Extraction CWL-M Series Centrifugal Extractor

1.Outstanding Separation Efficiency and Processing Capacity
Efficient mixing and rapid separation: The precisely engineered rotor structure ensures thorough mixing of the aqueous and organic phases within an extremely short time, enabling highly effective mass transfer. The strong centrifugal field guarantees complete phase separation, producing clear raffinate with minimal entrainment, directly improving recovery rates and reducing operating costs.
High-throughput design: This series centrifugal extractor offers models suitable for everything from laboratory-scale tests to large-scale industrial production. Each unit provides a high processing capacity, reducing footprint and lowering equipment investment costs.

2.Accurate and Efficient Iron–Zinc Separation
For waste acid systems where iron (Fe³⁺/Fe²⁺) and zinc (Zn²⁺) commonly coexist, the CWL-M series is perfectly suited for the “selective extraction–stripping” process. By precisely controlling parameters such as rotation speed, phase flow ratio, and the number of extraction stages, it can flexibly achieve:
Selective zinc extraction: At specific acidity conditions, zinc can be selectively extracted, separating it from iron and residual acid to obtain a purified zinc solution.
Deep iron removal: Using tailored extractants, iron can be preferentially extracted, leaving a purified acid solution that can be reused or further processed for zinc recovery.
Synergistic acid–zinc recovery: Through multi-stage counter-current extraction, both free acid and zinc can be recovered simultaneously, maximizing resource value.

3.Unmatched Stability and Reliability
Outstanding corrosion resistance: All wetted components can be manufactured from high-strength stainless steel, Hastelloy, titanium, or lined with specialized polymer materials. This ensures excellent resistance to strong acids, chloride-rich environments, and other harsh corrosive conditions—supporting long-term, stable equipment operation.
Advanced sealing technology: The patented sealing system effectively prevents leakage, ensuring production safety and environmental compliance. It is particularly well-suited for volatile, toxic, or hazardous solvent systems.
Low energy consumption and minimal maintenance: With direct-drive power transmission and a compact structure, energy usage is significantly lower than traditional mixer-settlers. Modular design makes maintenance fast and straightforward.

4.Enhancing Cost Efficiency and Supporting Green Development
Resource recovery value: The acid and metals in waste acid are transformed into reusable products, generating direct economic benefits and offsetting treatment costs.
Environmental compliance: Significantly reduces hazardous waste (sludge) generation and disposal expenses, helping enterprises easily meet increasingly stringent environmental regulations.
Broad process adaptability: Suitable for pickling waste acids from the steel industry (hydrochloric acid, sulfuric acid), titanium dioxide waste sulfuric acid, and hydrometallurgical leach solutions. Its high efficiency also makes it an excellent choice across a wide range of liquid–liquid extraction and separationapplications.

Proven Applications, Proven Value

The Tiei Extraction CWL-M series centrifugal extractor has been successfully implemented in waste acid recovery projects for numerous well-known enterprises, delivering stable and reliable performance. For example, in the hydrochloric acid pickling waste liquid recovery project of a major steel manufacturer, the system achieved highly efficient recovery of free HCl and the concentration and purification of ferrous chloride solution. In another case, within a hydrometallurgical zinc refinery, the technology enabled efficient separation of zinc from impurity metals in the leach solution, significantly improving electrolytic zinc quality and overall metal recovery rate.

The CWL-M series centrifugal extractor is not only suitable for waste acid recovery but are also widely used in chemical production, pharmaceuticals, environmental protection, hydrometallurgy and many other fields. The equipment supports both standalone operation and multi-unit configurations, making it adaptable to various extraction systems. For process validation or equipment selection needs, welcome to contact Tiei Extraction.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820