In the copper smelting process, the ash leachate contains a variety of valuable metals such as copper, zinc, lead, bismuth, etc. How to efficiently and environmentally friendly recover these metals has always been a major issue facing smelting companies. The traditional iron replacement process has many problems such as low recovery rate, high impurity content, and the generation of toxic gases. Zhengzhou Tiei Extraction Technology Co., Ltd. has provided innovative solutions to this industry problem with its advanced centrifugal extraction technology.
At present, the industry generally adopts the iron replacement process to treat the leaching solution of copper smelting ash. Although this method is simple to operate, it has obvious defects: the output sponge copper has high impurity content, which makes subsequent disposal and reprocessing difficult; the introduction of iron requires additional iron removal treatment of the solution, which easily produces colloidal iron that affects filtration; more seriously, it may produce highly toxic AsH3 gas, threatening production safety. In addition, the traditional box extraction process is limited in the field of ash leachate treatment due to problems such as long process, high consumption of auxiliary materials, and high cost.
Centrifugal Extraction Process
Zhengzhou Tiei Extraction launched the CWL-M new centrifugal extractor developed independently to achieve the recovery of valuable metals. This process achieves efficient recovery of copper elements through a multi-stage countercurrent extraction-washing-strip extraction process.
1.High-efficiency extraction system: Using Lix984/sulfonated kerosene mixed system as the extractant, 1-4 levels of countercurrent extraction are achieved through the centrifugal extractor, the copper extraction rate is as high as more than 98%, and other metal elements are effectively separated at the same time.
2.Washing process: Using tap water as a detergent, 1-4 levels of countercurrent washing are completed in the CWL-M centrifugal extractor to ensure the purity of the organic phase and provide guarantees for subsequent processes.
3.Stripping process: Using dilute sulfuric acid as a stripping agent, 1-4 levels of countercurrent stripping are performed through the CWL-M centrifugal extractor, and finally a copper-rich solution with a concentration of 45-55g/L is obtained, which can be directly used for electrolytic copper production.
Advantages of Centrifugal Extraction Technology
Compared with traditional processes, Tiei Extraction's centrifugal extraction technology has significant advantages:
1.High recovery rate: copper recovery rate is increased to more than 98%, which is much higher than traditional processes
2.High product purity: the final electrolytic copper product has extremely low impurity content, and the added value is greatly increased
3.Low operating cost: the organic phase can be recycled, the auxiliary material consumption is small, and the overall cost is reduced
4.Safety and environmental protection: avoid the generation of toxic gases, simple wastewater treatment, and achieve clean production
5.Small footprint: compact equipment, high level efficiency, suitable for the transformation and upgrading of existing production lines
Successful Application Cases
Centrifugal extraction technology has been successfully applied in many large smelting enterprises. A company used this process to treat ash leachate containing 6.97g/L copper. After three-stage countercurrent extraction, the copper content of the raffinate was reduced to 0.15g/L, and the copper recovery rate reached 98.8%. After stripping, 48g/L of copper-rich solution was obtained, and high-quality cathode copper was obtained by electrolysis, creating significant economic benefits. Another company treated a high-concentration leachate containing 12.76g/L copper. Through four-stage countercurrent extraction, the copper recovery rate was maintained at 98.5%, and finally a 53.85g/L copper-rich solution was obtained, verifying the wide adaptability of the technology to different concentrations of feed liquid.
Zhengzhou Tiei Extraction Technology Co., Ltd. has always been committed to providing customers with the most advanced liquid-liquid extraction and separation technology solutions. Our professional technical team can provide a full range of services from extraction process design, equipment selection to installation and commissioning according to the specific conditions of different enterprises.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820
