How Does the Flotation Process Improve Copper Recovery from Oxidized Ores in Africa?
Copper resources in many African regions, especially Tanzania, Nigeria, and neighboring countries, often occur in oxidized ore formations. Compared with sulfide copper minerals, oxidized copper ores contain chemically bound copper, making them more challenging to recover. However, with the appropriate flotation process, high‑efficiency extraction is achievable — as proven in multiple Dasen Mining Oxide type copper ore processing across Africa.
Working Principle of Copper Ore Flotation
For oxidized copper ore, the process begins by separating valuable minerals such as malachite, azurite, and chrysocolla through flotation reagents that selectively bind to the copper particles.
The key is to create a stable froth phase, allowing copper minerals to attach to air bubbles and float to the surface for collection.
Typical Process Flow:
Crushing → Grinding →Classification→Mixed Flotation→Cleaning → Concentration & Dewatering
This technological route is especially effective for oxide copper ores with grades of 5 – 10 %, such as those currently processed in Tanzania. Laboratory verification showed that flotation can recover most of the copper minerals, although a small amount of oxide copper may remain in the tailings — emphasizing the importance of accurate ore testing before production.
Process Advantages
10 % savings in grinding energy costs
High flotation efficiency and stable performance
20 % reduction in reagent consumption
Wide adaptability to different ore compositions
Improved concentrate purity and production stability
Through this method, a raw ore with 2 – 5 % copper content can typically yield a concentrate grade of 30 % or higher.
Dasen Mining Engineers Recommend beneficiation testing before design to select the optimal reagent combination. Usually, 20 – 30 kg of sample material is sufficient for accurate evaluation. To ensure representative results, it is important that the sample reflects an average ore grade, avoiding both excessively rich and very poor zones.
Project Experience: Field Proven in Tanzania
In Tanzania, Dasen Mining has implemented multiple copper flotation projects where oxide ores dominate the deposit type. Our team delivered complete EPC services — from flotation reagent testing to on‑site equipment installation and operator training — achieving stable recovery performance.
Focus on Magnetic Separation and Local Service in Nigeria
In addition to flotation projects, Dasen Mining has established a fully equipped warehouse in Jos, Nigeria, enabling faster service and equipment supply across West Africa.
This facility specializes in secondary magnetic separation — supporting not only copper production lines but also the processing of ilmenite, monazite, tin, and zircon minerals.
Our warehouse currently includes:
- Three‑disc magnetic separators
- Three‑roll magnetic separators
- Double‑roll magnetic separators
- Bucket elevators and essential auxiliary equipment
Clients in Nigeria can request local demonstrations, technical consultation, and even on‑site project visits to see the equipment in operation.
With over 30 years of mineral processing experience, Dasen Mining continues to help global partners achieve higher recovery, energy savings, and sustainable production across copper, gold, and other ore beneficiation projects.
Contact us today to discuss your flotation or magnetic separation requirements.
Whatsapp:+86 133 1927 7356
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