Graphite, graphite resources, mineral beneficiation, production of spherical graphite/ graphene for battery production
3. Processing, Production and Remanufacturing
Flotation devices such as “Jameson flotation cell” and “Concorde cell” offer significant potential for the fine grained graphite enrichment. Very fine air bubbles can be obtained by both type of cells and the hydrodynamic characteristics of them improve bubble and micro size particle collision efficiency. There is no implementation of Concorde cell in mineral separation industry since its invention in 2011. While Jameson cell has many implementations in Australia, USA and South America, there are only two applications within EU due to lack of knowledge. Both methods have tremendous potential for the separation of graphite from the gangues.
On contrary to general trend for raw material selection, here we propose preparation of "spherical graphite" from amorphous graphite. After the acid treatment process, purified materials will further be modified by cold graphene oxidation process followed by mechanical process for spherification. The final step will be the coating with carbon (glucose technique), and/or NiCoO2 (sol-gel) to obtain highly active product.
In our research group, we will use Jameson flotation cell technique for preparing fine grained graphite. Here we are seeking a partner/partners with an experience /or capable of preparing fine grained graphite by Condorde cell technique. Spherical graphite production and modification of graphites will be performed by each partner. Material characterizations of the samples and electrochemical performance tests of the Li battery cells will be performed at our research group. We are looking for partners to perform below work packages in collaboration.
- Size reduction of graphite prior to flotation process.
- Graphite production by Jameson cell and characterization
- Graphite production by Concorde cell and characterization
- Further refinement by liquid-liquid separation and acid treatment process
- Process development for spherification and carbonization
- Surface Coating of graphite spheres
- Electrochemical performance tests of batteries with produced graphite as anode.
The researchers are from three universities in Turkey: Afyon Kocatepe University (AKU), Dumlupinar University (DU) and Istanbul Technical University (ITU), from Departments of Mineral Processing Engineering and Metallurgical and Materials Engineering.