Spherical graphite (SPG) is ideal for use as a raw material for anodes.
The NETZSCH business unit Grinding & Dispersing and Dorfner ANZAPLAN have joined forces to find a more efficient solution for graphite rounding to overcome the disadvantages of the previously widely used process requiring more than 20 classifier mills installed in rows: In a first step, the flock graphite is pre-ground to the optimum initial particle size for
The increase in efficiency and the advantages which the new process-optimized system offers compared to the previous standard-plant train are impressive: Plant availability has been increased by 30% in comparison to previously used processes as the number of machines and consequently, the probability of breakdown is reduced drastically.
For this reason, maintenance costs are reduced by almost 90% and the compact setup means the plant can be installed in a 60% smaller space. In addition to this, the NETZSCH/Dorfner ANZAPLAN system requires only half the installed power of a plant train while achieving the same production capacity and using 60 % less energy due to its optimized mode of operation.
Product yield is a decisive improvement in the process. By optimizing the design of the grinding chamber and reducing the number of components, it was possible to increase yields of 30 to 40% achieved by the standard system to 60 to 65%. At the same time, using specific settings, it is possible to achieve the maximum yield of the final product with the desired quality. Quality criteria such as distribution width, tap density, and particle size can be influenced by varying the process parameters. In this way, using the newly developed NETZSCH and Dorfner ANZAPLAN GyRho system, all qualities required by the market, such as spherical graphite with a tap density of more than 960 g/l and a d50 value of 16.8 µm (yield based on a raw material volume of > 60 %) are achievable.
Thus, using this process developed by NETZSCH and Dorfner ANZAPLAN, not only a higher plant availability and raw material efficiency are achieved at the same production capacity but also significantly higher product quality. The mentioned improvements result in an approximate 35% reduction of operational costs, demonstrating the technical superiority of this newly developed system solution which has decisively improved the economic efficiency of graphite rounding. In NETZSCH´s well-appointed application laboratory in Hanau, Germany, which forms part of our comprehensive service offer, graphite-rounding tests can be carried out on a laboratory scale and up to a production scale. Material samples are processed under production conditions and their behavior analyzed to achieve the best result at the highest efficiency.
The Business Unit "Grinding & Dispersing" of NETZSCH is one of the world’s market leaders in wet and dry processing technology offering an extensive range of products from laboratory to production sized machines and complete plants. A large number of wet and dry grinding systems are available for different grinding tasks even down to the nanometer ...