How to Recognize High Purity Graphite
high purity graphite is a nonmetallic carbon material with excellent thermal conductivity, strong mechanical strength, corrosion resistance and low electrical resistivity. It is an ideal inorganic nonmetal material used for processing and manufacturing electric heating elements, structural casting molds, crucible boats for smelting high-purity metals, graphite anodes and grids for emission tubes, mercury arc rectifiers, thyristors and other electrical devices.
High quality graphite is mainly produced from coal pitch coke and coal tar pitch through leaching with hydrofluoric acid or caustic soda followed by purification. The Albany project represents the largest and only known'vein-type' graphite deposit under development in Canada and offers a significant opportunity to produce superior natural high purity graphite.
The current process for producing high purity graphite requires a significant amount of energy to heat the carbon material through the calcination and purification process in order to achieve a highly stable, pure product. The Albany project produces a unique form of natural, high purity graphite derived from the rare "vein-type" graphite deposits which are becoming increasingly popular in the global market due to their environmental and performance advantages over synthetic, manufactured graphite.
Currently, the recognition of graphite purity is done manually or through the use of microscopes. This method is expensive and has low recognition accuracy. This paper proposes the application of migration learning and convolution neural network based on image recognition for the recognition of graphite purity, which can greatly reduce the expense of manual analysis and improve the recognition accuracy.
