I. OUTSTANDING FEATURES OF GRAPHITE
Graphite has many advantages that make it the most widely used in the manufacture of EDM electrodes:
- Easy to process;
- Low coefficient of thermal expansion (3 times lower than copper), helping to ensure stability during electrode machining;
- Shaped in large blocks and plates;
- Not melt but change directly from solid to gas at a temperature of 3400 degrees Celsius;
- Specific gravity is slight, resulting in lighter electrodes;
- Low attrition rate;
- Attrition rate tends to decrease when increasing pulse intensity;
Each year, the amount of graphite consumed worldwide is valued more than $38 million. Graphite industry is dominated by large manufacturers located mainly in China (40% of natural graphite in the world), India, Brazil, Mexico and North Korea.
According to Roskill Market Analysis Company, 2002 average production of natural graphite in the world was about 620 thousand tons / year (maximum annual oscillation is in the range of 15%) and 2004 estimated production was 756 thousand tons globally.
Applications of Graphite:
- Graphite is widely used in the metallurgical, chemical, mechanical, glass industries for the fabrication of molds, crucibles, electrodes and electrical components;
- Graphite plays an important role in medicine, environmental remediation, energy technology and transportation. New and developing applications are the dynamics of graphite growth. Specially, high-quality graphite has the large application potential in the field of conventional batteries and fuel cells. It is forecast that the current short-term need is approximately 12-15 thousand tons / year and may reach 100 thousand tons / year in the long term;
II. PROJECT OF YEN BAI GRAPHITE MINING AND PROCESSING
Currently, the Company is focusing on Project of " YEN BAI GRAPHITE MINING AND PROCESSING". Main products of the project are powdered graphite flakes, obtained from flotation processes with different Mesh sizes and carbon content.
Below is some pictures of the products from Graphite:
A1: ( +180 µm ) & ( C=95% )
A2: ( -180 µm) & ( C=95% )
A3: ( +125 - 180 µm ) & ( C=91% )
A4: ( +170 µm ) & ( C=98% )
A5: ( +250 µm ) & ( C=96% )
A6: ( +125 µm ) & ( C=93% )