Overview
Medium-coarse graphite products are industrial materials derived from natural or synthetic graphite, characterized by a granular structure with particle sizes typically ranging from 0.5 mm to 5 mm. They are valued for their unique combination of thermal and electrical conductivity, chemical stability, and mechanical strength. These products are widely used in high-temperature applications, such as metallurgy and refractory linings, due to their ability to withstand extreme conditions without degradation. Their lubricating properties also make them suitable for use in machinery and molds.
Physical and Chemical Properties
Medium-coarse graphite exhibits a layered crystalline structure, which grants it exceptional thermal conductivity (up to 150 W/m·K) and electrical conductivity. It is chemically inert, resisting attack by most acids, alkalis, and solvents, and can operate in temperatures up to 3,000°C in inert atmospheres. The material's density and porosity vary depending on the manufacturing process. Its granular form provides a balance between surface area and structural integrity, making it ideal for applications requiring both reactivity and durability.
Main Applications
In metallurgy, medium-coarse graphite is used as a lining for furnaces and crucibles, thanks to its high melting point and thermal shock resistance. The electronics industry employs it in battery anodes and conductive coatings. The chemical sector utilizes it as a corrosion-resistant material for reactors and heat exchangers. Additionally, its lubricity makes it a preferred choice for die-casting molds and mechanical seals in heavy machinery.
Safety and Storage
While graphite is generally non-toxic, its dust can pose respiratory hazards if inhaled. Industrial handling requires dust masks, ventilation, and protective clothing to minimize exposure. It should be stored in sealed containers away from strong oxidizers like chlorates or nitrates to prevent combustion risks. Long-term storage in humid environments should be avoided, as moisture can affect the material's performance in certain applications. Fire safety measures are recommended due to graphite's flammability in powdered form.
B2B Procurement Guide
When sourcing medium-coarse graphite, prioritize suppliers that provide detailed specifications, including grain size distribution, fixed carbon content (typically 90–99%), and impurity levels (e.g., ash <1%). Certifications like ISO 9001 ensure consistent quality. Bulk pricing is common for industrial quantities, with discounts for long-term contracts. Consider logistics: graphite's density affects shipping costs. For specialized applications (e.g., nuclear-grade), verify isotopic purity and trace element analysis in supplier documentation.
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