Overview
Primary earthy graphite powder is a naturally occurring form of graphite characterized by its fine particle size and soft, unrefined texture. Unlike flake or crystalline graphite, it lacks a well-defined crystalline structure, giving it an amorphous or 'earthy' appearance. It is mined from deposits where graphite is dispersed in clay or rock matrices. This material is valued for its balance of affordability and performance, serving as a cost-effective alternative to higher-grade graphite in many industrial applications. Its production involves crushing, grinding, and sometimes chemical purification to achieve desired particle sizes and carbon content.
Physical and Chemical Properties
Primary earthy graphite powder exhibits unique properties due to its microstructure. It has a lower density compared to crystalline graphite, typically ranging between 2.09-2.23 g/cm³. The particles are irregularly shaped, contributing to better compaction in applications like refractory bricks. Chemically, it shares graphite's inherent stability, resisting most acids, alkalis, and solvents. Its thermal conductivity (approximately 25-50 W/m·K) and electrical conductivity vary with purity. The material's lubricity stems from its layered carbon structure, allowing easy shear between planes. Unlike synthetic graphite, earthy graphite often contains mineral impurities (e.g., silica, alumina), which may affect performance in precision applications.
Main Applications
In lubricants, primary earthy graphite powder serves as a dry lubricant for high-temperature environments where oils would degrade. It's blended into greases for heavy machinery and used in anti-seize compounds. The refractory industry accounts for nearly 40% of consumption, utilizing its thermal shock resistance in furnace linings and crucibles. Battery manufacturers employ it in anode materials for lead-acid and some lithium-ion batteries due to its conductive network-forming ability. Foundries apply it as a mold wash to improve casting surface finish. Other uses include brake linings, pencil cores, and as a conductivity enhancer in plastics and coatings. Recent developments explore its role in graphene precursor materials.
Safety and Storage
While graphite powder is generally non-toxic, prolonged inhalation of fine particles may cause respiratory irritation. Facilities should implement dust control measures like local exhaust ventilation and provide NIOSH-approved particulate respirators for workers handling bulk quantities. Storage requires protection from moisture to prevent caking and oxidation. Bulk bags or lined steel drums are preferred containers. The material is combustible at high temperatures but poses minimal fire risk under normal conditions. Spills should be cleaned with vacuum systems rather than brooms to minimize dust generation. Compatibility issues arise with strong oxidizers like chlorates or nitrates, which can form explosive mixtures.
B2B Procurement Guide
Industrial buyers should specify carbon content (typically 70-85% for primary earthy grade), with premium prices for ≥80% purity. Particle size distribution is critical—common ranges are 100 mesh (149 μm) to 325 mesh (44 μm). Moisture content below 0.5% is preferred for most applications. Reliable suppliers provide technical datasheets with ash content, volatile matter, and sieve analysis. Bulk purchases (20+ metric tons) often qualify for tiered pricing. Consider regional logistics; Chinese producers dominate supply, but transportation costs may favor local distributors for small orders. Request samples for performance testing in your specific application before large-scale procurement.
Related Manufacturers
- 主营：鱼缸砂、夜光石、路面石、80目石墨粉多少钱、火山石、鹅卵石、雨花石、洗米石、水洗石、机制石子、水磨石子、胶粘石、石英砂、烘干砂、保温砂、砂浆砂、金刚砂、白沙子、蛭石、荧光粉、天然彩砂、染色彩砂、金刚砂地坪料、透水石子、水刷石石子
- 主营：中华麦饭石、石英砂、石英粉、石墨粉厂家、水洗无烟煤、石墨、煤粉、营养土园艺绿化土、高岭土、膨润土、硅藻土、活性白土、远红外粉、电气石、火山石、沸石、粉煤灰、矿粉、炭黑、彩砂、活性炭、水处理磁粉、重晶石粉、碳酸钙、重钙轻钙、鹅卵石
- 主营：石墨烯、石墨板、膨胀石墨、石墨粉、高纯石墨、等静压石墨、石墨棒、石墨纸、石墨模具、石墨换热器、石墨管、石墨乳、石墨矿、石墨环、石墨设备、石墨坩埚、石墨块、石墨柱、石墨粒、石墨舟、石墨套、石墨螺丝、石墨片、增碳剂、鳞片石墨
- 主营：接地模块、降阻剂、石墨基柔性接地体、石墨粉、电解离子接地极、放热焊接模具、铜包钢扁钢、铜包钢圆线、铜包钢接地棒、放热焊接焊粉、接地引出装置
- 主营：铜包钢接地棒、铜包钢圆钢、铜包钢绞线、石墨粉、铜包钢扁钢、接地模块、放热焊粉、离子接地极、铜包钢角钢、降阻剂、铜包钢、覆铜扁钢、铜包钢扁铁、离子接地棒、覆铜圆钢、防雷材料
- 主营：石墨粉、收购二手、回收石墨、石墨电极
- 主营：分散剂、硅溶胶、分散染料、石墨粉、表面活性剂、可膨胀石墨、油墨稀释剂
- 主营：石墨、膨胀石墨、防静电墨粉、导电石墨粉、阻燃石墨粉、鳞片石墨粉、超细石墨粉、云母、云母片、茶色云母片、云母粉、电气石、电气石粉、电气石颗粒
- 主营：石英砂、麦饭石、无烟煤滤料、石墨粉、鹅卵石、石灰石、粉煤灰、蛭石、过滤滤材、火山石、叶腊石
- 主营：润滑剂、细粉石墨、密封胶条、石墨粉、超细石墨、高纯石墨、煅烧高岭土、耐火泥造纸、润滑石墨铅粉、合成氟金云母粉、高岭土、种子包衣粉、麦饭石粉、白色电气石粉、远红外粉
- 主营：石油焦、碳素、冶金焦、石墨粉、石墨、石墨颗粒
- 主营：滑石粉、重钙粉、石英砂、土状石墨粉、雪花白砂
- 主营：海泡石、蛭石、云母、石墨粉、石油焦、石墨颗粒、焦炭
- 主营：超细硅酸铝粉、硅藻土、膨润土、石墨粉、高岭土、滑石粉、彩砂、透明粉、白炭黑、金刚砂、石墨、海泡石、木粉、轻钙、重钙、玻璃粉、贝壳粉、凹凸棒土、玻璃鳞片、陶土、铝矾土、火山岩、电气石粉、合成云母、赤铁粉
- 主营：鳞片石墨、可膨胀石墨、土状石墨、石墨粉、铁粉、钢砂、硅藻土、膨润土、铁砂、玻璃微珠、莫来砂、蒙脱石粉
- 主营：鹅卵石、水洗石、荧光石、石墨粉、石英砂、金刚砂、滑石粉、火山石、砾石、石子、白沙子