Overview
Blue Carbon Small Material is a processed form of coal with specific particle size requirements, typically under 10mm. It's produced through specialized carbonization processes that enhance its carbon content while reducing volatile matter. This material occupies a niche position between raw coal and premium carbon products like graphite. Industrial users value it for its balance of performance and cost-effectiveness. Unlike larger carbon blocks, the small particle size facilitates uniform mixing and faster reaction rates in metallurgical and chemical processes.
Physical and Chemical Properties
The material typically contains 80-90% fixed carbon with ash content below 10%. Its porous structure provides high surface area, benefiting reactions requiring carbon contact. The electrical resistivity ranges between 0.001-0.01 ohm·m, making it useful in certain conductive applications. Thermal stability is a key characteristic, with the material maintaining structural integrity up to 1500°C in reducing atmospheres. Unlike graphite, it contains some residual hydrogen (1-3%) and oxygen (2-5%), which can influence its reactivity in specific processes.
Main Applications
In ferrosilicon and calcium carbide production, Blue Carbon Small Material serves as an efficient reductant. Its particle size ensures good contact with ore particles while minimizing dust loss. The chemical industry utilizes it as a carbon source for carburizing and in the manufacture of carbon disulfide. Emerging applications include use in lithium-ion battery anode materials (after further processing) and as a soil amendment in agriculture. The construction sector occasionally employs it as a lightweight aggregate in specialty concretes where electrical conductivity is desired.
Safety and Storage
The primary hazard comes from combustible dust, requiring ATEX-compliant handling systems in large-scale operations. Storage silos should incorporate explosion vents, and workplaces must maintain dust concentrations below 10 g/m³. Moisture control is critical - water content above 5% can significantly impact performance in high-temperature applications. Fire protection measures should address the material's self-heating potential when stored in bulk. Unlike raw coal, it doesn't emit significant methane but can slowly react with atmospheric oxygen at elevated temperatures. Nitrogen purging is recommended for long-term storage exceeding six months.
B2B Procurement Guide
Quality specifications should emphasize three key parameters: fixed carbon content (minimum 82%), sulfur content (below 0.8%), and particle size distribution (80% within 3-8mm range). Reputable suppliers provide material safety data sheets (MSDS) with detailed combustion characteristics. Bulk purchases (20+ tons) typically attract 10-15% discounts, but buyers should verify logistics capabilities - the material requires covered transport to prevent moisture absorption. For continuous supply needs, consider establishing framework agreements with penalty clauses for quality deviations. Third-party inspection services are advisable for international shipments.
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