Overview
High-calorific metallurgical coke is a premium-grade carbon material produced by destructive distillation of select bituminous coals in coke ovens. It serves as both a fuel and reducing agent in blast furnaces, where its high heat output (typically 28–32 MJ/kg) and structural stability are critical for efficient iron ore smelting. Unlike lower-grade cokes, it minimizes impurities that could compromise metal quality. The production process involves heating coal to ~1100°C in oxygen-deficient chambers, driving off volatile compounds to leave a porous carbon matrix. Strict quality control ensures consistent calorific value and chemical composition, making it indispensable for modern steelmaking.
Physical and Chemical Properties
This coke variant exhibits a unique combination of high fixed carbon (85–90%) and low reactive ash (typically under 12%), which directly correlates with its energy efficiency. Its porosity (50–60% void space) enables optimal gas flow in furnaces while maintaining compressive strength above 15 MPa to withstand burden pressure. Chemically, it contains minimal sulfur (<0.8%) and phosphorus (<0.05%), preventing contamination of molten iron. The high carbon content ensures clean combustion with minimal smoke, and its electrical resistivity makes it suitable for electrode manufacturing. Thermal stability allows sustained performance at temperatures exceeding 2000°C in furnace environments.
Main Applications
The primary use is in blast furnace ironmaking, where each ton of pig iron requires 300–450 kg of metallurgical coke. It provides the necessary heat (reaching 1900°C in combustion zones) and generates carbon monoxide for iron oxide reduction. Foundries also rely on it for cupola furnaces to produce cast iron with uniform properties. Secondary applications include non-ferrous metal smelting (e.g., lead, copper) and calcium carbide production. Recent innovations explore its use in carbon anodes for aluminum electrolysis and as a carburizing agent in steel treatment. The aerospace sector values ultra-high-purity grades for carbon composite production.
Safety and Storage
As a combustible solid, coke piles require isolation from open flames and sparks, with minimum 10-meter clearance between stacks. Spontaneous combustion is rare but possible with fine particles; moisture control below 5% prevents exothermic reactions. Storage areas need windbreaks to minimize dust emissions. Workers handling bulk material should wear NIOSH-approved respirators (N95 or higher) to avoid pulmonary irritation from particulate matter. Static electricity risks during transport necessitate grounded equipment. First aid measures include eye flushing with water for dust exposure and medical evaluation for prolonged inhalation incidents.
B2B Procurement Guide
Industrial buyers should specify these parameters: calorific value (>30 MJ/kg), ash content (<10%), sulfur levels (<0.7%), and CSR (Coke Strength after Reaction) >60% for blast furnace use. Order test certificates from ISO 17025-accredited labs for each batch. Logistics planning must account for bulk density (0.85–1 t/m³) to optimize transport costs. Consider FOB contracts from major producers in China, Poland, or Australia, with INCOTERMS clarifying moisture adjustments. For long-term contracts, price indexing to coking coal markets provides stability. Audit suppliers for coke oven battery emissions compliance to meet ESG standards.
Related Manufacturers
- 主营：铁砂铁粉、滑石粉、硅藻土、高岭土、赤铁红、红土黄土、沸石粉、木粉、重钙、轻钙、磁粉、膨润土、锰砂、硅灰、活性白土、石英粉、萤石粉、重晶石粉、莫来砂、珍珠岩粉、粉煤灰、白水泥、远红外粉
- 主营：石油焦、石墨粉、膨胀石墨、高碳低硫、海泡石、矿物纤维、云母、蛭石、橡胶颗粒、轮胎粉、漂珠、重晶石、膨润土、碳酸钙、叶腊石、人造石墨、鳞片石墨、木质纤维、喷涂棉、钾长石、氧化铝、铝矾土、滑石粉、配重砂、硅藻土
- 主营：海泡石纤维、石油焦、蛭石、冶金焦、高岭土、云母、矿物纤维、无石棉纤维、煅烧焦炭粉、增碳剂、漂珠、氧化铝粉、海泡石粉、人造石墨、石墨颗粒、沸石粉、硅藻土、橡胶颗粒、轮胎粉、硅酸铝纤维、煅烧石油焦、石墨粉、玻化微珠
- 主营：钛白粉、金刚砂、鹅卵石、高岭土、萤石粉、赤铁粉、空心漂珠、负离子球、重晶石粉、纤维喷涂棉、导电云母粉、海泡石纤维、晶体电气石、滑石粉、焦炭、金刚砂地坪料、合成云母粉、面包铁、灰漂珠、石英粉、氧化铁颜料、酞菁颜料、硅灰石粉、氧化钍、导电粉
- 主营：增碳剂、煅烧焦、石墨化焦、高温石墨增碳剂、摩擦材料焦炭粉、摩擦材料合成石墨、沥青焦、球铁增碳剂、灰铁增碳剂、石墨增碳剂、半石墨增碳剂、负极用石油焦、负极用针状焦、特碳用沥青焦、针状焦、铸造增碳剂、煅后石油焦、负极用沥青焦、负极材料电阻料、负极材料用保温料
- 主营：增碳剂、全石墨化石油焦、石墨、冶金焦、石油焦、天然石墨、人造石墨、定制石墨石油焦
- 主营：除渣剂、焦碳粉、焦炭粉、石油焦粉、铸造焦炭、无烟煤粉、石墨润滑剂、三八块焦碳、椰壳活性炭
- 主营：硅藻土、碳酸钙、铁砂、高岭土、煅烧高岭土、金刚砂、铁粉、氢氧化钙、氧化钙、滑石粉、煅烧滑石粉、膨润土、黄土红土、硅灰、活性白土、石英粉、沸石粉、莫来砂、珍珠岩粉、贝壳粉、凹凸棒土、远红外粉、玻璃粉、萤石粉
- 主营：水磨石、石英粉、火山石、冶金焦、铸造砂、目海沙、水洗石、鹅卵石、雪花白、分母沙、黑石子、珊瑚石、石英砂、精抛光、白卵石、养生沙、玻璃珠、绘画石、雨花石、白沙子、白碎石、烘干沙、砂涂料、玻璃砂、碎玻璃、白石子
- 主营：干熄焦、焦炭、焦粉、冶金焦、石油焦、增碳剂、石墨
- 主营：无烟煤、石墨粉、除渣剂、增碳剂、赤铁粉
- 主营：焦炭、焦炭颗粒、活性炭、柱状活性炭
- 主营：星光煤炭、砌筑砂浆、建筑材料
- 主营：喷砂服、抛丸砂、棕刚玉、金刚砂、白刚玉、合金钢砂、绿碳化硅、冶炼焦炭、钢砂配件、喷砂磨料、防护手套、碳化硅微粉、喷砂机配件、304不锈钢丸、三八块焦炭、果壳颗粒滤料、耐磨橡胶履带、合金铸造钢丸、耐磨橡胶漏沙板、玻璃研磨抛光丸、净化水质核桃壳
- 主营：中华麦饭石、石英砂、石英粉、高岭土、水洗无烟煤、石墨、煤粉、营养土园艺绿化土、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