Overview
High-purity hematite for casting is a specialized form of iron oxide (Fe₂O₃) processed to meet stringent foundry requirements. Unlike standard iron ores, this material undergoes beneficiation to achieve exceptionally low levels of silica, alumina, and other impurities that could compromise casting quality. This premium-grade hematite serves as an essential material in metal casting operations, particularly for producing dimensionally stable molds and cores. Its consistent composition makes it ideal for precision casting applications where impurity-related defects must be minimized.
Physical and Chemical Properties
The material exhibits characteristic hematite properties with enhanced purity metrics. Its crystalline structure provides excellent refractoriness, maintaining stability at typical casting temperatures up to 1500°C. The reddish coloration indicates high iron content and minimal contamination from other mineral phases. Key distinctions from standard hematite include tighter particle size control (typically 100-300 mesh) and superior chemical consistency. The low phosphorus and sulfur content (<0.01% each) prevents gas formation during casting, while controlled trace elements ensure predictable thermal expansion behavior.
Main Applications
Primary use involves foundry mold and core coatings, where hematite's high density and thermal properties improve metal penetration resistance. It's particularly valuable for steel castings requiring smooth surface finishes and minimal sand burn-in defects. Secondary applications include heavy media separation in mineral processing and as a weighting agent in drilling fluids. Some advanced uses incorporate it in refractory linings where its purity prevents unwanted reactions with molten metals at high temperatures.
Safety and Storage
While hematite itself is non-flammable, the fine powder form presents dust explosion risks at sufficient concentrations. Storage areas should have proper ventilation and grounding to prevent static discharge. Moisture-resistant packaging is recommended to prevent caking. Personnel handling bulk material should wear NIOSH-approved respirators for dust protection. Spills should be cleaned promptly with wet methods to minimize airborne particles. The material is generally stable but should be kept away from strong reducing agents.
B2B Procurement Guide
Industrial buyers should specify technical parameters including: Fe₂O₃ content (typically >69%), acid insolubles (<0.7%), loss on ignition (<1%), and particle size distribution. Request certified mill test reports for each shipment. Consider suppliers with dedicated processing lines for foundry-grade materials, as general-purpose hematite may contain unacceptable impurity levels. Bulk shipments (25+ metric tons) typically offer better pricing, but verify storage capacity and turnover rates to prevent material degradation.
Related Manufacturers
- 主营：云母粉 云母碎、铁粉 铁砂 铁矿石、蛭石颗粒、水洗煅烧高岭土、钙基 钠基膨润土、石英沙石英粉、滑石粉、碳酸钙、沸石 沸石粉、火山石、活性白土、硅藻土、灰钙 氢氧化钙、硅灰、五彩石、赤铁粉、氧化钙、仿瓷沙、钾钠长石粉、方解石粉
- 主营：铝矾土、线圈胶泥、感应电炉炉衬、酸性炉衬材料、中性炉衬材料、捣打料、干振料、加热炉浇灌料、硅质打炉料、中间包可塑料、可塑快速修补料、石英砂、中频炉炉衬料、高岭土、透热炉打结料、橡胶颗粒、氢氧化钙、机制木炭、膨润土、绿泥白泥修补料、火山石板材、氧化钙、凹凸棒土粉、沸石粉沸石颗粒
- 主营：轻质碳酸钙、重质碳酸钙、硅灰、膨润土、高岭土、滑石粉、珍珠岩、凹凸棒土、贝壳粉、硅藻土、氧化钙、氢氧化钙、氧化钙颗粒、木质纤维、沸石粉、沸石颗粒、橡胶粉、蛭石、机制木炭、石英砂、白云石、白云石粉
- 主营：耐火浇注料、酸性炉衬材料、高效除渣剂、铝矾土高铝细粉、石墨化增碳剂、透热炉打结料、线圈胶泥、中性炉衬材料、导电粉、中间包可塑料、打炉料、干振料、刚玉炉衬料、硅藻土、电气石托玛琳粉、膨润土、重晶石硫酸钡粉、蛭石、高岭土、橡胶颗粒粉、石英沙石英粉、绿泥白泥修补料、凹凸棒土、重质轻质碳酸钙、雨花石炉料
- 主营：滑石粉、金云母、蛭石片、铸造赤铁粉、鹅卵石、石英砂、杨木粉、胶粘石、膨润土、蛭石粉、高铝粉、水洗沙、萤石粉、木粉60目、30目漂珠、硅藻土、电气石、孵化蛭石、生物质颗粒、贝壳彩片、氧化铁颜料、生铁粉、高岭土、白云母、沸石、漂珠
- 主营：电磁除铁器、磁选机、永磁除铁器、磁滚筒、输送机、防爆除铁器、尾矿回收机、给料机
- 主营：中性炉衬、耐火炉料、酸性打炉料、硅质炉衬料、石英砂捣打料、酸性铸铁炉衬料、透热炉打结料、线圈胶泥红泥、中性打炉料、酸性干振料、线圈浆料红泥、加热炉浇灌料、炉衬材料、捣打料浇注料、铁水包钢水包捣打料、可塑快速修补料、可塑性修补料、硅质打炉料、刚玉干振干捣料、中性炉料、干振料、干打料、打炉料、干捣料、机制木炭果木炭
- 主营：滑石粉、铝矾土、硅藻土、玻璃粉、火山石、稻壳粉、陶瓷涂料、木质纤维、叶蜡石粉、复合岩片、绿沸石粉、莫来石粉、陶瓷用红土、白色沸石粉、造景玻璃珠、重质碳酸钙、高岭土陶瓷油漆、超细沉淀硫酸钡
- 主营：除铁器
- 主营：蛭石、云母、漂珠、硅藻土、膨润土、高岭土、防火涂料、萤石、石英砂、麦饭石、铝矾土、电气石、彩砂、鹅卵石、海泡石、重钙粉、重晶石、木粉、蛭石粉、氧化钙、生物质颗粒、贝壳彩片、莫来砂、蛭石板、沸石粉