铬砂厂家供应南非洛矿砂40-70目
铬砂厂家供应南非洛矿砂40-70目以 Cr₂O₃≥46%，SiO2≤1% 为核心指标，颗粒圆整、流动性佳，兼具高耐火度、高热导率与低膨胀特性。它耐高温、抗钢水侵蚀，能快速激冷金属液，有效防止铸件粘砂与热裂，提升铸品表面质量。该粒度适配性强，主要用作大型铸钢件面砂、精密铸造制壳材料，也是钢厂钢包引流砂的优质原料。其化学惰性好、杂质低，可保障连铸开浇稳定，广泛用于高锰钢、碳钢等高端铸件生产。
PRODUCT/产品: Chromite Sand 40-70#（AFS40-45）/铬矿砂40-70目/洛矿砂40-70目
FEATURE/特性：比重高、激冷、耐火温度高、导热性能优良、防粘砂、流动性好、抗钢水侵蚀性优异。
CHEMICAL COMPOSITION/化学成分:
| Item | Guarantee Value/保证值（%） | Typical Value/典型值（%） |
| Cr2O3 | ≥46.0 | 46.42 |
| SiO2 | ≤1.0 | 0.86 |
| Fe2O3 | ≤27.5 | 26.9 |
| Al2O3 | ≤15.5 | 15.2 |
| MgO | ≤10.0 | 9.4 |
| CaO | ≤0.3 | 0.2 |
| P | ≤0.003 | / |
| S | ≤0.003 | / |
| Soil content/含泥量 | ≤0.1 | / |
| Moisture/水分含量 | ≤0.1 | / |
| L.O.I/烧失量 | ≤0.5 | / |
PHYSICAL PROPERTIES/物理指标:
| Formula/化学式 | (Fe,Mg)Cr2O4 |
| CAS NO./CAS号 | 1308-38-9 |
| Specific Weight/比重 | 4.0-4.8 g/ cm3 |
| Hardness/硬度 | 5.5-6.0Mohs scale |
| Sintering point/烧结温度 | ＞1800℃ |
| Melting Point/熔点 | 2180℃ |
| PH值 | 7-9 |
| Acid demand value/酸耗值(ADV) | ≤5ML |
| Thermal expansion/热膨胀率(1000℃) | 0.6% |
| Thermal conductivity/导热系数 | 0.63 W/M·K |
PARTICLE SIZE DISTRIBUTION/粒度分布:
| Mesh#目数 | Mesh size(um)筛网尺寸 | Typical Value(%)典型值 |
| +40 | 425 | 23.3 |
| +50 | 300 | 45.4 |
| +70 | 212 | 18.1 |
| +100 | 150 | 12.0 |
| -100 | 150 | 1.1 |
| AFS细度值 | 43.74 | |
APPLICATIONS/用途：
- Surface sand and molding sand used in sand casting, no-bake sand, water glass resin sand and other casting processes./ 型砂铸造、呋喃树脂自硬砂、水玻璃树脂砂等铸造工艺的面砂和型砂。
- Resin coated casting sand./ 覆膜砂铸造。
- Core moulding sand./ 壳型铸造的芯砂。
- Foundry sand for heavy thick-walled castings, high manganese steel with high pouring temperature, and alloy steel castings./大型厚壁铸件、浇注温度高的高锰钢、合金钢铸件的铸造砂。
- Moulding sand and core sand for small and medium-sized castings such as stainless steel, carbon steel, high chromium carbon steel, and manganese steel./不锈钢、碳钢、高铬碳钢、锰钢等中小型铸件的型砂和芯砂。
- Raw material Well filer sand of ladle nozzle./钢水包水口的引流砂。
- Refractory aggregate./耐火骨料。
PACKAGE/包装：
1Ton/Jumbo bag/1吨/吨包
