产品特性及主要指标标准值
Product Characteristic & Standard of Major Technology Parameter
铸宝砂(NFS CERAMSITE = Nice Foundry Sand)是对熔融状态下的高氧化铝质的原料（铝矾土）进行喷雾处理，使之再结晶而得到的高耐热性，低热膨胀，球状人工铸造砂。铸宝砂(NFS)系列铸造陶粒砂产品在性价比上优于铬铁矿砂、锆英砂，为铸造行 业提高铸件质量，降低成本，减少污染开辟了有效途径。是目前世界上较为理想的新型铸造用砂,具有广阔的发展前景。
Nice Foundry Sand (NFS CERAMSITE) is a kind of a new artificial Foundry sand that is ball-shaped, high heat-resistant, low heat dilating rate. NFS has advantage of cost and performance than Chromite sand and zircon sand that provide the effective ways to increase improve the quality of the foundry, cost-down and less damage to the environment. It is the best selection to put the NFS into use in the field foundry and has good vision of development.
一．铸宝砂铸造陶粒主要技术指标
1、主要化学成分：
Al2O3 ≥75% Fe2O3 ≤5% Tio2 ≤5% SiO2 5%-20% 其它：微量
2、粒形：球形
3、角形系数：≤1.1 极似球状
4、密度（堆集密度）：1.95-2.05(g/cm3)
5、耐火度：≥1790℃
6、热膨胀率：0.13%（1000℃加热10分钟）
Ⅰ. NFS Major chemical element and physical parameter
1. Main Chemical element:
Al2O3≥75% , Fe2O3≤5%, Tio2≤5%, SiO2 5%-20%, Else: Tittle.
2. Shape: Ball Shape
3. Angle Factor: ≤ 1.1, very close to ball
4. Bulk Density: 1.95-2.05 (g/cm3)
5. Refractoriness: ≥1790℃
6.Thermal expansion : 0.13%（10 minutes at 1000℃）
二．铸宝砂铸造陶粒具有如下优点
1. 球状粒形
粒形接近真圆，表面光滑，无凹凸脉纹。其流动性及填充性好，能得到良好的成型性和铸模强度。溃散性好，易于清砂作业。粘结剂使用量较其他同类型砂有较大的节省。
2. 热膨胀率低
热膨胀率之低于铬矿砂等特殊砂相同，所以，生产铸件的尺寸精度高，破裂及表面缺陷少，铸件成品率高。
3. 耐破碎性好
铸宝砂的致密性好，强度高，即使重复再生使用也很少破碎，减少铸造生产过程中的粉尘对生产环境的污染，再生性好，减少产业废物排放，利于环境保护。
4. 耐火性好
主要成分是氧化铝，所以耐火性能很好。耐火度≥1790℃能满足铸造各种金属及合金。
Ⅱ. NFS CERAMSITE Features namely advantages as follows
1. Round solid Ball shape: The shape is mostly close to ball with smooth surface and lower specific surface area. And NFS has very good air permeability good liquidity and easy to fill that can make the surface perfect when founded. Further more; NFS can flow very easily and easy to clean. The less felting liquid can be used than other sand when using NFS.
2. Lower thermal expansion rate and thermal conductivity: It is just this characteristic that makes the foundry more precisely, less cracking and high output. Improve foundry quality.
3. Lower cleavage breakage rate: NFS has high density and has very low cleavage breakage rate. Easily reclaimed that makes it more protect environment for the less sand powder occurred.
4. High refractoriness and service temperature: Major element is Al2O3 that has very good refractoriness. The service temperature is beyond 1790℃ that can make it possible to found most of the metal fares.
三．铸宝砂各规格的粒度分布
Ⅲ. NFS Major Particle sizes distribution:
The distribution specification can be designed according customer’s specific requirement.
Spec 10 14 20 30 40 50 70 100 140 200 270 Pan AFS Range
1700 1180 850 600 425 300 212 150 106 75 53 Pan
200# ≤5 10-30 30-50 15-35 ≤5 15-25
300# ≤10 25-45 35-55 5-15 ≤5 ≤2 25-29
400# ≤10 25-45 20-40 15-25 ≤7 ≤5 35-39
500# ≤3 15-25 25-40 25-45 10-20 ≤10 ≤5 45-55
600# ≤10 10-30 30-50 15-35 0-20 ≤5 ≤2 ≤1 55-65
650# ≤8 10-25 20-40 20-40 ≤15 ≤7 ≤2 ≤1 60-70
750# ≤10 5-25 25-45 20-40 ≤15 ≤5 ≤2 75-85
1000# ≤3 10-30 35-55 15-35 ≤10 ≤5 105-115
1250# ≤2 0-20 30-50 25-45 0-20 ≤8 125-135
1500# ≤5 5-25 40-60 25-40 ≤15 160-170