Nice Foundry Sand(NFS) is a kind of artificial Foundry sand that is ball-shaped, high heat-resistant,low heat dilating rate.

• 铸宝砂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。