|
THE RAW WOLLASTONITE ORE
The physical and chemical index (It has been checked by Shanghai Institute of Ceramics.)The
ore of their diggings belong to triclinic wollastonite with the acicular, stringy aggregation. The fine grinding finish
ore still assume acicular stringy crystal. It shines white. The luster likes glass and pearl. The character of our ore is
as follows: Moh's hardness----4.5degree, density---2.8~2.9, refraction index---1.616~1.631, melting point----1480C, Ignition
loss:1-5%,whiteness: 85-90.The oil absorption is 26% in pulverous fettle.
The main chemical components:
| CaSiO4 65~95% SiO2 40~52% CaO 38~48% Fe2O3,0.2~0.4% | | Al2O3
0.1~0.5% LgLoss 0.5~5% | | Micro-MnO2 K2O Na2o TiO2 S P B Cr Ni Cu Zn As Sr Ba Pb Bi
SHANGHAI INSTITUTE OF CERAMICS CHINESE ACADEMY OF SCIENCES |
|
