| 摘要 |
PURPOSE:To obtain a marbly artificial stone having fine appearance by adding prescribed percentages of SiO2, alkali metal oxides, a colorant and a crystallizing nuclear agent to blast furnace slag and heat-treating them under prescribed conditions. CONSTITUTION:SiO2 and alkali metal oxides are added to blast furnace slag so as to obtain a compsn. contg. 60-75wt.% SiO2 and 15-22wt.% alkali metal oxides. A colorant is then added by 0.01-10wt.%, a crystallizing nuclear agent is further added by 0.1-5wt.% and they are heat-treated at 600-1,100 deg.C for 5min-10hr. The crystallizing nuclear agent is one or more among F2, Cl2, SO3, ZrO2, TiO2 and P2O5. |
