含氟烧结矿黏结相流动性的探讨

针对包钢含氟烧结矿黏结相的流动性进行了试验研究.通过改变黏结相的碱度(w(CaO)/w(SiO2))以及MgO,CaF2和FeO的含量并测得相应黏结相在熔融态下的黏度和表面张力,从而得出烧结矿黏结相物性的一般变化规律.结果表明,碱度为1.4时,黏结相的黏度最小和熔化性温度最低,但表面张力随碱度的升高而增大;适量的MgO能降低黏结相的黏度,而表面张力随MgO含量的增加而增大,当MgO质量分数为5%时,熔化性温度最低;添加CaF2能显著降低黏结相的黏度和表面张力;FeO含量增加,黏结相的黏度和表面张力变小.

Fluidity Discussion on Binding Phase in Fluorine-Containing Sinter

An experimental investigation was done for the physical characteristics of the binding phase in fluorine-containing sinter used in Baotou Steel,especially its fluidity.By readjusting the basicity of the binding phase,i.e.w(CaO)/w(SiO2),and the content of MgO,CaF2 and FeO and measuring the viscosity and surface tension of the as-molten binding phase,the physical changing behavior of the binding phase was found.The results showed that if the basicity is 1.4 the viscosity and melting temperature of binding phase are both the lowest while the surface tension increases with rising basicity.Adding properly the MgO into the sinter can lower the viscosity of binding phase,while the surface tension increases with increasing content of MgO and the melting temperature becomes the lowest if MgO is 5 wt%.Adding CaF2 can obviously decrease the viscosity and surface tension.The viscosity and surface tension decrease with the increasing content of FeO.