二元碱度对印尼钒钛矿烧结过程及烧结矿质量的影响

以典型钢铁企业矿石资源为基础,进行不同碱度条件下配加印尼钒钛矿的烧结试验,考察了二元碱度(R=m(Ca O)/m(Si O2))对该矿烧结过程及烧结矿质量的影响.研究表明:当碱度R由1.4逐渐增至2.3时,烧结有效利用系数由1.63 t/(m2·h)降至1.44 t/(m2·h),烧结矿成品率由78.5%降至75.3%;同时,垂直烧结速度有所上升;烧结矿中w(Fe O)不断下降;转鼓指数先下降而后逐渐回升,并在R=1.7时出现最小值.随着碱度的逐渐增加,低温还原粉化性能和还原性逐渐改善,这有利于高炉上部透气性的改善和间接还原的发展.

Effect of Binary Basicity on Sintering Process and Quality of Indonesia Vanadium Titanium Magnetite

Basing on raw materials conditions of typical iron and steel plant， the sintering experiments were carried out for the Indonesia vanadium titanium magnetite under different basicity and the effect of binary basicity (R=m(CaO)/m(SiO₂)) on the sintering process and sinter′s quality were investigated in this work. The results showed that when the basicity (R) increased from 1.4 to 2.3， the coefficient of sintering effectiveness decreased from 1.63t/(m²·h) to 1.44t/(m²·h) and the rate of finished products after sintering decreased from 78.5% to 75.3%. Meanwhile， with the increasing of basicity， the vertical sintering speed increased gradually and the w(FeO) decreased constantly. Moreover， with the increasing of basicity from 1.4 to the 2.3， the drum index firstly dropped to the lowest value at the basicity of 1.7 and then rose gradually. With the increase of basicity， both the reduction degradation index (RDI) and reducibility index (RI) could be improved， which help to develop the gas permeability at the top of the furnace and the indirect reduction ability.