高铬型钒钛磁铁矿烧结试验

在高铬型钒钛磁铁矿基础特性研究的基础上，进行了配矿优化和烧结杯试验，并对烧结产物进行显微分析.结果表明，该矿烧结基本特性差，随着配比的提高，垂直烧结速度和产品转鼓指数下降，成品率和利用系数先升后降.另外，显微结构分析表明，高铬型钒钛烧结矿矿物组成主要有磁铁矿、赤铁矿、钙钛矿、铁酸钙、硅酸二钙和玻璃质.随着该矿配比的提高，烧结矿中铁酸钙、硅酸二钙含量降低，钙钛矿及玻璃相含量增加，液相量不足.因此，在实际生产中，该矿配比宜控制在10%~20%之间.

Sintering Experiments of High-Cr Vanadium and Titanium Magnetite

Considering lack of related technological documentation and detailed researches on ore matching optimization, sintering pot tests and mineralography analysis on the basis of basic sintering characteristics were done in this experiment. The results showed that basic sintering characteristics of high-Cr V-Ti magnetite are relatively poor, vertical sintering speed and tumbling index decreased, the yield and productivity first increased and then decreased with the increase of the addition ratio of high-Cr V-Ti magnetite in sinter feeds. Furthermore the analysis of the microstructure showed that the mineralography structure of the sinter mainly included magnetite, hematite, perovskite, calcium ferrite, dicalcium silicate and glass. With the increase of the proportioning of high-Cr V-Ti magnetite, the content of calcium ferrite and dicalcium silicate decreased, perovskite and glass increased and the liquid phase tended to be insufficient. Thus, the proportioning of high-Cr V-Ti magnetite should be controlled between 10% and 20% for the practical sintering production.