钒钛磁铁矿的复合造块新工艺

Vanadium-Titanium Magnetite Concentrates by Composite Agglomeration Process

钒钛磁铁精粉具有TiO2含量高、SiO2含量低等特点，由此生产的烧结矿转鼓强度差，低温还原粉化严重。为了保证烧结矿获得足够高的强度，必须生产高碱度甚至超高碱度烧结矿，但对于承钢而言，酸性炉料供应短缺、价格高迫使烧结矿碱度为2．0～2．3，提高烧结矿的质量存在很大困难。提出了一种铁矿粉造块新工艺，即复合造块工艺，论述了该工艺在技术上的可行性，并与常规烧结工艺在烧结工艺参数、烧结矿产质量指标和冶金性能方面进行了对比分析，并对复合块矿进行了显微结构分析，从机制上进一步证明了该工艺的优越性和可行性。

Vanadium-titanium magnetite is characterized by high content of TiO2, low content of SiO2. Therefore, the tum- bler strength and RDI of sinter ARE are poor. In order to ensure a sufficiently high sinter strength, high alkalinity or high basicity sinter must be considered to produce. For Chenggang Steel, because of shortages and high prices of acidic charge, sinter＇ s basicity is higher to the range of 2.0 to 2.3, and the quality of sinter is very difficult to improve. A new sintering process called iron ore composite agglomeration process was presented and discussed in detail the technical feasibility of the process. Sintering process parameters, sinter quality indicators and metallurgical properties was compared. Finally, the microstructure of composite lump ore was investigated. The results show the superiority of this new process.