The composite agglomeration process is one of the most potential methods to effectively produce blast furnace burden with vanadium-titanium magnetite. In this work, the effects of V–Ti magnetite particle size, coke breeze ratio of green pellets, coke breeze of pelletized feed, and pelletized feed basicity on quality of CAP products were studied. The results shown that the drop strength and compressive strength of green pellets are improved when the vanadium-titanium magnetite is pretreated by high-pressure grinding roll compared with those prepared from raw material. With the increase of basicity of flux green pellets, the strength of green pellets, the permeability of mixed layer and the sinter yield increase. When the basicity of green pellets is 0.9, the economic and technical indexes of sintering are the best. After finely grinding coke powder for sintering and adding vanadium-titanium magnetite to prepare carbon-containing green pellets, the amount of coke powder should be controlled at about 0.4 mass%, considering the drop strength and compression strength of green pellets,. However, sintering with pellets containing 0.4% coke breeze in the core produces perforated pellets or molten pellets. Therefore, it is not recommended to use coke powder in CAP pellet.

复合烧结工艺是有效生产钒钛磁铁矿高炉炉料的最有潜力的方法之一。本工作研究了V-Ti磁铁矿粒度、生球团焦粉比、球团饲料焦粉和球团饲料碱度对CAP产品质量的影响。结果表明，与原料制备的钒钛磁铁矿相比，高压磨辊预处理钒钛磁铁矿生球团的落下强度和抗压强度有所提高。随着熔剂生球团碱度的增加，生球团的强度、混合层的渗透性和烧结产率增加。当生球团矿碱度为0.9时，烧结经济技术指标最好。将焦粉细磨烧结后加入钒钛磁铁矿制备含碳生球团矿，考虑生球团团落强度和抗压强度，焦粉用量应控制在0.4质量%左右。然而，用芯中含有 0.4% 焦粉的球团烧结会产生穿孔球团或熔融球团。因此，不建议在CAP颗粒中使用焦粉。