摘要
本文采用微型烧结、矿相分析等方式研究了4种典型富矿粉的吸液特性及其吸液特性对烧结体固结强度的影响。研究结果表明:在1 280℃、以配加质量分数为15%CaO的Fe2O_(3)试剂作为黏附粉、典型富矿粉粗颗粒作为核颗粒条件下,各铁矿粉吸液深度差异很大;褐铁矿因其结构疏松吸液深度最大,其有效液相流动性最小,而致密赤铁矿吸液深度小,其有效液相流动性大;同时,不同铁矿粉核颗粒烧结体的固结强度随着核颗粒吸液深度的增加而降低,随着有效液相流动性的增加而升高。试验结果通过单种矿烧结杯试验得到进一步验证。实际生产中可采取合理配矿或优化烧结工艺的方式抑制强吸液性矿种的负面影响,从而提高烧结矿的固结强度。
The liquid absorption characteristics of four typical rich ore powders and their effects on the consolidation strength of sintered bodies are studied by micro sintering,ore phase analysis.The results show that,at 1280℃,the absorption depth of each iron ore powder is very different under the conditions of Fe_(2)O_(3) reagent with 15%CaO as the adresive powder and the coarse particles of typical rich ore powder as the nuclear particles;limonite has the largest liquid absorption depth and the smallest effective liquid phase fluidity due to its loose structure,while dense hematite has a small liquid absorption depth and large effective liquid phase fluidity.At the same time,the consolidation strength of the sintered bodies of different iron ore powder nuclear particles decreases with the increase of the absorption depth of the nuclear particles,and increases with the increase of the effective liquid phase fluidity.The test results are further verified by the single-ore sintering cup test.In actual production,reasonable ore blending or optimizing the sintering process can be adopted to inhibit the negative impact of strong liquid absorption minerals,so as to improve the consolidation strength of sinter.
作者
彭建华
李和平
PENG Jianhua;LI Heping(Iron-making Plant,Shanghai Meishan Iron&Steel Co.,Ltd.,Nanjing 210039,Jiangsu,China;Meigang Technology Center of Baosteel Research Institute,Nanjing 210039,Jiangsu,China)
出处
《烧结球团》
北大核心
2025年第2期38-45,共8页
Sintering and Pelletizing
关键词
铁矿粉
吸液特性
液相流动性
固结强度
iron ore powder
liquid absorption characteristics
liquid phase fluidity
consolidation strength
