Split-thickness Layer of Vanadium-titanium Magnetite Ore Sintering Process
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摘要: 根据承钢钒钛磁铁矿的特点和实际烧结生产情况,对不同料层厚度(常规烧结、酸碱混合烧结)的分流制粒烧结工艺进行研究。结果表明:料层厚度为1 000 mm时的酸碱混合烧结与常规烧结(600 mm)相比,烧结矿质量提高很多,尤其是低温还原粉化指标有很大改善;钒钛磁铁矿厚料层分流制粒酸碱混合烧结矿一方面具有明显的高碱度烧结矿和类似酸性球团的两种显微结构,另一方面酸碱混合烧结矿中的赤铁矿含量降低,并且大部分独立存在于酸性球中。显微结构中高碱度烧结矿的磁铁矿含量提高,黏结相铁酸钙的含量明显增加,钙钛矿含量减少。Abstract: Base on the characteristics of Cheng Steel vanadium titanium ore and actual production conditions,the shunt granulating sintering process under different material layer thickness conditions （conventional sintering,acid mixed sintered） had been investigated. Compared with conventional sinter （600mm）,when the material layer thickness is 1 000 mm,acid mixed sintering improves the sinter quality,especially RDI index. The resulting sinter by shunt granulating thicker layer of vanadium titanium ore features the typical structures of both high basicity sinter and acid pellets. On the other hand,the acid mixed sinter has a decreasing content of hematite,most of which independently existing in acidic ball.For the high basicity sinter existing in the resulting sinter microstructure,it has a higher content of magnetite and remarkable amount of binder phase acid calcium,while perovskite content decreases.
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Key words:
- vanadium-titanium magnetite /
- sintering /
- shunt granulating /
- thick layer /
- mineral composition /
- microscopic structure
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