A study of pre-briquetting granulation sintering of the mixtures with high ratio of Brazilian specularite concentrate. (25th November 2016)

• Record Type: Journal Article
• Authors: Zhu, D.; Guo, Z.; Pan, J.; Zhang, F.
• Is Part Of: Ironmaking & steelmaking. Volume 43:Number 10(2016)
• Page Start: 721
• Page End: 729
• Publication Date: 2016-11-25
• Subjects: Specularite -- Pre-briquetting -- Sinter -- Metallurgical performance -- Pre-treat of concentrate; Iron industry and trade -- Periodicals; Steel industry and trade -- Periodicals; 669.1
• DOI: 10.1080/03019233.2016.1219542
• Languages: English
• ISSNs: 0301-9233

Abstract

Abstract : In the paper, the pre-treatment of fine Brazilian specularite concentrates with high iron grade and low impurities through pre-briquetting was proposed to improve the granulation and sintering performance of blends comprising some 30% specularite concentrates. The results show that the excellent sintering indexes are attained as follows in pot tests: productivity of 1.64 t m −2 h −1, tumble index of 59.87% and solid fuel consumption of 71.64 kg t −1 under the optimal conditions. Compared with traditional sintering process, productivity and tumble index were increased by 13.88 and 3.5%, respectively, and solid fuel consumption decreased by 4.82 kg t −1 . The RI and RDI−3.15 reach 83.95 and 35.02%, respectively, which are superior for blast furnace. The mechanism of the pre-treatment of the specularite concentrates was demonstrated that better permeability was achieved by coarsening granule, more calcium ferrite was formed by basicity segregation and separation addition of coke.