ORAL

SESSION: IronMonAM-R10	5th Intl. Symp. on Advanced Sustainable Iron and Steel Making
Mon Oct, 23 2017	Room: Maria Mercedes & Maria Beatriz
Session Chairs: Tateo Usui; Mery-Cecilia Gomez-Marroquin; Session Monitor: TBA

15:00: [IronMonAM06]
Influence of Improvement of the Sinter Screening in CSA Blast Furnace Process
Geovane Silva¹ ; Bruno Pinheiro Da Silva² ; Andre Hirano³ ; Marilene Landin⁴ ; Maxwell Pereira Cangani⁵ ; Ennes Landin⁶ ;⁰ ; ¹Thyssenkrupp CSA, Rio de Janeiro, Brazil; ²ThyssenKrupp CSA, Rio de Janeiro, Brazil; ³ThyssenKrupp, Rio de Janeiro, Brazil; ⁴Thyssenkrupp CSA, Santa Cruz, Brazil; ⁵thyssenkrupp CSA, Rio de Janeiro, Brazil; ⁶, , ;
Paper Id: 317 [Abstract]

One of the main parameters in the gas flow distribution in a Blast Furnace is the size distribution. In the CSA Blast Furnaces, the sinter fines extraction was improved through sieves adjustments in the stock house, and a better gas flow control into the Blast Furnace was observed. In this paper, it is possible to evaluate the influence of the improvement in the sinter screening process in the BF gas flow, and its impact in the reduction of thermal load standard deviation on the wall in the upper part of the Blast Furnace. By BF stable gas flow, an increase in the top gas efficiency and a decrease in the variation of the thermal load on the wall were observed. Fuel rate and Hot Metal production were also improved as a consequence of better gas flow distribution into Blast Furnace.

SESSION: IronMonAM-R10	5th Intl. Symp. on Advanced Sustainable Iron and Steel Making
Mon Oct, 23 2017	Room: Maria Mercedes & Maria Beatriz
Session Chairs: Tateo Usui; Mery-Cecilia Gomez-Marroquin; Session Monitor: TBA

15:30: [IronMonAM07]
Optimization of the Sinter Product Specification CSA and its Impacts in the Blast Furnace Process
Maxwell Pereira Cangani¹ ; Cristiane Galiazzi² ; Geovane Silva³ ; Rafael Pereira² ; ¹thyssenkrupp - Companhia Siderúrgica do Atlântico (CSA), Rio de Janeiro, Brazil; ²thyssenkrupp - Companhia Siderurgica do Atlantico (CSA), Rio de Janeiro, Brazil; ³Thyssenkrupp CSA, Rio de Janeiro, Brazil;
Paper Id: 316 [Abstract]

With the expansion of iron ore production in the iron ore quadrilateral in Minas Gerais, the lithology and the quality profile of the ores have significantly changed in recent years, to the iron ore notably received in the CSA from the second half of 2014. This has generated a strong impact in the Sintering and Blast Furnace processes, and there was a reduction in the share of hematite iron ore and an increase of itabirite iron ore. As a consequence, there was a significant increase of the silica, phosphorus, and alumina contents in the sinter feed and granulated ore. In this context, it is necessary to change the sinter product specification to be more comprehensive qualitatively and more restrictive quantitatively, in order to improve the performance and stability of the Blast Furnaces, in view of the new quality profile of iron ore.