ORAL
| SESSION: AdvancedMaterialsTueAM-R6 | Marquis International Symposium on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development(3rd Intl Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development) |
| Tue Oct, 24 2017 | Room: Condesa IA |
| Session Chairs: Yail Jimmy Kim; Sandra E. Rodil; Session Monitor: TBA |
16:00: [AdvancedMaterialsTueAM08]
Process of Chemical Stabilization and Mechanical Improvement of Slag through CO2 Capture Erivelto
Souza1 ; Orimar
Reis
2 ; Higor
Coelho
1 ; Leandro
Duarte
1 ; Tales
Oliveira
1 ; Denise
Pereira
3 ; Walinton
Sousa
1 ; Reimar
Lourenco
1 ;
1Universidade Federal de Sao Joao Del-Rei, Ouro Branco, Brazil;
2Instituto Federal de Minas Gerais, Ouro Preto, Brazil;
3UNIPAC - Conselheiro Lafaiete, Conselheiro Lafaiete, Brazil;
Paper Id: 115
[Abstract] Metallurgy is one of the most important sciences developed by mankind, the steel industry is, in turn, the most important technique practiced within metallurgy. In order to produce the steel, for a long time, the objective products were generated, but also the process residues, which were discarded succinctly. With the evolution of the recycling processes, several of these residual materials became commercial use, as is the case of blast furnace slag. However, slags from steel mill processes, because of their high free CaO content, still had direct use restrictions. What is proposed here is a process that treats steel slag through a recomposition of this free CaO, leading it to become a calcium carbonate. Blast furnace slag is used for various processes where its chemical stability and mechanical strength is critical. The steel slag presents chemical instability, because, due to its high degree of hydration, this slag undergoes expansion and becomes mechanically weak, by the transformation of free CaO into Ca(OH)2. By means of this change the slag happens to present a better mechanical property, and no longer becomes susceptible to expansion by hydration. Associated with this advantage is the fact that each ton of processed slag allows to recover, on average, 136 kg of CO2 of the gases generated by the company itself. Thus, in addition to improving the properties of this specific steel residue, the process also allows a carbon capture of the generated gases.
