ORALS
SESSION:
IronTueAM-R2
| Assis International Symposium (9th Intl. Symp. on Advanced Sustainable Iron & Steel Making) |
| Tue. 28 Nov. 2023 / Room: Dreams 2 | |
| Session Chairs: Tateo Usui; Marcos De Campos; Session Monitor: TBA |
12:50: [IronTueAM04] OS Keynote
THE USE OF BIOMASS IN THE STEEL INDUSTRY AS A SUSTAINABLE ALTERNATIVE Gabriela Araujo Gois1 ;
Paulo Assis2 ;
1UFOP/REDEMAT, Ouro Preto/MG, Brazil;
2UFOP, Ouro Preto, Ouro Preto, Brazil;
Paper Id: 115
[Abstract] This work consists of a study of the application of different types of biomass in the steelmaking process, these are the biomasses: Macaúba, soy, corn, elephant grass, sugarcane bagasse and coffee husks, considering that Steelmaking is responsible for 5% of emissions of greenhouse gases (CH4 and CO2). There is an attempt to replace part of the coal in the steelmaking process with biomass, but it is not possible to eliminate it completely because carbon is important in the reduction stage of Blast Furnaces, in addition, biomass needs to undergo processes and treatments that give it the desired characteristics. Biomass is all organic matter used to produce energy, which can be added to coke or injected into blast furnaces. Brazil's biodiversity needs to be used by ours through the incorporation of agribusiness residues into the steel sector. But to improve the calorific potential and decrease the reactivity of the biomass, additives can be added, as well as tar, which act by reducing the porosity of the biomass. In addition, demineralization can be performed to remove the inorganic part of the biomass in order to decrease its reactivity. The pyrolysis of biomass consists of heating the organic material without the presence of oxygen, direct thermal decomposition occurring (500 to 900°C) because when the temperature increases, the volatiles are eliminated, leaving carbon. Torrefaction is carried out at lower temperatures than pyrolysis (around 300°C) and is a technique that reduces the costs of cogeneration power plant because the biomass in this process becomes friable and easy to handle, but the torrefaction problem is that it does not concentrate the fixed carbon content.
SESSION:
IronTuePM2-R2
| Assis International Symposium (9th Intl. Symp. on Advanced Sustainable Iron & Steel Making) |
| Tue. 28 Nov. 2023 / Room: Dreams 2 | |
| Session Chairs: Giovanni Felice Salierno; Session Monitor: TBA |
16:25: [IronTuePM210] OS
STUDY OF VARIATIONS IN MICROSTRUCTURES AND PROPERTIES OF SINTERED NI-TI ALLOYS ACCORDING TO LOADS APPLIED IN COMPACTION AND SINTERING TEMPERATURES AND TIMES Gabriela Araujo Gois1 ;
Paulo Assis2 ; Orimar Reis
3 ;
1UFOP/REDEMAT, Ouro Preto/MG, Brazil;
2UFOP, Ouro Preto, Ouro Preto, Brazil;
3Instituto Federal de Minas Gerais, Ouro Preto, Brazil;
Paper Id: 116
[Abstract] In the development of the sintering of Ni-Ti alloys, it was noted the importance of carrying out an analysis regarding the influence of compaction load factors, temperatures and sintering times on their properties, given that these alloys are raw materials for biomedical products, such as implants and prostheses that need to have a high quality standard. The present study exposes the reasons why some samples showed more porosity than others, especially it is important to highlight that such samples with more porosity had a considerable decrease in hardness and mechanical resistance. The sintering temperature adopted was 1118°C, for periods of 12h and 24h, using analytical argon 2.0, taking into account the necessary care due to the high reactivity of titanium with other chemical elements. However, it was investigated why the samples that stayed in the oven for 24 hours had more pores compared to those that lasted 12 hours. Furthermore, it was observed that the greater the load applied, the greater the compaction of the alloy and the lower the porosity after sintering. The compression loads used were 21t and 30t, showing considerable differences in the final result of the specimens.
