Blast Furnaces
Mostrando 1-12 de 19 artigos, teses e dissertações.
-
1. Discrimination of pores and cracks in iron ore pellets using deep learning neural networks
Abstract The discrimination between pores and cracks is an important step in the microstructural analysis of iron ore pellets. While the porosity is fundamental during the reduction process in blast furnaces, cracks are strongly detrimental to the mechanical strength. The usual image processing tools cannot automatically discriminate between these two types
REM, Int. Eng. J.. Publicado em: 2020-06
-
2. Mechanical strength of briquettes for use in blast furnaces
Abstract The demand for sustainable materials in the steel industry and the search for alternatives for the traditional ferriferous burdens utilized in siderurgy stimulated the development of this research. The briquetting process is a usual measure taken for recycling materials such as ironmaking waste (dust and sludge from blast furnaces), which can be reu
REM, Int. Eng. J.. Publicado em: 2019-03
-
3. Selection of materials for blast furnace injection using quality indicators
Abstract The injection of pulverized materials is a technique used in most of the blast furnaces in the world to reduce coke and charcoal consumption. In addition, injection is one of the main variables of the blast furnace heat control. Coal is the most used material for the injection, but some industries have been attempting to use other materials, usually
REM, Int. Eng. J.. Publicado em: 2019-03
-
4. Impact of operational parameters on fuel consumption of a blast furnace
Abstract Process analyses foster opportunities for identifying losses during the production process and consequently, provide courses of action to enhance the process with operational parameters that are compatible with the targeted results. In this study, a thermochemical model was developed in order to monitor the performance of coke-based blast furnaces,
REM, Int. Eng. J.. Publicado em: 2017-12
-
5. Mine/Mill production planning based on a Geometallurgical Model
Abstract The Pau Branco mine supplies two blast furnaces with iron ore lumps, and currently, charcoal consumption for pig iron production accounts for 47% of the blast furnaces' operational cost. A geometallurgical model is presented to support an economic study considering reserve volumes, product quality, and operational costs based on the metallurgical pe
Rem: Rev. Esc. Minas. Publicado em: 2016-06
-
6. Combustibility and reactivity of coal blends and charcoal fines aiming use in ironmaking
Charcoal is a very important reducing agent in Brazil, the world’s largest steel industry based on charcoal blast furnace. Charcoal generates large amounts of charcoal fines during its production and processing. A good alternative for harnessing this fuel is the injection into coke-based blast furnaces via PCI process (Pulverized Coal Injection), a key tec
Mat. Res.. Publicado em: 08/04/2016
-
7. Caracterização Física, Química e Energética de Biomassas e seus Carvões para Injeção em Altos-Fornos. / Characterization of Physical Chemistry and Biomass Energy and its coal for powder injection in blast furnaces
O objetivo geral deste trabalho foi avaliar a viabilidade de utilização de biomassas e seus carvões através da injeção pelas ventaneiras dos Altos-Fornos - técnica conhecida como Injeção de Carvões Pulverizados (ICP). Desta forma, diferentes biomassas e seus carvões tiveram as suas propriedades físicas e químicas avaliadas, sendo realizados tamb
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2010
-
8. Reactivity of brazilian coal, charcoal, imported coal and blends aiming to their injection into blast furnaces
For about 10 years the steel industry in Brazil has used pulverized coal injection (PCI) technology in the blast furnaces based on imported coals. In order to decrease the dependence on imported coals, Brazilian coal, which has limited use due to high ash content, was suggested to be mixed with imported coal and charcoal. The aim was to examine the reactivit
Materials Research. Publicado em: 2010-09
-
9. Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
Pulverized Coal Injection (PCI) is an important standard technology replacing coke partially by pulverized coal into the blast furnace that allows a significant reduction of hot metal costs and environmental impact, contributing to a decrease of coke requirements for ironmaking. Coals typically used in this process in Brazil are, at current time, exclusively
Publicado em: 2010
-
10. Caracterização de carvão vegetal para a sua injeção em altos-fornos a carvão vegetal de pequeno porte
Hot metal in small blast furnaces (working volume <300 m3) in Brazil represents ca. of 35 % of all of hot metal produced in the country, generating a waste, the charcoal fines. This Project studies the use of this waste into Powder Coal Injection Installations. The main point studied is the behavior of charcoal to be injected into the tuyeres of blast furnac
Publicado em: 2008
-
11. Avaliação da influência do tempo de estocagem em pilhas na qualidade de carvões metalúrgicos
The quality of coal used in the mix for production of coke used in blast furnaces is important for obtainment of a coke within characteristics demanded. Maintain the coke quality without great variations will enable a stable operation of the blast furnace.The objectives of this study were to evaluate the variations in metallurgical coals used for production
Publicado em: 2008
-
12. Estudo para o uso de matérias-primas nacionais em misturas de carvões para obtenção de coque com características requeridas em altos-fornos de alta produtividade
This study has the objective of exploring the possibility of utilizing alternative raw materials available in the country in the coal blends with high quality coals for producing high quality coke for the blast furnaces of Gerdau Acominas, Ouro Branco, Brasil.Characterization of the constituents of the blends (Low grade coal from Santa Catarina, Petroleum co
Publicado em: 2007