-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate. In this paper, iron recovery from IOTs was studied at different points during a process …
به خواندن ادامه دهید
Magnetite-based iron ore usually shows a high sticking tendency and a poor reducibility in the fluidized bed because of its dense structure. To enhance the fluidization and reduction behaviors of magnetite-based iron ore during hydrogen-induced fluidized bed reduction, the effect of a prior oxidation treatment is investigated. The results show …
به خواندن ادامه دهید
The rule of LPF index of iron ores under the mole ratio method is different from that with basicity method. When the mole ratio method is used, the LPF index of iron ore decreases with the increase in gangue content. The molar ratio method is more in line with the liquid phase formation behavior of iron ore during the actual sintering process. 2.
به خواندن ادامه دهید
The reduction behavior of raw and prior-oxidized magnetite iron ore ultra-fines with hydrogen was investigated. Reduction tests were conducted with a thermogravimetric analyzer in a temperature range from 873 K to 1098 K at 1.1 bar absolute, using hydrogen as reducing gas. The experimental results show that a prior oxidation of …
به خواندن ادامه دهید
This work proposes a novel horizontal high-shear granulator for iron ore granulation before sintering process. The granulation behavior such as growth process and structure of granules were firstly analyzed, followed by the effects of operation conditions such as water content, initial particle size distribution, and the concentrate ratio. The …
به خواندن ادامه دهید
This study examines the isothermal and non-isothermal reduction behaviors of iron ore compacts in a pure hydrogen atmosphere and compares the results obtained during the reduction process by CO. The different phases accompanying the reduction reactions were identified using X-ray diffraction (XRD) and its morphology was …
به خواندن ادامه دهید
Japan started the national project "COURSE 50" for CO2 reduction in the 2000s. This project aimed to establish novel technologies to reduce CO2 emissions with partially utilization of hydrogen in blast furnace-based ironmaking by 30% by around 2030 and use it for practical applications by 2050. The idea is that instead of coke, hydrogen is …
به خواندن ادامه دهید
The kinetics of the isothermal reduction of iron ore–coke, iron ore–charcoal, and iron ore–biomass (straw) composite pellets were studied at 900–1200 °C. Compared with the other two composite pellets, the composite pellet using biomass as a reducing agent showed a more rapid reduction rate at a relatively low temperature. With …
به خواندن ادامه دهید
E. Donskoi, ... J.R. Manuel, in Iron Ore, 2015. Abstract. To evaluate an iron ore resource, develop processing routines for iron ore beneficiation, and understand the behavior of …
به خواندن ادامه دهید
Owing to the importance of hydrogen metallurgy for the low-carbon and green iron and steel industries, the reduction behavior and microstructure evolution of two iron oxides (hematite and magnetite) at various temperatures were investigated in a pure hydrogen environment (99.999%). The weight loss ratio, total oxygen content, reduction …
به خواندن ادامه دهید
The steel industry represents about 7% of the world's anthropogenic CO2 emissions due to the high use of fossil fuels. The CO2-lean direct reduction of iron ore with hydrogen is considered to offer a high potential to reduce CO2 emissions, and this direct reduction of Fe2O3 powder is investigated in this research. The H2 reduction reaction kinetics and …
به خواندن ادامه دهید
The utilization of CO2 neutral carbon instead of fossil carbon is one way to mitigate CO2 emissions in the steel industry. Using reactive reducing agent, e.g., bio-coal (pre-treated biomass) in iron ore composites for the blast furnace can also enhance the self-reduction. The current study aims at investigating the self-reduction behavior of bio-coal …
به خواندن ادامه دهید
To reveal the growth behavior and size characterization of iron particles in coal-based reduction, we reduced oolitic hematite–coal composite briquettes at various temperatures, durations and ore size fractions. The degree of metallization and microstructure of the reduced briquettes and the characteristic of iron particle size were …
به خواندن ادامه دهید
While iron is a pivotal metal that is exploited commercially, its extraction from ores, subsequent processing and purification follows a series of steps, and material …
به خواندن ادامه دهید
See more on link.springer
WebWhile iron is a pivotal metal that is exploited commercially, its extraction from ores, subsequent processing and purification follows a series of steps, and material …
به خواندن ادامه دهید
The 3D diffusion model—a novel reduction model based on the 3D diffusion equation—was developed to analyze the reducing behavior of differently shaped iron-ore particles. The model was validated by a reproducibility analysis of certain experimental results and a comparison of the quantified reaction parameters with those of the SC model.
به خواندن ادامه دهید
used to study the reduction and swelling behavior of iron ore pellets[12–16] and cold-bonded briquettes,[17–19] as well as the gas-ification of metallurgical coke.[11] Gas utilization degree is determined for CO and H 2 gases via Equation (7) and (8). etaCO ¼ 100 CO 2 COþ CO 2 (7) etaH 2 ¼ 100 H 2O H 2 þ H 2O (8) whereetaCO and etaH 2 ...
به خواندن ادامه دهید
In this paper, the reduction behaviour of high flux hardened iron ore pellets (basicity 2 to 8) at different temperature and time interval have been studied. The present study concentrates on investigation of the possibilities of making high basicity reduced iron ore pellets (DRI) at low cost, which can be further used in the pig iron refining ...
به خواندن ادامه دهید
In blast furnaces it is desirable for the burden to hold a lumpy packed structure at as high a temperature as possible. The computational thermodynamic software FactSage (version 7.2, Thermfact/CRCT, Montreal, Canada and GTT-Technologies, Aachen, Germany) was used here to study the softening behavior of blast furnace …
به خواندن ادامه دهید
Abstract and Figures. Sinter plants process a mixture of iron ore fines, recycled ironmaking products, slag-forming agents and solid fuel (coke) with the finality of obtaining a product with the ...
به خواندن ادامه دهید
The anthracite contained 7.73% volatiles, and it contained more fixed carbon and had a lower ash content than the coke breeze. It can be seen that the contents of N and S in anthracite are ...
به خواندن ادامه دهید
Insights on consumer attitudes and behavior worldwide ... In August 2023, iron ore was valued at approximately 110.2 U.S. dollars per dry metric ton unit (dmtu), as compared to 108.85 U.S. dollars ...
به خواندن ادامه دهید
Cyclic Behavior of Iron Ore Fines on Board Bulk Carriers: Scale Model Analysis Michael C. Munro 1 and Abbas Mohajerani, Ph.D. 2 Abstract: Solid bulk cargoes have been known to liquefy in the holds of bulk carriers since the loss of the Bengal in 1910.
به خواندن ادامه دهید
The DRI produced was achieved through the non-contact reduction of goethite-hematite ore acquired as run-off mines from selected ore depots. The study aims to investigate the behavioral pattern of iron ore in the CO/CO 2 atmosphere from wood charcoal. The kinetic model employed was the shrinking core model.
به خواندن ادامه دهید
The influence of different pre-oxidation temperatures and pre-oxidation degrees on the reduction and fluidization behaviors of magnetite-based iron ore was investigated in a hydrogen-induced fluidized bed. The raw magnetite-based iron ore was pre-oxidized at 800 and 1000°C for a certain time to reach a partly oxidation and deeply …
به خواندن ادامه دهید
The relationship of particle size, reaction and sticking behavior of iron ore fines toward efficient fluidized bed hydrogen reduction were systematically investigated at 600–800 °C in a laboratory fluidized bed. First, the reduction kinetics were studied, and the results showed that hydrogen reduction of granulated iron ore was controlled by ...
به خواندن ادامه دهید
A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore fines. Hydrogen was chosen as a reducing agent across a temperature range of 873–1073 K.The magnetite ore used exhibited strong sticking behavior after the initiation of metallic iron formation.
به خواندن ادامه دهید
Kinetic Modelling. After the reduction test by volatiles depicted in section Raw Materials, the pre-reduced iron ore samples obtained at 800 °C were submitted to thermogravimetric analysis (TGA) to assess the kinetics related to the reduction at high temperatures.The kinetic parameters were determined with the well-known non …
به خواندن ادامه دهید
Swelling behavior of iron ore pellet reduced by H-2-CO mixtures. Powder Technol., 269 (2015), pp. 290-295. View PDF View article View in Scopus Google Scholar. Yu et al., 2015. W. Yu, T.C. Sun, T.Y. Hu. Desulfuration behavior of low-grade iron ore-coal briquette during the process of direct reduction followed by magnetic separation.
به خواندن ادامه دهید
While iron is a pivotal metal that is exploited commercially, its extraction from ores, subsequent processing and purification follows a series of steps, and material characterization in terms of physical, chemical and mineralogical features and behavior is imperative at each stage. Some characterization tests rely solely on physical …
به خواندن ادامه دهید