Reduction Kinetics of Iron Ore Materials by Gases

2009 ◽  
Vol 283-286 ◽  
pp. 45-52 ◽  
Author(s):  
A.N. Dmitriev ◽  
Yu.A. Chesnokov
Keyword(s):  
Blast Furnace ◽  
Mass Exchange ◽  
Iron Ore ◽  
Graphical Representation ◽  
Furnace Operation ◽  
Critical Parameters ◽  
Blast Furnace Process ◽  
Heat And Mass Exchange ◽  
Model Calculations ◽  
Furnace Process

The proposed balance logic-statistical model of the blast furnace process is based on the use of material and thermal balances along with calculations of heat- and mass exchange taking into account the non-uniformity of gas and burden distribution on the radius of the furnace and influence of the basic metallurgical characteristics of iron ore raw materials and coke on the indices of blast furnace operation. As a check of the applicability of the model, calculations on the most critical parameters of the blast furnace process – the smelting of ferromanganese and iron nickel with a graphical representation of heat- and mass exchange processes, dynamics of oxides reduction on the height and radius of the blast furnace have been carried out.

Reduction of Composite Pellet Containing Indonesia Lateritic Iron Ore as Raw Material for Producing TWDI

2013 ◽  
Vol 281 ◽  
pp. 490-495 ◽  
Author(s):  
Adji Kawigraha ◽  
Johny Wahyuadi Soedarsono ◽  
Sri Harjanto ◽  
Pramusanto
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Material ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Composite Pellet ◽  
Furnace Process ◽  
Iron Phase ◽  
Reductive Atmosphere ◽  
Reduced Pellets

Blast furnace process is still an important process for producing pig iron. The process needs high grade iron ore and coke. The two materials can not be found easily. In addition blast furnace process needs cooking and sintering plant that produces polluted gases. Utilization of composite pellet for pig iron production can simplify process. The pellet is made of iron ore and coal. In addition the pellet can be made from other iron source and coal. This paper discusses the evolution of phase during reduction of composite pellet containing lateritic iron ore. Fresh iron ore and coal were ground to 140 mesh separately. They were mixed and pelletized. The quantity of coal added was varied from 0 %, 20 % and 29 % of pellet weight. Pellets were heated with 10 °C/minute to 1100 °C, 1200 °C, 1300 °C and 1350 °C in a tube furnace and temperature was held during 10 minutes. Heated pellets were analyzed with XRD equipment. XRD of reduced pellets showed that iron phase change with coal and temperature. Lack of coal during heating results the re-oxidation of iron phases. This process is due to replacement of reductive atmosphere by oxidative atmosphere.

The Coke and Iron Ore Materials Kinetic Characteristics and Quantitative Indicators of Blast Furnace Process

2012 ◽  
Vol 322 ◽  
pp. 87-106 ◽  
Author(s):  
A.N. Dmitriev ◽  
Yu.A. Chesnokov ◽  
G.Yu. Arzhadeeva
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Energy Costs ◽  
Blast Furnace Process ◽  
Blast Furnace Smelting ◽  
Furnace Process ◽  
General Energy ◽  
Quantitative Indicators ◽  
Furnace Smelting

The most important problem at the blast furnace process developing is the great coke consumption decreasing at the minimization of the general energy costs. One of the most effective ways of iron-making technical progress is the iron ore materials and coke physicochemical properties improvement which allows to increase the iron productivity and decrease the specific coke rate without construction of new blast furnaces and concentrating mills. Some of the quality indicators of iron ore raw materials and coke and their influence on the main parameters of a blast furnace smelting are considered in the paper.

scholarly journals Transfer Mechanism of Lanthanum from Rare Earth Containing Iron Ore to Pig Iron during the Blast Furnace Process

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Wei Qu ◽  
Huiping Ren ◽  
Zili Jin ◽  
Fang Dong
Keyword(s):  
Blast Furnace ◽  
Rare Earth ◽  
Functional Groups ◽  
Iron Ore ◽  
Pig Iron ◽  
Blast Furnace Process ◽  
Graphite Phase ◽  
Furnace Process ◽  
Porous Graphite ◽  
Bayan Obo

Some iron ores are enriched with lanthanum element, for example, the Bayan Obo iron ore in China. The pig iron which used the Bayan Obo iron ore as the raw material was obtained from the blast furnace of Baotou Steel in order to research the transfer mechanisms of lanthanum from rare earth containing iron ore to pig iron during the blast furnace process. The thermodynamic process was calculated using the molecular-ion coexistence model. The slag-metal reactions of the hearth were carried out in the tube furnace. The morphology and phase structure in the pig iron were observed by SEM and XRD. The rule of lanthanum transfer was analyzed by physical and chemical analyses using ICP-MS. Fourier-transform infrared spectroscopy was used for analyzing the vibrations of functional groups. The results indicate that the La2O3 in the slag was reduced to LaC2 by carbon and then the LaC2 dissolved into the molten iron to form La. At last, coke which has the oxygen-containing functional groups (C-OH, C=O, and C-O-C) has capacity to absorb lanthanum that is dissolved in the molten iron during the blast furnace iron-making process, and increasing the lanthanum content in the slag leads to higher lanthanum concentration in the porous graphite phase of the pig iron. The coke is graphitized during the process and could remain in the pig iron as porous graphite phase which acts as the carrier of lanthanum.

Reduction behavior of vanadium-titanium magnetite carbon composite hot briquette in blast furnace process

2019 ◽  
Vol 342 ◽  
pp. 214-223 ◽  
Author(s):  
Wei Zhao ◽  
Mansheng Chu ◽  
Hongtao Wang ◽  
Zhenggen Liu ◽  
Jue Tang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Carbon Composite ◽  
Blast Furnace Process ◽  
Reduction Behavior ◽  
Furnace Process ◽  
Vanadium Titanium ◽  
Titanium Magnetite

scholarly journals The use of ammonium sulfate as an inhibitor of dioxin synthesis in iron ore sintering process

2014 ◽  
Vol 21 (1) ◽  
pp. 59-70 ◽  
Author(s):  
Patrycja Łechtańska ◽  
Grzegorz Wielgosiński
Keyword(s):  
Ammonium Sulfate ◽  
Air Pollutants ◽  
Iron Ore ◽  
Sintering Process ◽  
Blast Furnace Process ◽  
Furnace Process ◽  
Iron Ore Sintering ◽  
Iron Ore Sintering Process ◽  
Ore Sintering ◽  
Main Component

Abstract The main air pollutants in the sintering process of iron ore are polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans (PCDD/Fs) and harmful dust. Ore sintering on sinter strands is one of the first technology steps in the ironworks. It is a process in which iron ore is crushed, subjected to annealing and mixed with appropriate additives, and then sintered in order to produce sinter which is the main component of iron in the blast furnace process. PCDD/Fs emissions were measured and the addition of ammonium sulfate as an inhibitor of the synthesis of dioxins in the sintering process of iron ore was studied.

A Review on Explorations of the Oxygen Blast Furnace Process

2020 ◽  
Vol 92 (1) ◽  
pp. 2000326
Author(s):  
Wei Zhang ◽  
Jing Dai ◽  
Chengzhi Li ◽  
Xiaobing Yu ◽  
Zhengliang Xue ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Process ◽  
Furnace Process ◽  
Oxygen Blast Furnace ◽  
Oxygen Blast
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