Cementite Formation from Magnetite under High Pressure Conditions

Kim, Dong-Yuk; Heo, Yoon-Uk; Sasaki, Yasushi

doi:10.2355/isijinternational.53.950

Cited by 15 publications

(9 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the carburization temperature is 550 °C, the standard Gibbs free energy of carburization of Fe 3 O 4 is lower than that of reduction of Fe 3 O 4 (Figure ), so it can be concluded that iron carbide is mainly produced by the carburization of Fe 3 O 4 . Similar results have been obtained in Kim's study . Due to the low carburization reaction rate, the content of combined carbon is only 0.16% (Figure ).…”

Section: Resultssupporting

confidence: 88%

“…Secondly, the Fe 2 O 3 or Fe 3 O 4 is reduced to Fe, and then Fe is carburized to Fe 3 C . When the temperature is below 863 K, most of the Fe 3 O 4 is directly carburized to Fe 3 C (Figure ) . The reduction and carburization of siderite pellet preheated product fit the unreacted core model (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…This result is in good agreement with previous report . During the carburization, the Fe 3 C formation is expressed by the consecutive reactions as follows:

{FeCO}_{3} \overset{k_{1}}{\to} {Fe}_{2} {normalO}_{3} \overset{k_{3}}{\to} {Fe}_{3} {normalO}_{4} \overset{k_{4}}{\to} FeO \overset{k_{5}}{\to} Fe \overset{k_{6}}{\to} {Fe}_{3} C T > 863 K

{FeCO}_{3} \overset{k_{1}}{\to} {Fe}_{2} {normalO}_{3} \overset{k_{3}}{\to} {Fe}_{3} {normalO}_{4} \overset{k_{8}}{\to} {Fe}_{3} C T < 863 K

{FeCO}_{3} \overset{k_{1}}{\to} {Fe}_{2} {normalO}_{3} \overset{k_{3}}{\to} {Fe}_{3} {normalO}_{4} \overset{k_{7}}{\to} {normalF}_{normale} \overset{k_{6}}{\to} {Fe}_{3} C T < 863 K

…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Carburization Behavior of Siderite Pellets in CO–CO₂–H₂ Mixtures

Dong

Guo

Zhang

et al. 2018

steel research int.

View full text Add to dashboard Cite

Siderite is a complex and refractory iron ore, which is hard to be utilized in iron and steel industry nowadays. For the effective utilization of siderite, a study of the carburization behavior of siderite pellet is carried out to improve the preparation of iron carbide from siderite. Siderite pellets are carburized in CO-CO 2 -H 2 mixtures, and its carburization behaviors are demonstrated by measuring carbon content, phase change, and microstructure under X-ray diffraction (XRD), scanning electron microscope (SEM), and optical microscopy. The results show that high temperature favors to the reduction of siderite pellets, but it hinders the carburization of siderite pellet. The optimum carburization temperature is at the range of 600-650 C. At the early stage of carburization, the main reactions are the reduction of iron oxide, while the main reactions are the carburization of metallic iron at the late stage. At the middle stage, reduction and carburization reactions coexist. Carburization of roasted product of siderite pellet ranking from easiest to hardest is as follows: Fe>FeO>Fe 2 O 3 >Fe 3 O 4 . The study of carburization behavior of siderite pellet demonstrates that preparation of iron carbide from siderite is a feasible way.

show abstract

Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

“…This result is in good agreement with previous report . During the carburization, the Fe 3 C formation is expressed by the consecutive reactions as follows:

{FeCO}_{3} \overset{k_{1}}{\to} {Fe}_{2} {normalO}_{3} \overset{k_{3}}{\to} {Fe}_{3} {normalO}_{4} \overset{k_{4}}{\to} FeO \overset{k_{5}}{\to} Fe \overset{k_{6}}{\to} {Fe}_{3} C T > 863 K

{FeCO}_{3} \overset{k_{1}}{\to} {Fe}_{2} {normalO}_{3} \overset{k_{3}}{\to} {Fe}_{3} {normalO}_{4} \overset{k_{8}}{\to} {Fe}_{3} C T < 863 K

{FeCO}_{3} \overset{k_{1}}{\to} {Fe}_{2} {normalO}_{3} \overset{k_{3}}{\to} {Fe}_{3} {normalO}_{4} \overset{k_{7}}{\to} {normalF}_{normale} \overset{k_{6}}{\to} {Fe}_{3} C T < 863 K

…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Carburization Behavior of Siderite Pellets in CO–CO₂–H₂ Mixtures

Dong

Guo

Zhang

et al. 2018

steel research int.

View full text Add to dashboard Cite

show abstract

“…5b), the Fe3O4 (ICDD 01-071-6336) and Fe2O3 (ICDD 01-076-4579) were observed. Due to low partial pressure of O2 [17], it was thought that the Fe2O3 and Fe3O4 could not be formed but Fe3C could exist (Figs. 5c and 5, 6d).…”

Section: Resultsmentioning

confidence: 99%

Effect of Monoethanolamine on Corrosion of A283 Carbon Steel in Propionic Acid Solution

Lakkanasri¹,

Lothongkum²

2019

View full text Add to dashboard Cite

This research studied the effect of monoethanolamine or MEA on corrosion of A283 carbon steels both in water and 5 vol.% propionic acid solution at boiling point temperature of solution. MEA concentrations ranging from 30 to 90 wt.% in water was used. The 5 vol.% propionic acid containing around 45 and 75 wt.% MEA additions (100:1 and 100:5) by volume in the test solution was studied. The carbon steel coupons were tested in a liquid phase, liquid and vapor phase and vapor phase. The weight losses of coupons were evaluated to calculate corrosion rate. A scanning electron microscope and X-ray diffraction were used to characterize the corrosion surface of coupons. The results showed that the corrosion rate order was in the liquid phase > in the liquid and vapor phase > in the vapor phase. MEA decreased the corrosion rate of A283 carbon steel both in water and 5 vol.% propionic acid solution containing around 45 and 75 wt.% MEA additions (100:1 and 100:5) by volume. MEA can be considered as corrosion inhibitor of carbon steel both in water and propionic acid solution. The formed layers of FeO(OH), Fe2O3 and Fe3O4 on the surface were detected to prevent a corrosion attack. The formed layer of Fe3C was also found and discussed. The more severe corrosion was in ferrite.

show abstract

“…However, the applications of reported methods were restricted by the complex, harsh reaction condition, large energy consumption, low productivity, and high cost corrosive reactants [20,26]. Compared to the aforementioned approaches, gas phase carburization [27] is the most promising method for the preparation of iron carbide using hematite [28] and magnetite [29] in CO or CH 4 gas, especially for the preparation of steelmaking raw materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and recovery of iron carbide from pyrite cinder using carburization-magnetic separation technology

Chen

Gou

et al. 2018

J min metall B Metall

View full text Add to dashboard Cite

A new technique with carburization followed by magnetic separation is presented for the preparation of high-grade iron carbide from pyrite cinder to promote the high value-added utilization of pyrite cinder. The effects of carburizing temperature, carburizing time and Na 2 SO 4 dosage on carburized pellets were investigated, and the effects of Na 2 SO 4 dosage and grinding fineness on magnetic concentrate were carried out. The optimized process parameters were proposed as follows: carburizing at 650 °C for 180 minutes in CO-CO 2-H 2 gas mixtures, Na 2 SO 4 dosage of 9%, magnetic field intensity of 130 mT, and grinding fineness of 92.25% powder passing 0.025mm. The iron content, total carbon content, total iron and carbon content of magnetic concentrate were 82.62%, 5.60%, and 88.22%, respectively. The recovery rate of iron reached 88.67%. The behaviors and mechanisms of carburization, separation, and Na 2 SO 4 , were ascertained with optical microscopy, X-ray powder diffraction (XRD), and scanning electron microscope (SEM).

show abstract

Cementite Formation from Magnetite under High Pressure Conditions

Cited by 15 publications

References 21 publications

Carburization Behavior of Siderite Pellets in CO–CO₂–H₂ Mixtures

Carburization Behavior of Siderite Pellets in CO–CO₂–H₂ Mixtures

Effect of Monoethanolamine on Corrosion of A283 Carbon Steel in Propionic Acid Solution

Preparation and recovery of iron carbide from pyrite cinder using carburization-magnetic separation technology

Contact Info

Product

Resources

About

Cementite Formation from Magnetite under High Pressure Conditions

Cited by 15 publications

References 21 publications

Carburization Behavior of Siderite Pellets in CO–CO2–H2 Mixtures

Carburization Behavior of Siderite Pellets in CO–CO2–H2 Mixtures

Effect of Monoethanolamine on Corrosion of A283 Carbon Steel in Propionic Acid Solution

Preparation and recovery of iron carbide from pyrite cinder using carburization-magnetic separation technology

Contact Info

Product

Resources

About

Carburization Behavior of Siderite Pellets in CO–CO₂–H₂ Mixtures

Carburization Behavior of Siderite Pellets in CO–CO₂–H₂ Mixtures