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Solid State Reduction of Iran Titanomagnetites to Extract TiO2 & Fe
, M.Sc. Thesis Sharif University of Technology ; Askari, Masoud (Supervisor)
Abstract
Titanomagnetites are resources of iron and titanium. high level of titanium in titanomagnetites makes using them in iron making processes very difficult. In this work an attempt was made to produce an iron bearing and a titanium bearing product using solid state reduction of Fanouj mine titanomagnetite concentrate. For this purpose, the concentrate was reduced using coal and then was subjected to magnetic separation. In this work, effect of temperature, time, added coal amount, and additive amount on reduction was studied. The result showed that the optimum conditions are 1325 celsius degree, 2.5 hours, 25 percent added coal and 2 percent additive. In optimum conditions a magnetic product...
TiO2 Production by Acid Leaching of Upgraded Titanium Slag
, M.Sc. Thesis Sharif University of Technology ; Askari, Masoud (Supervisor)
Abstract
In Iran, titanium dioxide is still not produced and imports of titanium dioxide are required by various industries, including dyeing, electrodeposition, plastics and Therefore, according to the Ministry of Industries and Mines objectives, to obtain the technology of extraction Ti and TiO2, a research was carried out on titanomagnetite concentrate, extracted from the minerals of the plancher titanumitent and low-grade kahnoj. In this research, titanium dioxide is produced by sulfate method. Solid state recovery and magnetic separation were used to isolate titanium and iron. The dissolution process was then performed to achieve maximum dissolution. At this stage, the effects of temperature,...
Leaching of Titanium-bearing Concentrate of Solid-state Reduction of Titanomagnetite Ores
, M.Sc. Thesis Sharif University of Technology ; Askari, Masoud (Supervisor)
Abstract
Some of the low-grade titanium resources which are located in the country are titanomagnetite placer deposits. In current study, beneficiation of titanium-bearing concentrate of a placer deposit containing 6.13wt.% TiO2 was investigated by acidic leaching in order to remove impurities. To beneficiate the concentrate, based on the optimum conditions obtained in previous studies, solid-state reduction, magnetic separation, and calcination of non-magnetic product were performed. Afterwards, by studying temperature, time, acid concentration and L:S ratio, the final product was leached under optimal conditions were as follows: H2SO4 concentration of 15wt.%, L:S ratio of 20:1 (mL:g), reaction...
Solid state reduction of Iranian titanomagnetite concentrate optimization and study
, Article Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy ; 2019 ; 25726641 (ISSN) ; Askari, M ; Sharif University of Technology
Taylor and Francis Ltd
2019
Abstract
An attempt was made to produce an iron bearing and a titanium bearing product, using solid state reduction of Fanouj mine titanomagnetite concentrate. For this purpose, the concentrate was mixed with pulverised coal and sodium carbonate and was reduced in a muffle furnace. The product was then subjected to magnetic separation. In this work, the effect of temperature, time, added coal and additive amount on reduction was studied. The Separation Efficiency (SE) index was used for optimisation of the process. Using SE is more appropriate than degree of metallization, which is usually used, for optimising reduction processes. The results show that the optimal conditions are 1325°C, 2.5 h, 25...
Solid state reduction of Iranian titanomagnetite concentrate optimization and study
, Article Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy ; Volume 130, Issue 4 , 2021 , Pages 409-415 ; 25726641 (ISSN) ; Askari, M ; Sharif University of Technology
Taylor and Francis Ltd
2021
Abstract
An attempt was made to produce an iron bearing and a titanium bearing product, using solid state reduction of Fanouj mine titanomagnetite concentrate. For this purpose, the concentrate was mixed with pulverised coal and sodium carbonate and was reduced in a muffle furnace. The product was then subjected to magnetic separation. In this work, the effect of temperature, time, added coal and additive amount on reduction was studied. The Separation Efficiency (SE) index was used for optimisation of the process. Using SE is more appropriate than degree of metallization, which is usually used, for optimising reduction processes. The results show that the optimal conditions are 1325°C, 2.5 h, 25...