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Study Of Reduction Kinetics Of Iron Ore Pellets By Noncokingcoal
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Book Synopsis Study of Reduction Kinetics of Iron Ore Pellets by Noncokingcoal by :
Download or read book Study of Reduction Kinetics of Iron Ore Pellets by Noncokingcoal written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand of sponge iron and pre-reduced pellets for the manufacture of different varieties of steel is increasing day by day and new solid reductant based sponge iron plants are being commissioned. In the existing blast furnace an increase in production by at least 25 to 35% can be achieved by using pre reduced iron ore. Pre-reduced iron ore pellets have been established as a good substitute for steel scrap in an electric arc furnace which enhances the productivity of the arc furnace. Also majority of fines which are generated during the course of handling, mining, transportation etc are exported at a through away price which need to be utilized by making iron ore pellets for sponge iron making. A lot of investigations have been carried out on direct reduction process of iron oxides by carbonaceous materials, but little work has been done on the characterization of properties and reduction behavior of iron ore of some mines of Orissa. In the present project work, an attempt has been made to study the reduction behavior and kinetics of fired iron ore pellets. The effect of different reduction parameters such as temperature (850-10000C), time (15-120 min.), reductant quality, pellets Vs lump, mixing of particles of different sizes at different ratios for pellet preparation etc. on the reduction behavior of iron ore pellets. These form the subject matter of the thesis. First chapter gives the introduction of the subject. It speaks about the need of DRI industry, scope, present status and future planning of DRI industry in India, world wise DRI production, etc. It also presents the mechanism of direct reduction process. The second chapter shows the literature review. The third chapter deals with planning of experiments, selection of raw materials, preparation of samples, preparation of iron ore pellets, experimental procedure for characterization of different chemical and strength properties of the selected iron ore lump, proximate analysis of selected noncoking coals, ev.
Book Synopsis Reduction Kinetics of Iron Ore Pellets and the Effect of Binders by :
Download or read book Reduction Kinetics of Iron Ore Pellets and the Effect of Binders written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reduction of Iron Ore Pellets with a particular percentage of binders i.e. 2% of Dextrine and 2% of Bentonite was carried out for the temperature range 900 to 1050°C. In reduction kinetic study the most satisfactory model was to taken, the slope of the initial linear region of fractional reduction vs. time curve was measured, which gives the rate constant (k). Ln k vs. 1/T plots were straight line from which Activation Energy was calculated. Pellets having different percentages of binders were reduced and compared to find the effect of binders.
Book Synopsis "Reduction Kinetics of Iron Ore Pellets Made by Addition of -100# Size Fines in Conventional Pellets." by :
Download or read book "Reduction Kinetics of Iron Ore Pellets Made by Addition of -100# Size Fines in Conventional Pellets." written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing trend in the prices of steel scrap and its short supply led the steel technologists to find a suitable charge mix in the form of sponge iron or Direct Reduced Iron (DRI). Sponge Iron or DRI is obtained from the direct reduction of iron ore and has iron content between 84 to 95 percent. Technically and technologically, sponge iron has been found to be a suitable material for charging in blast furnaces. In the existing blast furnace an increase in production by at least 25 to 35% can be achieved by using pre reduced iron ore. Sponge iron is a better substitute for scrap for steelmaking through EAF / IF routes due to its homogenous nature, Improved productivity and lower coke consumption. Also majority of fines which are generated during the course of handling, mining, transportation etc are exported at a through away price which need to be utilized by making iron ore pellets for sponge iron making. According to industry experts, the preference for usage of DRI will lead to the use of 80 percent DRI in the charge mix in EAFs by 2009-10 which may even reach the 85 percent level by 2011-12 in the various regions of India. A lot of investigations have been carried out on direct reduction process of iron oxides by carbonaceous materials, but little work has been done on the characterization of properties and reduction behavior of iron ore of some mines of Orissa. In the present project work, an attempt has been made to study the reduction behavior and kinetics of fired iron ore pellets. The effect of different reduction parameters such as temperature (900-950°C), time (15-60 min.), reductant quality, mixing of particles of different sizes at different ratios for pellet preparation etc. on the reduction, swelling behavior of iron ore pellets. These form the subject matter of the thesis. First chapter gives the introduction about the subject. It speaks about the need of DRI industry, scope, present status and future planning of DRI industry in India, world wis.
Book Synopsis Reduction Kinetics of Iron Ore-Graphite Composite Pellets by : Dr. Golap Mohammad Chowdhury
Download or read book Reduction Kinetics of Iron Ore-Graphite Composite Pellets written by Dr. Golap Mohammad Chowdhury and published by LAP Lambert Academic Publishing. This book was released on 2010-11 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rate of reduction of iron ore-graphite composite pellets under inert and reducing atmospheres has been investigated in a tailor made thermo-gravimetric packed-bed reactor. A very low overall apparent activation energy estimated from experimental data indicates that the reduction is not chemical kinetics controlled. A kinetic model has been developed to quantify the temporal evolution of different iron oxide phases and metallic iron. The rate-dependent parameters (frequency factors and activation energy) have been estimated from experimental data by applying an optimization tool (Genetic Algorithm). The predicted phases at various degrees of reduction were verified by X-ray diffraction and metallographic investigation. A simplified thermal model has also been developed to show the role of heat transfer on the kinetics of the reduction process under inert atmosphere. The reduction kinetics of the composite pellets in the packed bed under reactive atmosphere is not heat transfer controlled and might possibly be controlled by CO-gas mass transfer through the pellets.
Book Synopsis Kinetics of Iron Ore Reduction by Coal and Charcoal by :
Download or read book Kinetics of Iron Ore Reduction by Coal and Charcoal written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the present investigation, an attempt has been done to study the simultaneous effects of the major processing variables on the extent of reduction of iron ore pellets surrounded by coal or charcoal fines in an externally heated cylindrical steel container (diameter 5cm and height 10cm) placed in muffle furnace. The project goal is to compare the reduction potential of coal and charcoal in reduction of iron ore pellets. Wood charcoal contains very low levels of gangue, sulphur and volatile matter therefore, presenting itself as a very desirable reductant for the reduction of iron ore. The variables studied are time and temperature. The reduction was done at temperatures 8500C, 9000C, 9500C and 10000c. The percentage (degree) of reduction of pellets was calculated at 15, 30, 45, 60 and 90 minutes, after the furnace reached the predetermined reduction temperature. The experiments were statistically designed such that the effect of each variable can be quantitatively assessed and compared. The results showed that, there is an increase in degree of reduction with increase in time and temperature and use of charcoal instead of coal also increased the degree of reduction due to higher fixed carbon content of charcoal. The percentage of swelling showed a random variation with time and temperature. The activation energy for the reduction of iron ore pellet was found to be higher in case of coal as compared to that of in case of charcoal; this indicates that reduction of iron ore by charcoal will be more favorable in case of charcoal.
Book Synopsis Reduction Behaviour of Iron Ore Pellets by :
Download or read book Reduction Behaviour of Iron Ore Pellets written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand of sponge iron and pre-reduced pellets for the manufacture of different varieties of steel is increasing day by day and new solid reductants based sponge iron plans are being commissioned. In the existing blast furnace an increase in production by at least 25 to 35% can be achieved by using pre reduced iron ore. Pre-reduced iron ore pellets have been established as a good substitute for steel scrap in an electric arc furnace which enhances the productivity of the arc furnace. A lot of investigations have been carried out on direct reduction process of iron oxides by carbonaceous materials, but little work has been done on the characterization of properties and reduction behavior of iron ore of. In the present project work, an attempt has been made to study the reduction behavior and kinetics of iron ore fired pellets. The effect of different reduction parameters such as temperature (850-1000ðC), time (15-120 minutes.), mixing of particles of different sizes at different ratios for pellet preparation etc. on the reduction behavior of iron ore pellets. These form the subject matter of the thesis. First chapter gives the introduction about the subject. It speaks about the need of DRI industry, scope, present status and future planning of DRI industry in India, world wise DRI production, etc. It gives a general idea of raw materials quality required for producing DRI, especially in Rotary Kiln. The second chapter deals with the literature survey. The third chapter deals with planning of experiments, selection of raw materials, preparation of samples, preparation of iron ore pellets, experimental procedure, evaluation of reduction and activation energies, etc. The results obtained and the discussions made from these observations have been outlined in chapter four. The result for fired iron ore pellets indicated an increase in degree of reduction with increase in reduction temperature (850-1000ðC) and time. The reduction kinetics of Zenith iron ore pellets were st.
Book Synopsis Ironmaking and Steelmaking Processes by : Pasquale Cavaliere
Download or read book Ironmaking and Steelmaking Processes written by Pasquale Cavaliere and published by Springer. This book was released on 2016-09-02 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes improvements in the iron and steel making process in the past few decades. It also presents new and improved solutions to producing high quality products with low greenhouse emissions. In addition, it examines legislative regulations regarding greenhouse emissions all around the world and how to control these dangerous emissions in iron and steel making plants.
Book Synopsis Iron Ores and Iron Oxides - New Perspectives by : Brajesh Kumar
Download or read book Iron Ores and Iron Oxides - New Perspectives written by Brajesh Kumar and published by BoD – Books on Demand. This book was released on 2023-09-13 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid development in engineering and biomedical applications of iron and iron oxide materials has attracted the attention of researchers around the world. discusses the extraction, synthesis, characterization, and applications of iron, iron oxide, and their nanoparticles/nanocomposites. It includes six chapters that address such topics as environmentally friendly techniques for engineering iron nanoparticles, the application of nano-dimensional iron oxide nanoparticles with nanotoxicology, biomedical applications of superparamagnetic iron oxide nanoparticles, and much more.
Book Synopsis Kinetics of Iron Ore Reduction by : Chun-Hao Koo
Download or read book Kinetics of Iron Ore Reduction written by Chun-Hao Koo and published by . This book was released on 1977 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies in the Kinetics of Iron Ore Reduction by :
Download or read book Studies in the Kinetics of Iron Ore Reduction written by and published by . This book was released on 1963* with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the International Conference on Metallurgical Engineering and Centenary Celebration by : Sudipta Patra
Download or read book Proceedings of the International Conference on Metallurgical Engineering and Centenary Celebration written by Sudipta Patra and published by Springer Nature. This book was released on 2023-10-14 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents peer reviewed articles from The International Conference on Metallurgical Engineering and Centenary Celebration (METCENT 2023), held at Indian Institute of Technology (BHU) Varanasi, India from the 26-28th of October 2023. It covers wide areas of metallurgical and materials science, highlighting recent advancements in these areas, including but not limited to Advanced Steels, Computational Material Science, Recent Ferrous/Non-Ferrous Metallurgy Processes, Green Iron and Steel Making Technologies and others. METCENT 2023 provides a unique opportunity to all the Metallurgists, Materials Scientists, Academicians and Industry experts to share their experiences on this special occasion.
Book Synopsis Studies in the Kinetics of Iron Ore Reduction by :
Download or read book Studies in the Kinetics of Iron Ore Reduction written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies in the Kinetics of Iron Ore Reduction by :
Download or read book Studies in the Kinetics of Iron Ore Reduction written by and published by . This book was released on 1965 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1996 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Kinetics and Mechanisms of Iron Ore Reduction in Ore/coal Composites by :
Download or read book A Study of Kinetics and Mechanisms of Iron Ore Reduction in Ore/coal Composites written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Indian Science Abstracts written by and published by . This book was released on 1990 with total page 1220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Reduction of Iron Ores by : Ludwig von Bogdandy
Download or read book The Reduction of Iron Ores written by Ludwig von Bogdandy and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the English edition the book was revised by the authors, taking into account a number of suggestions of the readers of the German edition. Some of the most important publications in the field of iron ore reduction, which appeared since 1967, have been used to bring the manuscript as far as possible up to date. The kind assistance of Dr. K. BOHNENKAMP of the Max-Planck-Institut fUr Eisenforschung, Dusseldorf, was much appreciated in this respect. Ohapters 2.9 and 2.10, dealing with the reduction of molten oxide slags by solid carbon and with the contribution of the water-gas reaction to iron ore reduction, have been added for the English edition. Ohapter 2.9 has been completely revised with the kind assistance of Dr. H. J. GRABKE, Stuttgart. Dipl.-Ing. J. LODDE contributed to this edition by revising the bibliography. Owing to the rapid development of the blast furnace it was necessary to revise Ohapter 5 considerably. In this field many valuable suggestions have been made by Dipl.-Ing. G. LANGE and Dipl.-Ing. P. HEINRICH. Furthermore, Ohapters3 and 4 have been thoroughly revised by Dr.-Ing. E. FORSTER and Dr.-Ing. U. SCHIERLOH. Last, but not least, we have to thank our translators for their excellent work.
