Magnitogorsk Iron and Steel Works has developed an original method for the direct reduction of iron from the titanomagnetite iron and other raw material sources with promising metallurgical technology of third generation ITmk3, spoke at an international conference TMS-2013 in San Antonio (USA) is a leading specialist of the future development of JSC "MMK" Nicholas Panishev.
Calculations show that Capital expenditures for the project the construction of an industrial plant using new technology 20% lower, the capital cost of the traditional metallurgical facilities of similar capacity, operating costs are lower by 30%. Thus, payback such a plant could reach only 2.5 years. Most importantly — new technology (Due to non-participation in it of blast furnace coke and sinter plants) gives a big environmental impact. It is assumed that carbon dioxide, sulfur dioxide, nitrogen oxide and other noxious substances will decrease by about 30% compared to conventional metallurgical techniques.
alkaline two years ago at the Magnitogorsk opened a project to find promising areas of oxidized (hematite) and titanomagnetite ores extraction of different components. Currently, CMI less than a third provided with its own iron ore, which is mined in the field Small Kuybas (Magnitogorsk ore field), and comes from the processing of slag. Development of new technologies allows us to engage in the processing of ore with a high content of magnesium, titanium, vanadium and increase plant availability of raw materials, as reserves of titanomagnetite ores only in the Chelyabinsk region are estimated at several billion tons.
Using titaniferous in traditional blast furnace process is limited high titania slag imparts high viscosity. Therefore, it was decided to appeal to a new breakthrough technology ITmk3, developed in Japan. The technology of direct reduction is a simple process with a one-step operation in the furnace. Unlike previous technologies of direct reduction of iron in the technology ITmk3 recovery, melting and slag separation occur within 9-12 minutes, not hours. In addition, you can replace expensive coke of coal rank and file names, including energy, and even brown.
The experimental fusion were performed in a chamber furnace «Nebertherm», located in the shop magnesia-dolomite refractories, LLC "Refractory" (part of CMI). Careful preparatory work on the selection of qualitative and quantitative composition of the material in the shortest time possible to carry out experiments and successfully obtain granulated iron (nuggets) containing about 97% iron, which may be used as scrap metal in electric arc furnaces. CMI has developed a unique technology with its own parameters, which has already received two positive solutions for a patent.
Speaking about the benefits of the new technology, we can also mention the possibility of using not only titanomagnetite, but also any other low-grade iron-containing materials — blast furnace and converter sludge, flue dust contaminated with impurities of zinc ore and other metals. In this case, the same zinc (as oxide) can be separated, captured and sold as raw material zinc plants. Currently, MMC is considering the construction of an industrial plant, working on technology ITmk3. The introduction of new technology will allow the company to reduce dependence on purchased iron ore, scrap and significantly reduce anthropogenic impacts on the environment.
Annual International Conference and Exhibition of the American Society of minerals, metals and materials TMS Annual Meeting &Exhibition in 2013 was held in the 142 th time. The conference is the world's largest technical forum, who collected this year about 4,200 participants — scientists and technical experts, representatives of the steel industry companies from 86 countries.
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