The modern technology of iron and steel production and possible ways of their development

В изменяющейся мировой обстановке на рынке сырых материалов для черной металлургии разрабатывается ряд новых технологий по производству чугуна и стали, альтернативных существующим технологиям, которые способны обеспечить экономически устойчивую работу металлургических компаний. В дополнении к этому фокусируется внимание на экономии энергии и снижении выбросов парниковых газов в целях решения важнейших вопросов охраны окружающей среды. Изменение состояния окружающей среды ставит новые проблемы перед металлургической промышленностью, потребляющей значительные энергетические и топливные ресурсы. Отрасль вынуждена сосредоточить свое внимание на сокращении всех видов энергии, что приведет и к снижению выброса парниковых газов. Разработка альтернативных технологических процессов производства чугуна и стали способна обеспечить металлургическим компаниям экономически выгодную и устойчивую работу в производстве стали. Для оценки воздействий деятельности металлургических компаний на окружающую среду Инженерно-консалтинговой компанией ХАТЧ (НАТСH, Сanada) были разработаны новые методики моделирования, позволяющие квалифицированно и качественно оценивать риски в потреблении энергии и выбросах СО2 в металлургической промышленности. Методика для анализа выбросов углеродсодержащих парниковых газов названа G-CAP ™ (Зеленый Дом — Борьба с загрязнением воздуха углекислым газом), а для анализа энергоэффективности — En-MAPTM (Планирование действий при управлении энергией). Оценка существующего положения в большинстве интегрированных заводов показала, что они располагают возможностями по экономии энергии и борьбы с загрязнением атмосферы парниковыми газами, лучшие из этих заводов исчерпали эти возможности даже при высоких ценах на квоты выбросов СО2. В этом контексте важно оценить те важные особенности альтернативных технологий получения чугуна и стали, которые разработаны к настоящему времени. Эта статья содержит сравнительную оценку энергоэффективности и выбросов ПГ для некоторых выбранных альтернативных технологий производства чугуна и стали, которые рассматриваются для их реализации. Для этого применены методики G-CAP ™ и G-CAP ™ , элементы которых были разработаны в компании HATCH с основной целью количественной и квалификационной оценки потенциала экономии энергии и сокращения выбросов СО2 в металлургической промышленностиIn the changing global market scenario for raw materials for the steel industry, a number of novel iron and steelmaking process technologies are being developed to provide the steel companies with economically-sustainable alternatives for iron and steel-making. In addition, the steel industry is also focusing on reduction of energy consumption as well as green-house gas (GHG) emissions to address the crucial subject of climate change. Climate change is presenting new risks to the highly energy and carbon-intensive, iron and steel industry. The industry needs to focus on reduction of energy consumption as GHG emissions to address climate change. Development of alternate iron and steelmaking process technologies can provide steel companies with economically-sustainable alternatives for steel production. For managing climate change risks, novel modelling tools have been developed by Hatch to quantify and qualify potential energy savings and CO2 abatement within the iron and steel industry. The tool developed for abatement of greenhouse gas carbon is called G-CAPTM (Green-House Gas Carbon Abatement Process) while that developed for improving energy efficiency is called En-MAPTM (Energy Management Action Planning). Evaluation of existing operations have shown that most integrated plants have GHG and energy abatement opportunities; on the other hand, the best-in-class plants may not have a lot of low-risk abatement opportunities left, even at high CO2 price. In this context, it is important to assess these critical issues for the alternate iron and steelmaking technologies that have been developed. This paper presents a comparative evaluation of energy-efficiency and GHG emissions for some selected iron- and steelmaking technologies that are being considered for implementation. In this work, Hatch’s G-CAP™ and En-MAP™ tools that were developed with the main objective of quantifying and qualifying the potential energy savings and CO2 abatement within the iron and steel industry, were employed in the evaluation conducted

Generalized Completed Local Binary Patterns for Time-Efficient Steel Surface Defect Classification

© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted ncomponent of this work in other works.Efficient defect classification is one of the most important preconditions to achieve online quality inspection for hot-rolled strip steels. It is extremely challenging owing to various defect appearances, large intraclass variation, ambiguous interclass distance, and unstable gray values. In this paper, a generalized completed local binary patterns (GCLBP) framework is proposed. Two variants of improved completed local binary patterns (ICLBP) and improved completed noise-invariant local-structure patterns (ICNLP) under the GCLBP framework are developed for steel surface defect classification. Different from conventional local binary patterns variants, descriptive information hidden in nonuniform patterns is innovatively excavated for the better defect representation. This paper focuses on the following aspects. First, a lightweight searching algorithm is established for exploiting the dominant nonuniform patterns (DNUPs). Second, a hybrid pattern code mapping mechanism is proposed to encode all the uniform patterns and DNUPs. Third, feature extraction is carried out under the GCLBP framework. Finally, histogram matching is efficiently accomplished by simple nearest-neighbor classifier. The classification accuracy and time efficiency are verified on a widely recognized texture database (Outex) and a real-world steel surface defect database [Northeastern University (NEU)]. The experimental results promise that the proposed method can be widely applied in online automatic optical inspection instruments for hot-rolled strip steel.Peer reviewe

Development and characterization of Powder Metallurgy (PM) 2XXX series Al alloy products and Metal Matrix Composite (MMC) 2XXX Al/SiC materials for high temperature aircraft structural applications

The results of a series of material studies performed by the Lockheed Aeronautical Systems Company over the time period from 1980 to 1991 are discussed. The technical objective of these evaluations was to develop and characterize advanced aluminum alloy materials with temperature capabilities extending to 350 F. An overview is given of the first five alloy development efforts under this contract. Prior work conducted during the first five modifications of the alloy development program are listed. Recent developments based on the addition of high Zr levels to an optimum Al-Cu-Mg alloy composition by powder metallurgy processing are discussed. Both reinforced and SiC or B4C ceramic reinforced alloys were explored to achieve specific target goals for high temperature aluminum alloy applications

Do steel prices move together? : a cointegration test

Lack of international comparability in crude steel prices presents a problem in constructing an econometric model of the global steel market. The commonly used measures of crude steel prices are the weighted average of the prices of steel products and the index of the weighted average of prices based on a certain year. But in the context of constructing an econometric model of the global steel market, these measures are not comparable internationally. If the various product prices are cointegrated, it is appropriate to use the price of the most widely produced and traded product in the model (uncoated steel sheet) as an indicator of the general movement of crude steel prices. This paper concludes that the price of uncoated steel sheet cointegrates with the prices of other steel products in France and Germany. The same is not true of the United States, which may point to quality problems with the price data. Use of the price data of uncoated steel sheet as the indicator of crude steel prices in the global steel model would thus seem appropriate for capturing long-term price movements of various steel products. Using cointegration tests, this paper also investigates the relationship between macroeconomic variables and steel product prices.Primary Metals,Environmental Economics&Policies,Markets and Market Access,Access to Markets,Economic Theory&Research

Export profiles of small landlocked countries : a case study focusing on their implications for Lesotho

World Bank demographic and country characteristic statistics identify 16 small landlocked countries that are similar to Lesotho. The authors attempt to determine what useful policy information can be derived from the recent trade performance of these"comparators."Among questions they pose are whether the trade profiles of the comparators suggest potentially promising export ventures for Lesotho, do they indicate directions for a geographic diversification of trade, or do they suggest products in which Lesotho might acquire a comparative advantage. The authors also use U.S. partner country statistics to evaluate Lesotho's export performance in this major market. The U.S. data indicate Lesotho lost competitive export shares for about three-quarters of its major clothing products during the late 1990s. The data show these losses were primarily to the North America Free Trade Agreement (NAFTA) countries in the Caribbean. Lesotho was competing on basically equal terms and did not fare well. But it is generallyheld that the most efficient clothing exporters are in the Far East and not Latin America. Lesotho's difficulties in competing with the latter have worrisome implications for its ability to compete with East Asian exporters when the Multifiber Arrangement is phased out. The comparative advantage profiles of the landlocked comparator countries suggest Lesotho's options for a greatly needed export diversification may be wider than is assumed. One or more of the comparator countries developed a comparative advantage in 110 four-digit SITC (non-clothing) manufactures which are generally labor-intensive in production. Many of these goods should also be suitable for production and export by Lesotho. International production sharing often involves the importation and further assembly of components in developing countries. This activity can significantly broaden the range of new products in which a country can diversify. Statistics show many landlocked comparator countries have moved into component assembly operations, and it appears this activity could contribute to Lesotho's export diversification and industrialization. But the quality problems associated with Lesotho's trade statistics makes it impossible to determine the extent to which local production sharing is occurring. A special effort is needed to tabulate reliable statistics on Lesotho's current involvement in this activity. Finally, the authors attempt to determine how the commercial policy environment in Lesotho compares with that in other countries. Policymakers previously had difficulty in addressing this issue, but several recent efforts to compile comprehensive cross-country indices of the quality of governance and commercial policies now provide relevant information. These statistics suggest domestic commercial policies make Lesotho relatively less attractive to foreign investment than many other developing countries. Less than 20 percent of all Latin American countries have a domestic commercial environment judged to be inferior to that in Lesotho, while the corresponding share for East Asia is under 30 percent. Overall, almost 70 percent of all developing countries appear to pursue commercial policies that make them as, or more, attractive to foreign investment than Lesotho.Markets and Market Access,Economic Theory&Research,Agribusiness&Markets,Environmental Economics&Policies,Trade Policy,Economic Theory&Research,TF054105-DONOR FUNDED OPERATION ADMINISTRATION FEE INCOME AND EXPENSE ACCOUNT,Environmental Economics&Policies,Trade Policy,Agribusiness&Markets