Foundry 2018. Proceeding of the XXV International Scientific and Technical Conference
The ХХV International scientific – technical conference “Foundry 2018” was held of the 18-20 April 2018 at “Rostov” hotel in the city of Pleven, Bulgaria. Its aim is to provide a meeting place for scholars from different countries to present their scientific achievements and to discuss the problems of casting production.
The paper analyzes melt shop and caster scheduling at special steel maker – Trinecke Zelezarny. The main optimization objectives of melt shop and caster scheduling are defined as: minimization of earliness and lateness of orders, maximization of tundish utilization, minimization of steel grade changes and minimization of mold width changes, minimization of stock, minimization of over grading, management of iron inventory. The following key problems of scheduling are defined: underdeveloped optimization algorithms and insufficient computer performance. Based on this the key provisions of a new method of melt shop and caster scheduling are proposed. The method significantly improves quality of planning. It includes the following three stages: production capacity allocation; heat building; sequencing. An experience of successful practical development and implementation of specialized software solution based on the new method at Czech special steel maker is provided.
Accompanying publication the Conference Proceedings volume edited by prof. Nada Štrbac, dr Ivana Markovic and dr Ljubisa Balanovic was published by the University of Belgrade, Technical Faculty in Bor in 664 pages (hard cover, 17 x 24 cm, ISBN 978-86-6305-066-2). It includes 153 papers of 462 authors from 30 countries - Austria, Bosnia and Herzegovina, Bulgaria, China, Croatia, Czech Republic, France, Germany, Hungary, India, Iran, Italy, Japan, Jordan, Kazakhstan, Libya, Macedonia, México, Montenegro, Norway, Poland, Romania, Russia, Slovakia, Slovenia, South Africa, Spain, Turkey, USA and Serbia.
The governments of the member states of the Eurasian Economic Union should set an ambitious goal of creating a powerful, innovative and competitive union-wide complex of the rare earth industry. Its implementation is ideally suited as one of the "flagship" projects of the EAEU, which are now actively discussing and looked for in the Eurasian Economic Commission (EEC) and in the scientific expert community of the Union countries. Moreover, there are a lot of strong arguments in favor of the success of the development of the union-wide complex of the rare earth industry.
The article analyzes practical aspects of tactical planning process implementation using the methods and mathematical programming models at pipe producer.
A review of terminology, including terminology of basic concepts of supply chain management - SCOR and GSCF is provided. The importance of organizing effective tactical planning at industrial enterprises in connection with the ongoing trend in the complexity of the material, financial and information flows in their supply chains is highlighted.
Overview of past and present of Russian pipe producer as well as an overview of its development programs are provided. A key risk of the development program is defined as unsynchronized and unbalanced flow of materials through the supply chain. This notes the need for organizing effective tactical planning.
The analysis of the traditional process of tactical planning and its relationship with other levels of planning is conducted. Problem areas were identified. The basic principles of advanced tactical planning process are defined, including: feasibility of the plans; holistic view of the supply chain; optimality; performance.
Tactical modelling technology of supply chain is defined. The recommendations for the organization of an iterative approach for the creation of a model are provided, which is the gradual complication of the model as the implementation phases of the project. The results of the zero phase of the project at the pipe company are presented.
In conclusion, there are the results achieved in the whole pipe company, recommendations for the implementation of improvements.
The materials of The International Scientific – Practical Conference is presented below.
The Conference reflects the modern state of innovation in education, science, industry and social-economic sphere, from the standpoint of introducing new information technologies.
It is interesting for a wide range of researchers, teachers, graduate students and professionals in the field of innovation and information technologies.
In the paper the content of individual elements (Fe, Co, Zr, Ca and F) contained in nanocomposites FeCoZr ferromagnetic alloy in the CaF2 transparent ceramics dielectric matrix, depending on the content of the metal phase x was determined by the X-ray diffusion microanalysis (EDX) method. The nanocomposites were made by sputtering by argon ions. Investigations of changes in the chemical composition of nanocomposites under the influence of high-temperature treatments were carried out using the thermogravimetry method in the temperature range from 25 °C to 1000 °C with a temperature increase rate of 10 °C/min. On the basis of the research, a model of changes of the structural-phase state of nanogranular layers of ferromagnetic alloy Fe45Co45Zr10 in the transparent ceramics CaF2 matrix occurring under the influence of high-temperature treatments was proposed.
The article describes the formulation and solution of the axisymmetric problem of quantify SSS composite cylinder with a sandy soil under the influence of an external load of plate foundations, analytical and numerical methods based on elastic-plastic properties of soils. Shown that the axial force on the composite cylinder is distributed between the sand-pile and the surrounding previously compacted weak soil in proportion to their stiffness and diameter ratio. It is noted that at a certain load in the sand pile, plastic deformations occur as a result of which the stresses are redistributed, and the total deformation of the composite cylinder develops nonlinearly. It is shown that, depending on the calculation model adopted in the sandy soil pile at stresses close to the ultimate value various forms of destruction forming, including the barrel at different levels. Stresses that this phenomenon was observed for the first time and requires further research and theoretical basis.
Innovation-Based Development of the Mineral Resources Sector: Challenges and Prospects contains the contributions presented at the XI Russian-German Raw Materials Conference (Potsdam, Germany, 7-8 November 2018). The Russian-German Raw Materials Conference is held within the framework of the “Permanent Russian-German Forum on the Issues of the Use of Raw Materials”, which has as goals to develop new approaches to effectively use energy, mineral and renewable natural resources and to initiate cooperation in the field of sustainability and environmental protection. The contributions cover current trends in the development of raw materials markets and the world economy, the state of the environment and new technologies applied in the sector, effectively responding to modern challenges. The 63 accepted papers are grouped into four main sections:
• Mineral exploration and mining
• Mining services
• Processing of raw materials
Innovation-Based Development of the Mineral Resources Sector: Challenges and Prospects will be of interest to academics and researchers involved in the mineral resources sector, but also to professionals in the public, foreign trade and education fields, and representatives of major corporations and professional associations.
This work describes the monitoring of structural reinforced concrete elements with additional strengthening elements. For reinforcing, the metal channels with rigid connection to the reinforced concrete beams were used. Subject. This work describes the study of potentialities of geodetic and strain-measuring monitoring during the operation of strengthened concrete beams with additional reinforcement elements when static loading. Purpose. Development of monitoring systems for factual work of reinforced concrete beams; assessment of reliability of the results obtained. The initial materials for this study were the data obtained from geodetic and strain-measuring monitoring in the process of a stage-by-stage static loading of reinforced concrete beams. Results. The time dependences of the deflection of reinforcement elements in the structures under reinforcement are obtained when their stage-by-stage static loading. Conclusions. The possibility of the studied methods application is found to be proved for the monitoring of concrete structures with additional reinforcement elements.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.