scholarly journals Prospective directions for development of metallurgy and materials science of steel

2017 ◽  
Vol 89 (10) ◽  
pp. 1553-1565 ◽  
Author(s):  
Alexander I. Zaitsev
Keyword(s):  
Materials Science ◽  
Raw Material ◽  
Material Base ◽  
Efficient Technology ◽  
Chemical Methods ◽  
Current State ◽  
Physico Chemical ◽  
Metallic Inclusions ◽  
Reducing Costs ◽  
Qualitative Characteristics

AbstractThe features of current state of metallurgical technology and materials science of mass high-grade steels are viewed. A promising direction for principle improvement of the complex of properties and qualitative characteristics of steel including those, which are difficult to combine, is shown. It is the development of adequate physico-chemical methods of prediction and efficient technology methods of management of non-metallic inclusions, forms of presence of impurities, phases precipitations, structural state, including uniformity over the volume of metal. Additionally this approach allows reducing costs and expanding the raw material base. Its effectiveness is illustrated by the results of research carried out for a number of groups of mass high-quality steels.

Studying the Effect of some Factors on the Stress-Strain Behavior of the Rostov Region Limestones in the Course of their Production and Use

2021 ◽  
Vol 1022 ◽  
pp. 80-86
Author(s):  
Mikhail G. Kholodnyak ◽  
Sergey A. Stelmakh ◽  
Evgeniy M. Shcherban ◽  
Mukhuma P. Nazhuev
Keyword(s):  
Construction Material ◽  
Experimental Studies ◽  
Raw Material ◽  
Material Base ◽  
Strain Behavior ◽  
Current State ◽  
Rostov Region ◽  
Literary Sources ◽  
Crushed Granite ◽  
Strain Stress

The paper considers the current state of the mineral raw material base and the construction material market of the Rostov Region. The effect of various factors on the strain-stress behavior of local limestones has been investigated. The scientific and technical literary sources devoted to the processes of rock failure under various loads have been analyzed. The experimental studies have shown that the tested samples of limestone with a high content of cuboidal grains have characteristics comparable to those of the crushed granite stone. It has been concluded that the use of the Rostov Region limestones in the construction industry is competitive and feasible, provided the proper implementation of the engineering measures proposed in their production.

Transport security of the oil and gas complex of the regions of East Siberia

2020 ◽  
Author(s):  
Ekaterina A. Zemnukhova ◽  
◽  
Mikhail V. Mishenin ◽  
Keyword(s):  
Oil And Gas ◽  
Comprehensive Analysis ◽  
The State ◽  
Raw Material ◽  
Material Base ◽  
Eastern Siberia ◽  
East Siberia ◽  
Current State ◽  
Low Degree ◽  
The Republic

The article considers a comprehensive analysis of the oil and gas complex of the regions of Eastern Siberia and the Republic of Sakha (Yakutia). The features of the structure of the raw material base were revealed – a low degree of exploration and the rate of reproduction of stocks, imbalance in categories of stocks. The state of oil production in the region with differentiation by field is presented, the current state and prospects of expansion of the ESPO pipeline are analyzed.

scholarly journals Functioning of food enterprises in the context of export development policies implementation

2020 ◽  
Vol 11 (31) ◽  
pp. 119-130
Author(s):  
Marat Mirsayafovich Galeev ◽  
Alexander Sergeevich Baleevskikh
Keyword(s):  
Policy Implementation ◽  
Food Industry ◽  
Import Substitution ◽  
Raw Material ◽  
Material Base ◽  
Export Activity ◽  
Current State ◽  
Development Policies ◽  
Regional Development Policies ◽  
Egg Products

The article describes the development trends of the modern poultry product subcomplex as a raw material base for food industry and state export activity. Import substitution and increasing export volumes are a priority for the federal and regional development policies of Russia. In this regard, the aim of the study was to analyze the current state of food industry in the context of policy implementation of import substitution and export development. The achievement of the set goal was disclosed by solving several interrelated tasks: 1) analysis of resources of food products (eggs and egg products) and their use; 2) identification of a hidden correlation between indicators “production” and “import”; 3) identification of a hidden correlation between indicators “production” and “export”. We hypothesized that indicators “production” and “export” of agri-food are directly correlated. Studies to identify hidden correlation dependencies have shown that there is a direct correlation between indicators “production” and “import”. Indicators “production” and “export” don’t have dependencies and influence on each other, therefore an increase in production doesn’t affect the direct export of eggs from the country.

scholarly journals Potential of Jerusalem Artichoke Stem for Cellulose Production

2019 ◽  
Vol 21 (2) ◽  
pp. 173 ◽  
Author(s):  
A.N. Prusov ◽  
S.M. Prusova ◽  
A.G. Zakharov ◽  
A.V. Bazanov ◽  
V.K. Ivanov
Keyword(s):  
Jerusalem Artichoke ◽  
Nitrogen Adsorption ◽  
Raw Material ◽  
Cellulose Content ◽  
Material Base ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
Cellulose Production ◽  
The Stability ◽  
Potential Opportunity

There is a potential opportunity to convert almost any type of biomass into biofuel and bio- nanomaterials, if the appropriate biotechnological and chemical processing methods are used. The preference for this or that bioresource is due to the stability of the raw material base and the prospect of its use. Jerusalem artichoke stem (Helianthus tuberosus L.) (JA) is widely known as a potential non-food raw material for biofuels due to high biomass extraction (36–49 t/ha (tons per hectare)) and limited cultivation requirements. But little attention is given to study the possibility of using the stems to produce various kinds of cellulose. This article presents samples of cellulose that were obtained from the Jerusalem artichoke stem using mechanical and chemical methods. Cellulose yield from the stem was: cortex 51.1%, pith 65.2% with the α-cellulose content 96–98%. Methods of electron microscopy, atomic absorption, IR spectroscopy, X-ray diffraction, BET for nitrogen adsorption, thermogravimetry were used to study the cortex and the pith of the Jerusalem artichoke stem. Analysis of the cellulose samples confirmed the possibility of obtaining high-quality cellulose.

scholarly journals ANALYSIS OF GRAPHITE MINERAL-ROW MATERIAL BASE OF THE UKRAINIAN SHIELD USING ECONOMIC METHODS

2021 ◽  
pp. 70-80
Author(s):  
N.М. Lyzhachenkо
Keyword(s):  
Rapid Assessment ◽  
Economic Value ◽  
Raw Material ◽  
Ukrainian Shield ◽  
Mineral Deposits ◽  
Material Base ◽  
Rational Development ◽  
Economic Methods ◽  
Qualitative Characteristics ◽  
Mineral Base

The analysis of the mineral base of graphite of the Ukrainian shield with the use of geological and economic eassessment methods was carried out. Directions of the rational development are outlined. The main problems of sustainable development of graphite mineral raw-material base in modern conditions are determined. Geological and technological factors of economic value of graphite deposits and occurrences are characterized. A scheme of comparative assessment estimation of graphite deposits was proposed. This scheme allows to establish the most promising objects for further exploration in the initial stages of mineral deposits prospecting. The analysis includes the main geological, economic, technological and industrial factors of economic value of graphite deposits, such as reserves / resources, graphite content in ores, depth of ores, exploration degree and complexity of the deposit and others. The following methods were used in the work: the method of rapid assessment of the minerals value for determining the potential economic value of objects and the method of scoring. At the first stage, the deposits and occurrences included in the state balance, were ranked according to geological and industrial parameters. Each of the parameters rated according to its qualitative characteristics. The number of points obtained for graphite deposits with proven development efficiency (Burtynske, Balakhivske) and the developed field (Zavalivske) were used as optimal indicators. According to them, the most promising for further exploration works graphite occurrences with the best geological and industrial indicators were selected. The commodity value of these deposits was calculated using the method of coefficients. The results of the calculation were also taken into account for determining the most promising deposits for investment. According to the obtained data, a map of potentially promising graphite deposits of the Ukrainian shield was constracted.

scholarly journals Actual situation and prospects for the development of the phosphate-raw material base of Russia

2020 ◽  
Vol 21 (3) ◽  
pp. 197-207
Author(s):  
Alexey F. Georgievskiy ◽  
Viktoriya M. Bugina
Keyword(s):  
Economic Development ◽  
Russian Far East ◽  
Far East ◽  
Raw Material ◽  
Mineral Fertilizers ◽  
Material Base ◽  
Resource Base ◽  
Current State ◽  
Foreign Countries ◽  
Phosphate Raw Material

The article analyzes the state of the phosphate raw material base in Russia and its role in the economic development of the country and in domestic agriculture especially. The problems that prevent the creation of a modern powerful phosphate production capable of satisfying the existing demands of agriculture in phosphoric mineral fertilizers are highlighted. The possible directions of the development of the phosphorus industry in the regions for the near and distant prospects are analyzed. The aim of the article is to analyze the current state of the domestic mineral resource base to produce phosphorus fertilizers, the acute shortage of which hinders the development of the country's agriculture. Actual base for research was mainly processed materials from specialized scientific articles and publicly available publications. In addition, data collected by the authors during thirty years of studying phosphorite deposits in Russia and foreign countries were involved. The analysis of published materials of leading Russian producers of phosphorus products, mining companies, databases of specialized federal and regional geological companies. It is concluded that before the country's geological services, the most important task remains to identify deposits of high-quality phosphate ores, and especially in Siberia and the Russian Far East. Significant prospects for the development of these regions are opened by the Northern Sea Route. The planned pace of its development offers unique opportunities for the economic development of the Taimyr-Anabar region, where huge resources of apatite-bearing carbonatites of the Tomptor alkaline massif and Meimech-Kotuy province are concentrated.

Choice of Efficient Technology for Aged Enrichment Tailings Processing

2019 ◽  
Vol 946 ◽  
pp. 558-563
Author(s):  
Almaz Kozhonov ◽  
Zheenayym Maymanova ◽  
Aleksei Kritskii
Keyword(s):  
Appropriate Technology ◽  
Gravity Separation ◽  
Raw Material ◽  
Material Base ◽  
Initial Material ◽  
Efficient Technology ◽  
Waste Products ◽  
Enrichment Plant

The article is devoted to the development of an efficient technology for the processing of aged tailings of the «Solton-Sary» enrichment plant in Kyrgyzstan. Based on the detailed investigation of initial material, authors select most appropriate technology for processing of technogenic material, considering through gravity separation, flotation and hydrometallurgical methods of processing. The methods of sequential gravity separation/flotation scheme of enrichment and direct cyanidation of initial ore at different regimes are analyzed; advantages of aged tailings agitation leaching are established. Research, presented in the article, could be useful for enrichment plants, which are developing technologies of the waste products processing in order to increase the raw material base.

Man-Made Waste as a Raw Material Base for the Production of Modern Construction Composites

2019 ◽  
Vol 23 (7) ◽  
pp. 31-35
Author(s):  
M.S. Saydumov ◽  
S.-A.Y. Murtazaev ◽  
A.Kh. Alaskhanov ◽  
I.S. Dagin ◽  
M.R. Nakhayev
Keyword(s):  
Building Materials ◽  
Materials Science ◽  
Raw Materials ◽  
Construction Materials ◽  
Raw Material ◽  
Chemical Compositions ◽  
Material Base ◽  
Secondary Products ◽  
Natural Sand ◽  
Technogenic Raw Materials

The results of tests of secondary construction materials derived from man-made materials are presented. The granulometric and chemical compositions of secondary products from technogenic raw materials are investigated. The analysis of local natural and man-made raw materials base of the Chechen Republic. The possibilities of using local natural raw materials (crushed stone from gravel, natural sand, gravel, gypsum, cement, etc.) in the technology of building composite materials are shown. The suitability and efficiency of the use of technogenic raw materials in concrete and mortar technology, justified by the complex economic and environmental effect of its use in the practice of building materials science, have been experimentally proved. It has been established that with the introduction of advanced innovations in the field of concrete science it is possible to produce competitive products that are not inferior to foreign analogues.

scholarly journals Creating Structured Hydrogel Microenvironments for Regulating Stem Cell Differentiation

Gels ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 47
Author(s):  
David K. Mills ◽  
Yangyang Luo ◽  
Anusha Elumalai ◽  
Savannah Esteve ◽  
Sonali Karnik ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Materials Science ◽  
Stem Cell Differentiation ◽  
Biochemical Properties ◽  
Cell Behavior ◽  
Current State ◽  
Physico Chemical ◽  
Cell Substrate ◽  
Hydrogel Composites

The development of distinct biomimetic microenvironments for regulating stem cell behavior and bioengineering human tissues and disease models requires a solid understanding of cell–substrate interactions, adhesion, and its role in directing cell behavior, and other physico-chemical cues that drive cell behavior. In the past decade, innovative developments in chemistry, materials science, microfabrication, and associated technologies have given us the ability to manipulate the stem cell microenvironment with greater precision and, further, to monitor effector impacts on stem cells, both spatially and temporally. The influence of biomaterials and the 3D microenvironment’s physical and biochemical properties on mesenchymal stem cell proliferation, differentiation, and matrix production are the focus of this review chapter. Mechanisms and materials, principally hydrogel and hydrogel composites for bone and cartilage repair that create “cell-supportive” and “instructive” biomaterials, are emphasized. We begin by providing an overview of stem cells, their unique properties, and their challenges in regenerative medicine. An overview of current fabrication strategies for creating instructive substrates is then reviewed with a focused discussion of selected fabrication methods with an emphasis on bioprinting as a critical tool in creating novel stem cell-based biomaterials. We conclude with a critical assessment of the current state of the field and offer our view on the promises and potential pitfalls of the approaches discussed.

CURRENT STATE OF THE RESOURCE BASE OF COAL MINING INDUSTRY IN KUZBASS

2020 ◽  
Vol 2 (1) ◽  
pp. 191-201
Author(s):  
S.V. SHAKLEIN ◽  
◽  
M.V. PISARENKO ◽  
◽  
Keyword(s):  
Coal Mining ◽  
Mining Industry ◽  
Coal Industry ◽  
Raw Material ◽  
Open Pit ◽  
Open Pit Mining ◽  
Material Base ◽  
Resource Base ◽  
Current State ◽  
Production Technologies

Analysis of the grade composition of the mineral resource base of the distributed and undistributed subsoil Fund as of 01.01.2018 showed a decrease in reserves of coal intended for open pit mining. In the future, the production of a number of technological grades of coal (gas fat (GZh), fat (Zh), coking fat (KZh), coking (K), coking caking low-metamorphized (KCN), coking caking (KC), lean caking (OC), low caking (CC) is possible only by underground method. The expansion of the raw material base of the Kuzbass coal industry and the support of coal production volumes, primarily by the technological of grades coking fat (KZh), coking (K), coking caking (KC), lean caking (OC), low caking (CC) involves exploration, the use of unconventional production technologies and tax preferences for coal mining enterprise

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