scholarly journals Application prospects of Irkutsk region thermal coals

2021 ◽  
Vol 24 (6) ◽  
pp. 1271-1284
Author(s):  
L. N. Takaishvili ◽  
G. V. Agafonov
Keyword(s):  
Power Plants ◽  
System Analysis ◽  
Raw Materials ◽  
Thermal Power ◽  
Electrical Energy ◽  
Raw Material ◽  
Coal Consumption ◽  
Long Run ◽  
Irkutsk Region ◽  
Coal Chemistry

The purpose of the paper is to assess application directions and prospects of Irkutsk region power generating coals for the needs of electric and heat power engineering with regard to the possible export of elect rical energy to the countries of South-East Asia, and use as raw materials for coal chemistry needs. The research is carried out using the methods of system analysis involving analysis and synthesis, formalization and concretization, structuring and restructuring, classification. It is the first time when the category of local power generating coals is distinguished under the analysis of the balance reserves of thermal coals. Their feature is low-quality and remoteness from settlements and transportation lanes. Their resource estimate is also given – 0.54 billion tons. An estimate of the recoverable reserves of local coals is obtained: it is 260 million tons. The potential level of local coal production is calculated. A retrospect of consumption trends of regional thermal coals is given and possible application directions are considered in the long run. It is shown that the most demanded direction is the use of coals for energy needs, mainly at thermal power plants. The calculated volumes of coal consumption of two export TPPs, Mugunskaya and Ishideiskaya, are respectively 11 and 6 million tons. According to the authors' calculations, the percentage of electrical energy generation at coal -fired TPPs depending on its export variant implementation can increase by 1.5 – 2.1 times as compared with the level of 2019. Availability of significant reserves of power generating coals in the region makes them a reliable source of energy resources for the electric and thermal power industry, including the export of electrical energy and a promising raw material for the needs of coal chemistry. Potential capacity of coal mining is estimated at 50-60 million tons per year, including 6.5 million tons of local coals. Production potential of coal significantly exceeds its demand both at present and in the future.

Al-rich industrial residues for mineral binders in ESEE region

2020 ◽  
Author(s):  
Katarina Šter ◽  
Sabina Kramar
Keyword(s):  
Power Plants ◽  
Raw Materials ◽  
Gamma Spectroscopy ◽  
Thermal Power ◽  
Raw Material ◽  
Recycling Rate ◽  
Low Carbon ◽  
X Ray ◽  
Industrial Residues ◽  
Essential Components

<p>Al-rich mineral resources are one of the essential components for the production of the novel sustainable mineral binders. Belite-sulfoaluminate (BCSA) cements, which are considered as low-carbon and low-energy, allows the substitution of natural raw materials with secondary ones. In East-Southeast European countries (ESEE) there are huge amounts of various industrial and mine residues that are either landfilled or currently have a low recycling rate. These residues are generated from mining activities (mine waste) and as a by product of different types of industry, such as thermal power plants, steel plants or the aluminium industry (slags, ashes, red mud, etc.). Within the framework of the RIS-ALiCE project, in cooperation with 15 project partners from Slovenia, Austria, France, Hungary, Serbia, Bosnia and Herzegovina and Macedonia, a network of relevant stakeholders has been established in the field of currently unused aluminium-containing mine and industrial residues. Inside the created network mine and industrial residues have been mapped and valorised in order to evaluate their suitability for the use in innovative and sustainable low CO<sub>2</sub>-mineral binder production. Aluminium-containing residues are characterized with respect to their chemical, physical and radiological composition using different analytical methods such as X ray fluorescence spectroscopy, ICP optical emission spectrophotometry, gravimetry, X ray powder diffraction, gamma spectroscopy, etc. The long-term activity of network between wastes holders/producers and mineral end users will be enabled via developed Al-rich residues registry, including a study of the potential technological, economic and environmental impacts of applying the innovative methodology of the sustainable secondary raw materials management in ESEE region. Developed registry with the data valuable for both, waste providers as waste users in ESEE region, can be later-on upscaled also to other regions of Europe. It will provide the data on the available and appropriate Al-rich secondary resources, which will enablethe production of innovative low-CO<sub>2 </sub>cements.</p><p><strong>Keywords:</strong> secondary raw material, alternative binders, Al-rich residues, networking, mapping, valorisation, registry.</p>

scholarly journals Integrated use of technogenic raw materials in cement technology

2021 ◽  
pp. 19-24
Author(s):  
L.P. Chernyak ◽  
L.I. Melnyk ◽  
N.O. Dorogan ◽  
I.A. Goloukh
Keyword(s):  
Standardized Testing ◽  
Rice Husk ◽  
Power Plants ◽  
Raw Materials ◽  
Thermal Power ◽  
Raw Material ◽  
Cement Clinker ◽  
Material Base ◽  
Chemical Research ◽  
Technogenic Raw Materials

This work used a combination of modern physico-chemical research methods with standardized testing of technological and operational properties of raw materials, clinker, cement and compositions with its application. Results over of research of the silicate systems with rice husk and ash-fly as technogenic raw material for making of cement clinker are driven. The features of the chemical-mineralogical composition, phase transformations during burning and astringent properties of material at the use of 42,5-50,5 % industry wastes in composition initial raw material mixtures are shown. The object of the study were raw material mixtures for the production of Portland cement clinker based on the systems of chalk - clay - man-made raw materials and chalk - man-made raw materials. The possibility of replacing exhaustible and non-renewable natural raw materials with a complex of multi-tonnage wastes of agro-industry and heat energy, which meets the objectives of expanding the raw material base of cement production, resource conservation and environmental protection. Peculiarities of phase formation during firing of silicate systems of chalk-polymineral clay and chalk-technogenic raw materials taking into account changes in the quantitative ratio of components, in particular rice husk and ash-removal of thermal power plants are noted.

scholarly journals Geopolymers based on plasma incineration waste as a material for circular economy

2021 ◽  
Vol 942 (1) ◽  
pp. 012008
Author(s):  
K Plawecka ◽  
B Figiela ◽  
A Grela ◽  
K E Buczkowska
Keyword(s):  
Circular Economy ◽  
Power Plants ◽  
Waste Treatment ◽  
Raw Materials ◽  
Thermal Power ◽  
Mineralogical Composition ◽  
Raw Material ◽  
Waste Materials ◽  
Treatment Technology ◽  
Incineration Plant

Abstract Plasma waste treatment technology is one of the promising methods of reducing problematic waste, but the technology itself create other kind of waste that must be effectively used to recognize this technology as a suitable for circular economy. The aim of the article is to show the possibility of using waste materials from a plasma incineration plant as a raw material for the production of geopolymeric materials. The samples were made based on waste from plasma incineration plant in Liberec (Czech Republic), fly ash from thermal power plants in Skawina (Poland) and sand mixed with an aqueous chemical solution. Next they mechanical properties, microstructure and mineralogical composition have been investigated. The results show the combination of these raw materials can increase the strength of the material and, consequently find applications in the utilization of plasma incineration waste. The article show the geopolymerization could be effective process for using waste materials from a plasma incineration plant as a raw material for creating the products for construction industry.

Power Cycles of Generation III and III+ Nuclear Power Plants

2014 ◽  
Author(s):  
Alexey Dragunov ◽  
Eugene Saltanov ◽  
Igor Pioro ◽  
Pavel Kirillov ◽  
Romney Duffey
Keyword(s):  
Renewable Energy ◽  
Natural Gas ◽  
Thermal Efficiency ◽  
Nuclear Power ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Electrical Energy ◽  
Energy Sources ◽  
Thermal Power Plants

It is well known that the electrical-power generation is the key factor for advances in any other industries, agriculture and level of living. In general, electrical energy can be generated by: 1) non-renewable-energy sources such as coal, natural gas, oil, and nuclear; and 2) renewable-energy sources such as hydro, wind, solar, biomass, geothermal and marine. However, the main sources for electrical-energy generation are: 1) thermal - primary coal and secondary natural gas; 2) “large” hydro and 3) nuclear. The rest of the energy sources might have visible impact just in some countries. Modern advanced thermal power plants have reached very high thermal efficiencies (55–62%). In spite of that they are still the largest emitters of carbon dioxide into atmosphere. Due to that, reliable non-fossil-fuel energy generation, such as nuclear power, becomes more and more attractive. However, current Nuclear Power Plants (NPPs) are way behind by thermal efficiency (30–42%) compared to that of advanced thermal power plants. Therefore, it is important to consider various ways to enhance thermal efficiency of NPPs. The paper presents comparison of thermodynamic cycles and layouts of modern NPPs and discusses ways to improve their thermal efficiencies.

Supplier Selection Criterion for SSCM in Indian Thermal Power Plant

2019 ◽  
pp. 240-257
Author(s):  
Suchismita Satapathy
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Selection Criterion ◽  
Raw Material ◽  
Thermal Power Plants ◽  
Whole Process ◽  
Main Motive

All companies are dependent on their raw material providers. The same applies in the case of thermal power plants. The major raw material for a thermal power plant is the coal. There are a lot of companies which in turn provide this coal to the thermal power plant. Some of these companies are international; some are local, whereas the others are localized. The thermal power plants look into all the aspects of the coal providing company, before settling down for a deal. Some people are specifically assigned to the task of managing the supply chain. The main motive is to optimize the whole process and achieve higher efficiency. There are a lot of things which a thermal power plant looks into before finalizing a deal, such as the price, quality of goods, etc. Thus, it is very important for the raw material providers to understand each and every aspect of the demands of the thermal power plant. A combination of three methods—Delphi, SWARA, and modified SWARA—has been applied to a list of factors, which has later been ranked according to the weight and other relevant calculations.

The Suitability of Fly Ash for Use in Concrete According to EN 450 Based on their Particle Size

2018 ◽  
Vol 276 ◽  
pp. 110-115
Author(s):  
Martin Ťažký ◽  
Martin Labaj ◽  
Rudolf Hela
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Catalytic Reduction ◽  
Raw Materials ◽  
Thermal Power ◽  
Combustion Process ◽  
Thermal Power Plants ◽  
Mechanical Parameters ◽  
Fly Ashes ◽  
The Impact

The by-products of energy industry are nowadays often affected by new limits governing the production of harmful gases discharged into the air. These stricter and stricter criteria are often met by electricity producers by changing the combustion process in thermal power plants itself. Nowadays, the SNCR (selective non-catalytic reduction) application is quite common in the combustion process in order to help reduce the nitrogen oxide emission. This article deals with the primary measures of thermal power plants, which in particular consist of a modified treatment of raw materials (coal) entering the combustion process. These primary measures then often cause the formation of fly ash with unsuitable fineness for the use in concrete according to EN 450. The paper presents the comparison of the physico-mechanical parameters of several fly ashes with a different fineness values. The primary task is to assess the impact of non-suitable granulometry in terms of EN 450 on the other physico-mechanical parameters of fly ashes sampled within the same thermal power plant. Several fly ashes produced in the Czech Republic and surrounding countries were evaluated in this way.

Production of Ceramic Brick Based on Aluminum-Silicate Wastes

2016 ◽  
Vol 683 ◽  
pp. 156-161 ◽  
Author(s):  
Viktor A. Vlasov ◽  
Nelli K. Skripnikova ◽  
Ivan Yu. Yuriev ◽  
Pavel V. Kosmachev ◽  
Viktoria A. Litvinova ◽  
...  
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Experimental Studies ◽  
Raw Material ◽  
Optimum Operating ◽  
Aluminum Silicate ◽  
Operating Parameters ◽  
Chemical Compositions ◽  
Thermal Power Plants ◽  
Ceramic Brick

The paper focuses on the production of ceramic brick based on aluminum silicate waste generated by thermal power plants. The grain size and chemical compositions of the raw material are investigated. Experimental studies are carried out to identify optimum operating parameters of the ceramic brick production. It is shown that the use of aluminum silicate waste, namely, 40–60 % ash together with clay raw material allows obtaining ceramic brick possessing 20–25 MPa compressive strength, 10–15 % water absorption, and frost resistance of over 60 cycles.

Thermal Insulation Materials With High-Porous Structure Based on the Soluble Glass and Technogenic Mineral Fillers

2018 ◽  
Vol 7 (3.2) ◽  
pp. 692
Author(s):  
Dmytro Storozhenko ◽  
Oleksandr Dryuchko ◽  
Teofil Jesionowski
Keyword(s):  
Thermal Insulation ◽  
Power Plants ◽  
Building Materials ◽  
Thermal Power ◽  
Raw Material ◽  
Thermal Engineering ◽  
Preparation Methods ◽  
Insulation Materials ◽  
Soluble Glass ◽  
Study Results

The raw material mixture from the silicon-like technogenic component the ash-removal of thermal power plants and the preparation methods of  waterproof porous heat-insulated materials wide usage for raw mass hot foaming powdered two-stage technology are developed. The development uses the polyfunctional properties of liquid glass  as a) the binder component; c) breeder; c) the speed regulator of the clamping mass hardenin. Its optimized version begins to solidify at its usual temperature from the moment its "reproduction" is soluble glass and forms a paste-shaped cake with a set of properties necessary for the next fragmentation. The proposed formulation allows compositions processing in various ways, with the formation of granular heat-insulating fillers, materials for thermal insulation in complex structures, slab and shell-like types of thermal insulation materials. The task is set, depending on the goals and features of the tasks being solved; it is possible to conduct several different methods at the final stages of their obtaining. Two stages of the recycling process determine the character and behavior of the rare-glass composite systems constituent components during heat treatment, their strong adhesion to most structural materials and the need to solve billets easy removal problem from the molding unit. Study results can be used in the field of building materials production, in particular porous artificial products, in obtaining granular insulating material and light aggregate for concrete industrial and civil construction, in thermal engineering as thermal insulation, etc.   

scholarly journals Investigation of thermal power of reaction of titanium slag with sulphuric acid

2010 ◽  
Vol 8 (1) ◽  
pp. 149-154 ◽  
Author(s):  
Maciej Jabłoński
Keyword(s):  
Sulphuric Acid ◽  
Acid Concentration ◽  
Raw Materials ◽  
Thermal Power ◽  
Titanium Content ◽  
Raw Material ◽  
Titanium Slag ◽  
Dimension Of Particles ◽  
Size Of Particles ◽  
Sulphuric Acid Concentration

AbstractEnriched titanium raw materials with high titanium content called titanium slags are received by the electrothermal reduction of ilmenite. Titanium slags are most frequently used in the titanium dioxide industry. The reaction of titanium slags with sulphuric acid is strongly exothermic and creates danger of thermal explosion. Kinetics of this reaction depends on the parameters such as temperature of initiation, sulphuric acid concentration and dimension of particles of titanium slag. The reaction of titanium slag with sulphuric acid was investigated at non-isothermal conditions in a special construction calorimeter. The observed thermal power changes in the calorimeter (“calorimeter run”), are the basis for estimation of reaction kinetics. A proposed model describing the thermal power changes and taking into account the moment of initiation of reaction is presented. The calorimetric investigations showed, that reaction rate of titanium slags with sulphuric acid depends on initial temperature of reaction, size of particles of titanium raw material and sulphuric acid concentration.

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