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Number of results: 10
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Abstract

Coal reserves in the Czech Republic are estimated to be 10 billion tons – hard coal about 37%, brown coal about 60% and lignite 3%. Hard coal is produced in Northern Moravia. In 2017 the production of hard coal was 5.5 million tons. Brown coal is mined in North-Western Bohemia − the production of brown coal in 2017 was 38.1 million tons. Significant quantities of hard coal are exported to: Slovakia, Austria, Germany and Hungary. In accordance with the National Energy Policy, coal will remain the main source of energy in the country in the future, despite the increased use of nuclear energy and natural gas. The government expects that in 2030 energy from coal will account for 30.5% of energy produced. There are five coal companies in the Czech Republic: OKD, a.s., the only hard coal producer and four brown coal mining companies: Severočeské Doly a.s., owned by ČEZ, the largest producer of brown coal, Vršanská uhelná a.s., with coal resources until 2055, Severní energetická a.s. with the largest brown coal reserves in the Czech Republic and Sokolovska uhelná a.s., the smallest mining company extracting lignite. OKD operates coal in two mines Kopalnia Důlní závod 1 – (consists of three mines: ČSA Mine, Lazy Mine, Darkov Mine) and Mine Důlní závod 2 (ttwo mines Sever, Jih). The article also presents a pro-ecological solution for the management of waste heaps after coal enrichment – a plant for the enrichment of coal waste from the Hermanice heap.
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Abstract

According to International Energy Agency (IEA) energy security is the continuous supply of energy at acceptable prices. National energy is based primarily on its own energy resources such as hard coal and brown coal. The 88% of electric energy production from these minerals gives us full energy independence. Additionally, the energy production costs from these raw materials are the lowest compared to other technologies. Of these two, the energy produced from brown coal is characterized by the lowest unit technical generating cost. Poland has the resources of these minerals for decades to come, the experience related to mining and processing them, scientific and design facilities and technical facilities and factories producing machines and equipment for their own needs, as well as for export. Coal is and should remain an important source of electricity and heat supply in Poland for the next 25–50 years. It is one of the most reliable and profitable energy sources. This policy may be difficult in the next decades due to the exhaustion of the available resources of hard and brown coal. The conditions for the construction of new mines, and thus for the development of coal mining in Poland, are very interdisciplinary in legal, environmental, economic and reputational terms. Germany has similar problems. Despite the fact that it is an image of a country investing in renewable energy sources, which are pioneers of energy production from RES, in reality hard and brown coal are still the primary sources utilized to produce electric energy.
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Abstract

Australia to kraj bardzo bogaty w zasoby naturalne. Jest znaczącym eksporterem rud żelaza, boksytów, miedzi, złota, niklu oraz cynku. Kraj ten eksportuje także rudy uranu czy też węgiel kamienny i gaz ziemny. We własnym zakresie wykorzystuje również surowiec energetyczny, jakim jest węgiel brunatny. Podobnie jak w Polsce, służy on do produkcji energii elektrycznej zapewniając przy tym bezpieczeństwo energetyczne państwa. Pomimo znacznej odległości dzielącej te dwa kraje, mają one ze sobą wiele wspólnego. Zarówno Australia, jak i Polska opiera swoją elektroenergetykę w większości na rodzimych zasobach węgla kamiennego i brunatnego. Obydwa kraje osiągnęły także zbliżony poziom udziału OZE w miksie energetycznym. Podobny jest również poziom rocznego wydobycia węgla brunatnego. W artykule dokonano porównania górnictwa i energetyki opartej na węglu brunatnym w Australii i w Polsce. Analiza dotyczy ostatnich 20 lat, przy czym szczególną uwagę zwrócono na zmiany, jakie zaszły w tej branży po 2010 roku. Wskazano podobieństwa i różnice występujące w obydwu krajach w zakresie warunków geologiczno-górniczych wydobycia węgla brunatnego oraz jednostkowej efektywności i emisji dwutlenku węgla podczas produkcji energii elektrycznej. Opisano także stan i perspektywy rozwoju trzech kompleksów górniczo-energetycznych węgla brunatnego zlokalizowanych w Latrobe Valley w stanie Wiktoria w południowo-wschodniej Australii.
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Abstract

The paper presents brown coal as one of the two basic domestic energy raw materials apart from hard coal. Historically, the use of brown coal in Poland is primarily fuel for the power plants. It was used for the production of lignite briquettes in small quantities and as fuel for local boiler houses and as an addition to the production of fertilizers (Konin and Sieniawa). At present, after changes in the case of the quality of fuels used in local boiler plants, brown coal remains as a fuel for the power plants in almost 100%. Currently, the brown coal industry produces about 35% of the cheapest electricity. The cost of electricity production is more than 30% lower than the second basic fuel – hard coal. The existing fuel and energy complexes using brown coal, with the Bełchatów complex at the forefront, are now an important guarantor of Poland’s energy security. In contrast to the other fuels such as: oil, natural gas or hard coal, the cost of electricity production from brown coal is predictable in the long term and almost insensitive to fluctuations in global commodity and currency markets. Its exploitation is carried out using the high technological solutions and respecting all environmental protection requirements, both in the area of coal extraction and electricity generation. Importantly, the fuel and energy complexes using brown coal showed a positive profitability so far and generated surpluses enabling the financing of maintenance and development investments, also in other energy segments. In particular, the sector did not require and has yet not benefited from public aid in the form of, for example, subsidies or tax concessions. Polish brown coal mining has all the attributes necessary for long-term development to ensure the country’s energy security. The document which is a road map for the brown coal industry is the Program for the Brown Coal Mining Sector in Poland adopted by the Council of Ministers on May 30, 2018. The Program covers the years 2018–2030 with a perspective up to 2050 and presents the development directions of the brown coal mining sector in Poland together with the objectives and actions necessary to achieve them. The Program presents a strategy for the development of brown coal mining in Poland in the first half of the 21st century. Possible scenarios have developed in active mining and energy basins as well as in new regions with significant resources of this mineral. This is to enable the most efficient use of deposits in the Złoczew and Konin regions as well as the Gubin and Legnica brown coal basins, and then deposits located in the Rawicz region (Oczkowice) as well as other prospective areas that may eventually replace the existing active mining and energy areas. This will allow power plants to continue to produce inexpensive and clean electricity, using the latest global solutions in the field of clean coal technologies.
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Abstract

The national power industry is based primarily on its own energy mineral resources such as hard and brown coal. Approximately 80% of electrical energy production from these minerals gives us complete energy independence and the cost of its production from coal is the lowest in comparison to other sources. Poland has, for many decades had vast resources of these minerals, the experience of their extraction and processing, the scientific-design facilities and technical factories manufacturing machines and equipment for own needs, as well as for export. Nowadays coal is and should be an important source of electrical energy and heat for the next 25–50 years, because it is one of the most reliable and price acceptable energy sources. This policy may be disturbed over the coming decades due to the depletion of active resources of hard and brown coal. The conditions for new mines development as well as for all coal mining sector development in Poland are very complicated in terms of legislation, environment, economy and image. The authors propose a set of strategic changes in the formal conditions for acquiring mining licenses. The article gives a signal to institutions responsible for national security that without proposed changes implementation in the legal and formal process it, will probably not be possible to build next brown coal, hard coal, zinc and lead ore or other minerals new mines.
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Abstract

The article characterizes geological formations occurring in the Polish lignite deposits having the characteristics of raw materials, i.e. accompanying minerals, giving their location, quality characteristics, estimated resources and potential applications. Attention has also been paid to the economic suitability, e.g. in infrastructure works and for the reclamation of many geological formations found in the overburden, classified as so-called earth or rock mass. There are also raw materials of sorption properties representing a huge potential source of minerals valuable for the economy and environmental protection. This refers to e.g.: beidellite clays from Bełchatów, Poznań clays from the region of Konin and Adamów, lacustrine chalk from Bełchatów, as well as Mesozoic limestone from the lignite bedding in Bełchatów. The reasons for the unsatisfactory use of accompanying minerals have been given. The authors described the methods used in the mining operation and processing of associated minerals, also applicable in Poland, as the legal basis for the extraction of these minerals and the economic and financial conditions. They stressed the need to protect mined not associated minerals used by the construction of anthropogenic deposits. This activity primarily requires regulating the legal status of these deposits and the development and application of an economic and financial system that stimulates the economy of these minerals. In summary, the necessary actions were taken to increase the use of the accompanying minerals and their contribution to the balance of mineral resources in the country.
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Abstract

The exploitation and processing of lignite in the Bełchatów region is connected with the formation of various mineral waste materials: varied in origin, mineral and chemical composition and raw material properties of the accompanying minerals, ashes and slags from lignite combustion and reagipsum from wet flue gas desulphurisation installations. This paper presents the results of laboratory tests whose main purpose was to obtain data referring to the potential use of fly ashes generated in the Bełchatów Power Plant and selected accompanying minerals exploited in the Bełchatów Mine in the form of self-solidification mixtures. The beidellite clays were considered as the most predisposed for use from the accompanying minerals , due to pozzolanic and sorption properties and swelling capacity. Despite the expected beneficial effects of clay minerals from the smectite group on the self-settling process as well as the stability of such blends after solidification, the results of physical-mechanical tests (compressive strength and water repellence) were unsatisfactory. It was necessary to use Ca (OH)2, obtained from the lacustrine chalk as an activator of the self-settling process It was necessary to use lacustrine chalk as an activator of the self-solidification process. The presence of calcium will allow the formation of cement phases which will be able to strongly bond the skeletal grains. Also, the addition of reagipsum to the composition of the mixture would contribute to the improvement of the physico-mechanical parameters. The elevated SO4 2– ion in the mixture during the solidification allows for the crystallization of the sulphate phases in the pore space to form bridges between the ash and clay minerals. The use of mixtures in land reclamation unfavourably transformed by opencast mining in the Bełchatów region would result in measurable ecological and economic benefits and would largely solve the problem of waste disposal from the from the operation and processing of lignite energy.
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Abstract

Significant quantities of coal sludge are created during the coal enrichment processes in the mechanical processing plants of hard coal mines (waste group 01). These are the smallest grain classes with a grain size below 1 mm, in which the classes below 0.035 mm constitute up to 60% of their composition and the heat of combustion is at the level of 10 MJ/kg. The high moisture of coal sludge is characteristic, which after dewatering on filter presses reaches the value of 16–28% (Wtot r) (archival paper PG SILESIA). The fine-grained nature and high moisture of the material cause great difficulties at the stage of transport, loading and unloading of the material. The paper presents the results of pelletizing (granulating) grinding of coal sludge by itself and the piling of coal sludge with additional material, which is to improve the sludge energy properties. The piling process itself is primarily intended to improve transport possibilities. Initial tests have been undertaken to show changes in parameters by preparing coal sludge mixtures (PG SILESIA) with lignite coal dusts (LEAG). The process of piling sludge and their mixtures on an AGH laboratory vibratory grinder construction was carried out. As a result of the tests, it can be concluded that all mixtures are susceptible to granulation. This process undoubtedly broadens the transport possibilities of the material. The grain composition of the obtained material after granulation is satisfactory. Up to 2 to 20 mm granules make up 90–95% of the product weight. The strength of the fresh pellets is satisfactory and comparable for all mixtures. Fresh lumps subjected to a test for discharges from a height of 700 mm can withstand from 7 to 14 discharges. The strength of the pellets after longer seasoning, from the height of 500 mm, shows different values for the analyzed samples. The values obtained for hard coal sludge and their blends with brown coal dust are at the level from 4 to 5 discharges. The strength obtained is sufficient to determine the possibility of their transport. At this stage of the work it can be stated that the addition of coal dust from lignite does not cause the deterioration of the material’s strength with respect to clean coal sludge. Therefore, there is no negative impact on the transportability of the granulated material. As a result of mixing with coal dusts, it is possible to increase their energy value (Klojzy-Karczmarczyk at al. 2018). The cost analysis of the analyzed project was not carried out.
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Abstract

Bezpieczeństwo energetyczne jest jednym z najważniejszych elementów bezpieczeństwa państwa. W perspektywie najbliższych lat sektor energetyczny w Polsce stoi przed poważnymi wyzwaniami. Zapotrzebowanie na energię elektryczną systematycznie wzrasta, natomiast poziom rozwoju infrastruktury wytwórczej i przesyłowej nie nadąża za tymi zmianami. Przyszłość i rozwój energetyki to jeden z najważniejszych problemów w polityce krajowej. Odpowiedzialność sektora energetycznego za zmiany klimatyczne na Ziemi oraz troska o zapewnienie wystarczających ilości energii w najbliższych latach, stanowią główne wyzwania, jakie stoją obecnie przed energetyką. Problemy, z którymi ma zmierzyć się obecnie polski przemysł elektroenergetyczny, wymuszają podjęcie działań zmierzających w kierunku rozwoju i budowy nowych technologii wytwórczych. Eksploatowane w Polsce elektrownie węglowe są źródłem stabilnych i ciągłych dostaw energii. Wobec braku odpowiednich zdolności magazynowania energii, utrzymywanie jednostek konwencjonalnych staje się kwestią kluczową. Jest to istotne z punktu widzenia utrzymania bezpieczeństwa energetycznego, zwłaszcza wobec konieczności rozwoju źródeł odnawialnych, szczególnie tych o niestabilnym i stochastycznym charakterze pracy. W referacie przedstawiono stan obecny i przyszły krajowego sektora wytwórczego. W perspektywie najbliższych kilkunastu lat będzie się on opierał na energetyce konwencjonalnej, jednak z coraz większym udziałem źródeł odnawialnych. Konieczne jest zatem opracowanie nowej strategii energetycznej, która wskaże, w jakim kierunku będzie zmierzać krajowy sektor wytwórczy. Jest to tym bardziej istotne, że nowe uwarunkowania prawne związane szczególnie z ochroną środowiska zdecydowanie ograniczają stosowanie paliw konwencjonalnych w energetyce. Kierunki rozwoju energetyki są kreowane przede wszystkim przez wymagania, jakie stawiają nowe regulacje prawne Unii Europejskiej. Obecna polityka klimatyczno-energetyczna UE oddziałuje głównie na energetykę węglową, nakładając obowiązek zmniejszenia emisji gazów cieplarnianych. Wymóg ten stawia polską gospodarkę energetyczną w szczególnie trudnej sytuacji. Przeszkodę w realizacji dotrzymania standardów unijnych w sektorze wytwórczym stanowi wysoki stopień zależności od węgla. Paliwo węglowe pokrywa podstawę obciążenia w krajowym systemie energetycznym. Dlatego też w najbliższych latach nie jest możliwe całkowite odejście od energetyki węglowej z uwagi na zaspokojenie potrzeb na energię elektryczną i ciepło, a przede wszystkim z uwagi na bezpieczeństwo energetyczne kraju.
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Abstract

Przyszłość i rozwój energetyki to jeden z najważniejszych problemów zarówno w polityce krajowej, jak i światowej. Odpowiedzialność sektora energetycznego za zmiany klimatyczne na Ziemi oraz troska o zapewnienie wystarczających ilości energii w najbliższych latach, stanowią główne wyzwania, jakie stoją obecnie przed energetyką. Eksploatowane w Polsce elektrownie węglowe są źródłem stabilnych i ciągłych dostaw energii. Idealnie sprawdzają się jako jednostki rezerwowe dla źródeł odnawialnych. Wobec braku odpowiednich zdolności magazynowania energii, utrzymywanie w gotowości jednostek konwencjonalnych staje się w kontekście utrzymania bezpieczeństwa energetycznego kwestią kluczową. W referacie przedstawiono stan obecny krajowego sektora wytwórczego. W perspektywie najbliższych kilkunastu lat dalej będzie się on opierał na energetyce konwencjonalnej, jednak z coraz większym udziałem źródeł odnawialnych. Konieczne jest jednak opracowanie nowej strategii energetycznej, która wskaże, w jakim kierunku będzie zmierzać krajowy sektor wytwórczy. Jest to tym bardziej istotne, że nowe uwarunkowania prawne związane szczególnie z ochroną środowiska zdecydowanie ograniczają stosowanie paliw konwencjonalnych w energetyce.
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