A special feature of the Ptolemais lignite deposits is frequent alternation of horizontal lignite d

In 1939, with the publication of the report of the German Professor F. Kegel, manifests the first serious effort to utilize lignite industrial scale. The German professor, with poor technical equipment of that time, the estimated coal reserves of 6 billion tonnes. At that time, our country accounted for 95% of its energy needs from imports. The 1950 starts extensive prospecting in the search and evaluation of lignite mines and in 1956 officially begins the period of the lignite industry.
In September pressure unit conversion table 1956, the company LIPTOL SA (Ptolemais Mines chaired by Mr. Bodossakis signed a contract with the German company KHD for the construction of the first power plant lignite power 10 MW. Thereafter, the power stations proliferate while new mines opened pressure unit conversion table the shaft continuously Amyntaiou - Ptolemais Kozani. Lignite, our national fuel has now taken a leading position in our energy system.
The lignites and coals are generally the result of a singular decomposition of plants characterized by a particular term as The carbonation of Ptolemais lignite deposits formed during the Tertiary geological period, and is age 1-5000000 years. The area bounded today by the Abbey, Amyndeo, Florina, Kozani Ptolemais to Servia, millions of years ago, it was an area with scattered shallow lakes and marshes. The climatic conditions of the time favored pressure unit conversion table the development of aquatic plants and mainly reed and moss. When the plants dry up, fall in oxygen-poor water marshes and covered with mud. Furthermore, because of subsidence and sediment, plants covered by additional sedimentary deposits. The decomposition pressure unit conversion table of the plant was in a free environment pressure unit conversion table and air under pressure, while the presence of microorganisms in assisting the anaerobic fermentation. In the process of carbonation, escape into the atmosphere as oxygen, hydrogen and nitrogen, thus increasing the percentage of carbon pressure unit conversion table residues. Later new vegetation grew and the cycle repeated Over the newer layers pressure unit conversion table of lignite deposits earthen pressure unit conversion table materials, called "overburden". The thickness of the overlying material, sand, limestone and clay, ranging mines in Ptolemais from 12 to 200 meters. In addition, the deposit of lignite pressure unit conversion table is not uniform because just inside the deposit are the oldest earthen materials pressure unit conversion table called "intermediate." For the formation of a cubic meter of coal, calculated that a period 1000-4000 year.
In Western Macedonia produced annually about 60 million tonnes of lignite. Until today, 1.2 billion tonnes mined lignite, while the current technical and economic data, the remaining area of exploitable reserves pressure unit conversion table are estimated at 2.4 billion tonnes. The lignite activity grows at D. Macedonia and Megalopolis, Greece ranks in second place among lignitoparagogon countries of the European Union and the 5th worldwide.
The quality of Greek lignite is low. The average humidity of the Ptolemais lignite is 50-60%, ash 35% (dry basis) and the lower heating value 1.300 kcal / kg. Significant competitive advantage, however, over the security of supply, a low sulfur content.
A special feature of the Ptolemais lignite deposits is frequent alternation of horizontal lignite deposits and intermediate materials, referred to as "barren" or "infertile". The exploitation of lignite deposits is superficial, with the method of "good steps".
In a continuous pressure unit conversion table system that uses electrically skip excavation, conveyors and stackers, the deposit pressure unit conversion table of lignite excavated in layers. The extraction pressure unit conversion table of overburden and lignite then becomes large electric pressure unit conversion table machines pressure unit conversion table continuous pressure unit conversion table operation bucket backhoe. Since the materials pressure unit conversion table are mined, while the lignite is transported to the power stations, and the supernatants and intermediate materials transported and deposited mainly in areas where mining has preceded, that after the end of the holding, the impact on the landscape of the region is minimal .
The transportation of coal and gangue, is the conveyors that can carry continuously over long distances large quantities of materials. Finally, the deposition pressure unit conversion table of waste rock materials in areas where apolifthei lignite becomes pressure unit conversion table large electric machines - the continuing operation called pits.
Apart from the main equipment, pressure unit conversion table mining and management of less