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Öğe Bricks manufactured from colliery wastes: A case study(2006) Sensogut C.; Ozdeniz A.H.A considerable part of the overburden spoil at the Western open cast working sites of the Tuncbilek Colliery, Western Lignite Corporation, consists of marl series. Some artificial mountains have been formed in the region as the marl series are deposited on the spoil heaps to heights reaching up to 200.m. The work described here aims to decrease the environmental impacts of these colliery wastes by evaluating their potential use as raw materials for the brick industry. Samples obtained from newly excavated colliery sites, as well as spoil heaps that have been deposited for two years, were ground to 44 and 1000. ?m grain size, shaped into bricks at three different pre-compression pressures (80, 100 and 130.kg/cm2) and then cured at four different temperatures (900, 950, 1000 and 1050°C). The results of standard brick tests applied to the marl samples show that the best building bricks are manufactured when 1000?m grain size samples are sintered at 1000°C and at a pre-compression pressure of 130.kg/cm2 with a sintering rate of 2.5°C/min. Owing to weathering conditions, some of the carbonated minerals were washed away from the original structure. The unit volume weight of the bricks made from old marl is approximately 30% lighter than those manufactured from newly excavated samples. The colour of the brick made of washed marl is almost roof tile colour, while the colour of the brick manufactured from newly excavated marl is pale yellow.Öğe Examination of calorific losses occurring in coal stockpiles- A case study(2006) Ozdeniz H.; Sensogut C.Excess amount of coals produced more than demand has to be deposited in stockyards. During this period, coals lose both their economical values and cause environmental problems. It is often that spontaneous combustion event of coals can take place in the cases of convenient conditions are available. In this work, two industrial sized stockpiles were constituted at coal stockyard of Western Lignite Corporation (WLC) in Tuncbilek, Turkey. The size of the stockpiles formed as triangle prism was about 10 m by 5 m width with a height of 3m; each mass being approximately 120 tons of coal in total. Some of the parameters that are effective on the stockpiles were measured in a continuous manner during this experimental work. These parameters were weather temperature, atmospheric pressure, humidity of air, velocity and direction of wind. The calorific losses and the decreases occurred in particle sizes due to atmospheric conditions were also examined and detailed as the result of this work. © 2006. International Scientific Conference SGEM.Öğe An experimental work on the crushing and grinding features of rocks related to their textural properties(2006) Kekec B.; Unal M.; Sensogut C.[Abstract not Available]
