From open cast mines at obwetti in enugu, south east nigeriaopened up activities in the coal industry. subsequent prospecting was conducted and twenty-two coal mine sites/deposits were discovered with varying reserves. lafia/obi coal is one of them with proven reserve of 21.42 million tonnes . lafia/obi coal is.
Mining of lafia obi coal a purification technique of coal mine acid rock drainage in groundwater 1assistant directorstate coordinator nasarawa state field office, national environmental standards , lafia exploration and mining activities in nigeria as extensively studied by akwa, et,al 2007 coal briquetting enterprise obi terrazotiles making and mining.
The present global concern for new sources of energy has kindled a renewed interest in coal. in the option for maximizing the use of low grade coals in the production of metallurgical grade coke and various coal conversion processes, the qualities of three nigerian coal samples, onyeama, garin maiganga and lafia-obi, were assessed for their potential utilization in a blast furnace.
3.7 billion coal-to-power projectscripted to provide an initial 1,200 mw power plant to be built at enugu, using coal from the ezimo mine adetayo, 2013. 7 with vast supplies of coal and against the backdrop of severe shortages in much needed supply of electricity, it is inevitable that nigeria must move from rhetoric to concrete action.Coal mines in nigeria, namely onyeama, ogwashi, ezimo, inyi, amasiodo, okaba, lafia-obi, owukpa owukpa, ogboyoga and okpara. the estimated reserves of these coal mines are 2.1gt, i.e.. about 84 of the total estimated reserves of the 2.5 gt of coal. the coal mines are open cast surface miningmining.
Mineable coal deposits in nigeria occur at enugu, okaba, ogboyaga, orukpa, obi-lafia, gombe and chikila obaje, 2009. there is a reported occurrence of coal seams in ezimo, enugu state; iyoko river, east of ukana and egodo river near okpatu both in benue state. there is a main coal seam in inyi area, enugu state. inyi coal deposit is.Coking coals, found in the lafia–obi coal field, are high in sulfur and have to be learn more. ministry of mines and steel development 1 - mine ,coal – estimated reserves of over 2.7 billion tonnes. 2. a nigerian minerals and mining act, 2007 and its . obi -‐lafia coal obi, obi lga,. nasarawa state. mining.
Mar 02, 2016 coal exploration in nigeria started as far back as 1916. available data show that coal mainly sub-bituminous steam coals except for the lafia-obi bituminous coking coal occurrences in nigeria have been indicated in more than 22 coalfields spread over 13 states of the federation.
Within the known coal areas at enugu, ezinmo, owukpa, okabba , and oggboyega and later in the seventies at lafia-obi. udi mine, located at the foot of a range of enugu hills, was the scene of the first ever nigerian mining activity in 1906. thereafter oghete, iveallal and asaba in that order were worked and exhausted between 1917 and 1967.
The deposit occurs within the giza anticline and partly within the obi syncline. exploration. a geological and geophysical survey carried out 1:10,000. 138 core holes were drilled ranging from 80m and 520m depth. 2 shafts were sunk to depths of 28m and 32m. over 36,000m of drill core were sampled and studied. 36 coal seams were identified.Apr 01, 2018 an analysis of clean coal technologies for the recovery of energy from nigerian coals was carried out. the coal mines studied are onyeama, ogwashi, ezimo, inyi, amasiodo, okaba, lafia-obi, owukpa owukpa, ogboyoga and okpara. the estimated reserves of the ten coal deposit amount to 2.1 gt, which is about 84 of the total coal reserves of the mining.
Ultimate analysis and the calorific value of lafia-obi coal. the results obtained for the moisture content, ash content, volatile matter, and fixed carbon were close to the value previously gotten by [1, 4 and 8]. approximately, lafia-obi coal has 2.16 moisture, 27.96 mining.
Coal basin, and occupy an area of approx. 145,600 hectares. these resource estimates exclude coal that is less than 1.5m thick. these resources appear to be amenable to underground mining utilising long wall and surface contour mining along the outcrop. 274,000 ha of the deposit is unexplored to the north, south, and down dip to the west from mining.
Coal mining and the environmental impact of . steel company in nigeria 2, 3 . now, with the global obi coal mines in kogi, enugu and nasarawa states, mining.Mar 10, 2014 s. j. mallo, the menace of acid mine drainage: an impending challenge in the mining of lafia-obi coal, nigeria. continental journal of engineering sciences, vol. 6, 2011, pp. 46 – 54.  h. ezeigbo and b. n. ezeanyim, environmental pollution from coal mining activities in enugu area, nigeria. international journal of mine water and the mining.Profile for lafia-obi coal, indicating that the coal has a good coking potential. a good . vol.7, no.4 assessment of some nigerian coals 305 metallurgical coal usually possesses a gray-king profile between g1 to g9. doho and lamja coals have gray-king type a and b profiles respectively which suggest that they are of poor mining.
Multistage caustic leaching de-ashing of nigerian lafia-obi coal249 кб. the ash content of the concentrates blend at 19.90 is lower than 23.80 required for coal blends for indian standard coking practice, but higher than the2.
Feb 01, 1996 depositional environments of the then coal facies in the obi/lafia area based on maceral ass oions and petrographic indices modified from maxrhioni and kallqputh, l kalth et al., l. fig. 6. comments and interpretation of the diagram are given in the next section. petrographic facies of the obi/lafia area the vitrinite jusinite coal facies.Abstract: some nigerian cretaceous coal deposits have been mapped and characterized for their petroleum source rock potential based on rock eval pyrolysis. these coal deposits which occur entirely within the anambra basin/benue trough have been mapped at owukpa, okaba, ogboyaga, omelehu, lafia-obi and at gombe-kumo.
May 12, 2016 medium and low temperature carbonization of onyeama and lafia-obi coal samples gave an improved and satisfactory percentage stability and friability for semicokes. mining investment and mining opportunities, ministry of solid minerals development, abuja, nigeria, 2008, mining.
Coal samples. the volatile matter of lafia-obi coal is close to that of the foreign coals; while a large difference exists between chikila coal and the foreign ones. it was observed elsewhere that the lafia-obi coal is higher in maturity than the chikila coal  and volatile matter is known to decrease with increase in rank [18,19].
The technology of fluidized bed coal combustion fbc and its advantages over conventional coal burning systems is now well established and is extensively reported in the literature. there is also some emphasis in literature about the suitability of lafia-obi coal in fbc. however, there is little quantitative or qualitative information on theperformance of lafia-obi in fbc.
Energy council 8 puts nigeria’s total proven coal reserves at 344 million tons, most of which fall within the rank of bitumi-nous or sub-bituminous. of the total nigerian coal deposits, the lafia-obi basin has an estimated 21 million tons of bituminous coal reserves.9 this makes it an attractive economically viable.
Dec 24, 2019 two companies, tongyi global solid minerals resources limited and sansani farms limited, got license to extract coal in nasarawa state. while the former has a permit for coal, lead and zinc in obi and lafia, the later has a small-scale mining sm licence for coal in lafia.Coal mining in enugu is mainly by surface mining and underground mining systems. duffryn 1977. in the surface mining system, mining layers of rocks or soil overlying a coal mining nasarawa lafia – obi coking coal 22 unknown 22 other states other location 1160 1160.Feb 26, 2018 on these bases, okaba coal deposits within the anambra basin in nigeria are most suitable for smokeless coal fuel production and electricity generation to enhance energy availability. on the other hand, the ogboyaga and lafia-obi coals combust poorly and will emit considerable pollutants when considered as an energy source.Subsequent prospecting was conducted and twenty-two coal mine sites/deposits were discovered with varying reserves. lafia/obi coal is one of them with proven reserve of 21.42 million tonnes . lafia/obi coal is bituminous and this grade of coal is important as mining.
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