Background

mining of lafia obi coal

Geology, geochemistry and biomarker evaluation of Lafia ...

However, there are few published papers on the Lafia-Obi coal. Obaje and Obaje et al. described the petrographic and depositional environments of the coal bearing strata of the Awgu Formation, and also subdivided the coal beds and interseam sediments into three different coal facies, namely: (a) vitrinite–fusinite, (b) trimaceritic and (c) shaly coal facies, respectively.

About Nasarawa State – Official Website of Nasarawa State

The Lafia-Obi coal which is of high-medium volatile bituminous rank with estimated reserves of 128.3million tonnes could be used to establish small sized modular coal-fired Independent Power Plants (IPPs) for the generation of electricity in the state.

10.1016/S0016-2361(01)00122-3 | DeepDyve

The Lafia-Obi coal is found within the Awgu Formation of the Turonian–Santonian depositional cycle ( Fig. 2 ), and has a proven coal reserve of over 22 million tons [3] . The coal deposit occurs as numerous seams in a belt, which runs through Obi-Hobol and Akulungu-Akpum. However, there are few published papers on the Lafia-Obi coal.

WASHABILITY AND FROTH FLOTATION TESTS OF LAFIA …

Lafia-Obi coal, the only local coal with good coking properties is however laden with excessive ash and sulphur contents of about 26.3% and 2.3% respectively (Taskforce, 1987). The Lafia-Obi coal deposit has been found to be geologically faulty and the minimum estimated cost of mining it per ton was at N87.50 as at 1977 (Taskforce, 1987).

Gasification of Lafia-Obi Coal Using ANSYS Fluent As …

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 [3]. Lafia/Obi coal is bituminous and this grade of coal is important as fuel because it burns slowly, provides a lot of heat and is

(PDF) The Economic Cost of Dewatering of the "Hajvalia" …

Development and Mining of the Lafia-Obi coal, Nige ria. s.l., Wilolud Journals. Mallo SJ, 2011 ) Mine Dewatering:A veritab le component in mine cost analy sis in the development

Geology, geochemistry and biomarker evaluation of Lafia ...

Geology, geochemistry and biomarker evaluation of Lafia-Obi coal, Benue Trough, Nigeria. OLUGBENGA A EHINOLA. D. Oros. C. Ekweozor. OLUGBENGA A EHINOLA. D. Oros. C. Ekweozor. Related Papers. Aspects of organic geochemistry of Nigerian coal as a potential source-rock of petroleum. By Taofik Adedosu.

Current Approaches for Mitigating Acid Mine Drainage ...

Mallo SJ (2011) The menace of acid mine drainage: an impending challenge in the mining of Lafia-obi coal, Nigeria. Continental J Eng Sci 6:46–54 Google Scholar Martin J, Fyfe J (2011) Innovative closure concepts for xstrata nickel onaping operations, presentation in Sudbury 2011, mining and the environment international conference V, 25–30 ...

A REVIEW OF TECHNICAL POTENTIAL FOR COAL …

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.

Obi Lafia Coal Block • I-MINE

Coal bearing beds (seams) within the Lower and Upper Coal Measures of the Agwu Formation. 20 Coal seams occur within the Lower Coal Measure while 16 are in the Upper Coal Measure. The deposit occurs within the Giza anticline and partly within the Obi syncline. Exploration. A geological and geophysical survey carried out (1:10,000).

ENERGY OUTPUT ASSESSMENT OF LAFIA-OBI COAL IN A …

ENERGY OUTPUT ASSESSMENT OF LAFIA-OBI COAL IN A FLUIDIZED BED COMBUSTOR E. O Ilyas, et al Nigerian Journal of Technology Vol. 37, No. 4, October, 2018 968 Figure 1: Electricity demand projection in Nigeria (Sambo, 2008) Therefore, its value must be monitored and maintained

Emission and Combustion Characteristics of Lafia-Obi Coal ...

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.

Quality of Some Nigerian Coals as Blending Stock in ...

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 [17] and volatile matter is known to decrease with increase in rank [18,19].

Assessment of Some Nigerian Coals for Metallurgical ...

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 ...

Stratigraphic palynology of Obi (Lafia), Plateau State of ...

GEOGRAPHIC LOCATION The Obi--Lafia area is situated between 8and 830'N latitude and 830' and 930'E longitude, of Plateau State, Nigeria (Fig.l). Adjoining the Obi area, are Agwantashi, Agaza, Kanje and Awe. These areas are also being explored for coking coal. STRATIGRAPHY As Obi (Lafia) is essentially part of the Middle Benue Valley, the ...

(PDF) Quality of Some Nigerian Coals as Blending Stock in ...

Based on the maceral composition, three types of coal facies have been identified in the Obi/Lafia area: 1 .A vitrinite-dominated coal facies, in which vitrinite …

Selective oil agglomeration of Lafia coal, Nigeria ...

Because mineral matter is finely distributed within the matrix, Nigerian Lafia coal is nonresponsive to conventional processing techniques. However, testing has shown that Lafia coal can he upgraded by selective oil agglomeration. The optimum oil concentration was found to be 10 mL of paraffin per 25 g of coal. A product containing 6% ash and 1.9% sulfur was obtained …

Physical and Plastic Properties of Three Nigerian Coals

Lafia-Obi coal has the lowest volatile matter of 22.25%, followed by Onyeama Sample with values of 34.97% and Garin Maiganga (Gombe) with 37.05% while percentage volatile matter for semi-cokes are 3.71% for Onyeama, 2.42% for …

Physical and Plastic Properties of Three Nigerian Coals

Results obtained revealed that the moisture content of Onyeama, Lafia-Obi and Garin Maiganga coal are 3.03, 2.93 and 6.35%, respectively with corresponding ash content of the semi-coke as 25.10, 28.54 and 42.01% in that order. x-ray fluorescence revealed high mineral matter content with highest concentration of copper and lead (10400 and 32500 ...

Computational fluid dynamics simulation of Lafia–Obi ...

The coal was taken from the Lafia–Obi site in the MBT of Nigeria; the coal particle sizes varied from 10 mm to 25 mm. The schematic description of the fluidized-bed combustion is given in Fig. 1 . In order to enhance the combustion the air inflow is divided by two lines.

10.1016/j.fuel.2014.09.076 | 10.1016/j.fuel ... - DeepDyve

1 Introduction Today, coal is utilized in large tonnages for the generation of electricity in power plants. Latest estimates indicate that 41% of electric power generation depends on coal [1] . With continued global climate change concerns, efforts continue worldwide to achieve cleaner and more efficient coal combustion for energy production.

Obi HPAL Nickel-Cobalt Project, North Maluku Province ...

The Obi HPAL nickel-cobalt project is located in the Kawasi village mining area in the Obi district, in the Maluku province of Indonesia. The project site lies on the Obi Islands in the South Halmahera regency. Obi HPAL nickel-cobalt project development plan The HPAL nickel-cobalt processing and refining facility is being developed in two phases.

(PDF) Determination of selected metals in coal samples ...

Based on the maceral composition, three types of coal facies have been identified in the Obi/Lafia area: 1 .A vitrinite-dominated coal facies, in which vitrinite makes up, on average, 67.3 % ...

Data evaluation of trace elements determined in Nigerian ...

High segregation of coal fly ash was observed, while metallurgical coal grouped together with high-ranking coals of Okaba, Enugu and Obi (Lafia). Further work revealed some of these coals as having high gross calorific value (7908 kcal kg(-1) for Enugu coal; 7200 kcal kg(-1) for Okaba) and low sulphur thereby making them efficient fuel materials.

Petrology, physicochemical and thermal analyses of ...

The highest VM was observed in the Lafia-Obi coal, followed by Garin-Maiganga coal, and lowest VM of the Enugu coal. The VM of the analyzed coal samples (Except for the Enugu and Imiegba coals) is considerably higher than other Nigerian coals, such as Onyeama (35 wt%), Ogwashi (27.8 wt%), Ezimo (32 wt%), Inyi (30 wt%), and Ogboyoga (30.4 wt ...

NIGERIAN CRETACEOUS COAL DEPOSITS AND THEIR …

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.