Environmental Issues of the Ajaokuta Steel Complex in Nigeria
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 6
Abstract
The aim of this article is to analyse the various industrial processes in the Ajaokuta and the waste products each produces, with the view to highlighting some conservation measures that will enhance the environmental management plan of the Ajaokuta steel complex. A background information was provided on the general production system of steel, was provided, before a detailed description of major plants in the complex that produce environmental wastes, these included Sintering Plant, Cake Oven, Blast Furnance, Iron and steel making plants, Rolling Mills and the Thermal Power Plant.Pollution inventory of these were made and its highlights revealed that the Cake oven and Sinter plants are highly polluting, while the Electric Arc Furnanace (EAF) and Electric Induction Furnanace ( EIF) plants that use scrap and DRI are relatively less polluting due to lower scales of operation and the nature of the feedstock being used in the Ajaokuta complex.Generally the air pollutants most visible are those of particulate matter, oxides of sulphur and nitrogen. Some corrective measures were proposed including the introduction of emission control technologies like scrubbers, bag filters and electro static precipitators. Water quantity and quality measures were also recommended in order to reduce water use from the existing 15m3 /tcs to less than 5m3 /tcs. Similarly the existing volume of solid waste being generated by the processes inventoried at 600 to 800kg per ton of steel and adequate measures were recommended in order to reduce it to the global average of 400 to 500 kg per ton of steel.
Authors and Affiliations
Mohammed A. Al-Amin
Keywords
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