University of Khartoum

Occurrence Origin and Industrial Potentiality of central and Northern Sudan Kaolin Deposits

Occurrence Origin and Industrial Potentiality of central and Northern Sudan Kaolin Deposits

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Title: Occurrence Origin and Industrial Potentiality of central and Northern Sudan Kaolin Deposits
Author: Mohamed Babiker, Mohamed
Abstract: Kaolinite clays, or kaolins as commercially known, are considered as one of the most valuable industrial material when they are in their refined white state. They are found in nature as primary residual deposits or secondary sedimentary deposits laid down in floodplains. In Sudan kaolin deposits are known to exist in commercial quantities in many localities in east, west, center and north areas of the country. They are found in the form of lenses or thick bodies embedded in the Nubian Sandstone Formation of Cretaceous age The physical and chemical properties determined for five selected kaolin deposits in north and center of the country proved their suitability to many industries when they were purified and the –53 micron portion was separated. They can be used as fillers in paper, paint, plastic and rubber industries while they are suitable as raw material for ceramics and refractories. Three methods of processing are found suitable for refining the local kaolin. The first process is sedimentation by gravity to get rid of the sand size impurities. The second is the flotation process by which the iron and titanium oxides, which concentrate in the finer portion, can be decreased to the minimum. The third process is the use of high magnetic separation to lower the iron content even further. It is known that these oxides have a great negative effect on the desired white colour of the kaolin. The world production of kaolin reached by now 40 million mt/year with about 4,8 billion dollars turn-over and it is increasing yearly at a rate of 4%. A small scale refined kaolin project at a cost of $ 2,650,000 and producing 25,000 TPY is suggested which will cover the local consumption and the extra product can easily be exported to the nearby Arab countries which are now importing their needs from countries like Australia, India and Brazil. The financial analysis of the project seems quite encouraging and the return on investment could be as high as 33% and the expected pay-back period will not exceed three years if the income taxes are exempted during the first years of the project
Description: 202page
URI: http://khartoumspace.uofk.edu/handle/123456789/11349
Date: 2015-05-25


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