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Evaluation of Cost Effectiveness of Onibode Fire-Clay for Production of High Quality Refractory Bricks

Journal of Minerals and Materials Characterization and Engineering 2015年第5期3卷 399-408页

作者： David Ehigie Esezobor friday ichifu apeh Mfon Okon Udo Mustapha Fabiyi Enebi Solomon apeh Department of Metallurgical and Materials Engineering University of Lagos Lagos Nigeria Engineering Materials Research Department Nigeria Building and Road Research Institute Ota Nigeria Department of Marine Engineering Federal Collage of Fisheries and Marine Technology Lagos Nigeria

In establishing a plant or factory, the cost-benefit analysis is needed to determine the viability for such financial investment on the project. In this paper, the cost establishing a factory of 200,000 bricks per annum capacity, for the production of high quality refractory bricks from locally available raw materials in Nigeria was evaluated. The evaluation was conducted on the virgin refractory material (100%) as well as with varied percentages (10% - 40%) of alumina additions. The result of cost benefit analysis indicated that, the project was viable, with the highest cost at N1,203.66 per brick as against N1,800 (at 3 years projections) of the imported brick. The payback period for the capital investment was very short (within two years). The findings will aid investors in decision makings.

关键词： Cost-Benefit-Analysis High-Temperature Refractory Bricks Steel Plants

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Impact of Moisture Variation on Some Foundry Properties of Fori Silica Sand

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Journal of Minerals and Materials Characterization and Engineering 2022年第5期10卷 429-437页

作者： friday ichifu apeh Lawan Umar Mahmoud Sa’idu Shuaibu Mustapha Olawale Fabiyi Engineering Material Research Department Nigerian Building and Road Research Institute Abuja Nigeria Department of Automobile Engineering Abubakar Tafawa Balewa University Bauchi Nigeria

Moulding Sand for metal casting is usually sourced from either natural deposit or synthetic mix of refractory sand grain binder and moisture. Each of the mix constituent is important in determining the characteristics of sand. The binding agent is responsible for bendability thereby determining the size of voids within the sand grain, while moisture level determines the plasticity of the foundry sand. Tests using American Foundry Society (AFS) Standard were followed in carrying out the experiment on Fori sand deposit to determine its suitability for foundry use. The sand was collected from the river bank of Fori, in Fori Community, Maiduguri, Borno State. The experimental test equipment includes: laboratory sand mixer, sand rammer, universal strength testing machine, permeability-meter, oven, mouldability machine, and as well as quick moisture teller. The chemical composition of the materials was carried out using atomic absorption spectrophotometer (AAS) model PG990AFG. The silica content in the material sample is about 78.65%, and with the traces of other elements, such as CaO (1.07%), Fe2O3 (0.76%), Al2O3 (15.81%), MgO (1.01%), TiO2 (2.21%), K2O (3.87%), and Na2O (1.16%), respectively. These percentages are within acceptable limits. The results of the physical properties revealed that the sand sample has clay content of 15.32% which is above the standard range of 10% - 12% recommended for natural moulding sands required for producing good quality castings. Other foundry properties of Forinatural moulding sand conducted include “moisture content” in the following ranges of percentages, 7.6%, 6.5%, 5.8%, 4.2% and 2.9% with the corresponding value of green compressive strength of (43.95, 53.47, 69.56, 68.21 and 61.16 KN/m2), dry compressive strength (93.50, 96.52, 105.50, 146.50 and 152.49 KN/m2), and permeability No. of 340, 390, 410, 430 and 440 respectively. It is c

关键词： Fori Moulding Sand Mouldability Moisture Content Refractoriness Compressive Strength

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