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

作　　者：Friday Ichifu Apeh Lawan Umar Mahmoud Sa’idu Shuaibu Mustapha Olawale Fabiyi 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)

机构地区：[1]Engineering Material Research Department, Nigerian Building and Road Research Institute, Abuja, Nigeria [2]Department of Automobile Engineering, Abubakar Tafawa Balewa University, Bauchi, Nigeria

出　　处：《Journal of Minerals and Materials Characterization and Engineering》2022年第5期429-437,共9页矿物质和材料特性和工程（英文）

摘　　要：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 clear from the test that, the lower the moistMoulding 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 clear from the test that, the lower the moist

关 键 词：Fori Moulding Sand MOULDABILITY Moisture Content REFRACTORINESS Compressive Strength 

分 类 号：TG2[金属学及工艺—铸造]