Publication Date : 01/08/2016

Author(s) :

Mahdi Makoyo, Balarabe A. Saidu.

Volume/Issue :
Volume 11
Issue 2
(08 - 2016)

Abstract :

The foundry properties of Bachirawa sand deposit located in Dawakin Tofa Local Government Area of Kano State was investigated. The sourcing of good foundry sand is one of the problems in foundry operations, in most cases foundry sand had to be transported from locations with good quality sand towhere the foundry plants are located.This problem had forced many foundry operators to locate their foundry closer to the source of this very important raw material. Sand samples were collected from the deposit and test specimens were prepared for investigation of foundry properties such as strength, permeability, compactibility, flowability, plasticity, bulk density, collapsibility, refractoriness, grain size etc. The results of the investigation revealed that Bachirawa sand possess the following properties: grain fineness number of 111.76, green compression strength of 90.35kN/m2, green shear strength of 19.3kN/m2, dry compression strength of 4726.5kN/m2, dry shear strength of 531.3kN/m2, permeability of 220Ws, flowability of 98.4%, bulk density of 1.81g/cm3, shattered index of 82.9%, clay content of 12.48%, compactibility of 50.9% and refractoriness between1400oC to 1450oC. The result also revealed that the sand is high silica sand with 80.75% silica, 4.17% alumina, 2.54% iron, 0.11%calcium oxide and 0.03% magnesia. The sand can be considered to be fine sand based on its grain fineness number which is above 100 in ranking of American Foundry Society. Based on the values of the strengths obtained, the sand can be considered good for sand moulding such as sand casting of non-ferrous metal such as aluminum products and cast iron machine components.

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