作者：E.O. Onche;B. I. Ugheoke;G. A. Asikpo;

作者单位：Department of Mechanical Engineering, Federal University of Technology, P. M. B. 2076, Yola-Nigeria

刊名：China's Refractories

ISSN：1004-4493

出版年：2006-01-05

卷：15

期：3

起页：17

止页：23

分类号：TQ175

语种：英文

关键词：Refractories;Insulating brick;Kaolin;Rice husk;

内容简介

In this work, the suitability of using Kaolin-Rice husk-plastic clay to produce insulating firebrick was experimentally investigated and the optimal ratio of these constituents determined. Ten brick samples of different compositions were fired at 1200 deg C. Three of the samples (samples 6, 7, and 8 ) crumbled during firing. The surviving samples gave the following limits of results; shrinkage; 9.7 percent-13.6 percent; effective moisture content percent 28.34 percent-32.52 percent; modulus of rapture: 4.26kgf/cm~2-19.10kgf/cm~2; apparent porosity: 56 percent-95.93 percent; water absorption: 42.27 percent-92.12 percent; bulk density: 1.04g/cm~3 - 1.41g/cm~3; apparent density: 2.56g/cm~3 -5.77g/cm~3; and thermal conductivity'. 0.005W/mK 0.134W/mK. The results showed that they all had good insulating characteristics. Samples 1-5 and 10 showed good level of refractoriness, while mixing ratio of 4:1:2 {representing weight in grams of Kaolin, plastic clay and rice husk respectively} for sample 4 gave the optimum performance values in terms of refractoriness, thermal conductivity, modulus of rupture, shrinkage and bulk density and the effective moisture content.