作者：ZHANG Tao,WEI Yaowu,LI Nan,LI Bingrong,WANG Jinhu

作者单位：The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology

刊名：China’s Refractories

ISSN：1004-4493

出版年：2020-09-15

卷：29

期：3

起页：32-37

止页：

分类号：TQ175.1

语种：英文

关键词：

内容简介

The application of Ca O refractories was limited due to their poor hydration resistance. Introducing appropriate additive is an effective way to improve their hydration resistance. Additive WO3 was introduced in the preparation of Ca O aggregates using a calcination method in this study. The introduction of WO3 decreased the apparent porosity of Ca O aggregates and promoted the grain growth of Ca O by the formation of liquid at high temperatures. The average grain size of the specimens with 0.4 mass% WO3 and treated at 1 550 °C was increased to 51.6 μm comparing to 33.5 μm of those without WO3 additive. As a result, the hydration resistance of Ca O aggregates was significantly improved. Besides, WO3 sublimated easily, therefore, less WO3 remained after the heat treatment. The further increase of WO3 addition had little effect on the hydration resistance of Ca O specimens.