Lightweight micro-closed-pore corundum composite refractory, method for preparing the same

US10519065B2 · kind B2 · utility

Assignee

• WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY · CN

Inventors

• Huazhi Gu · 红钢城街道, CN
• Ao Huang · 红钢城街道, CN
• Lvping Fu · 红钢城街道, CN
• Meijie Zhang · 安丰镇, CN
• Nan Li · Chongqing, CN

Key dates

• Filing date: Dec 16, 2015
• Grant date: Dec 31, 2019
• Expiry date: Dec 16, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/9669
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A lightweight micro-closed-pore corundum composite refractory and a method preparing the same, wherein raw materials of the refractory comprise 95-99 parts by weight of α-Al2O3 micro-powder and 1-5 parts by weight of dolomite clinker; and additives of the refractory comprise 2-15 parts by weight of nano alumina sol, 5-15 parts by weight of a carbohydrate polymer, and 30-50 parts by weight of an organic alcohol. and the lightweight micro-closed-pore corundum composite refractory is prepared by: mixing and wet grinding the raw materials and the additives to obtain a slurry; placing the slurry in a mold, keeping the mold at 15-25° C. for 6-12 hours and then keeping the mold at 60-90° C. for 6-12 hours, then demolding; drying a demolded green body at 110-200° C. for 24-36 hours, and keeping the green body at 1800-2000° C. for 2-5 hours. A method preparing a lightweight micro-closed-pore corundum composite refractory is also provided. The lightweight micro-closed-pore corundum composite refractory of the present invention has characteristics of low bulk density, small average pore size, high closed porosity, low thermal conductivity, strong thermal shock resistance, abrasion resistance …