Approaches to High-grade Sintered Magnesia from Natural Magnesite

• 作者: BI Deli GUO Zongqi MA Ying SUN Zhenlin
• 来源期刊: 中国耐火材料（英文版）
• 年，卷（期）: 2020,（3）
• 页码范围: 7-12
• 页数: 6页
• 语种: 英文
• DOI: 10.19691/j.cnki.1004-4493.2020.03.002

摘要

It is hard to manufacture high purity,dense sintered-magnesia from natural magnesite in the prevailing process of calcining and sintering,for two reasons: a) impurity,and b) low sintering activity of coarse-grained magnesite.In this paper,95％ MgO magnesite was used as the starting material and finally magnesia of high density (3.47 g · cm-3) and high purity (98％ MgO) was obtained after the flotation purification and a three-step sintering process.An industrial scale of the beneficiation system of natural magnesite was introduced for magnesite purification.In lab experimental,the three-step sintering process was implemented by calcining,hydrating,re-calcining and sintering,which has proven the possibility of densified magnesia from natural magnesite.