中南大学学报（自然科学版）2012，Vol.43Issue(3)：827-834,8.
高磷鲕状赤铁矿直接还原同步脱磷新脱磷剂
New dephosphorizing agent for phosphorus removal from high-phosphorus oolitic hematite ore in direct reduction roasting
摘要
Abstract
In order to exploit high-phosphorus oolitic hematite, Phosphorus removal in direct reduction roasting of the Ningxiang type high phosphorus oolitic hematite with iron content about 43.58%, phosphorus content about 0.83% was studied. XRD and SEM were used to analyze the mechanism of direct reduction roasting and phosphorus removal. The results show that the direct reduction iron powder with an iron grade 91.35%, 85.12% in recovery, phosphorus content about 0.081% is obtained under the condition that dephosphorizing agent NCP and new dephosphorizing agent TS is used together. It is found that phosphate phase has not changed, still existing in the form of apatite after direct reduction rosting, and phosphorus removal is achieved by finely ground and magnetic separation. The addition of dephosphorizing agent can make boundary of the gangue particles and metallic iron particles become smooth and clear, which is good to the dissociation of metallic iron particles and gangue, while dephosphorizing agent can also promote the reduction of fayalite.关键词
高磷鲕状赤铁矿/直接还原焙烧/脱磷剂/磁选/脱磷率Key words
high phosphorus oolitic hematite/ direct reduction roasting/ dephosphorizing agent/ magnetic separation/ dephosphorization rate分类
矿业与冶金引用本文复制引用
李永利,孙体昌,徐承焱,刘占华..高磷鲕状赤铁矿直接还原同步脱磷新脱磷剂[J].中南大学学报（自然科学版）,2012,43(3):827-834,8.基金项目
国家自然科学基金资助项目(51074016) （51074016）
