高磷铁矿含磷矿物与脉石相碳热还原机理  

Carbothermal reduction mechanism of fluorapatite and gangue in high phosphorus iron ore

作　　者：成成[1] 薛庆国[1] 王静松[1] 王广[1] 张媛媛[1] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《钢铁研究学报》2016年第4期8-15,共8页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51134008)

摘　　要：针对高磷铁矿矿物组成特点,对氟磷灰石与高磷铁矿中脉石相的反应进行了研究,阐明了高磷铁矿在直接还原过程中含磷矿物的碳热还原机理。研究发现:在不配加石墨的情况下,氟磷灰石与脉石之间相互独立,没有发生反应;在配加石墨的情况下,氟磷灰石发生不同程度的还原,脉石中SiO_2脱磷能力最强。当SiO_2、Al_2O_3和Fe_2O_3同时加入氟磷灰石后,氟磷灰石碳热还原速率加快,并且在脉石相中形成了CaAl_2Si_2O_8。Based on the mineral composition characteristics of high phosphorus iron ore,the reaction of fluorapatite and gangue in high phosphorus iron ore was studied and the carbothermal reduction mechanism of high phosphorus iron ore during direct reduction was clarified.The results show that fluorapatite and gangue phase are independent without graphite;while fluorapatite is reduced in varying degrees with graphite and SiO2 have the strongest capability on dephosphorization.The reaction rate of fluorapatite with carbon was enhanced and CaAl2Si2O8 was formed in gangue phase when SiO2,Al2O3 and Fe2O3 were added at the same time.

关 键 词：高磷铁矿 氟磷灰石 碳热还原 反应机理 

分 类 号：TF511[冶金工程—钢铁冶金]