高磷铁矿含磷矿物与脉石相碳热还原机理

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 SiO2脱磷能力最强.当 SiO2、Al2 O3和 Fe2 O3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 CaAl2 Si2 O8.

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

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 capa-bility on dephosphorization.The reaction rate of fluorapatite with carbon was enhanced and CaAl2 Si2 O8 was formed in gangue phase when SiO2 ,Al2 O3 and Fe2 O3 were added at the same time.