论文部分内容阅读
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。
According to the characteristics of mineral composition of high-phosphate iron ore, the reaction between the fluorite apatite and the gangue phase in high-phosphate iron ore was studied, and the mechanism of carbothermal reduction of phosphorus-bearing minerals in the high-phosphate iron ore was clarified. The study found that: in the case of unadulterated graphite, fluorapatite and gangue are independent of each other, did not react; with the addition of graphite, the fluoride apatite different degrees of reduction, gangue SiO 2 off Phosphorus capacity of the strongest. When both SiO_2, Al_2O_3 and Fe_2O_3 were added to fluorapatite, the rate of carbothermal reduction of fluoroapatite accelerated, and CaAl_2Si_2O_8 formed in the gangue phase.