对白云鄂博含铌铁矿粉氢气选择性还原-熔分-铌铁冶炼的提铌方案中磷的行为进行试验研究。在该试验条件下，磷质量分数为0.100%的含铌铁矿粉通氢气还原后熔分，得到磷质量分数小于0.010%、铌质量分数为2.000%的富铌渣，铁中铌质量分数为0.008%、磷质量分数为0.230%，铌磷分离效果明显，同时熔分后铌品位是原来的3.5倍。试验结果表明，氢气在还原阶段能够在还原铁氧化物的同时将Ca3P2O8还原，通过熔分达到铌与磷、铁元素等分离的目的，铌有效地富集在渣中。
The phosphorus behavior of Nb-bearing iron ore powder in Bayan Obo was studied through the experiment of hydrogen selective reduction-melting-separation-Nb-bearing iron smelting. Under the experimental conditions,niobi-um-bearing iron ore powder containing 0.100%phosphorus was reduced by hydrogen and then melted,the niobium en-riched slag which contained 2.00% niobium was yielded and contained phosphorus less than 0.010%. Meanwhile the iron contained niobium of 0.008%and phosphorus of 0.230%. And niobium concentration in the niobium enriched slag was 3.5 times in the niobium-bearing iron ore powder. The experimental results indicated that Ca3P2O8 can also be re-duced by hydrogen when iron oxides were reduced by hydrogen. So the aim that phosphorus and iron elements were sep-arated from the niobium enriched slag had been achieved.
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