Dephosphorization mechanism in a roasting process for direct reduction of high-phosphorus oolitic hematite in west Hubei Province,China
-
摘要: 采用XRD和SEM分析方法研究了鄂西高磷鮞狀赤鐵礦添加脫磷劑后直接還原焙燒的產物及磁選后的最終產品.結果表明,還原焙燒過程中添加的脫磷劑除具有脫磷效果外,對鐵的還原也有促進作用.脫磷劑可以使部分磷轉化為易去除的可溶性磷酸鹽,同時破壞鮞粒結構,使細磨-磁選后鐵相易與脈石礦物分離從而達到脫磷效果,并且可以提高產品中鐵的品位和回收率.Abstract: Direct reduction-roasted products and final products after magnetic separation, which are reduced from high-phosphorus oolitic hematite in west Hubei Province of China by adding a dephosphorization agent, were investigated by XRD and SEM. The results show that the dephosphorization agent added in the reduction-roasting process can remove phosphorus and promote iron reduction. The dephosphorization agent not only transforms partial phosphorus ores into easy removed solvable phosphate but also breaks the oolitic structure, leading to an easy separation of iron from gangue after fine grinding and magnetic separation in order to remove phosphorus. The grade and recovery of iron also improve due to adding the dephosphorization agent.
-
Key words:
- hematite /
- direct reduction /
- roasting /
- dephosphorization
-

計量
- 文章訪問數: 127
- HTML全文瀏覽量: 27
- PDF下載量: 7
- 被引次數: 0