Study on Niobium and Phosphorus Behaviors during the Melt Separation Process of Prerestored Niobium Ore Concentrate

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• 英文论文题名：Study on Niobium and Phosphorus Behaviors during the Melt Separation Process of Prerestored Niobium Ore Concentrate
• 论文作者：Yu-bao LIU ; Zhi-hong ZHANG ; Er-xiong ZHAO ; Xian-heng ZHANG ; Xiao-Qing WANG ; Guo-Hua Chen
• 英文论文作者：Yu-bao LIU ; Zhi-hong ZHANG ; Er-xiong ZHAO ; Xian-heng ZHANG ; Xiao-Qing WANG ; Guo-Hua Chen ; Inner Mongolia Niobium Metallurgical Engineering Laboratory ; Baotou Research Institute of Rare earths
• 年：2016
• 作者机构：Inner Mongolia Niobium Metallurgical Engineering Laboratory,Baotou Research Institute of Rare earths;
• 英文论文关键词：melt separation ; slag ; iron ; dephosphorization rate ; niobium recovery rate
• 会议召开时间：2016-09-06
• 会议录名称：2016全国稀土冶炼与环境保护技术交流会会刊
• 语种：英文
• 分类号：TF841.6
• 学会代码：ZGXT
• 会议名称：2016全国稀土冶炼与环境保护技术交流会
• 会议地点：中国广西南宁
• 主办单位：中国稀土学会环境保护专业委员会、中国稀土学会化学和湿法冶金专业委员会、中国稀土学会火法冶金专业委员会
• 学会名称：中国稀土学会
• 页数：7
• 文件大小：708k
• 原文格式：O
• 会议级别：全国

摘要

This paper takes Bayan Obo ferroniobium ore concentrate block after pre-reduction as the raw material,and then studies the physical properties of niobium enriched slag and the change rules of niobium recovery rate and dephosphorization rate in the slag under different melt separation conditions through the melt separation test.The results prove that:niobium recovery rate and dephosphorization rate in the slag will be decreased along with the increase of melt separation temperature;niobium recovery rate in the slag will be firstly increased and then decreased along with the increase of alkalinity and the time extension;dephosphorization rate in the slag will be increased along with the increase of alkalinity and the time extension.When the alkalinity is 0.6-0.7,the time is 7-10 min,and the temperature is 1400-1450℃,niobium recovery rate and the dephosphorization rate can be over 96%,and 95%respectively.Through observing SEM,we can see that within the slag phase,niobium is mainly existed in the form of calcium and titanium silicate,with uneven distribution.
This paper takes Bayan Obo ferroniobium ore concentrate block after pre-reduction as the raw material,and then studies the physical properties of niobium enriched slag and the change rules of niobium recovery rate and dephosphorization rate in the slag under different melt separation conditions through the melt separation test.The results prove that:niobium recovery rate and dephosphorization rate in the slag will be decreased along with the increase of melt separation temperature;niobium recovery rate in the slag will be firstly increased and then decreased along with the increase of alkalinity and the time extension;dephosphorization rate in the slag will be increased along with the increase of alkalinity and the time extension.When the alkalinity is 0.6-0.7,the time is 7-10 min,and the temperature is 1400-1450℃,niobium recovery rate and the dephosphorization rate can be over 96%,and 95%respectively.Through observing SEM,we can see that within the slag phase,niobium is mainly existed in the form of calcium and titanium silicate,with uneven distribution.

引文

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