Using new flotation reagents to directly float niobium oxide and iron oxide

采用新型浮选药剂直接浮选氧化铌和氧化铁

• 批准号: 445344-2012
• 负责人: Liu, Qi
• 金额: $ 3.17万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=575040
• 关键词: Using; new; flotation; reagents; directly

Many of the iron ore mines, including ArcelorMittal Mines Canada (AMMC) and Cliffs Wabush Mines who support this proposal, use gravity separation and magnetic separation to upgrade the iron ores to smelter grades. However, these separation technologies are not effective in recovering fine iron oxide minerals, which are lost to the tailings. For instance, Cliffs Wabush loses 5.6% of total iron value to the hydrocyclone overflow. Even if half of this amount is recoverd, it would mean an additional revenue of $12 million. AMMC loses the majority of the -75 µm iron oxide value to the spiral tailings. Therefore, it is important that suitable froth flotation reagent schemes and processing technologies, such as proposed in this project, be developed to directly recover the fine iron oxide value from the tailings. The proposed project will also develop flotation depressants to upgrade a niobium oxide concentrate, produced from Niobec Mine by a new collector hydroxamic acid, to market grade. Niobec Mine has been using a cationic collector to recover the niobium value from its ores. However, the cationic collector is not selective to niobium oxide so that the waste rock minerals need to be removed prior to the niobium recovery, which not only leads to complicated processes but also heavy losses of the value. Niobec Mine currently can only recover about 59% of the niobium because of the use of the cationic collector. With the support of a previous NSERC CRD grant, we have identified an anionic hydroxamic acid collector which can directly float the niobium oxide from the Niobec Mill Feed (0.7% niobium oxide), at niobium recovery of over 95% at a rougher concentrate grade of 1.4% niobium oxide. The proposed work is a continuation of the project to increase the concentrate grade to market value (40% niobium oxide) while maintaining high niobium recovery.

许多支持这一提议的铁矿，包括加拿大安赛乐米塔尔矿业公司(AMMC)和克里夫斯·沃布什铁矿，都使用重选和磁选将铁矿石提升到冶炼厂品位。然而，这些分选技术在回收细粒氧化铁矿物方面效果不佳，这些矿物流失到尾矿中。例如，水力旋流溢流使克里夫斯沃布什损失了5.6%的总铁价值。即使收回一半，也会带来1,200万元的额外收入。AMMC失去了-75微米氧化铁值的大部分给螺旋尾矿。因此，开发适合本项目的泡沫浮选药剂方案和加工工艺，直接从尾矿中回收细粒氧化铁价值是非常重要的。 拟议中的项目还将开发浮选抑制剂，将尼奥贝克矿由一种新捕收剂异羟肟酸生产的氧化铌精矿提升到市场级。尼奥贝克矿一直在使用阳离子捕收剂从其矿石中回收铌的价值。但由于阳离子捕收剂对氧化Nb的选择性不高，在回收Nb之前需要去除废石矿物，这不仅工艺复杂，而且价值损失很大。由于使用了阳离子捕收剂，尼奥贝克矿目前只能回收约59%的Nb。在之前NSERC CRD赠款的支持下，我们已经确定了一种阴离子异羟肟酸捕收剂，该收集器可以直接从Nibecc Mill原料(0.7%Nb氧化物)中浮选Nb氧化物，在粗精矿品位为1.4%Nb氧化物的情况下，Nb回收率超过95%。拟议的工作是将精矿品位提高到市场价值(40%氧化Nb)，同时保持较高的Nb回收率的项目的继续。