梯度磁选-涡流还原法制备钛硅铁合金  

Preparation of Ti-Si-Fe Alloy by Gradient Magnetic Separation-Vortex Reduction

作　　者：王坤[1] 刘燕[1] 邢斐 张廷安[1] Wang Kun;Liu Yan;Xing Fei;Zhang Ting’an(Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819

出　　处：《稀有金属材料与工程》2021年第6期2254-2257,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(U1760120,U1710257,U1702253,U1903129);国家重点研发计划子课题(2017YFC0210404)。

摘　　要：针对低品位含钛多金属矿储量巨大无法直接利用的现状,提出了梯度磁选-涡流还原法制备钛硅铁合金新工艺。先通过弱磁选处理低品位含钛多金属矿,得到弱磁铁精粉产品,弱磁尾矿经中磁选得到中磁含钛精矿。对中磁含钛精矿进行涡流熔融还原,得到钛硅铁合金。结果表明,铁能有效降低二氧化硅的还原温度。二氧化钛的直接碳热还原限制环节是低价钛氧化物的还原(TiO→Ti)。硅和铁能降低二氧化钛的碳热还原温度,实现钛硅铁合金的成功制备。In view of the status quo of huge reserves of low-grade titaniferous polymetallic ore that could not use directly, a gradient magnetic separation-vortex reduction method for preparation of Ti-Si-Fe alloy was proposed. The low-grade titaniferous polymetallic ore was processed by dry flux weakening magnetic separation to obtain the magnet powder products. And the medium magnetic titanium concentrate was obtained by medium magnetic separation. The medium magnetic titanium concentrate was used to prepare the Ti-Si-Fe alloy by vortex smelting reduction method. The results show that the reduction temperature of silica and carbon can be reduced effectively by the generated iron. In the process of direct carbothermal reduction of titanium dioxide, the restrictive link is the reduction of low-valence titanium oxide(Ti O→Ti). The generated silicon and iron could reduce the carbothermal reduction temperature of titanium dioxide to realize the successful preparation of Ti-Si-Fe alloy.

关 键 词：含钛多金属矿 梯度磁选 涡流还原 钛硅铁合金 

分 类 号：TF19[冶金工程—冶金物理化学]