摘要
我国钒钛磁铁矿经高炉法冶炼后钛资源基本都富集在渣相中,结构复杂,无法进一步回收利用,造成钛资源无法有效利用和环境污染等问题。归纳了国内外含钛高炉渣综合利用方面的研究成果,从整体利用和提钛2方面分别讨论了目前已开发的利用方法所存在的问题。整体利用含钛高炉渣(如制作建筑材料、特种功能材料等)法虽然能解决堆积产生的环境问题,但经济附加值低,且大量的钛资源被浪费,对钛资源的利用率低。在含钛高炉渣提钛利用方法中,直接酸解法或者碱法处理制备的产品品质低,经济性差,还会带来二次污染;含钛高炉渣制备含钛合金的方法成本高、产品应用范围窄;选择性富集分选法提钛时含钛矿物的转变不彻底,并且能耗高、添加剂消耗量大,钛的回收率不高;高温碳化—低温氯化工艺中高温碳化过程可以利用液态炉渣的物理热,大幅降低了碳化工序的能耗,低温氯化过程可在400~550℃实现Ti C的选择性氯化,避免了钙镁等杂质的影响,且氯化产物杂质含量低,钛回收率高,产品价值高、市场大。在此基础上,指出高温碳化—低温氯化处理含钛高炉渣具备工业化应用前景,值得进一步开展研究。
The titanium resources of vanadium titanomagnetite concentrate are enriched in the Ti-bearing blast furnace slag after the blast furnace smelting in China. The Ti-bearing blast furnace slag has complex compositions so that it can＇ t be comprehensive utilized.The Ti-bearing blast furnace slag not only brings a huge environment pollution but also lead to the waste of titanium resource.The development of study on comprehensive utilization of Ti-bearing blast furnace slag were summarized,emphases the problems existing on the direct-utilization methods and extraction of titanium from Ti-bearing blast furnace slag.Directly utilize the slag（ such as make building material and function material） have a disappoint results of titanium utilization efficiency and has little beneficiation value,although it can solve the environmental problems caused by the accumulation. The methods of extracting titanium,via direct acid preparation or alkaline treatment,product quality and economical efficiency is low,can cause secondary pollution; blast furnace slag containing titanium produce titanium alloy cost is high,the product application range is narrow; titanium minerals shift not thoroughly by selective enrichment and separation method to extractive titanium,and high energy consumption,large consumption of additives,titanium recovery rate is not high; High temperature carbonization and low temperature chlorination process,the high temperature carbonization process can make use of physical heat of liquid slag,greatly reduce the carbonization process of energy consumption,low temperature chlorination process can be realized in 400 - 550 ℃ Ti C selective chlorination,avoid the influence of impurities such as calcium,magnesium,and chloride products of low content of impurities,titanium recovery rate is high,the product value is high.On this basis,points out that the high temperature carbonization and low temperature chlorination method has industrialization prospect,deserves further research.
作者
景建发
郭宇峰
郑富强
谢小林
杨凌志
陈凤
Jing Jianfa;Guo Yufeng;Zheng Fuqiang;Xie Xiaolin;Yang Lingzhi;Chen Feng(School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China)
出处
《金属矿山》
CAS
北大核心
2018年第4期185-191,共7页
Metal Mine
关键词
钒钛磁铁矿
含钛高炉渣
综合利用
提钛
Vanadium titanomagnetite, Ti-bearing blast furnace slag, Comprehensive utilization, Extracting titanium
