碱法处理含钛高炉渣的矿相变化及工艺条件探索

何思祺; 孙红娟; 彭同江; 吴逍

doi:10.7513/j.issn.1004-7638.2015.06.009

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碱法处理含钛高炉渣的矿相变化及工艺条件探索

doi: 10.7513/j.issn.1004-7638.2015.06.009

何思祺^1,2,
孙红娟^1,2,
彭同江^1,2,
吴逍^1,2

1. 固体废物处理与资源化省部共建教育部重点实验室, 四川绵阳 621010;
2. 西南科技大学矿物材料及应用研究所, 四川绵阳 621010

基金项目:

四川省创新团队项目(14TD0012), 西南科技大学研究生创新基金资助项目(14ycx0036)。

详细信息

作者简介:
何思祺(1989-),女,四川广安人,硕士生,主要从事尾矿资源化利用相关研究。

中图分类号: TF823,X757
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- 文章访问数: 33
- HTML全文浏览量: 7
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2015-04-28

Technological Conditions and Mineralogical Changes of Alkaline Treatment on Ti-bearing Blast Furnace Slag

1. Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Mianyang 621010, Sichuan, China;
2. Institute of Mineral Materials & Application, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

摘要

摘要: 采用XRF、XRD和金相显微镜分析含钛高炉渣的化学成分、物相组成和矿物形态,发现渣中含钛量高达20%,主要矿物相为钙钛矿、透辉石和镁铝尖晶石,各物相结合紧密、分布均匀。将Na₂CO₃与含钛高炉渣进行高温混合焙烧,焙烧熟料用去离子水进行水浸处理,以实现对含钛高炉渣中Si、Al组分的提取,同时实现对Ti组分的富集,达到分离三种有价组分的目的。通过研究焙烧温度、碱渣质量比和焙烧时间对组分浸取率的影响以及焙烧过程中矿物相的变化,结果表明:在焙烧过程中镁铝尖晶石先于透辉石与助剂Na₂CO₃发生反应,而钙钛矿不与Na₂CO₃发生反应。优化的焙烧条件为:焙烧温度900℃,碱渣质量比为2∶1,焙烧反应时间180 min,此条件下SiO₂和Al₂O₃的提取率分别达到47.52%和82.97%。
- 含钛高炉渣 /
- 加碱焙烧 /
- 活化 /
- 浸取 /
- 组分分离
Abstract: Ti-bearing blast furnace slag is the industrial waste produced by blast furnace ironmaking in Panzhihua steel plant,and the results of XRD,XRF and metallurgical microscopy analysis of the slag suggest that the main mineral phase includes perovskite,diopside and spinel with 20% of titanium content,and the mineral facies are closely combined. This research adopted alkaline calcinations to dispose the Ti-bearing blast furnace slag and then used deionized water to leach the roasted product for the recovery of SiO₂,Al₂O₃ and the enrichment of titanium component,which can realize separation of the three kinds of valuable component.Through researching the effects of the calcination temperature and time,mass ratio of Na₂CO₃ to slag on the extraction efficiency of SiO₂ and Al₂O₃ and the mineralogical changes in the reaction process,the results show that the spinel precedes diopside to react with Na₂CO₃ but perovskite does not react with the additives. Under the following optimum conditions: calcination temperature 900 ℃,mass ratio of Na₂CO₃ to slag 2:1 and reaction time 180 min,47.52% SiO₂ and 82.97% Al₂O₃ can be extracted.
- Ti-bearing blast furnace slag /
- alkali roasting /
- activation /
- leaching /
- component separation