Enrichment of low grade reduced titanium slag by H3PO4 activation roasting and acid leaching

Bin Nian Zhong, Tian Yan Xue, Guo Ping Hu, Wei Liang Chen, Li Na Wang, Tao Qi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Titanium-containing slag produced by coal-based DR-EAF smelting was used and enriched by H3PO4 activation roasting and acid leaching, the phase components in the slag included anosovite, pyroxene (glass), Taki stone and spinel. The crystalline transformation of the slag during the roasting process was studied at different roasting temperatures and times, and H3PO4 mass content. The effects of acid leaching temperature, sulfuric acid concentration, mass ratio of liquid to solid and leaching time on the leaching rate of main impurities such as Ca, Mg, Al and Si were examined. The optimal conditions obtained were: roasting temperature 1273 K, roasting time 100 min, H3PO4 content 7.1%, acid leaching temperature 110°C, sulfuric acid concentration 5%, mass ratio of liquid to solid 10:1 and leaching time 120 min. Under the optimal conditions, the content of TiO2 in the slag was raised from 52.54% to 68.31%.

Original languageEnglish
Pages (from-to)378-384
Number of pages7
JournalGuocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering
Volume13
Issue number3
Publication statusPublished - 1 Jun 2013
Externally publishedYes

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