Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (10): 1416-1423.DOI: 10.12068/j.issn.1005-3026.2023.10.007

• Materials & Metallurgy • Previous Articles     Next Articles

Leaching Kinetics of Magnesiothermic Self-propagating Products in Preparation of Ti6Al4V Powder by Multistage Deep Reduction Method

YAN Ji-sen, DOU Zhi-he, ZHANG Ting-an   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Published:2023-10-27
  • Contact: ZHANG Ting-an
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Abstract: The leaching process of magnesiothermic self-propagating products in the preparation of Ti6Al4V alloy powder by multi-stage deep reduction method was studied. The effects of raw material particle size, leaching temperature and hydrochloric acid concentration on the leaching process were studied. The results show that temperature and hydrochloric acid concentration have a great influence on the leaching rate of Ti. The apparent activation energy of the Mg leaching reaction was 47.38kJ/mol, and the reaction order was 0.22. The apparent activation energy of Ti leaching reaction was 103.4kJ/mol, and the reaction order was 1.142.Finally,the magnesiothermic self-propagating product with D50 of 59.4μm was selected as the raw material, and the leaching temperature of 30℃ and the hydrochloric acid of 1mol/L were used as the leaching conditions.After 180min of leaching, 92.1% of Mg in the magnesiothermic self-propagating product can be removed, and the loss rate of titanium was 17.5%.

Key words: multistage deep reduction; acid leaching; Ti6Al4V alloy powder; magnesiothermic self-propagating reaction; kinetics

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