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Experimental Study on Acid Leaching of Titanium Slag of NaCO3 Roasting

YANG Zhihong,SONG Qunling,LI Yongjia,LI Yingjuan   

  1. Faculty of Metallurgy and Materials Engineering,Kunming Metallurgy College,Kunming 650033,China
  • Received:2018-06-11 Online:2018-06-30 Published:2018-06-30

Abstract: The TiO2 is low in content of titanium slag produced by electric furnace melting,and it is not suitable for the preparation of titanium white pigment and sponge titanium.Solid solution of anosovite (Me,Me=Ti,Fe,Mg,Mn) intitanium slag,can not be dissolved by hydrochloric acidic.However,after the roasting of NaCO,the structure of the solid solution of the anosovite is destroyed,and dilute hydrochloric acid can dissolve Fe,Mg,Mn,Ca,Al,Si and other impurities in the titanium slag under certain conditions.The effects of hydrochloric acid concentration,acid leaching temperature,acid leaching time and agitation in tensity on acid leaching of soda roasted titanate slag were investigated with the use of soda roasting-acid leaching-calcination process.Through experiments,the best process parameters were obtained:hydrochloric acid mass concentration 20%,acid leaching temperature 110℃,acid leaching time 1.5h,stirring intensity 350r/min.The content of TiO2 in the calcination product is 95%.

Key words: titanium slag, NaCO3 roasting, acid leaching

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