Reaction mechanism of titanium-bearing steel slag roasting in NaOH melt

被引：0

作者：

Zhao C. ^{[1
]}

Ning Z. ^{[1
]}

Zhang C. ^{[1
]}

Cai Y. ^{[1
,2
]}

Wang Y. ^{[1
]}

Shao P. ^{[1
]}

Li J. ^{[1
]}

机构：

[1] School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan

[2] Chengdu Iron & Steel Co., Ltd., Pangang Group, Panzhihua

来源：

Zhao, Changming (lnzhaochangming@163.com) | 2018年 / Central South University of Technology卷 / 49期

基金：

中国国家自然科学基金;

关键词：

Kinetics; Melting; Roasting; Titanium-bearing steel slag;

D O I：

10.11817/j.issn.1672-7207.2018.12.002

中图分类号：

学科分类号：

摘要：

With consideration of the high content of calcium and phosphorus, titanium-bearing steel slag was roasted with NaOH to investigate the effects of roasting temperature, roasting time and mass ration of alkali-to-ore on the TiO 2 extraction rate. The kinetics of the roasting process were analyzed. The results show that the optimal conditions of titanium-bearing steel slag reacted with NaOH melt are as follows: roasting temperature 450 ℃, alkali-to-ore ratio 6:1 and roasting time 60 min. The roasting process is found to be diffusion controlled at temperature of 350-500 ℃. The apparent activation energy is 10.77 kJ/mol, and the kinetic equation can be described as follows: 1-2X/3-(1-X) 2/3 = 1.239exp[-39.4/(RT)]t. The complete decomposition of the main phases (Mg 2 TiO 4 , MnTi 2 O 4 , CaTiO 3 ) in titanium-bearing steel slag after roasting with NaOH has created favorable conditions for the extraction of titanium. © 2018, Central South University Press. All right reserved.

引用

页码：2908 / 2914

页数：6

共 15 条

[1] Kadam A.N., Dhabbe R.S., Kokate M.R., Et al., Preparation of N doped TiO 2 via microwave-assisted method and its photocatalytic activity for degradation of malathion , Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy, 133, 10, pp. 669-676, (2014)
[2] Mohammadi S., Harvey A., Boodhoo K.V.K., Synthesis of TiO 2 nanoparticles in a spinning discreactor , Chemical Engineering Journal, 258, 15, pp. 171-184, (2014)
[3] Yu R., Liu Z., Pourpoint F., Et al., Nanoparticulate TiO 2 (B): an anode for lithium-ion batteries , Angewandte Chemie International Edition, 51, 9, pp. 2164-2167, (2012)
[4] Feng X.J., Zhu K., Frank A.J., Et al., Rapid charge transport in dye-sensitized solar cells made from vertically aligned single-crystal rutile TiO 2 nanowires , Angewandte Chemie International Edition, 51, 11, pp. 2727-2730, (2012)
[5] Zhang Y., Recovery of titanium from titanium bearing blast furnace slag by sulphate melting, Canadian Metallurgical Quarterly, 53, 4, pp. 440-443, (2014)
[6] Wang S., Zhang Y., Xue X., Et al., Recovery of titanium from titanium-bearing blast furnace slag by ammonium sulfate melting method, CIESC Journal, 63, 3, pp. 991-995, (2012)
[7] Huo D., Liang J., Li H., Et al., Research progress on extracting titanium from blast furnace slag containing titanium, Hot Working Technology, 46, 3, pp. 13-15, (2017)
[8] Li X., Yu H., Zhang H., Et al., Preparation of nano TiO 2 from Ti-bearing blast furnace slag by molten salt method , CIESC Journal, 66, 2, pp. 827-833, (2015)
[9] He S., Sun H., Tan D., Et al., Recovery of titanium compounds from ti-enriched product of alkali melting Ti-bearing blast furnace slag by dilute sulfuric acid leaching, Procedia Environmental Sciences, 31, pp. 977-984, (2016)
[10] Xiong Y., Li C., Liang B., Et al., Leaching behavior of air cooled Ti-bearing blast-furnace slag in hydrochloric acid, The Chinese Journal of Nonferrous Metals, 18, 3, pp. 557-563, (2008)

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