Influence of cooling methods on decalcification behavior of titanium slags

被引：0

作者：

He B.-L. ^{[1
,2
]}

Qiu G.-Z. ^{[1
]}

机构：

[1] School of Minerals Processing and Bioengineering, Central South University, Changsha

[2] LB Group Co., Ltd., Jiaozuo

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 07期

关键词：

decalcification; leaching; rich-titanium material; titanium slag; water quenching;

D O I：

10.11817/j.ysxb.1004.0609.2023-43728

中图分类号：

学科分类号：

摘要：

Using the titanium slag prepared by electric furnace smelting of ilmenite in Panxi area as the object, based on the ternary phase diagram of CaO-MgO-SiO2, the mineral composition, microstructure and element distribution of the titanium slags cooled by different methods were systematically studied using X-ray fluorescence spectrometer, X-ray diffractometer and scanning electron microscope. The results show that MgO and TiO2 in titanium slag form titanium during natural cooling, and other impurity elements mainly form diopside (CaMgSi2O6) and magnesium and alusite (Ca2MgSi2O7). While, for the water quenched titanium slag, the overall dispersion of slag particles is relatively uniform, and silicon mainly exists in the form of calcium disilicate (CaSi2O5), combining with the glass for each other to form a complex, which is embedded and distributed with black titanium. Moreover, the decalcification efficiency of water quenched cooling titanium slag in the acid leaching process is significantly enhanced. After alkaline desilication, the decalcification rate is 94.26%, and the contents of CaO, SiO2, and TiO2 are 0.12%, 0.49% and 90.1%, respectively. © 2023 Central South University of Technology. All rights reserved.

引用

页码：2247 / 2256

页数：9

共 17 条

[11]

WU Xuan, ZHANG Jian-bo, MIAO Hui-jun, Et al., Study on preparation of high quality titanium-rich materials by hydrochloric acid leaching of Panzhihua titanium slag, Iron Steel Vanadium Titanium, 37, 4, (2016)

[12]

SUI Zhi-tong, GUO Zhen-zhong, ZHANG Li, Et al., Green separation technique of Ti component from Ti-bearing blast furnace slag, Journal of Materials and Metallurgy, 5, 2, (2006)

[13]

ZHANG Ming-bo, QIU Sheng-tao, LI Jian-xin, Et al., Effect of cooling methods on the mineralogical composition and microstructure of low titanium-containing blast furnace slag, Chinese Journal of Engineering, 38, 5, (2016)

[14]

STEBBINS J F., Pentacoordinate silicon in high-pressure crystalline and glassy phases of calcium disilicate (CaSi2O5), Geophysical Research Letters, 26, 16, pp. 2521-2523, (1999)

[15]

ALLIBERT M, GAYE H, GEISELER J, Et al., Slag Atlas, (1995)

[16]

HU Xin-guang, SHEN Feng-man, ZHENG Hai-yan, Et al., Effect of temperature on Al2O3 activity in CaO-SiO2-Al2O3MgO blast furnace slag system, Iron and Steel, 57, 4, (2022)

[17]

HUANG Tao, HUANG Zi-li, XIAO Shuo, Et al., Leaching of iron from strong magnet iron tailings by hydrochloric acid and its kinetics, Hydrometallurgy of China, 42, 1, (2023)

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