Preparation of High-Grade Titania Slag from Ilmenite-Bearing High Ca and Mg by Vacuum Smelting Method
Preparation of High-Grade Titania Slag from Ilmenite-Bearing High Ca and Mg by Vacuum Smelting Method
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DOI：
10.1007/s11663-013-9982-x
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Kai Zhang;X. Lv;Run Huang;B. Song;Fei Xi
中科院分区：
文献类型：
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作者：
Kai Zhang;X. Lv;Run Huang;B. Song;Fei Xi
中国攀西地区出产的钛铁矿含有较高的钙、镁等杂质。采用传统的钛铁矿处理方法——电弧炉法，可获得高品位钛渣。因此，攀西钛铁矿制备的钛渣中CaO和MgO含量较高，超过了渣含量的5%。CaO和MgO的高含量给流化氯化法生产二氧化钛（TiO2）白带来了相当大的困难。在本研究中，发现了一种新的真空分离工艺来生产高档tio2材料。研究了分离温度和分离时间对tio2品位的影响。该方法可在1823 K（1550°C）温度下在45分钟内制备出TiO2含量为93%、MgO含量< 0.1%、SiO2含量< 1.2%、CaO含量< 0.5%的高品位TiO2渣。
Ilmenite produced from the Panxi area in China has high impurities such as Ca and Mg. High-grade titanium (Ti) slag can be obtained by the electric arc furnace process, a traditional method of treating ilmenite. Thus, Ti slag prepared from the Panxi ilmenite contains high CaO and MgO, exceeding 5 pct of the slag content. This high CaO and MgO content confers considerable difficulty in producing titania (TiO2) white using fluidizing chlorination. In this study, a new process named vacuum separation was found to produce high-grade TiO2materials. The effects of separation temperature and time on the TiO2grade were studied. The high-grade TiO2slag, which has 93 pct TiO2, <0.1 pct MgO, <1.2 pct SiO2, and <0.5 pct CaO, can be produced at 1823 K (1550 °C) in 45 minutes through the proposed method.