Vacuum Carbothermic Reduction of Panzhihua Ilmenite Concentrate: A Thermodynamic Study
Vacuum Carbothermic Reduction of Panzhihua Ilmenite Concentrate: A Thermodynamic Study
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DOI：
10.1080/08827508.2017.1281129
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发表时间：
2017-01
影响因子：
5
通讯作者：
Huang Run;Liu Pengsheng;Yu Yuehui;Z. Jinzhu
中科院分区：
文献类型：
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作者：
Huang Run;Liu Pengsheng;Yu Yuehui;Z. Jinzhu
摘要电弧炉主要用于生产高钛渣，但由于杂质无法去除，给氯化法生产钛白粉带来困难。因此，低品位钛铁矿，特别是我国攀枝花钛精矿，除杂是处理的关键。对攀枝花钛精矿真空碳热还原进行了理论计算。因此，当温度高于1600°C且碳量大于12%时，所有Fe几乎进入气相。当温度高于1300 ℃，碳量大于14%时，镁也进入气相。当温度高于1100°C时，大部分元素锰在气相中挥发。TiO2品位随碳量的增加而增加（14%）。当温度高于1600°C，碳量小于14%时，渣相中TiO2品位达到最大值，可用于氯化法制备钛白粉。
ABSTRACT Electric arc furnace is mainly used in the production of high titania slag; however, since impurities cannot be eliminated, this causes difficulty in the production of titania pigment with chlorination process. Consequently, removing impurities is the crucial way to deal with low-grade ilmenite, especially for the Panzhihua ilmenite concentrate in China. This article studied the theoretical calculation of vacuum carbothermic reduction of Panzhihua ilmenite concentrate. Thus, when the temperature was higher than 1600°C and the carbon amount was greater than 12%, all of the Fe almost entered into the gas phase. When the temperature was higher than 1300°C and the carbon amount was greater than 14%, magnesium also entered the gas phase. When the temperature was higher than 1100°C, most of the element manganese was volatilized in the gas phase. The TiO2 grade increased with the increase in carbon amount (14%). When the temperature was higher than 1600°C and the carbon amount was less than 14%, the TiO2 grade in the slag phase could reach the maximum value, which can be used for the chlorination process to prepare titanium dioxide.