Recovery of Ti from Titanium-bearing Blast Furnace Slag by Aluminum
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摘要: 利用铝热法对含钛高炉渣进行还原,还原后的产物为钛硅铝合金和高铝渣,可实现有价元素钛的初步富集。试验结果表明,铝热法还原含钛高炉渣在技术上是可行的,短时间即可实现渣中钛的有效分离。影响冶炼效果的主要因素包括:反应温度、反应时间、还原剂的合理配比、助熔剂CaO的添加量。采取的反应温度为1 600℃,w渣:wAl=100:25.98的反应条件下,10 min即可反应完全;同时,添加一定量的CaO有助于实现渣金分离。Abstract: The recovery of Ti from titanium slag by alu minum was investigated.After smelting,Ti-Si-Al alloy and slag with high content of alumina were obtained.It is indicated from the experimental results that the recovery of Ti from titanium-bearing blast furnace slag by aluminum is technically feasible.The effective enrichment and separation can be achieved in a short time.The main factors affecting the smelting results are temperature,time,contents of reducing agent aluminum and flux CaO.The effective enrichment and separation can be achieved with wslag:wAl=100:25.98 at 1 600℃ for 10 min.At the same time,adding CaO is helpful to achieve the separation of the alloy and slag.
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Key words:
- Ti-Si-Al alloy /
- thermite method /
- titanium slag /
- aluminum /
- CaO
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