预还原铌精矿熔选过程中铌磷行为

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Journal of Iron and Steel Research(International) Pub Date : 2017-07-01 DOI:10.1016/S1006-706X(17)30104-8
Yu-bao Liu , Zhi-hong Zhang , Er-xiong Zhao , Xian-heng Zhang , Xiao-qing Wang , Guo-hua Chen
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引用次数: 0

摘要

以预还原的白云鄂博铌铁精矿块为原料,研究了富铌渣的物理性质及铌回收率的变化。此外,通过熔融分离试验,研究了不同熔融分离条件下渣的脱磷率。研究结果表明:(1)随着熔分温度的升高,渣的铌回收率和脱磷率降低;(ii)矿渣铌回收率随碱度和时间的增加先升高后降低;(3)渣的脱磷速率随碱度和时间的增加而增加。试验在碱度为0的条件下进行。6 - 0。7、时间为7 ~ 10 min,温度为1400 ~ 1450℃,铌的回收率和脱磷率分别超过96%和95%。通过扫描电镜观察,铌主要以钙和硅酸钛的形式存在于渣相中,且分布不均匀。
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Niobium and phosphorus behavior during melting-separation process of pre-reduced niobium ore concentrate

The pre-reduced Bayan Obo ferroniobium (FeNb) ore concentrate block was taken as raw materials for studying the physical properties of niobium-enriched slag and changes in niobium recovery rate. In addition, the dephosphorization rate of the slag under different melting-separation conditions was investigated using the melting-separation test. The research results demonstrate that (i) the niobium recovery rate and dephosphorization rate of the slag decrease with the increase in melting-separation temperature; (ii) the niobium recovery rate of the slag initially increases and then decreases with increase in basicity and time; and (iii) the dephosphorization rate of the slag increases with the increase in basicity and time. When the test was performed under the conditions of basicity of 0. 6 – 0. 7, time of 7–10 min, and temperature of 1400–1450 °C, the niobium recovery rate and dephosphorization rate are over 96% and 95%, respectively. By scanning electron microscopy, it is observed that niobium mainly exists in the form of calcium and titanium silicate within the slag phase, with uneven distribution.

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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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