In situ carbothermic reduction of a ferro-columbite concentrate in the recovery of Nb and Ta as metal matrix composite from tin smelting slag waste dump
In situ carbothermic reduction of a ferro-columbite concentrate in the recovery of Nb and Ta as metal matrix composite from tin smelting slag waste dump
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DOI：
10.1016/j.matdes.2003.10.015
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发表时间：
2004-06-01
影响因子：
8.4
通讯作者：
Simbi, DJ
中科院分区：
文献类型：
--
作者：
Mudzanapabwe, NT;Chinyamakobvu, OS;Simbi, DJ
在1200-1400℃的温度范围内，用粗精矿和粉状精矿，以牧草煤和焦炭为还原剂，研究了从锡冶炼渣场中回收的一种锰铁矿粉的碳热还原。用X射线衍射仪(X射线衍射仪)和电子探针显微分析(EMPA)技术鉴定了铁基中的NbC和TAc碳化物是原位碳热反应金属基复合材料(MMC)产物的主要成分。转换的程度。X-B随钛铁精矿的粒度、使用的还原剂类型、温度和反应时间的不同而不同。与冶金焦相比，牧草煤具有较高的反应活性和较低的灰分，因此具有较好的还原效果。(C)2003爱思唯尔有限公司。保留所有权利。
The in situ carbothermic reduction of a ferro-columbite recovered from a tin smelting slag waste dump was investigated ill the temperature range 1200-1400degreesC using coarse and pulverised concentrate with collie coal and coke as reducing agents. Carbides of niobium (NbC) and tantalum (TaC) in an iron matrix were identified by X-ray diffraction (XRD) and electron probe microanalysis (EMPA) techniques, as the major constituents of the metal matrix composite (MMC) product of in situ carbothermic reaction. The extent of conversion. X-B was found to vary depending on the particle size of the ferro-columbite concentrate, the type of reductant used, temperature and reaction time. The efficacy of collie coal as a reductant is due to its high reactivity and low ash content when compared with metallurgical coke. (C) 2003 Elsevier Ltd. All rights reserved.