Removal of mechanical additives from the surface of cast niobium

Proceedings of the Estonian Academy of Sciences

Mihhail Kogtev¹  Rein Munter¹  Valeri Gorkunov¹ 

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关键词: wastes utilization;    metallothermy;    alloys production;    shaft furnace deposits;    thermomechanical utilization;   

DOI  :  10.3176/proc.2008.4.06

学科分类：化学（综合）

来源: Teaduste Akadeemia Kirjastus

【 摘 要 】

A combined method of the utilization of deposits from the shaft furnace of niobium production consisting of the stages of thermomechanical treatment, hydrogenation, grinding, and separation was elaborated in industrial conditions. This method enables to clean the surface of metallic niobium from slag (3CaO·5Al2O3) and from graphite additives. Altogether more than 20 tonnes of Nb–Al (5%) powder meeting the requirements presented to commercial technical niobium was produced. Application of the proposed utilization technology increases the profitability of pure niobium production by 0.2–0.3%. The results obtained can be used for cleaning other refractory metals from slag and other surface additives.

【 授权许可】

Unknown