Basic principles of environmentally sound elechtrochemical technology for processing sintered carbide scrap for hard-alloy industry

被引：0

作者：

Tarasov, A. V. ^{[1
]}

Bryukvin, V. A. ^{[2
]}

Palant, A. A. ^{[2
]}

Grachova, O. M. ^{[2
]}

机构：

[1] State Res Inst Non Ferrous Met GINTSVETMET, Fed State Unitary Enterprise, 13 Acad Korolyov St, Moscow 129515, Russia

[2] Russian Acad Sci, AA Baikov Met Inst, IMET RAN, Moscow 117911, Russia

来源：

SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 1: THERMO AND PHYSICOCHEMICAL PRINCIPLES: NON-FERROUS HIGH-TEMPERATURE PROCESSING | 2006年

关键词：

electrochemical; carbide waste; hard-alloy; sintered carbides;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Regeneration of carbide waste from hard-alloy (sintered carbide) manufacture is an important scientific and technical objective aimed at improving the degree of recycling of rare metals (W, Co, Ta, Ti, Nb). Currently, the degree of recycling of those metals does not exceed 25% to 35% of their total production even in industrially developed countries. This is attributed to a significant extent to the substantial drawbacks of the technologies applied for their processing (environmental pollution, limitations to the use of regenerated products for important applications, sophisticated equipment to be used). An innovative environmnentally sound technology has been developed in the Institute of Metallurgy of the Russian Academy of Sciences (IMET RAN) for processing of carbide waste of WC, TiC, TTC and other carbides using asymmetric alternating current of industrial frequency (the electrolyte used for this purpose is nitric acid solution). The current efficiency under optimal conditions is as high as 96% to 98%. The process has been tested on bench scale. The following commercial-grade products are obtained: pure ammonium paratungstate, tringstic acid, cobalt oxide, titanium dioxide and tantalum-niobium concentrate. The total metals recovery is 98% to 99%.

引用

页码：521 / +

页数：2