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텅스텐 추출공정에 관한 고찰

A Review of Tungsten Extraction Processes

HWAHAK KONGHAK, October 1982, 20(5), 315-334(20), NONE
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Abstract

여러 가지 고온용 금속중에서 텅스텐은 1,370 ℃ 이상에서 중량당 강도가 특출히 높아서 고온에서의 응용도가 크다. 지난 30년 동안에 텅스텐 추출방법의 향상과 또 광석에서 금속까지 거치는 공정수를 감소하기 위한 새로운 방법의 발명에 관한 연구가 진행되어 왔다. 이 총설에서는 텅스텐 광물의 분포와 선광법을 간단히 소개한 후에 wolframite와 scheelite로부터의 추출법과 산화텅스텐의 환원방법을 고찰하였다. 이어서 폐금속물에서부터의 회수방법과 현재의 연구동향을 요약했다.
Amongst various refractory metals, tungsten has the greatest potentiality for high temperature applications due to its exceptional strength to weight ratio at temperatures above 1,370 ℃ (2,500 ℉). During the past three decades significant research efforts have been directed towards the improvement of the conventional methods of tungsten extraction and to devop new processes to reduce the number of steps from ore to metallic tungsten. In this paper geological occurrence of tungsten minerals and principles of benefication methods are outlined. The commercial processes of extraction from wolframite and scheelite and different approaches to the reduction of tungstic oxide are discussed. Methods of recovery from scrap and the current research efforts are also reviewed.

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