Article | REF: M2378 V1

Tungsten metallurgy and recycling. Processes

Author: Henri PASTOR

Publication date: December 10, 2000

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


2. Mining and mineral processing

History

In 1781, the Swedish chemist C.W. Scheele isolated an unknown acid (tungstic acid) from a white mineral identified and named "tungsten" (heavy stone in Swedish) by A.F. Cronstedt in 1758, and named "scheelite" (CaWO 4 ) in 1821 by C.C. Leonhard.

Another mineral, "wolframite" [(Fe, Mn), WO 4 ], is mentioned under the term "wolfram" in a manuscript by J. Mathesius dated 1564. It was from wolframite that Spanish chemists J.J. and F. de Elhuyar also prepared tungstic acid and isolated, identified and named tungsten, in 1783, by reducing this acid with carbon.

2.1 Mining situation

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Metal manufacturing processes and recycling

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Mining and mineral processing
Outline