Process for the volatilization of zinc and/or lead from metallurgical material

US4200454A · kind A · utility

Assignees

• Metallgesellschaft AG · DE
• St. Joe Minerals Corporation · US

Inventors

• Carl-August Maelzer · Prien am Chiemsee, DE
• Martin Rahn · Frankfurt am Main, DE
• Lothar Reh · Zumikon, CH
• Bernd Thone · Friedberg, DE
• Karel Vydra
• David Rice · Chandler, US

Key dates

• Filing date: Mar 31, 1978
• Grant date: Apr 29, 1980
• Expiry date: Mar 31, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Zinc and, if desired, lead are volatilized from a metallurgical material such as a finely divided oxidic ore, ore concentrate or another metallurgical intermediate. The volatilization of the zinc is carried out at a temperature above 1300.degree. C. in a cyclone chamber which has an axis that is substantially horizontal, i.e. is inclined to the horizontal at an angle of 0.degree. to 15.degree.. Carbon dioxide is removed from the gas leaving the zinc condensing stage and the high carbon monoxide gas thus obtained is recycled to the cyclone chamber or at another point ahead of the condensation stage.