C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/317
C22B 19/30 (2006.01) C22B 1/16 (2006.01) C22B 4/02 (2006.01) C22B 4/04 (2006.01) C22B 7/02 (2006.01) C22B 19/04 (2006.01) C22B 19/20 (2006.01) C22B 19/28 (2006.01)
Patent
CA 2032554
ABSTRACT The present invention relates to a method for recover zinc from zinc-containing materials, especially from zinc-containing material recovered from waste gases in metallurgical smelting processes. Particulate zinc-containing materials are agglomerated together with a carbonaceous reduction material and optionally slag forming materials, and are supplied to a gas tight closed electrothermic smelting furnace containing a molten bath kept at a temperature between 1200 and 1700°C in which the agglomerates are smelted and subjected to selective reduction and volatilization of zinc and other volatile metals. An inert slag phase and optionally a liquid metal phase are tapped from the smelting furnace, and zinc and other volatile metals are recovered from the waste gas from the smelting furnace by condensation. In order to prevent reoxidation of metallic zinc the particulate zinc-containing materials are agglomerated together with a carbonaceous binder which cracks at a temperature below 700°C and forms carbon black, and that the temperature in the gas atmosphere in the smelting furnace is kept above 1000°C in order to maintain a volume ratio between C02 and CO in the gas atmosphere in the smelting furnaces below 0.3.
Aune Jan A.
Eikeland Inger J.
Pedersen Thor
Aune Jan A.
Eikeland Inger J.
Elkem Technology A/s
Macrae & Co.
Pedersen Thor
LandOfFree
Method for recovering zinc from zinc-containing waste materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for recovering zinc from zinc-containing waste materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovering zinc from zinc-containing waste materials will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1901008