Outotec (Finland) Oy

Outotec Oyj

Metso Outotec Finland Oy

Metso Metals Oy

Jochen Güntner

Nikola Anastasijevic

Karl-Heinz Daum

Jörg Hammerschmidt

Alexandros Charitos

Peter Sturm

Hannes Storch

Günter Schneider

Gunnar Berg

Maciej Wrobel

Åke Holmström

Karin Lundholm

Markus Buchmann

Ake Holmström

Eberhard Schmidt

Franz Schulz

Christian Mattich

Ioannis Chatzilamprou

Dr-Ing Jörg Hammerschmidt

Martin KÜNSCH

Ake Holmstrom

Stefan Bräuner

A process for roasting of metal concentrate wherein concentrate particles are fed into a roaster where they are thermally treated at a temperature in the range of 500 and 1200&#xb0; C. in a fluidized bed to form a calcine. At least parts of the calcine are withdrawn from the roaster together with a gas stream as a solid fraction. Concentrate particles with a diameter at least 50% smaller than the average diameter of the concentrate particles are separated as small particles and/or particles from the gas-solid-fraction are separated in at least one step as small calcine particles and/or particles are gained in another hydrometallurgical step as other particles. Defined particles are pelletized, whereby at least 80% of the pellets feature a diameter of at least 80% of the concentrate particles average diameter. The pellets are fed into the roaster.

Process and apparatus for roasting of metal sulfide concentrates and/or residues

In a process for producing uranium and/or at least one rare earth element selected from the group consisting of cerium, dysprosium, erbium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium and yttrium out of an ore, the ore is mixed with sulphuric acid with a concentration of at least 95 wt.-% to a mixture, wherein the mixture is granulated to pellets. The pellets are fed into at least one fluidized bed fluidized by a fluidizing gas for a thermal treatment at temperatures between 200 and 1000&#xb0; C. The at least one fluidized bed is developed such that it at least partly surrounds a gas supply tube for a gas or a gas mixture fed into the reactor and the gas or gas mixture is used as a heat transfer medium.

Process and apparatus for producing uranium or a rare earth element

A method for the treatment of flue dusts containing arsenic and/or antimony from pyrometallurgical methods, wherein a reducing agent is added to the flue dusts, the flue dusts are heated together with the reducing agent, and volatile components are separated from a slag. The reducing agent is a carbonaceous compound.

Method and plant for removing arsenic and/or antimony from flue dusts

A process and a plant for treating ore concentrate particles containing valuable metal and having at least arsenic and sulfur containing components. The process comprises a two-stage roasting process comprising a first roasting step and a second roasting step. A gas mixture is formed from the first process gas component obtained from the first roasting step and from the second process gas component obtained from the second roasting step. Post combustion of the gas mixture is made in a post combustion chamber that uses the sulphide rich first process gas component and the second process gas component as oxidizer gas in order to decompose SOin the gas mixture. The exit gas is exposed to subsequent gas cooling and dust removal steps.

Process and plant for treating ore concentrate particles containing valuable metal

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Kahl, Germany

Jochen Güntner