Metallgesellschaft Aktiengesellschaft

Outotec Oyj

Outotec Oyi

Peter Weber

Martin Hirsch

Andreas Orth

Michael Stroeder

Michael Ströder

Dirk Nuber

Stuart Sneyd

Ernst Wallis

Siegfried Schimo

Uwe Harter

Jochen Freytag

Helmut Hausmann

A plant for the heat treatment of solids containing iron oxide includes a fluidized bed reactor. The reactor includes at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being located above the upper orifice region of the at least one gas supply tube. The gas flowing through the at least one gas supply tube entrains solids from the stationary annular fluidized bed-into the mixing chamber when passing through the upper orifice region of the at least one gas supply tube.

Method and plant for the heat treatment of solids containing iron oxide

A plant for the heat treatment of solids containing iron oxide. The plant includes a reactor including a fluidized bed reactor. The reactor includes a gas supply system disposed in the reactor, a stationary annular fluidized bed which at least partly surrounds the gas supply system, and a mixing chamber. The gas supply system is configured so that gas flowing through the gas supply system entrains solids from the stationary annular fluidized bed into the mixing chamber.

The present invention relates to a method and a plant for producing low 15 temperature coke, in which granular coal and possibly further solids are heated to a temperature of 700 to 1050&#xb0; C. in a fluidized-bed reactor () by means of an oxygen-containing gas. To improve the utilization of energy it is proposed to introduce a first gas or gas mixture from below through at least one gas supply tube () into a mixing chamber region () of the reactor (), the gas supply tube () being at least partly surrounded by a stationary annular fluidized bed () which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed () are adjusted such that the Particle-Froude-Numbers in the gas supply tube () are between 1 and 100, in the annular fluidized bed () between 0.02 and 2 and in the 25 mixing chamber () between 0.3 and 30.

Method and plant for producing low-temperature coke

A method for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of about 630&#xb0; C. in a fluidized-bed reactor (). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below through a supply tube () into a mixing chamber () of the reactor (), the gas supply tube () being at least partly surrounded by a stationary annular fluidized bed () which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bet () are adjusted such that the Particle-Froude-Numbers in the gas supply tube () are between 1 and 100, in the annular fluidized bed () between 0.02 and 2, and in the mixing chamber () between 0.3 and 30.

The present invention relates to a method and a plant for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of 700 to 1150&#xb0; C. in a fluidized bed reactor (). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below through at least one gas supply tube () into a mixing chamber region () of the reactor (), the gas supply tube () being at least partly surrounded by a stationary annular fluidized bed () which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed () are adjusted such that the Particle-Froude-Numbers in the gas supply tube () are between 1 and 100, in the annular fluidized bed () between 0.02 and 2, and in the mixing chamber () between 0.3 and 30.

Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed reactor

According to the invention, a fluidizing gas is introduced upwards into the fluidized bed ( ) through a valve grid ( ), said stationary fluidized bed ( ) containing solids with different grain sizes. A supply pipe ( ) is disposed in the area of the fluidized bed, the mouth of said pipe being located above the valve grid ( ) and its outlet ( ) leading outwards from the fluidized bed ( ). Part of the solids located above the valve grid ( ) is blown into the supply pipe by a gas jet ( ) which is directed upwards and fed separately from the fluidizing gas and pneumatically evacuated from the fluidized bed through the supply pipe ( ). Normally, the flow speed of the gas in the supply pipe is at least two times higher than the speed of the fluidizing gas in the fluidized bed.

Process for removing relatively coarse-grained solids from a stationary fluidized bed

Process for producing Iron carbide wherein, in a first stage, Iron ore is reduced to sponge iron using a reducing gas containing at least 90% hydrogen, on a nitrogen-free basis, to produce a sponge iron having a carbon content of less than 1% wt.; then in a second stage the sponge iron is fluidized at a temperature of 500 to 800&deg; C. with a methane-containing fluidizing gas in a fluidized bed reactor wherein the water content of the gas in the reactor is not more than 1.5% wt., to produce a product wherein at least 85% of the iron content is in the form of Fe C.

Method for producing iron carbide from granulated sponge iron

Process for hot briqueting granular sponge iron

This invention describes a method of reprocessing zinc- and iron oxide-containing residual material. Zinc- and iron oxide-containing dust and/or sludge is granulated with water, granules and carbonaceous material are fed to a circulating fluidized bed system, the gas-solids suspension circulated in the circulating fluidized bed system is fed to a second fluidized bed reactor, the solids discharged from the second fluidized bed reactor are recycled to the reactor of the circulating fluidized bed system, 50 to 75% by volume of the oxygen required to gasify the carbonaceous material are fed as fluidizing gas to the reactor of the circulating fluidized bed system and 25 to 50% by volume of said required oxygen are fed as a fluidizing gas and secondary gas to the second fluidized bed reactor, iron oxide-containing material is discharged from the reactor of the circulating fluidized bed system and zinc-containing material is discharged with the exhaust gas from the circulating fluidized bed system.

Growing community of inventors

Kronberg-Schönberg, Germany

Peter Weber