KR20030068466A - Method and device for operating composite structure with at least two reactors of chemical-physical process technology, in particular of metallurgy technology - Google Patents

Abstract

The present invention comprises two reactors 1, 2 of chemical-physical processing technology and is intended for the treatment of finely divided feed materials, in particular feed materials containing metals, preferably for producing metals and / or metal starting materials. Apparatus and method, wherein a first reactor, in particular a first fluidized bed reactor, has a feed pipe for a first working gas and a tube for connecting the first reactor to a second reactor, in particular a second fluidized bed reactor. ) Is provided, at least a portion of the top gas discharged from the first reactor (1) through the tube (7) can be introduced into the second reactor (2), the first reactor (1) The excess gas discharge pipe 9 is branched from the pipe 7 for introducing the gas from the first reactor 1 into the second reactor 2, and the amount of the gas from the first gas is divided after being discharged from the first reactor 1. Can be. The first portion of the top gas amount can be introduced into the second reactor 2 as the second working gas, and the second portion of the top gas amount can be discharged through the excess gas discharge tube 9 as excess gas. At this time, the adjusting device 8 is installed in the pipe 7 and / or the excess gas discharge pipe 9 for supplying the second working gas to the second reactor 2, whereby the amount of the top gas is reduced. The division of the top gas volume can be adjusted and / or controlled in connection with the adjustment of the temperature in the second predetermined fluidized bed reactor 2 after exiting from the first reactor 1.

Description

TECHNICAL-PHYSICAL PROCESS TECHNOLOGY, IN PARTICULAR OF METALLURGY TECHNOLOGY}

FIELD OF THE INVENTION The present invention relates to a method for manipulating a conjugate in which two or more reactors are combined in chemical-physical processing techniques, in particular in metallurgy, wherein the first working gas for the formation of the first fluidized bed comprises a first reactor, in particular Supplied to a first fluidized bed reactor, and the first top gas is discharged from the first reactor, the first top gas being at least partially as a second working gas in a second reactor, in particular a second fluidized bed reactor, e.g. Supplied for formation. The invention also relates to an apparatus for the treatment of feed materials in the form of fines, in particular feed materials containing metals.

In the prior art, associative operations using multiple fluidized bed reactors of continuous operation are known. Document AT 403 381 B describes the passage of part of the top gas from the first fluidized bed reactor next to the second fluidized bed reactor which is continuously driven.

In the fluidized-bed reduction process according to the prior art, a problem often arises that the fine ore iron is not sufficiently reduced. For the purpose of technical development, it has been observed whether magnetite can be produced when iron ore is reduced in a preheating or preliminary reduction reactor. Magnetite has a very dense structure, thus preventing further reduction. In order to prevent this magnetite formation, for example, the gas atmosphere in the fluidized bed can be adjusted. In practice, however, fluctuations in the gas atmosphere are very limited.

It is an object of the present invention to further improve the method according to the preamble of claim 1 and the apparatus according to the preamble of claim 4, thereby enabling a highly effective and economical treatment of the feed material, and the combination of a plurality of reactors run continuously. It is a very economical operation.

1 illustrates an embodiment of an apparatus and method for treating a feed material in the form of fines containing metals.

※ Explanation of symbols about main parts of drawing ※

1: first fluid reactor 2: second fluid reactor

3, 4, 5, 6, 7, 9, 10, 11: pipe

8: adjusting device 12: armature

This object is achieved according to the invention by a method according to the features of claim 1 and by an apparatus according to the features of claim 4.

The present invention describes a method for adjusting the temperature in a binder consisting of a plurality of reactors in a reactor, such as a preheating reactor, a pre-reactor or a pre-reduction reactor, a chemical-physical processing technique, through a particularly controlled partial branching of the reaction gas. have.

By controlling the amount of gas by means of a second reactor, such as a preheating reactor, a pre-reactor or a pre-reduction reactor, the temperature profile controlled in the reactor, in particular the preheating reactor, the pre-reactor or the pre-reduction reactor, is preferably influenced.

Thus, for example in the case of iron ore reduction in a preheating reactor or a pre-reduction reactor, the temperature can be adjusted to less than 500 ° C. or less than 400 ° C., and the magnetite may be reduced due to the reaction limitation at this temperature, or the thermodynamic limitation in the corresponding gas composition. Not generated.

According to one preferred embodiment of the process according to the invention, the feed material is treated with a working gas in the reactor, in particular a heat treatment and / or at least a part of the reducing treatment, the feed material being first fed into a second reactor The feed material treated therein, in particular preheated and treated, is withdrawn from the second reactor and sent to the first reactor for further treatment, in particular at least partial reduction.

According to one preferred embodiment of the method according to the invention after the top gas volume has been withdrawn from the first reactor, the division of the top gas volume is adjusted and / or for the adjustment of the temperature in the second preset reactor, in particular for the temperature of the fluid. Controlled.

According to one preferred embodiment of the device according to the invention there is provided a tube for the transport of feed material between the second reactor and the first reactor.

According to another preferred embodiment a second reactor designed for example as a preheating reactor has a feed tube for feed material. The feed material is treated, in particular preheated, in a second reactor according to the following specific embodiment.

According to another embodiment, a second reactor, for example designed as a preheating reactor, further has a discharge tube for treated, in particular preheated feed material. The treated, in particular preheated, feed material is fed to a first reactor designed for further processing, such as at least partial reduction, for example as a reduction reactor, via a feed material transport tube according to a particular embodiment of the invention.

The subject matter of the present invention is described below with reference to the schematic and non-limiting drawings in accordance with one preferred embodiment.

Two fluidized bed reactors 1 and 2 are shown in FIG. 1. The first fluidized bed reactor 1 is supplied with a working gas, for example a reducing gas, via a tube 3. The fluidized bed reactor 1 is subsequently fed with fine, especially pretreated ore through the feed pipe 4, which is discharged through the pipe 5 again after appropriate treatment, in particular reduction. The working gas is withdrawn through the tube 6 at the upper end of the fluidized bed reactor 1, and a portion of the working gas is diverted to the second fluidized bed reactor 1 and the other part for branching of the first fluidized bed reactor 2. The excess gas discharge pipe 9 is supplied. The excess gas discharge pipe 9 preferably has a controllable armature 8 according to one preferred embodiment, whereby the gas flow is regulated. The fluidized bed reactor 2 is supplied with a feed material in the form of fine powder via a tube 10, which is appropriately treated, in particular preheated and / or pre-reduced, in the fluidized bed reactor 2 to supply the fluidized bed reactor 1. Supplied to. The working gas is withdrawn from the fluidized bed reactor 2 via a tube 11 equipped with an armature 12.

The present invention further improves the method according to the preamble of claim 1 and the apparatus according to the preamble of claim 4, as well as the highly efficient and economical treatment of the feed material, as well as the very economical operation of the combination consisting of a plurality of reactors running continuously. This becomes possible.

Claims (5)

A method for manipulating a combination of two or more reactors in chemical-physical processing techniques, in particular metallurgy, wherein a first working gas is supplied to a first reactor, in particular a first fluidized bed reactor, for the formation of a first fluidized bed, In a method, a first top gas is discharged from a first reactor, and at least a portion of the first top gas is fed to a second reactor, in particular a second fluid bed reactor, as a second working gas, for example for the formation of a second fluid bed. The first top gas amount discharged from the first reactor is divided to adjust the temperature in the second reactor, the first portion of the top gas amount is introduced into the second reactor as the second working gas, and the first The two parts are discharged as excess gas, in particular passing next to the second reactor. The process according to claim 1, wherein the feed material is treated with a working gas in the reactor, in particular for producing a metal and / or metal starting material. , In particular heat treatment and / or at least a part of the reduction is carried out, the feed material being first fed into a second reactor where it is treated, in particular preheated, the treated feed material being discharged from the second reactor for further treatment, in particular Sent to the first reactor for at least some reduction. 3. The method according to claim 1 or 2, wherein after the top gas amount is discharged from the first reactor, the division of the top gas amount is adjusted and / or controlled for adjusting the temperature in the second preset reactor, in particular for adjusting the temperature of the fluid. Characterized in that the method. To produce a device, preferably a metal and / or a metal starting material, comprising two reactors 1, 2 in a chemical-physical processing technique, for treating feed materials in the form of fines, in particular metals. As a device, a first reactor, in particular a first fluidized bed reactor, has a feed tube for a first working gas, and a tube 7 is provided for connecting said first reactor to a second reactor, in particular a second fluidized bed reactor, At least a portion of the top gas discharged from the first reactor 1 may be introduced into the second reactor 2 through the pipe 7, and the top gas discharged from the first reactor 1 may be discharged. The excess gas discharge tube 9 is branched from the tube 7 for entering the second reactor 2, wherein the amount of top gas can be divided after being discharged from the first reactor 1, and the top The first portion of the gas amount is the second reaction as the second working gas In the apparatus that can be introduced into the unit (2), and the second portion of the amount of the top gas can be discharged through the excess gas discharge pipe (9) as excess gas, the second working gas to the second reactor (2) Is provided in the tube 7 and / or the excess gas discharge tube 9 for supplying to), whereby the amount of the top gas is discharged from the first reactor 1, 2 A device characterized in that the division of the top gas volume can be adjusted and / or controlled in connection with the adjustment of the temperature in the fluidized bed reactor (2). 5. A tube 4 is provided for the transport of feed material between the second reactor and the first reactor, the second reactor 2 having a feed tube for feed material, wherein the feed material is The treatment, in particular preheating, can be carried out in two reactors 2, the second reactor 2 having a discharge tube for the feed material which is subsequently treated, the treated feed material being subjected to further treatment, in particular at least some reduction. Device which can be supplied to said first reactor (1) via a pipe (4) for the transport of said feed material.