Hot-briquetting installation

Abstract

The invention relates to a hot-briquetting or hot-compacting installation, in particular for directly reduced iron, having at least one first row (1) of presses with one or more first roll presses (2), and having at least one second row (3) of presses with one or more second roll presses (4), having at least one first cooling conveyor (7) beneath the first row (1) of presses, and a second cooling conveyor (8) beneath the second row (3) of presses, and having a plurality of material lines (6), which are assigned in each case to the individual roll presses (2, 4) and via which the briquetted or compacted material exiting from the roll presses (2, 4) is discharged to the cooling conveyors (7, 8). The material lines (6) are provided with one or more diverters (9), which can be adjusted such that the material from the roll presses (2, 4) of the first row (1) of presses and of the second row (3) of presses is discharged optionally in each case to the first cooling conveyor (7) or to the second cooling conveyor (8).

Claims

1. A hot-briquetting or hot-compacting installation for directly reduced iron, the installation comprising: a first row with at least one roller press supply means for feeding the directly reduced iron to the press for compaction thereby into briquettes; a first cooling conveyor and a second cooling conveyor beneath the row; a material conduit having an upstream end connected to the roller press and receiving briquettes therefrom and having respective first and second downstream ends for delivering the briquettes to the cooling conveyors; and a diverter in the material conduit operable to deliver the material from the roller press to the first cooling conveyor or to the second cooling conveyor; and a second row of at least one roller press, the first cooling conveyor being beneath the first press row and the second cooling conveyor beneath the second press row, the diverter being switchable such that the material can be delivered from the roller press of the first press row and/or from the roller press of the second press row to the first cooling conveyor or to the second cooling conveyor.

2. The installation defined in claim 1, wherein the first press row has a plurality of the roller presses in a straight line, and the second press row has a respective plurality of the roller presses in a straight line.

3. The installation defined in claim 2, wherein each roller press of the first press row is laterally adjacent and paired with a respective roller press of the second press row and each roller press from the first press row on the one hand and the respective paired roller press from the second press row on the other hand are connected to respective upstream ends of the material conduit and therethrough to the diverters.

4. The installation defined in claim 2, wherein more than two roller presses are connected to the diverter.

5. The installation defined claim 1, wherein the cooling conveyors are each designed and adapted to the total capacity of the roller presses such that, during operation, they can each receive and transport the material from all of the presses.

6. A hot-briquetting or hot-compacting installation for directly reduced iron, the installation comprising: a first row with at least one roller press supply means for feeding the directly reduced iron to the press for compaction thereby into briquettes; a first cooling conveyor and a second cooling conveyor beneath the row; a material conduit having an upstream end connected to the roller press and receiving briquettes therefrom and having respective first and second downstream ends for delivering the briquettes to the first and second cooling conveyors; a diverter in the material conduit operable to deliver the material from the roller press to the first cooling conveyor or to the second cooling conveyor; respective screens through which the material conduits pass for separating off fine components beneath the roller presses; and transport means connected to the screens for conveying the fine components to the roller presses, the diverters being beneath the screens.

7. The installation defined in claim 6, wherein two of the roller presses are associated with the transport means.

8. The installation defined in claim 7, wherein the transport means is between the roller presses and/or between the cooling conveyors.

9. The installation defined in claim 6, further comprising: a second row of at least one roller press, the first cooling conveyor being beneath the first press row and the second cooling conveyor beneath the second press row, the diverter being switchable such that the material can be delivered from the roller press of the first press row and/or from the roller press of the second press row to the first cooling conveyor or to the second cooling conveyor.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The invention is described in further detail below with reference to a schematic drawing showing only one embodiment and in which:

(2) FIG. 1 is a simplified top view of an installation according to the invention for hot-briquetting directly reduced iron;

(3) FIG. 2 shows the installation according to FIG. 1 in a simplified view from the direction of arrow A; and

(4) FIG. 3 shows the installation according to FIG. 1 in a simplified view from the direction of arrow B;

(5) FIG. 4 is a simplified view of a modified embodiment of the invention.

SPECIFIC DESCRIPTION OF THE INVENTION

(6) The drawing show a schematically simplified view of an installation for hot-briquetting directly reduced iron. The directly reduced iron is manufactured from pellets and/or lump ore, with the direct reduction being performed using gas. The drawing does not illustrate details of the manufacture of the directly reduced iron. The directly reduced iron is inputted in the direction of arrow X.

(7) The installation for hot-briquetting illustrated in the Drawing has a first row 1 of presses with several first roller presses 2 and a second row 3 of presses with several roller presses 4. The directly reduced iron is inputted in the direction X through supply conduits 5 also referred to as feedlegs. A comparison of FIGS. 2 and 3 shows that a feedleg 5 is provided for each roller press. In this embodiment, the first row of presses 1 has three successively aligned roller presses 2, and the second row of presses 3 also has three successively aligned roller presses 4. The directly reduced iron is pressed into briquettes in the roller presses 2 and 4. The possibility exists for individual briquettes to emerge directly from the roller presses 2 and 4. However, it is common for a string of connected briquettes to initially emerge from the roller presses 2 and 4 and for the briquettes to be separated beneath each of the roller presses by a suitable respective cutter 12. The material (briquettes in the illustrated embodiment) then travels through several material conduits 6 to cooling conveyors 7 and 8 beneath the roller presses 2 and 4. In this embodiment according to FIGS. 1 to 3, the first cooling conveyor 7 is beneath the first row of presses 1, and the second cooling conveyor 8 is beneath the second row of presses 3. According to the invention, the material conduits 6 are equipped with diverters 9. They are embodied and integrated into the material conduits 6 such that the briquettes can be delivered from the first press row 1 optionally to the first cooling conveyor 7 or to the second cooling conveyor 8. Likewise, the briquettes from the second press row 3 can be optionally delivered to the second cooling conveyor 8 or to the first cooling conveyor 7.

(8) During normal operation, the installation is operated such that the material from the roller presses 2 of the first row of presses 1 is delivered to one cooling conveyor, the first cooling conveyor 7, and the material from the roller presses 4 of the second press row 3 is delivered to the other cooling conveyor, the second cooling conveyor 8.

(9) If one of the cooling conveyors 7 and 8 malfunctions, the diverters 9 can be switched, particularly such that all of the material both from the roller presses 2 of the first press row 1 and from the roller presses 4 of the second press row 3 is then delivered to only one cooling conveyor, for example the first cooling conveyor 7 or, alternatively, the second cooling conveyor 8, depending on which conveyor is operational. The installation according to the invention is therefore characterized by a high level of failure safety, since it ensures that, even in case of the failure of one cooling conveyor, the hot material is transported away flawlessly without the need for a system shutdown or emergency disposal.

(10) FIGS. 1 to 3 illustrate an embodiment in which two adjacent roller presses 2 and 4 are associated with a common respective diverter 9. In the illustrated embodiment, the diverter is X-shaped (see FIG. 3). Alternatively, it lies within the scope of the invention for more than two roller presses to be connected to a respective one of the diverters. For instance, two pairs of roller presses and, consequently, a total of four roller presses can be connected to a respective one of the diverters. This embodiment is not shown in the figures.

(11) Moreover, it can be seen in the drawing that respective screens 10 for separating out a fraction of fine components can be beneath the roller presses 2 and 4. This fine fraction can then be conveyed back to the roller presses by transport means 11. The diverters 9 are beneath the screens. As can be seen in FIG. 3, the screens 10 are inserted into the material conduits 6. The material thus travels from a respective roller press 2 or 4 over the separator 12 into an upstream portion of the material conduit 6 and from there onto the screen 10 and then into an intermediate portion of the material conduit 6. This is then followed by the diverter 9 and, in turn, a downstream portion of the material conduit 6. In the illustrated embodiment, the transport means 11 are bucket conveyors. The drawing shows that these bucket conveyors 11 are between the rows of presses 1, 3. Two respective roller presses are associated with a respective common transport means 11, so that each transport means 11 is positioned between two adjacent roller presses.

(12) FIG. 4 shows a modified embodiment of the invention in which the roller presses 2 are alined in only a single press row 1. Two cooling conveyors 7 and 8 are beneath this single press row 1. As in the embodiment according to FIGS. 1 to 3, the material travels from the roller presses 2 via material conduits 6 to the cooling conveyors 7 and 8. Diverters are, in turn, integrated into the material conduit 6, so that the material can be delivered from the roller presses 2 optionally to the first cooling conveyor 7 or to the second cooling conveyor 8. This embodiment, too, is therefore characterized by an increased level of operational reliability since, if one cooling conveyor fails, the material can be picked up by the other cooling conveyor. In this embodiment, the diverters 9 are Y-diverters. Details are not shown.

(13) Moreover, the invention optionally also includes embodiments with more than two rows of presses and/or more than two cooling conveyors. For instance, three (or more) rows of presses having three (or more) cooling conveyors beneath them can be provided. Such an embodiment is not shown in the figures.