JPH025352Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sintered ore supply device to a sintered ore cooler used in a steel manufacturing process.

Generally, the amount of sintered ore discharged from a sintering machine used in the steel manufacturing process is uneven, and in the case of conventional equipment, the layer thickness level of sintered ore 22 on the cooler trough 17 is not uniform, as shown in FIG. It fluctuated in sync with the sinter discharge pattern from the sintering machine. In other words, crusher 5
Since the sintered ore 22 was directly dropped from the sintered ore cooler to the ore feed chute 21, the cooler trough 1
The layer thickness of the sintered ore 22 on the sintered ore 7 was non-uniform. Further, the layer thickness level distribution in the width direction of the cooler trough 17 is determined by the shape of the ore discharge chute of the crusher, and it has been difficult to control this layer thickness level distribution. As described above, since the layer thickness of the sintered ore 22 on the cooler trough 17 is non-uniform, the thin layer portions are easily cooled, but the thick layer portions are difficult to cool and sufficient heat recovery cannot be achieved. For this reason, the high-temperature sintered ore 22 is not completely cooled and is discharged from the cooler trough 17 while still at a high temperature and is stacked on the subsequent belt conveyor 7, resulting in belt burnout and the like.

This invention was proposed to eliminate the above-mentioned drawbacks, and aims to increase the amount of waste heat recovered by the cooler and improve cooling efficiency by uniformizing the feeding of high-temperature sintered ore to the cooler trough. The purpose of the present invention is to provide a sintered ore supply device to a sintered ore cooler.

Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

First, the flow of the sintering operation to which this embodiment is applied will be explained. The flow of this sintering operation is the first
As shown in the figure, a bedding hopper 1, an ore feed hopper 2, a sintering machine 3, an ignition furnace 4, a crusher 5, a sintered ore cooler 6, a belt conveyor 7 for conveying sintered ore, and a bedding ore use It consists of an ore feeder 8 and an ore feeder 9 for sintering raw materials. Bed ore 10 and sintering raw material 11 are fed onto the sintering machine 3 by the bedding ore feeder 8 and the sintering raw material feeder 9, and are converted into coke in the sintering raw material 11 in the ignition furnace 4. It is ignited and sintered ore is produced. The sintered raw material 11 on the sintering machine 3 is sintered as it moves, reaches the ore discharge section 3a of the sintering machine 3, is inserted into the crusher 5, and is crushed to a suitable particle size. The crushed sintered ore is cooled from a temperature of about 600°C to about 150°C by a sintered ore cooler 6 so as not to cause problems during subsequent transportation.

Furthermore, recently, a sintered ore cooler 6 with exhaust heat recovery equipment added thereto has been proposed and used in order to recover the sensible heat of the sintered ore. Steam or electricity is generated by recovering this waste heat. The flow of exhaust heat recovery by steam recovery in the sintered ore cooler 6 is shown in FIG. This system includes a suction hood 12, a push-in hood 13, a boiler 14, and a push-in fan 1.
5, ducts 16a, 16b, and a cooler trough 17. The sintered ore 22 at about 600° C. crushed by the crusher 5 is stacked in a cooler trough 17. The bottom plate of the cooler trough 17 has a lattice shape and has a structure that allows ventilation. Cold air is forced into the sintered ore 22 on the cooler trough 17 from the bottom plate portion, and the high temperature sintered ore 22 is cooled down. The cold air that passes through the cooler trough 17 reaches a high temperature of approximately 300°C. A device for guiding this high-temperature gas to the boiler 14 through the duct 16a and recovering steam is a cooler exhaust heat recovery device.

Next, the characteristic parts of this embodiment will be explained.
As shown in FIGS. 4 and 5, this embodiment includes an ore feed level adjustment gate 20 for layer thickness adjustment disposed in an ore feed section of a sintered ore supply device, and an ore feed level adjustment gate 20 for adjusting the layer thickness. a detection level meter 18 for detecting the amount of sintered ore 22 stored in the chute 21; 19, and the detection level meter 18,1
9, the control device controls the moving speed of the cooler trough 17 of the sintered ore cooler. This ore feeding level adjustment gate 20 is formed by a plurality of holes 20 penetrating through the supporting parts 20a, 20a.
It is mounted so that it can be adjusted up and down by screwing bolts into b and 20b. These holes 20b, 20
It goes without saying that b... may be adjusted vertically by forming elongated holes whose longitudinal direction is in the vertical direction and fastening them with screws. By dividing the adjustment gate 20 in the width direction, adjustment in the width direction is also possible. Further, although the adjustment gate 20 is adjusted to move up and down by fastening bolts, it is of course possible to use a cylinder or the like. Feed chute 2 for feeding high temperature sintered ore 22
Required amount is stored in the storage part in 1, cooler trough 17
The sintered ore 22 is pulled out by the movement of the sintered ore, and the level of the sintered ore 22 on the cooler trough 17 is adjusted by the adjustment gate 20. The emergency upper limit level meter 18 is located at the ore feed chute 21 of the cooler trough 17.
This is to detect the upper limit of the level within. The common level meter 19 and the lower end of the adjustment gate 20 are arranged so that the levels thereof are the same. Emergency upper limit level meter 1
8 is placed higher than the commonly used level meter 19 by a required degree. These emergency upper limit level meter 18 and regular level meter 19 are connected to a drive source (not shown) of the cooler trough 17 via a control device (not shown).
The level of the sintered ore 22 in the ore feed chute 21 is determined by two level meters installed in the ore feed chute 21,
It is adjusted by an emergency upper limit level meter 18 and a regular level meter 19. The regular level meter 19 is used to confirm that the sintered ore 22 is at a predetermined level at all times. Since the sintered ore 22 is accumulated, the sintered ore 22 is always in contact with the regular level meter 19, and thereby the level of the sintered ore 22 on the cooler trough 17 is made uniform by the adjustment gate 20. . When the sintered ore 22 does not come into contact with the regular level meter 19, the moving speed of the cooler trough 17 is lowered by the control device to accumulate the sintered ore 22 upstream of the adjustment gate 20. On the other hand, if too much sintered ore 22 accumulates and touches the emergency upper limit level 18 meter, the moving speed of the cooler trough 17 is increased and a large amount is cut out. Therefore, the sintered ore 22 can be stored in the ore feed chute 21 of the cooler trough 17 at all times, and the thickness of the sintered ore layer in the cooler trough 17 can be easily controlled. In addition,
In this embodiment, the level meter measures the temperature of the cooler trough 1.
Although the moving speed of the adjustment gate 7 is adjusted, it goes without saying that the opening degree of the adjustment gate 20 may also be adjusted.

The embodiment shown in FIG. 6 shows another embodiment in which the emergency upper limit level meter 18 is disposed in a different position.

As explained above, in this invention, the thickness of the sintered ore layer on the cooler trough can be made uniform by the cooler trough ore supply level adjustment gate, and the amount of sintered ore stored in the ore supply chute to the cooler trough can also be adjusted, so that the sintered ore layer is not sintered more than necessary. Condensation does not accumulate. As a result, the high-temperature sintered ore on the cooler trough can be reliably cooled smoothly and uniformly, resulting in an increase in the amount of waste heat recovery and a prolongation of the life of the subsequent belt conveyor by preventing damage to it.

[Brief explanation of the drawing]

Fig. 1 is a sintering flow chart, Fig. 2 is an exhaust heat recovery flow chart, Fig. 3 is an explanatory diagram of the layer thickness of sintered ore on a cooler trough by a conventional sintered ore supply device,
FIG. 4 is a block diagram of one embodiment of the present invention, FIG. 5 is a sectional view taken along line A--A in FIG. 4, and FIG. 6 is a block diagram of another embodiment of the present invention. 17...cooler trough, 18...emergency upper limit level meter, 19...regular level meter, 20...adjustment gate, 21...ore feed chute, 22...sintered ore.

Claims (1)

[Scope of utility model registration request] An ore feed level adjustment gate for layer thickness adjustment arranged in an ore feeder that supplies sintered ore to a sintered ore cooler, and a storage area in which the sinter is stored in an ore feeder chute of the ore feeder. a detection level meter for detecting the stored amount of the sintered ore, and a control device for controlling the moving speed of the cooler trough of the sintered ore cooler based on the signal from the detection level meter; 1. A sintered ore supply device to a sintered ore cooler, comprising an opening adjustment device that adjusts the opening of an adjustment gate.