KR20030017147A - Apparatus for manufacturing the sintered ore - Google Patents

Abstract

PURPOSE: An apparatus for manufacturing sintered ore is provided to improve quality of sintered ore and productivity by forming air holes for guiding flow of air coercively, supplementing evaporated water by ejecting steam into the air holes, and flattening the upper layer part of iron ore raw material that is roughened. CONSTITUTION: In an apparatus for manufacturing sintered ore by sintering the blended raw materials by passing a sintering car(5) into which blended raw materials are charged through an ignition furnace, wherein the blended raw materials are discharged from a surge hopper in a certain amount by a drum feeder(4), the apparatus for manufacturing sintered ore comprises a ventilation unit for forming a plural holes(10-3) with spaced apart from each other in a certain distance on the upper layer part of the blended raw materials that are discharged from the surge hopper by the drum feeder and charged into the sintering car; a steam ejection unit for ejecting steam onto the upper layer part of the blended raw materials passing through the ventilation unit; and a surface hardening unit for hardening the upper layer part of the blended raw materials passing through the steam ejection unit, wherein the ventilation unit is a rotatable drum shaped cylinder body(11) on the surface of which a plural protrusions(11-1) are formed, the surface hardening unit is a rotatable drum shaped cylinder body(12), moisture gauges(9) are installed in front of the ignition furnace to measure humidity at the upper layer part of the blended raw materials, a preheating means for preheating the blended raw materials charged into the sintering car before the sintering car is entered into the ignition furnace is installed on the upper part of the sintering car, and the preheating means comprises a steam jacket(8) in which a steam flow path is formed.

Description

Apparatus for manufacturing the sintered ore}

The present invention relates to an apparatus for producing a sintered ore, and more particularly, in order to prevent air permeability deterioration due to high-rise operation, to form an air hole forcing the flow of air and to inject steam into the air hole. By replenishing the water evaporated from the upper part of the raw material and flattening the upper part of the roughly changed iron ore raw material, it solves the deterioration of breathability, minimizes the poor ignition caused by water evaporation, and evenly shape the surface of the charged raw material evenly, thereby improving the quality and productivity of the sintered ore. A sintered ore manufacturing apparatus for planning.

In general, the sintering operation is quantitatively cut out the iron ore raw material of about 5mm or less from the iron ore storage tank (1) and the powdered coke (heat coke) from the iron ore storage tank (1), and then mixed by adding a constant moisture in the mixing drum (2a) In the granulator 2b, the blended raw materials are assembled.

Then, the assembled raw material is temporarily stored in the surge hopper (3) and then cut out in a predetermined amount by the drum feeder (6) and charged in the sintering cart (5). When the sinter truck 5 passes through the ignition furnace 4 and the powdered coke as a heat source is ignited, the sinter truck 5 proceeds to an effective image distance, and the powder coke is combusted through chemical reactions such as melting and diffusion bonding. Agglomeration of the spectroscopy takes place. These blocky sintered ores are cooled, sorted and crushed and then classified into predetermined sizes and supplied to the blast furnace plant.

Referring to FIG. 2, in which a conventional sintering apparatus is shown, the compounding material stored in the surge hopper 3 is cut out in a predetermined amount by the rotation of the drum feeder 6. At this time, the compounding material to be cut out is charged into the sinter bogie 5 while flowing down the inclined surface of the deflector plate 7 of the charging equipment, and when the sinter bogie 5 passes through the ignition furnace 4 of 1200 ° C or more. While the upper part of the compound material is ignited and the sintering cart advances to the effective image distance, the flame of the upper part of the compound material proceeds to the lower layer by the forced suction method, and the compound material is fired to produce the sintered ore. However, such a conventional sintered ore operation has the following problems.

First: The thickening of the blended raw material layer during operation after high-rise of the blended raw material is poor breathability in the blended raw material layer is a slow firing rate, which provides a cause for reducing the sintered ore productivity.

Second: While the sintered trolley (5) loaded with the blended raw material proceeds to the ignition furnace (4), the moisture on the surface of the charged raw material layer is evaporated by the ignition furnace heat and air temperature, and the upper part of the surface layer is dried up to about 100 mm. Therefore, the ignition does not occur in the ignition furnace, and as a result, there is a problem that the quality of the sintered ore is greatly deteriorated by the decrease in surface strength.

Third: In the sintering process due to the increase of the microlayer in the blended raw material layer, the bed upper part of the sintered trolley is cracked due to the decrease of the wet zone, so the air flow is uneven and the concentration is led to the crack part. There is a problem that causes.

The present invention has been made in order to solve the conventional problems as described above, by forming a plurality of air holes at a predetermined interval in the upper layer of the blended raw material before the sintered truck with the blended raw material extracted from the surge hopper enters the ignition furnace Sintered ore productivity by securing the air permeability of the blended raw material, by forcibly steaming the air hole to supplement the insufficient water in the upper layer of the blended raw material, and evenly induce the rough surface changed during the steam spraying process and to maintain the supplemented moisture And it is an object to provide a sintered ore manufacturing apparatus that can improve the quality.

1 is a view showing a conventional sintering process as a whole.

Figure 2 is a view showing a conventional sintered ore manufacturing apparatus.

3 is a view showing a sintered ore manufacturing apparatus according to the present invention.

Figure 4 is a view showing the configuration of a sintered ore manufacturing apparatus according to the present invention.

5 is a view showing a configuration of a steam jacket of the sintered ore manufacturing apparatus according to the present invention.

Figure 6a is a longitudinal sectional view showing a surface compaction apparatus of the sintered ore manufacturing apparatus according to the present invention, Figure 6b is a cross-sectional view of the surface compaction apparatus.

Figure 7a is a longitudinal sectional view showing a ventilator of the sintered ore manufacturing apparatus according to the present invention, Figure 7b is a cross-sectional view of the ventilator.

Figure 8a is a view showing the air flow path to the iron ore raw material loaded in the sintering cart according to the present invention, Figure 8b is a view showing the steam injection state of the steam injection device, Figure 8c is a view showing the operating state of the surface compaction device.

9 is a working view of the steam spraying device of the sintered ore manufacturing apparatus according to the present invention.

10 is a table comparing the air permeability before and after the operation of the ventilator of the sintered ore manufacturing apparatus according to the present invention.

11 is a table comparing the measured water values before and after the operation of the steam spraying device of the sintered ore manufacturing apparatus according to the present invention.

12 is a table comparing particle sizes of upper layers of iron ore raw materials before and after operation of the sintered ore manufacturing apparatus according to the present invention.

<Description of Symbols for Major Parts of Drawings>

8: steam jacket

9: moisture meter

10: steam supply pipe

10-1: injection nozzle

10-3: air hole

10-4: Control Valve

11: first cylinder

11-1: projection

12: second cylinder

In order to achieve the above object, according to the present invention, the apparatus for producing a sintered ore by sintering the blended raw material by passing the sintered bogie loaded with the blended raw material cut out in a predetermined amount from the surge hopper by a drum feeder through an ignition furnace A ventilator for forming a plurality of holes at predetermined intervals in an upper layer portion of the blended raw material cut out by the drum feeder and charged into the sintered trolley, and for injecting steam into an upper layer of the blended raw material passed through the ventilator And a surface compaction apparatus for compacting an upper layer portion of the blended raw material that has passed through the steam spraying device and the steam spraying device.

Hereinafter, an apparatus for manufacturing a sintered ore according to the present invention will be described with reference to FIGS. 3 to 12, and the conventional configuration will be described with reference to FIGS. 1 and 2.

The blended raw material mixed and assembled with the moisture added to the spectroscopic iron ore raw material supplied from the iron ore storage tank 1 is stored in the surge hopper 3. The compounding raw material cut out by the drum feeder 4 installed at the lower end of the surge hopper 3 is charged into the sintering cart 5 along the inclined surface of the deflector plate 7. At this time, along the advancing direction of the sintered trolley 5, at the rear of the deflector plate 7 is provided a ventilator for forming air holes 10-3 in the upper layer of the compounding material charged in the sintered trolley 5. do. The ventilating device has a rotatable drum-shaped first cylindrical body 11 formed with a plurality of projections 11-1 spaced apart at predetermined intervals on a surface thereof.

The first cylindrical body 11 is arranged in the transverse direction on the upper layer of the blended raw material and rotated by the operation of a drive motor (not shown), and at the same time, the plurality of air holes are formed in the upper layer of the blended material by the projections 11-1. (10-3) is formed in a state spaced apart by a predetermined interval.

At the rear of the ventilator, a steam spraying device is provided for injecting steam into the upper layer of the blended material in which the air holes 10-3 are formed. The steam injection device includes a steam supply pipe 10 on which a plurality of injection nozzles 10-1 are mounted. A control valve 10-4 for controlling the inflow amount of steam is installed at a steam inlet of the steam supply pipe 10 through which steam is introduced from a steam supply means not shown. Therefore, the steam flowing into the steam supply pipe 10 from the steam supply means via the control valve 10-4 is injected to the upper layer of the blended raw material through the injection nozzle (10-1).

Then, the rear surface of the steam spraying device is provided with a surface compacting device for flattening the upper layer portion of the blended raw material. The surface compaction apparatus has a drum-shaped second cylindrical body 12 which is rotatable by driving a rotating motor (not shown). The second cylindrical body 12 is flattened while rotating by the operation of the rotary motor in a state in which the second cylindrical body 12 is disposed in the transverse direction so as to be in line contact or surface contact on the upper layer part of the blended raw material.

On the other hand, as shown in Figure 5, in front of the ignition furnace (4) steam jacket (STEAM JACKET) (8) covering the upper layer of the compound material charged in the sinter bogie (5) on the top of the sinter bogie (5) It is installed to be located. And, the upper surface of the steam jacket 8 is provided with a pipe for forming the flow path of the steam or to provide the flow path. That is, the steam supplied from the steam supply means not shown is introduced into the inlet end 13 of the pipe and then flows along the flow path and is discharged to the outside through the outlet end 13-1 of the pipe. At this time, the outer side of the steam jacket (8) is made of a thick iron plate of about 10t to prevent heat dissipation, the inner side is made of a thin plate of about 5t to dissipate heat, the side is made of a general iron plate have.

The first cylindrical body 11 of the ventilation device described above is installed inside the steam jacket 8, that is, inside the preheating part preheated by the steam supplied from the steam supply means. On the surface of the first cylindrical body 11, the projections 11-1 for forming the air holes 10-3 in the upper layer of the iron ore raw material are spaced apart at predetermined intervals, for example 100 mm intervals, and are provided in a zigzag manner. On the other hand, the projection 11-1 is made of conical steel having a length of about 150mm.

The first cylindrical body 11 is installed in the width direction of the sintered trolley 5 in a state supported by the bearing 11-3 so that both ends thereof can rotate smoothly. By the operation of a drive motor (not shown), the first cylindrical body 11 forms an air hole 10-3 in the upper layer portion of the blended raw material while rotating in the direction opposite to the traveling direction of the sintered trolley 5.

The moisture meter 9 for detecting the amount of evaporation of water in the upper layer of the premixed raw material preheated inside the steam jacket 8 by the heat diffused from the steam flowing along the pipe is located in front of the ignition furnace. It is installed in). Preferably, three moisture meters 9 are inserted into the steam jacket 8 along the width direction of the sintered trolley 5 at regular intervals. By comparing and calculating the amount of evaporation of water measured by the water meter (9), the control valve (10-4) is connected in sequence by the deviation value, and continuously controlling the steam injection amount through the air nozzle (10-3) through the air hole (10-3) To spray steam.

The surface compaction apparatus for compacting the upper layer of the compounding material roughened in the spraying process described above is provided between the first cylindrical body 11 and the moisture meter 9 of the ventilator. The surface compaction apparatus includes a drum-shaped second cylindrical body 12. At this time, the second cylindrical body 12 is a pipe of about 10t, the central shaft 12-4 is made of a round bar of about 30mm, both ends thereof supported by the bearing 12-2 It is axially coupled to the outer pipe. In addition, the second cylindrical body 12 is preferably about 5600 mm in length and is manufactured so that its length can be adjusted according to the layer thickness of the iron ore raw material. The second cylindrical body 12 is rotated at a high speed in the reverse direction to the sintering machine traveling direction by the operation of a rotating motor (not shown), wherein the rotational speed is about 180 rpm / min.

Hereinafter, the operation of the sintered ore manufacturing apparatus according to the present invention.

First, the ventilation device of the sintered ore manufacturing apparatus according to the present invention, in order to prevent the air permeability deterioration according to the charging height of the blended raw materials in the sintering operation after high-rise before the sintering cart 5 enters the ignition furnace 4 in advance, The first cylindrical body 11 is rotated by the operation of a driving motor (not shown) together with the movement of the sintering bogie in the upper portion of the bogie 5, and the air hole having a depth of about 100 mm in the upper layer portion of the blended raw material 10-. 3) form.

In general, the air flow passage 11-2 formed in the charging layer of the iron ore raw material by suctioning air from below the sintering cart 5 becomes narrower as it is closer to the upper layer of the blended raw material as shown in FIG. 8A. 5) Deterioration of air permeability of the blended raw material layer. This deterioration in breathability is prevented by forming air holes 10-3 in the upper layer portion of the blended raw material. That is, by forming the air hole 10-3 in the upper layer of the blended raw material layer through the projection 11-1 of the ventilator, the air flow path 11-2 formed in the blended raw material layer is extended to the upper layer to blend the blended raw material layer. Increases the breathability.

As a result, as shown in the table of Figure 10, according to the conventional embodiment formed by the wind box (not shown) of # 1 ~ # 7 until the sintered trolley loaded with the compounding material enters the ignition furnace (4) The distribution of air permeability in the blended raw material layer is extremely low, but the air permeability increases after passing through the ignition furnace and surface ignition. However, it can be seen that the air permeability formed in the blended raw material layer from the wind box of # 1 increases rapidly by operating the ventilator according to the present invention and forming the air holes 10-3 in the upper layer of the blended raw material layer.

The steam injection unit injects steam into the air hole 10-3 formed in the upper layer of the blended material by the projection 11-1 of the ventilator through the injection nozzle 10-1 (Fig. 8B in Fig. 8B). 2). At this time, the injection amount of steam injected through the injection nozzle 10-1 is measured by the injection system 9 as shown in the table of FIG. The operator of the sintered ore manufacturing apparatus calculates the optimum moisture value through the cab monitor and operates the control valve 10-4 so that a constant amount of steam is always injected.

That is, as the sintered truck 5 approaches the ignition furnace 4, the amount of evaporation of water according to the temperature rise in the upper part of the blended raw material is measured by three moisture meters 9 installed inside the preheating part of the steam jacket 8. do. Then, the amount of steam injected through the injection nozzle 10-1 is continuously controlled by the control valve 10-4 while comparing the measured value and the reference moisture value, thereby correcting the water vaporization in the upper part of the blended raw material. . As a result, the upper layer is preheated in a state where water evaporated is replenished.

For example, since the reference moisture value in the upper portion of the blended material is typically about 6.5 to 7.5%, when the reference moisture value is set to about 7% at the input unit, the measured moisture value measured by the moisture meter 9 is the reference moisture value. And the deviation is calculated by the calculation unit, and the control unit continuously controls the control valve 10-4 so that the steam corresponding to the deviation is injected through the injection nozzle 10-1. The moisture value may be changed depending on the properties of the blended raw materials charged in the sintering cart 5.

The table shown in FIG. 11 is a measurement data of the change in moisture according to the amount of steam injection in the upper layer from the surface layer portion of the blended material to a depth of about 100 mm when steam is injected into the air hole 10-3 formed by the ventilator. As the sintered trolley approaches the ignition furnace, the moisture value increases.

Since the surface in the upper portion of the blended material is roughened by the operation of the aeration device and the steam spraying device as described above, the surface compaction apparatus is operated to flatten it and keep the steam injected in the upper layer for a long time. At this time, the second cylindrical body 12 of the surface compaction device is positioned about 10 mm lower than the surface of the compounding material charged in the sintering cart 5 and rotates in the opposite direction to the advancing direction of the sintering machine. The infiltrated steam 10-2 is retained in the upper layer of the compounding material (see reference numeral 12-1 in FIG. 8C).

By maintaining steam at the upper portion of the blended raw material at all times to maintain a constant wet zone of the blended raw material layer to prevent the wet evaporation in the upper layer of the blended raw material layer during the sintering process and to form the surface of the raw material evenly As shown in Figure 1, the particle size of the blended raw material is increased to prevent deterioration of the sintered ore.

On the other hand, when the sintering apparatus is activated as described above, the surface compaction apparatus is activated and the ventilator is operated. However, when the surface compaction apparatus is not activated, the ventilator is also stopped. Therefore, once the sintering apparatus is started, the proper moisture value for the upper part of the blended raw material layer is input during normal operation, and the heat is emitted from the preheating part of the steam jacket 8 when the blended raw material passes through the steam jacket 8. It can compensate for water evaporation.

According to the present invention, before the sintered trolley loaded with the blended raw material enters the ignition furnace, an air vent is formed in the upper layer of the blended raw material by the ventilator, and steam is stored in the formed air vent to supplement the evaporated water during the sintering process. By uniformly roughening the surface of the roughened upper part, the air permeability is secured regardless of the thickness of the blended raw material layer during high-rise operation, thereby improving the productivity of the sintered ore and preventing the upper part of the blended material layer from drying out, thereby increasing the surface strength. It can improve the quality and prevent surface defects by eliminating surface cracks due to the formation of micro-layers.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. It should be recognized.

Claims (5)

An apparatus for producing a sintered ore by sintering the blended raw material by passing a sintered truck loaded with a blended raw material cut out in a predetermined amount from the surge hopper by a drum feeder through an ignition furnace, A venting device for forming a plurality of holes at predetermined intervals in an upper layer portion of the blended raw material cut out by the drum feeder and charged into the sintered trolley; Steam injection device for injecting steam to the upper layer of the blended raw material passed through the ventilator; Sintered ore manufacturing apparatus, characterized in that it further comprises a surface compaction device for compacting the upper layer portion of the blended raw material passed through the steam injection value. The method of claim 1, The ventilation device is a sintered ore manufacturing apparatus, characterized in that the rotatable drum-shaped cylindrical body is formed with a plurality of projections on the surface. The method of claim 1, The surface compaction apparatus is a sintered ore manufacturing apparatus, characterized in that the rotatable drum-shaped cylinder. The method of claim 1, Sintered ore manufacturing apparatus, characterized in that the front of the ignition furnace is provided with a moisture meter for measuring the humidity in the upper portion of the blended raw material. The method of claim 1, Preheating means for preheating the compounding material charged to the sintering bogie before the sintering bogie enters the sintering furnace is provided on the top of the sintering bogie, and the preheating means is a steam having a flow path of steam formed therein. Sintered ore manufacturing apparatus comprising a jacket.