KR20010059582A - Apparatus for screening and making the size of the powder coke using in the sintering machine - Google Patents

Abstract

PURPOSE: Apparatus for sorting and screening granularities of coke breeze for sintering are provided to improve productivity and quality, and reduce unit cost by separating coke breeze, sedimentation and anthracite used as a heating source in the sintering process with the air per granularities in advance and intentionally forming granularities by mixing the separated fine coal with an organic binding solution. CONSTITUTION: In an apparatus for sorting granularities for separating coke breeze supplied from the storage vessel for sintering coke breeze into bulk coal and fine coal, the apparatus for sorting and screening granularities of coke breeze for sintering comprises a separating storage vessel which is separated into a first storage vessel (22) for bulk coal and a second storage vessel for fine coal by a partitioning wall, wherein a charging port into which coke breeze of the first storage vessel is charged is formed at the upper part of one side of the first storage vessel; a dispersion plate installed at the lower part of the charging port so that coke breeze fallen after being charged through the charging port is uniformly dispersed; an air blowing means (20) formed at one side of the first storage vessel so as to blow the air so that fine coal in coke breeze fallen after being dispersed from the dispersion plate is flown into the second storage vessel; and a dust collector (24) installed at the upper part of one side of the second storage vessel so as to discharge the air flown in from the air blowing means into the outside.

Description

Apparatus for screening and making the size of the powder coke using in the sintering machine}

The present invention relates to a process for producing powdered coke, a fuel used in the production of sintered ore, and to an equipment and method for optimally selecting, crushing, and preparing powdered coke particles used as a main raw material when producing a powdered iron ore as a semi-melt ore. .

In general, sintered ore is manufactured by mixing and assembling various types of spectroscopy of 10mm or less, subsidiary materials for forming chemical components such as limestone, silica sand, serpentine, and powdered coke, and charging them into a sintering furnace and igniting them in an ignition furnace. It is then suctioned in the downward direction and sintered to sintered ore.

In this process, the spectral ore particles of the fine powder are semi-melted by the heat source generated as the coke particles are burned to become sintered ore.

Conventionally, the coke particle size distribution used in this process is used in a range of 0.125 to 10 mm, and the optimum particle size is 1 to 3 mm in size distribution.

Particle sizes of 1 mm or less in the powdered coke are burned quickly during the sintering process, so the heat retention time is short, so that the spectroscopy around the powdered coke disappears before melting, and thus the sintered stone cannot be completely sintered.

Due to these phenomena, the heat produced by the burning coke prevents the spectral ore from melting completely and becomes easily differentiated, and the structure of the sinter is not dense, and the sintering time is delayed due to the lack of calories and the productivity decreases. There were increasing problems.

The problems of the prior art are listed as follows.

First, the conventional powdered coke sizing equipment is distributed in the particle size distribution of incoming coke to -0.125 ~ 25mm, so even if the particle size is selected beforehand, the powdered coarse particle size distribution of 1mm or less is about 50% and used for sintering operation without additional regeneration treatment. Thus, the powdered coal particles were only a consumable role in the sintering operation.

Second, when the powdered -0.125 ~ 1mm particle size produced in the conventional crushing equipment is used in the sintering operation, the sintering time is long because the heat generated during the sintering process is small and the quality is poor because it cannot be completely melt-bonded. .

Third, in the conventional powdered coke crushing plant, when the screen of the screen for sorting the particle size is blocked, the powdered coke having the powdered coarse particle size of 1 mm or less is introduced into the crusher and crushed to increase the fine content of -0.125mm particle size. On the other hand, screen clogging is worsened as the water content of the powdered coke increases, especially during the rainy season in summer and at low temperatures in winter.

Fourth, the powdered coke of less than 1mm among the particle size of the powdered coke used in the sintering operation is segregated to one side by water sprayed in the process of mixing with the spectroscopy. An imbalance has occurred.

The present invention is to solve the above problems by separating the powdered coke, sedimentation, anthracite and the like used by the heat source in the sintering process by particle size in advance, and the separated powdered coal is intentionally particle size by mixing the organic caking solution The purpose is to produce and use in the production of sintered ore to improve productivity, reduce raw units and improve quality.

According to the present invention, in order to achieve the above object, the particle size sorting device for separating the pulverized coke supplied from the storage tank of sintered coke into pulverized coal and powdered coal is a coal pulverizing agent for storing the pulverized coal and powdered coal to the powdered coke The first storage tank and the second storage tank for coal dust are separated by a separation membrane, and an upper side of the first storage tank is provided with a separate storage tank having a charging port into which the powder coke is charged, and charged and dropped through the charging port. A dispersing plate installed at the lower portion of the charging hole so as to uniformly disperse the powdered coke, and blowing the air so that the powdered coals dispersed and falling from the dispersing plate can be introduced into the second storage tank. Blowing means formed on one side of the first reservoir, and installed on the upper side of one side of the second reservoir is introduced from the blowing means It characterized by consisting of a dust collector to discharge the air to the outside.

In addition, according to one embodiment of the present invention, the particle size sizing apparatus for assembling the powdered coal of the sintered coke has an assembly space where the powdered coal is assembled into recycled coal, and the discharge port through which the assembled coal is discharged is discharged at one end. A mixing feeder formed, a binder supplying means for supplying an organic binder to the assembly space, a mixing means for mixing coal dust and an organic binder in the assembly space to form regenerated coal, and through the discharge port Characterized in that it comprises a drying means for drying and curing the discharged recycled coal.

1 is a view schematically showing a bun coke production apparatus according to an embodiment of the present invention.

FIG. 2 is a view illustrating a dispersion plate of a coke breakout portion according to an embodiment of the present invention. FIG.

3 is a view showing a pseudo particle size manufacturing apparatus for sintering using powdered coal according to an embodiment of the present invention.

4 is a view showing a particle size cutter of the mixed feeder according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10 screw feeder

11: temporary storage

12: Rotary Feeder

13: dispersion plate

20: windball

21: throttle

30: mixed feeder

30b: screw

30d: cutter

40: drying screen

Hereinafter, the present invention will be described with reference to the accompanying drawings.

First, according to an embodiment of the present invention, as shown in Figure 1, the wind feeder 20 to generate the wind to separate the powdered coke by particle size and the mixed feeder 30 to add the organic caking solution to the separated powdered coal (30) ), And a drying screen 40 for drying the regenerated coal particles made to a certain particle size, and a crushing plant 4 for crushing the separated lump coal to a certain particle size.

That is, referring to Figure 1, the storage tank (1a) of 400mm ² capacity is formed in which anthracite coal, sedimentation basin, powdered coke, etc. are granulated, and it is mixed in the lower portion of the scour feeder 10 and the scour feeder to extrude a certain amount of coal species. A storage tank 11 for temporarily storing the discharged coal and a rotary feeder 12 for quantitatively cutting out the fuel coal of the storage tank 11 are configured to remove fuel coal.

As shown in FIG. 2, the particle size separation facility of the fuel coal has a dispersion plate 13 for uniformly dispersing the fuel coal cut out in the lower portion of the rotary feeder 12 and has a fan-shaped rib shape. The pulverized coal storage tank 22 and the powdered coal storage tank 23, which are separated and stored, have a rectangular box shape, and the upper portions thereof are connected to each other, and the lower portion thereof has a conical shape to facilitate the extraction of the stored fuel coal. There is a control plate 21, the height is adjusted is composed of a rectangular plate shape.

In addition, the goggles storage tank 22 has a configuration in which a wind hole 20 for generating wind for particle size selection is installed, and a dust collector 24 for discharging wind inside the storage tank is installed at an upper end of the powdered coal storage tank 23. .

On the other hand, the bottom of the lump coal storage tank 22 is composed of a transport belt (5B) for processing the separated lump coal is sent to the crushing facility and configured to go through the process of screening the particle size, the coal dust storage tank 23 is separated and collected There is a mixing feeder 30 for mixing the powdered coal, the mixing feeder 30 is composed of a motor 30a for rotating the screw feeder 30b and a casing 30c surrounding the screw feeder 30b, the casing is round The cylindrical end portion has a discharge port (30ca), and next to the discharge port is a separate cutter 30d for cutting the recycled coal to a certain size, and the lower portion of the cutter is a dry screen 40 for drying the recycled coal It is constructed.

The mixing feeder 30, the cutter 30d, and the dry screen 40 will be described in more detail with reference to FIGS. 3 and 5 as follows.

The mixing feeder 30 has a screw hole connected to the shaft inside the rounded casing 30c, and a motor 30a for generating rotational power is mounted at the end of the shaft, and the organic caking solution is injected at the upper end of the casing 30c. Many nozzles are attached.

As shown in FIG. 5, the discharge ports 30ca in the opposite direction in which the motor 30a is mounted are formed with a plurality of discharge ports 30ca wider in the inner side and narrower outward, and the discharge holes have a constant arrangement.

In addition, the cutter 30d is installed close to the discharge port 30ca of the mixed feeder 30c, but is installed in a separate configuration, a cutter blade 30da for cutting the regenerated coal and a fixed plate 30db for fixing it, and It consists of a fixing bolt for fixing it, the cutter blade (30da) of the cutter (30d) is composed of three at an angle of 120 degrees, it is configured to rotate continuously by the rotary motor (30a ').

On the other hand, the dry screen 40 is a vibrating body shaking up and down, the lower end has a closed structure of the inlet pipe and the discharge pipe in which the steam enters, the configuration of the sealed space as shown in Figure 4 (a) This zigzag is configured to flow between the steam guide plate 41.

Referring to the operation of the present invention configured as described above are as follows.

As shown in FIG. 1, when anthracite coal, sedimentation basin, and powdered coke are granulated in the storage tank 1a, a predetermined amount is continuously supplied to the temporary storage tank 11 by rotation of the screw feeder 10, and the supplied fuel coal is rotated. It acts to be cut out by a constant rotational speed of the feeder 12.

As shown in FIG. 2, the fuel coal is dropped onto the distribution plate 13, and when the fuel coal falls on the fan-shaped cardboard, it is blown out by the footing generated in the tuyere 20 when it is evenly spread evenly. The coarse particle | grains collide with the throttling plate, and are granulated in the lump coal storage tank 22.

The powdered coal is blown between the throttle plate 21 and the casing of the storage tank to be granulated in the powdered coal storage tank 23, and the air generated in the tuyere 20 is discharged out of the storage tank through the dust collector 24.

On the other hand, the injection plate 13 is angled up and down, and when the fuel coal has a lot of moisture and the coal dust (less than 1mm) mixing amount is adjusted to the downward direction, and in the opposite case to operate upwardly , The control plate 21 for separating the coal and lump coal serves to adjust the particle size of the coal and lump coal by the action that is adjusted up and down by the operating motor connected to the wire rope.

As shown in FIG. 1, the lump coal separated by particle size is transferred to the storage tank 1a on the top of the grinder 4 and crushed to 10 mm or less by the grinder 4, and then the particle size is 7 mm or less and 7 mm or more through the screen 3abc. 7mm or less is continuously sent to the fuel storage tank used in the sintering industry, and 7mm or more is continuously crushed by the circulation action sent back to the storage tank 4a on the top of the grinder 4.

On the other hand, pulverized coal of -0.125 ~ 1mm or less stored in the powdered coal storage tank 23 is cut out by the rotation of the mixing feeder 30, and the organic caking solution is sprayed into the casing of the mixing feeder 30 by mixing with a plurality of nozzles. Mixed with pulverized coal in the feeder 30.

At this time, since the cohesive component of the organic caking additive solution is contained, the coking force is strengthened between the particles of the pulverized coal during the mixing action, as shown in FIGS. Through several discharge ports 30ca, the same function as the noodles are drawn out.

At this time, pulverized coal particles are cut by the action of cutting the noodle chopped regenerated coal continuously exiting the cutter blade 30da through the discharge port by the electric charge of the cutter 30d which is separately installed close to the discharge port 30ca. It is made of pseudo particle of about 1 ~ 5mm, and the particle size of recycled coal can be adjusted by the rotation speed of cutter.

Particles of the reclaimed coal thus intentionally evaporated while passing through the dry screen 40 to harden the particle size.

This is because the particle size hardens as the water passes through the granulated discharge plate as the steam passes through the zigzag between the dry screens 40 and evaporates the moisture in the organic caking solution.

As described above, pulverized coal particles having a distribution of -0.125 ~ 1mm are regenerated and cured to 1mm ~ 5mm particle size, and then sent to a storage tank for sintering operation to be used for manufacturing sintered ore, and the size of the regenerated particle size is the speed of rotation of the motor for rotating the cutter 30d. It is adjusted by increase and decrease.

The above is summarized as follows.

That is, the sintered powder coke particle size sintering device is a sintered powder coke particle size sintering equipment, a wind feeder for generating wind to separate the sintered fuel coal by particle size, a mixed feeder for adding and mixing the organic caking solution to the separated powdered coal, and And a dry screen for drying the recycled coal and a cutter for cutting the recycled coal recycled in the mixed feeder to a predetermined size.

In addition, the particle size sorting device of the sintered fuel coal is equipped with a fan-shaped dispersion wave at the lower part of the rotary feeder for cutting out various sintered fuel coals, and the coal and lump coal are controlled by the particle size by the wind generated by the windball. It is selected by the height of.

The powder pelletizer is a cutter that is specially designed to separate -0.125 ~ 1mm particle size sintered fine pulverized powder separated by the wind generated from the wind hole into the organic caking solution in the mixing feeder and to be discharged in the form of noodles by the discharge port. Regenerating coal of 1 ~ 5mm particle size is formed by.

In addition, in the coal coal granulation apparatus, the recycled coal made by the mixing feeder and the cutter is dried on a dry screen and cured, and the dry screen is heated with the oscillating body as the steam flows zigzag under the discharge plate. The moisture of the recycled coal hardens as it evaporates.

By this action, the present invention can expect the following effects.

That is, according to the present invention, the powdered coke as sintered fuel has a low volatile content, high fixed carbon, high maximum attained temperature, and a long duration of the temperature, so that the raw material must be sufficiently sintered. In particular, the coke particle size affects the air permeability of the blended raw materials, the combustion light, or the maximum temperature reached, so that a uniform particle size is required. If the coke particle size is fine (-0.125 ~ 1mm), the heat capacity decreases and the combustibility is poor, which leads to deterioration of the room temperature strength and the increase of the unit size of the coke, and the optimum particle size range of 1 ~ 3mm is required.

In the conventional powdered coke crushing plant and method, the powdered coal particle size distribution of 1 mm or less is about 50% and used in the sintering operation without regeneration treatment. However, according to the present invention, reclaimed coal having a size of 1 to 5 mm can be produced using pulverized coal. The reduction of heat capacity can be expected to reduce the unit size and improve the strength at room temperature.The over-crushing caused by screen blockage can prevent the increase of -0.125mm size, which prevents the knitting in the process of mixing with the spectroscopy. Practical effect can be obtained.

The foregoing is merely illustrative of 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 spirit of the invention as set forth in the appended claims. It should be recognized.

Claims (7)

In the particle size sorting device for separating the powdered coke supplied from the storage tank of the sintered powdered coke into coal and powdered coal, The first coal storage tank and the second coal storage tank for storing coal powder are separated by a separator, and a charging hole for charging the coal coke of the storage tank is formed on one side of the first storage tank. Separate storage tank, A dispersion plate installed in the lower portion of the charging hole so as to uniformly distribute the powdered coke charged through the charging hole and falling; Blowing means formed on one side of the first storage tank to blow air so that the powdered coals dispersed and falling from the distribution plate are introduced into the second storage tank; The particle size sorting apparatus of the sintered coke for sintering, characterized in that the dust collector is installed on one side of the second reservoir to discharge the air flowing from the blower means to the outside. According to claim 1, wherein the separation membrane is the particle size selection device for sintered coke for sintering, characterized in that installed between the first reservoir and the second reservoir so that the height can be adjusted. The particle size sorting apparatus for sintering coke sintering according to claim 2, wherein the dispersion plate is provided to enable angle adjustment. In the particle size sizing apparatus for assembling the powdered coal of sintered coke, A mixing feeder having an assembly space in which the coal dust is granulated into recycled coal, and having a discharge port through which the assembled coal is discharged; A binder supply means for supplying an organic binder to the assembly space; Mixing means for mixing the powdered coal and the organic binder in the assembly space to form regenerated coal; A particle size sizing apparatus for sintered coke for sintering, characterized in that it comprises drying means for drying and hardening the regenerated coal discharged through the discharge port. 5. The particle size sizing apparatus of sintered coke for sintering as claimed in claim 4, further comprising a cutter for cutting the recycled coal discharged to the drying means into a predetermined size. The method of claim 4, wherein the mixing means comprises a shaft in which a helical screw is installed, and a rotating motor for rotating the shaft, wherein the powdered coal and the organic binder in the assembly space are mixed while the shaft is rotated. A particle size sizing apparatus for powdered coke for sintering, which is moved toward a discharge port. 5. The particle size of the sintered coke for sintering according to claim 4, wherein the drying means comprises an inclined plate that is inclined at a predetermined angle and a heating means for heating the inclined plate, and the inclined plate is provided to be vibrable. Device.