KR100507750B1 - Apparatus for supplying sinter material - Google Patents

Abstract

The present invention relates to an apparatus for supplying a sintered raw material, wherein the sintered raw material stored in the surge hopper is charged into the sintered bogie, and the apparatus for supplying a sintered raw material for mixing a heat source in the surface layer portion of the sintered raw material charged in the sintered bogie, wherein A rotor shaft 54 positioned rearward from the charging position of the sintered raw material and formed to be longer in the width direction on the upper part of the sintered bogie and radially on an outer surface of the rotor shaft 54 when the moving direction of the sinter bogie is referred to. It characterized in that it comprises a rotor 50 consisting of a plurality of stir blades 56 formed long, and a drive motor 58 connected to drive the rotor shaft 54 to rotate, the heat source in the surface layer portion of the sintered raw material It is added uniformly and has an effect which improves surface layer part sintering strength.

Description

Apparatus for supplying sinter material

The present invention relates to an apparatus for supplying a sintered raw material, and more particularly, to an apparatus for supplying a sintered raw material in which a heat source is uniformly added to the surface layer portion of the sintered raw material to improve the surface layer sintering strength.

In general, the sintered ore manufacturing method discharges the sintered raw materials such as iron ore and secondary raw materials, which are discharged from the sharpening hopper and mixed through a dream mixer, to a sintered bogie through a surge hopper and a drum feeder to a certain height, and the surface sintered raw materials are ignited. Thereafter, by forcedly sucking air from below, the sintered raw material of the sintered trolley is fired to manufacture a sintered ore. After the sintering is completed, the sintered ore is crushed through a crusher, cooled in a cooler, and then sintered ore having a size of 5 to 50 mm suitable for charging into the blast furnace is transferred to the blast furnace. It is classified as and used as sintering raw material again.

In the method of manufacturing the sintered ore, spectroscopy, that is, the amount of semi-light generation, determines the recovery rate of sintering, and the sintering recovery rate is influenced by various factors such as the amount of heat supplied, the amount of binding slag, the strength of the sintered ore, and the porosity. The recovery rate of the sintered ore is remarkably lowered by the so-called weak layer present in the surface layer portion of the sintered raw material.

The reason for the formation of the fragile layer is that the amount of molten slag required for the production of the sintered ore is significantly smaller than that of other parts, which is caused by the suction of room temperature air from the upper part of the sintered raw material charged into the sintered trolley and the sintering present in the surface layer portion. This is because the amount of molten slag required for the production of the sintered ore is insufficiently formed at the surface layer portion because all of the other parts of the sintered raw material are burned before the raw material is sufficiently heated to the extent necessary for the production of the sintered ore. That is, the surface layer portion of the sintered raw material exhibits a weaker sintered ore property than other parts due to a decrease in the sintering temperature during the firing process, a lack of the amount of melt formation, and a decrease in the filling density of the raw material, thereby significantly reducing the sinter recovery.

Therefore, when manufacturing the sintered ore, it is very important to increase the sinter recovery rate by preventing the formation of a weak layer in the surface layer portion of the sintered raw material charged into the sintered bogie, and the widely used method is the powdered coke used as the sintered fuel. And coke concentration in the surface layer portion of the sintered raw material is charged by charging a finely divided heat source having a fine particle size of CDQ dust as powdered coke waste to the surface layer of the sintered raw material.

As an example of the conventional method of increasing the coke concentration in the surface layer portion of the sintered raw material, the technique described in Patent Application No. 2002-49664 will be described. As shown in Fig. 1A, the sintered raw material stored in the surge hopper 100 is drummed. By supplying the upper portion of the inclined plate 104 through the Peter 102, the sintered raw material is lowered along the inclined plate 104 and loaded on the sintered trolley 110. At this time, the furrow is formed by using the vertical rods 130 on the surface layer of the sintered raw material 120 loaded on the sintering bogie 110 and the heat source is supplied to the furrows. Since the compound material containing water is attached to the depth and width of the furrow, the depth and width of the surface layer portion to which the heat source is supplied are changed, so that the light of the vertical rods 130 needs to be removed from time to time. Only a heat source is supplied and it is difficult to add a heat source deeper.

In addition, as shown in (b) of FIG. 1, the lower end portion of the cone 140 for supplying the heat source is inserted into the surface layer of the sintered raw material 120 loaded on the sintering cart 110 to directly supply the heat source to the surface layer of the sintered raw material. However, when the lower end portion of the cone 140 is inserted into the surface layer 50 mm or more, the lower end portion of the cone 140 is clogged so that a heat source is not properly supplied to the surface layer portion, or the lower portion of the cone 140 proceeds together with the sintering cart. There is a problem in that the surface layer portion is unevenly fired due to bending by contact with the sintered raw material.

As another example of the conventional method, describing the technique described in Patent Application No. 2002-70854, the guiding chute is located at a predetermined position of the slipping chute 150 in which segregation of the sintered raw material is made as shown in FIG. By allowing the heat source to be supplied through 160 to mix the sintered raw material with the heat source, it is possible to supply the heat source to a relatively deep depth, while it is virtually impossible to control the heat source to be supplied at a constant depth, thereby providing a depth of 100 mm or more. By mixing the heat source, the heat source is not very helpful in improving the recovery rate of the surface layer, and since the heat source is not uniformly supplied in the width direction, the quality variation caused by the plastic imbalance is severe.

As another example of the conventional method, the technique described in Japanese Patent Laid-Open No. 10-330854 will be described. When the sintered raw material discharged from the hopper falls through the charging chute and is charged into the sintering cart, the sintering raw material is loaded into the charging chute. The solid combustibles are mixed with the sintered raw material while falling or falling along the sintered raw material, so that the compounding amount of the solid combustibles (charcoal materials) present in the surface layer portion of the raw material filling layer which has been charged into the sintered trolley is made to operate more than the lower layer portion. As a method, this has a problem that it is difficult for the carbonaceous material to be loaded only into the top portion of the surface layer portion and mixed into the raw material having a depth within 100 mm from the surface layer portion.

As another example of the conventional method, the technique described in Japanese Patent Application Laid-Open No. 2000-160261 describes a magnetization apparatus provided between the drum feeder and the bogie when feeding the sintered raw material cut out using the drum feeder onto the bogie ( The magnetic material is applied to the flow of the sintered raw material by sedimentation to segregate a large number of magnetic sintered raw materials (semi-glossy, mill scale, etc.) in the upper layer of the sintered raw material layer. As a method of manufacturing a sintered ore by supplying additional lamination, this is a case in which the magnetic segregation charging device and the carbon material charging are combined at the same time, which makes it difficult to use in a sintering machine in which the magnetic segregation charging device is not applied.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a solid heat source such as sintered coke for sintering which can promote the formation of a melt so as to be uniformly loaded in the width direction and a predetermined depth direction. The present invention provides a supply device for a sintered raw material in which the amount of melt generated in the surface layer portion is increased and the sintering is performed uniformly, thereby increasing the strength of the sintered ore and improving the recovery rate.

As a technical configuration for achieving the above object, the present invention, the sintering raw material is stored in the surge hopper to the inside of the sintered trolley, the sintered raw material supply apparatus for mixing the heat source to the surface layer of the sintered raw material charged to the sintered trolley In the above, the rotor shaft which is located behind the charging position of the sintering raw material and formed long in the width direction on the upper side of the sintering bogie when the movement direction of the sinter bogie is based, and the radially long on the outer surface of the rotor shaft And a rotor consisting of two stirring vanes and a drive motor connected to rotate the rotor shaft.

In addition, the rotor shaft is characterized in that it is installed to enable the vertical height adjustment by the adjustment screw.

In addition, the present invention, the heat source storage hopper installed to supply a heat source to the rotor, and the inside of the heat source storage hopper is installed in parallel with the width direction of the sintered trolley micro-rotary valve to supply the heat source to the rotor by a predetermined amount It is characterized in that it further comprises.

In addition, the heat source storage hopper, the paddle shaft is located on the upper side of the micro-rotary valve and installed in parallel with the width direction of the sintered trolley so as to enable rotation in the axial direction, and is fixed to the outer surface of the paddle shaft The paddle stirrer including a plurality of paddles spaced apart by a predetermined distance along the direction, and a drive motor connected to rotationally drive the paddle shaft is further installed.

In addition, the spiral direction in which the paddle is installed is set so that the left and right portions with respect to the center of the paddle shaft are opposite to each other.

In addition, the heat source storage hopper is characterized in that it is provided with a heat source sensor for detecting whether the heat source is filled up to the height set at both ends in the width direction of the sintered trolley.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic configuration diagram showing the transportation equipment of the coke dust and CDQ dust as a heat source according to the present invention, the present invention is a fine source of finely finely divided particle size of the coke dust and CDQ dust used as sintering fuel It is done.

When the minute coke is cut out at the cutout of the minute coke bin 210 by the operation of the air cylinder 212, the minute coke 3 mm or less by the screen 220 is transferred to the primary storage hopper 230 to be used as a heat source. The powdered coke, which is transported and 3 mm or more, is returned to the powdered coke bin 210.

The minute coke, ie, the heat source, stored in the primary storage hopper 230 is transported to the secondary storage hopper 250 by the high pressure air through the transfer vessel 240, and the screw is a fixed quantity cutting device. The feeder-type powder feed feeder 260 is supplied through the vertical chute 270 to the heat source storage hopper 10 constituting the apparatus 1 of the present invention.

A heat source is sensed to generate an electrical signal by detecting whether the heat source supplied to the heat source storage hopper 10 is evenly distributed in the width direction (the same direction as the width direction of the sintered cart) of the heat source storage hopper 10. The sensors 12A and 12B are installed, and the heat source detecting sensors 12A and 12B are respectively positioned at appropriate heights at both ends of the heat source storage hopper 10 in the width direction, and when the heat source is detected therein. An electrical signal is provided to the facility control unit, which is not shown. The facility control unit distributes the heat source evenly with respect to the width direction of the heat source storage hopper 10 by the electrical signal provided from the heat source detection sensors 12A and 12B. The adequacy of the distribution is determined.

That is, when the heat source sensor 12A (12B) detects a heat source and provides a heat source detection signal to the facility control unit, the facility control unit of the powder supply feeder 260 so that the heat source is not supplied to the heat source storage hopper 10. On the contrary, if a heat source is not detected by the heat source detecting sensors 12A and 12B, a facility control unit drives the powder supply feeder 260 to supply a heat source to the heat source storage hopper 10 to thereby supply the heat source. The heat source inside the (10) is to be maintained evenly distributed in the width direction.

In addition, in order to ensure that the heat source is uniformly charged in the heat source storage hopper 10 in the width direction, the vertical chute 270 several spaces apart in the width direction of the heat source storage hopper 10, For example, one each is formed in the center, left and right, and each of these vertical chute 270 is provided with a slide gate 272 is configured to adjust the supply amount of the heat source.

Figure 3 is a configuration diagram showing the overall supply device for the sintered raw material according to the present invention, the sintered raw material 120 stored in the surge hopper 100 is discharged to the inclined plate 104 through the drum feeder 102 to the sintered raw material ( An approximate configuration in which 120 is lowered along the inclined plate 104 and segregated into the sintered trolley is supplied.

The present invention mixes with the sintering raw material of the surface layer portion while supplying the heat source of the heat source storage hopper 10 to the surface layer portion of the sintered raw material segregated so that the particle size becomes smaller toward the top to the sintering bogie through the above process, the progress of the sintering bogie By arranging the position of the heat source storage hopper 10 to be rearward from the lower position of the inclined plate 104 with respect to the direction, the heat source discharged from the heat source storage hopper 10 is supplied to the upper portion of the sintered raw material charged in the sinter bogie. do.

The paddle stirrer 20 and the micro rotary valve 30 are installed in the heat source storage hopper 10 as shown in more detail in FIG. 4, and the paddle stirrer 20 is higher than the micro rotary valve 30. By being located at the heat source of the heat source storage hopper 10 is supplied to the micro rotary valve 30 through the paddle stirrer 20. In addition, a flat plate feeder 40 is disposed in an inclined shape at the lower portion of the heat source storage hopper 10, that is, the heat source discharge portion. At this time, by applying a slight vibration to the feeder 40 is configured in such a way that the heat source supplied to the upper portion is gradually lowered along the inclination of the feeder 40, or the heat source slips along the inclination of the feeder 40 by its own weight It may be configured in the form of falling.

The paddle stirrer 20 is formed in the width direction of the heat source storage hopper 10, as shown in detail in Figure 5 and both ends of the paddle shaft 22 rotatably mounted to the heat source storage hopper 10 and A plurality of paddles 24 fixedly installed on an outer surface of the paddle shaft 22 and spaced apart from each other along a spiral direction, and a driving motor 26 connected to rotationally drive the paddle shaft 22. It includes.

At this time, the spiral direction in which the paddle 24 is installed is set such that the left and right portions with respect to the center of the paddle shaft 22 are opposite to each other.

The micro rotary valve 30 is formed in the width direction of the heat source storage hopper 10, as shown in more detail in Figure 6, the valve shaft 32 that both ends are rotatably mounted to the heat source storage hopper 10 And a blade 34 fixedly installed on an outer surface of the valve shaft 32 and continuous in the longitudinal direction and radially spaced apart in a circumferential direction, and the valve shaft 32 rotates. And a drive motor 36 coupled to drive.

Of course, the size and shape of the micro rotary valve 30 is set so that the heat source can be supplied to the feeder 40 only by the rotation of the micro rotary valve 30.

In addition, a rotor 50 is installed below the feeder 40, and the rotor 50 has a semicircular shape with a convex cross section upward and receives a heat source dropped from the feeder 40 at an upper center thereof. Has a rotor housing 52 in which a heat source supply port 53 is formed. At this time, it is preferable to form a coating film made of a ceramic material on at least the lower side surface of the rotor housing 52 so that the heat source and the sintering material are not easily attached.

The rotor is formed in the lower portion of the rotor housing 52 in a long direction in the direction parallel to the width direction of the heat source storage hopper 10, as shown in more detail in Figure 7 and both ends are rotatably mounted to the rotor housing 52 The shaft 54 is installed.

In addition, the outer surface of the rotor shaft 54 has a long length toward the outer diameter while a plurality of stirring blades 56 which are spaced apart at regular intervals along the spiral direction are integrally installed and the rotor shaft 54 is driven. It is connected and installed to be driven to rotate by the motor 58.

The rotor shaft 54 is preferably moved up and down, and the bearing 55 for supporting both ends of the rotor shaft 54 so as to be rotatable can be moved up and down by the adjustment screw 72 having a handle 73. It is configured to be.

In addition, as shown in FIG. 3, the cutoff plate 60 is installed behind the rotor 50 with respect to the traveling direction of the sintered trolley, and the upper end of the sintered raw material is flat by the lower end of the cutoff plate 60. Leveled to

The operation of the present invention having the above configuration will be described.

The sintered raw material 120 discharged from the surge hopper 100 and supplied to the inclined plate 104 through the drum feeder 102 is lowered along the inclination of the inclined plate 104 so that its particle size increases toward the inside of the sintered bogie. It is charged to segregate to be small.

Then, the sintered raw material loaded on the sintered trolley is mixed by the rotation of the stirring blade 56 together with the heat source supplied through the heat source supply port 53 when the rotor 50 of the present invention enters the lower portion of the installed position. Lose. Of course, the depth at which the heat source and the sintered raw material are mixed is determined by how the lowermost position of the stirring blade 56 is set.

Subsequently, as the sintered trolley proceeds, the level disturbed while being mixed by the stirring blade 56 is flattened by the cutoff plate 60.

Therefore, the heat source is evenly mixed in the width direction and the depth direction of the surface layer portion of the sintered raw material, so that the amount of melt generated in the surface layer portion during sintering is increased and the sintering is performed uniformly, thereby increasing the strength of the sintered ore and improving the recovery rate.

In particular, the heat source is uniformly supplied in the width direction with respect to the surface layer portion of the sintered raw material, which is due to the action of the paddle stirrer 20 and the micro rotary valve 30 installed inside the heat source storage hopper 10, which is more detailed. If you explain it as follows.

When the heat source is supplied to the inside of the heat source storage hopper 10 through the vertical chute 270, that is, the upper portion of the paddle stirrer 20, the heat source is disposed on the paddle shaft 22 to be rotated and spaced apart from each other along the spiral direction. The paddle 24 is supplied to the micro rotary valve 30 while being uniformly extended in the width direction of the heat source storage hopper 10.

Then, the heat source supplied to the micro rotary valve 30 in a state that is uniformly extended in the width direction of the heat source storage hopper 10 is filled in the space between the blades 34 of the micro rotary valve 30, the micro rotary valve When the 30 is rotated, the heat source is supplied to the feeder 40 so that the heat source can be uniformly supplied in the width direction with respect to the surface layer portion of the sintered raw material.

On the other hand, the present inventors, such as carbon concentration (%), recovery rate (%) and 5mm according to the depth to which the stirring blade 56 of the rotor 50 is inserted, using the sintering powder coke and the waste of coke CDQ dust as a heat source The following sintered ore generation rates were investigated.

Sampling to confirm the recovery rate was obtained by using an electric hammer drill on the surface layer after the sintering was completed, about 30kg of the sintered ore to the depth of about 100mm from the surface with a size of 50mm or more, and the sintered ore recovery was calculated by Equation 1 below. .

And the heat source addition amount was 1.5 ton / h to confirm the effect, the results are shown in Table 1 below.

Stirring Blade Insertion Depth (mm) 50 80 100 120 Carbon concentration (%) 6.3 5.2 4.5 3.9 % Recovery 79 81 79.5 80 Sintered ore generation rate of 5 mm or less 5.4 4.0 5.0 5.2

As can be seen in Table 1, when the stirring blade 56 of the rotor 50 is inserted to a depth of about 80 mm from the surface of the sintered raw material, the carbon concentration is maintained at 5 to 6%, the recovery is the maximum, It was found that the sintered ore generation rate of 5 mm or less was minimal.

In addition, when the device of the present invention is equipped and the conventional state is not provided, after the sintering, the carbon concentration and temperature in the width direction corresponding to the side wall starting from one side wall to the other side wall Was investigated and shown in Table 2 below.

Width direction distance (mm) 0-50 50-100 100-150 Central part 200-250 250-300 350-400 Conventional Carbon concentration 3.0 5.2 6.0 3.0 4.5 6.2 3.2 Temperature (℃) 50 300 460 45 250 410 45 The present invention Carbon concentration 5.0 5.2 4.9 5.0 5.2 5.3 5.2 Temperature (℃) 350 400 420 360 400 420 360

According to Table 2, in the conventional case, the temperature is very low due to the small amount of heat source added in the portion close to the center portion and the sidewall, which means that the recovery rate is low. On the other hand, in the case of the present invention, since the heat source is uniformly added to the width direction of the sintered trolley, the carbon concentration and the temperature deviation are not large, and thus, the uniform firing is performed in the width direction.

As described above, according to the apparatus for supplying a sintered raw material according to the present invention, the heat source is uniformly supplied in the width direction of the sintered trolley by a paddle stirrer and a micro rotary valve provided inside the heat source storage hopper, and the heat source and the sintered by the rotor. Firing is uniformly performed by uniformly mixing the raw materials to the appropriate depth of the surface layer portion, whereby the strength of the sintered ore is increased and the recovery rate is improved.

1 (a) to (c) is a schematic configuration diagram showing a method for supplying a sintered raw material according to the prior art;

Figure 2 is a schematic block diagram showing a transport facility of the bunk coke and CDQ dust which is a heat source according to the present invention;

Figure 3 is a configuration diagram showing the overall supply of the sintered raw material supply apparatus according to the present invention;

4 is a perspective view showing details of the main part of the present invention;

5 is a perspective view showing a paddle stirrer of the present invention;

6 is a perspective view showing a micro rotary valve of the present invention;

Figure 7 is a perspective view of the rotor of the present invention.

※ Explanation of code about main part of drawing ※

10: Heat source storage hopper 12A, 12B: Heat source detection sensor

20 paddle stirrer 22 paddle shaft

24: paddle 26: drive motor

30: micro rotary valve 50: rotor

54 rotor shaft 56 stirring blades

58: drive motor 72: adjustment screw

Claims (6)

A rotor shaft 54 positioned rearward from the charging position of the sintered raw material and formed to be longer in the width direction on the upper part of the sintered bogie and radially on an outer surface of the rotor shaft 54 when the moving direction of the sinter bogie is referred to A sintered raw material supply device, comprising: a plurality of elongated stirring vanes 56 and a rotor 50 formed of a driving motor 58 connected to rotate the rotor shaft 54 in rotation. In the supply apparatus of the sintered raw material which charges the raw material into the sintered trolley and mixes a heat source in the surface layer portion of the sintered raw material charged to the sintered trolley, A heat source storage hopper 10 installed to supply a heat source to the rotor 50, and a length of the heat source storage hopper 10 is installed in the heat source storage hopper 10 so as to be parallel to the width direction of the sintered trolley for a predetermined amount of the heat source to the rotor 50. Supply device for sintered raw material, characterized in that it comprises a micro rotary valve (30) to be supplied. The apparatus of claim 1, wherein the rotor shaft (54) is installed to be able to adjust the vertical height by the adjusting screw (72). delete The paddle shaft (22) of claim 1, wherein the heat source storage hopper (10) is positioned above the micro rotary valve (30) and is installed to be parallel to the width direction of the sintered trolley to allow rotation in the axial direction. ), A plurality of paddles 24 fixedly installed on an outer surface of the paddle shaft 22 and spaced apart from each other along the spiral direction, and a driving motor 26 connected to rotate the paddle shaft 22 in rotation. The paddle stirrer 20 including a supply device for sintering raw material, characterized in that is further installed. 5. The apparatus of claim 4, wherein the helical direction in which the paddles (24) are installed is set so that left and right portions of the paddle shaft (22) are opposite to each other. The heat source storage hopper 10 is provided with a heat source detection sensor (12A) (12B) for detecting whether the heat source is filled up to a height set at both ends in the width direction of the sinter bogie. Supply device for sintered raw material, characterized in that.