KR100402027B1 - apparatus for pressing the upper material layer of sinter machine - Google Patents

Abstract

The present invention relates to a device for pressing the upper layer of the compounding material charged to the trolley of the sintering machine, and more specifically, after loading the compounding material on the trolley to increase the loading density of the sintered upper layer to maximize the recovery rate of the upper layer, ignition The present invention relates to an apparatus for pressing the upper portion of a raw material of a sintering machine which is improved to prevent the occurrence of adhesion light on the inner wall of the ignition furnace due to the scattering of fine powder during ignition in the furnace.

According to the present invention, a trolley (7) loaded with a drum feeder (16) for dispensing a blended raw material, and a blended raw material flowing down the inclined deflector plate (2) form a particulate lower layer (61b) and an upper layer (61a) of assembly. And a sintering machine for producing a sintered ore having an ignition furnace 6 for igniting a flame on the charged raw material surface, the press roll having an outer surface in contact with the upper layer portion 61a of the blended raw material charged in the trolley 7. 10) and the press roll 10 is rotated at a high speed in a direction opposite to the forward movement direction of the trolley 7 so as to be provided at one end of the press roll 10 so that the compounding material is not attached to the outer surface of the roll. The motor member 15 and the operating member 20 for raising and lowering the press roll 10 in proportion to the moving speed of the cart 7 are configured.

Description

Apparatus for pressing the upper material layer of sinter machine

The present invention relates to a device for pressing the upper layer of the compounding material charged to the trolley of the sintering machine, and more specifically, after loading the compounding material on the trolley to increase the loading density of the sintered upper layer to maximize the recovery rate of the upper layer, ignition The present invention relates to an apparatus for pressing the upper portion of a raw material of a sintering machine which is improved to prevent the occurrence of adhesion light on the inner wall of the ignition furnace due to the scattering of fine powder during ignition in the furnace.

In general, as shown in FIG. 1, a process of manufacturing a sintered ore using a sintering machine includes a predetermined amount of raw materials including iron ore, secondary raw materials, and coke, which is a heat source, discharged from a storage hopper. After assembling with addition of moisture, it is charged into the surge hopper 13 on the sintering machine, and then discharged to the deflector plate 2 side by the drum feeder 16, and the post-layer height is cut by the cut-off plate 5. It moves with the trolley | bogie 7 to the ignition furnace 6 side.

In this state, the main air blower (MAIN BLOWER) (11) connected to the gas main duct (GAS MAIN DUCT) (4) and the wind box (WIND BOX) (9) connected to it by suctioning the outside air from the top to the bottom It is a pretreatment process of the raw material which agglomerates a powdered iron ore by melt | dissolution by melting at high temperature, crushes the sintered ore discharged by baking, with the crusher 8, and improves the air permeability inside a furnace and loads it into a blast furnace for easy operation.

At this time, the sintering time is usually 30 to 40 minutes, the method of manufacturing the optimal sintered ore directed to the production of sintered ore to maintain the quality of the sintered ore, sintered ore of the size suitable for use in the blast furnace at the lowest manufacturing cost with the maximum recovery rate To prepare.

As shown in Fig. 2 (a) and (b), the blended raw material charged into the lower suction type sintering machine flows downwardly through the inclined deflector plate 2, which is a charging facility, and the iron ore particles of the granulation are lower layer 61b. ), The fine particles are charged in the upper layer portion 61a, respectively, to form a layer thickness of about 700 mm.In the 200 mm portion of the upper layer portion 61a, the firing proceeds quickly due to the weakening of the binding force due to the decrease in the loading density. Even if the fraction of 5mm or less is 70% or more, it becomes an unsuitable product that does not meet the particle size standard and strength regulated in the blast furnace, and is fired again in sintering. This raises the manufacturing cost and causes quality defects.

In addition, although the charging lower layer portion 61b has a long firing time due to the increase in the charging density and the strengthening of the bonding force by the weight of the blended raw material of the upper layer portion 61a and the pressure sucked from the main air blower 11, the firing time is good, and the particles are crushing equipment. It is crushed into a particle size suitable for use in blast furnaces.

As described above, there is a problem of raising the sintering cost due to the imbalance of the quality due to the difference in the loading density of the upper layer portion 61a and the lower layer portion 61b of the sintered charge layer and the recovery rate due to the increase of the fraction of the upper layer portion 61a. The lower upper portion 61a forms the attached light while the fine powder is scattered by the high-temperature flame of the ignition furnace 6 and adheres to the inner wall of the ignition furnace 6, thereby lowering the operation rate of the ignition furnace 6. .

Therefore, in order to solve such a problem, the method of supplying a large amount of coke of fuel to a charging surface layer to solve the heat shortage of a surface layer part is disclosed by Japanese Patent No. 61-140087, and pressurizing the raw material layer part which passed the ignition furnace is carried out. The method is disclosed in Japanese Patent No. 61-9526.

However, No. 61-140087 has increased the amount of coke used to increase the production cost of sintered ore, and caused poor quality due to overfiring due to melting of coke and ore at the surface layer portion. In addition, since the time point at which pressure is initiated in the sintered surface layer part is already at the point in which the surface layer part is sintered, there is a problem that it does not affect the recovery rate of the sintered surface layer part.

In addition, there is a technique to adjust the roll pressing pressure by the weight mounted on one end of the roll while being driven by the trolley traveling speed of the sintering machine in the state of pressurizing the roll in contact with the raw material surface layer, Since the rotational speed of the same as the bogie speed (2.7 to 3.3m / min), there is a problem in that the compounding material is attached to the outer surface of the roll, the compounding material is attached to grow light as an attachment light, worsening the sintering operation.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its object is to increase the loading density of the upper sintered part after loading the compounding material on the balance, to maximize the recovery of the upper part, and at the time of ignition in the ignition furnace. It is an object of the present invention to provide an apparatus for pressing the upper portion of a raw material of a sintering machine that can prevent adhesion light generation on the inner wall of an ignition furnace by scattering of fine powder.

1 is a schematic view showing a general sintering manufacturing process,

2 (a) and 2 (b) are diagrams showing a state in which a raw material layer is charged in a balance of a general sintering machine,

3 is a block diagram showing an upper raw material pressing device of the sintering machine according to the present invention,

Figure 4 is a graph showing the productivity, recovery rate and generation rate during the sintering operation using the upper raw material pressing device of the sintering machine according to the present invention, Figure 5 is an installation state of the upper raw material pressing device of the sintering machine according to the present invention.

Explanation of symbols on the main parts of the drawings

2 ..... Deflector Plate 7 ..... Balance

6 ..... 10 ignition furnaces .... press roll

12 .... reducer 15 .... motor member

16 ..... Drum Feeder 17 ..... Motor Bass

20 ..... operating member 22 ..... fixed base

As a technical configuration for achieving the above object, the present invention,

A drum feeder for dispensing the blended raw material, a bogie loaded with the blended raw material flowing down the inclined deflector plate forming a lower layer of granules and an upper layer of granulation, and an ignition furnace for igniting the flame on the loaded raw material surface are provided. In the sintering machine to be manufactured, a press roll having an outer surface in contact with an upper layer portion of the blended raw material charged into the trolley, and provided at one end of the press roll so that the blended raw material is not adhered to the roll outer surface in the forward movement direction of the trolley. To provide a pressing device of the raw material upper layer of the sintering machine characterized in that it comprises a motor member for rotating the press roll at a high speed in the opposite rotation direction and an operation member for raising and lowering the press roll in proportion to the moving speed of the bogie. By.

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

Figure 3 is a block diagram showing the upper raw material pressing device of the sintering machine according to the present invention, Figure 5 is an installation state diagram of the upper raw material pressing device of the sintering machine according to the present invention, the apparatus 100 of the present invention As shown in Figure 5 and 5, before the compounding material is installed on one side of the trolley (7) in which a predetermined height is charged and the spark is ignited in the ignition furnace (6) to be fired, The apparatus 100 presses the upper layer 61a downward in a state in which the outer surface is in contact with the surface of the upper layer 61a of the blended material and rotates at a high speed so as to prevent the binding force from lowering due to the lowering of the charging density. 10, the motor member 15 and the operating member 20.

That is, the press roll 10 is disposed so that the outer surface is in contact with the upper layer portion 61a of the back pressure raw material charged into the trolley 7 over the entire width, and has a length greater than the width of the trolley 7. It is absent.

At one end of the press roll 10, the press roll 10 is oriented in one direction so that the particulate compound material charged in the upper layer portion 61a of the trolley 7 is not attached to the outer surface of the roll 7. The motor member 15 for rotating at a high speed in the opposite direction to is mounted via the speed reducer 12.

In addition, the press roll 10 is preferably rotated at a high speed of 180 rpm or more so that generation of adhered light is difficult due to the attachment of the raw material of the upper layer portion 61a of the trolley 7, as shown in the experimental results as shown in Table 1 below.

Rpm 0 30 60 90 120 150 180 210 Number of attachments 10 8 5 5 4 3 0 0

In addition, the motor member 15 for rotationally driving the press roll 10 is fixedly installed on the motor base 17, the motor base 17 is an operating member such as a cylinder mounted on the fixed base 22 As it is connected to the rod end of the (20), the moving speed of the trolley (7), that is, the speed of moving toward the ignition furnace (6) increases in proportion to the press roll 10 to the upper portion 61a side of the operating member While lowering and pressing as 20 to increase the charging density of the upper layer portion 61a in contact with it, while the moving speed of the bogie 7 decreases in proportion to this as the movement of the press roll 10 upwards the operating member It is preferable that the press roll 10 is idling when the speed of the trolley 7 is 2.7 m / min, while raising as 20 to reduce the degree of pressurization.

Here, the operating member 20 used to adjust the pressing length in proportion to the moving speed of the trolley 7 as shown in Table 2 below is limited to the cylinder member, but the shanghai motor member and the like. Anything can be adopted as long as the volume can be adjusted accurately.

Pressed (mm) Idling One 2 3 4 Bogie moving speed (m / min 2.7 2.7 to 3.0 3.0 to 3.15 3.15 to 3.4 Above 3.4

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

First, when the sintering machine is started, the blended raw material containing water is discharged by the drum feeder 16 installed at the lower end of the surge hopper 13, and the discharged blended raw material proceeds in one direction while descending the slope of the deflector plate 2. It starts to be charged in the trolley | bogie 7.

And the raw material of granulation among the compounding materials charged in the said trolley | bogie 7 is charged to a fixed height so that the lower layer part 61b may be formed, and the granular compounding material is charged to a certain height so that an upper part 61a may be formed in the upper part. .

In addition, the press roll 10 provided in the width direction of the trolley 7 between the deflector plate 2 and the ignition furnace 6 four minutes after the charging of the blending raw material by the drum feeder 16 is started. External power is applied to the motor member 15 connected thereto so as to rotate in one direction.

In this case, the press roll 10 whose outer surface is in contact with the upper layer portion 61a of the trolley 7 is rotated at a high speed in a direction opposite to the forward movement direction of the trolley 7, wherein the press roll 10 Rotational speed of) is rotated at 180rpm, so that the upper portion 61a containing 6.5% or more of water is temporarily separated so that the compounding material of the upper layer 61a is not attached to the press roll 10 and the upper layer portion 61a is smoother and the charging density is increased.

On the other hand, when the moving speed of the trolley 7 loaded with compounding materials is increased, the press roll 10 is moved downward in proportion to the speed to increase the pressurization density and increase the loading density and at the same time recover the post-firing recovery rate. On the other hand, when the moving speed of the trolley 7 decreases, the press roll 10 for pressing the upper layer portion 61a is raised in proportion to the speed.

That is, the press roll 10 which rotates at a high speed in one direction detects the moving speed of the trolley 7 after the layer and if the moving speed of the trolley 7 is less than or equal to 2.7 m / min, performs idling 2.7 to 3.0 m / min. If the upper layer 61a is pressed about 1mm in the initial state in contact with the outer surface, if the pressure is 3.0 to 3.2m / min, about 2mm, if 3.2 to 3.4m / min is about 3mm, if more than 3.4m / min Pressurization to more than 4mm to increase the loading density of the upper layer.

A compounding material containing moisture by contacting the upper press portion (10a) of the compounding material charged in the trolley (7) between the ignition furnace (6) and the deflector plate (2) in a high-speed rotation in one direction as described above. While increasing the loading density while raising and lowering the press roll 10 in accordance with the moving speed of the bogie 7 while preventing the adhesion of the sintered ore according to the pressing length of the press roll 10 as shown in FIG. It can be seen that the sintering recovery rate of the upper layer portion 61a with low charge density can be improved by 76% or more, while the sintering fraction is lowered.

According to the present invention having the above-described configuration, before the compounding material is charged to the trolley and the spark ignition occurs in the ignition furnace, the press roll contacting in the width direction with the upper layer of the charged compounding material is rotated at high speed, and the balance movement is performed at the same time. By increasing the length of pressing as the speed increases, the upper layer of the moisture-containing compound material is attached to the surface of the press roll, and the particle density of the upper layer is prevented while preventing the particulate compound material from adhering to the furnace wall when it passes through the ignition furnace. By increasing the productivity and recovery rate is increased, the effect of lowering the sintered fraction to improve the sintered ore of good quality is obtained.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

Claims (3)

A drum feeder 16 for dispensing the compounding material, a bogie 7 in which the compounding material flowing down the inclined deflector plate 2 is formed while forming the lower layer 61b of fine particles and the upper layer 61a of granulation; In the sintering machine which manufactures a sintered ore by having the ignition furnace 6 which ignites a flame on the charged raw material surface, A press roll 10 having an outer surface in contact with the upper layer portion 61a of the blended raw material charged to the trolley 7 and one end of the press roll 10 is disposed so that the blended raw material is not attached to the roll outer surface. Lifting and lowering of the press roll 10 in proportion to the movement speed of the motor member 15 and the bogie 7 for rotating the press roll 10 at a high speed in a direction opposite to the forward movement direction of the bogie 7. Pressing device of the raw material upper layer of the sintering machine, characterized in that it comprises a working member 20 to be configured. The method of claim 1, The press roll 10 is rotated at a high speed of 180rpm so that it is difficult to generate the adhesion light due to the attachment of the blended raw material of the upper portion of the cart (7). The method of claim 1, The press roll 10 detects the moving speed of the trolley 7 and idles when the moving speed of the trolley 7 is 2.7 m / min or less, and when the moving speed of the trolley 7 is 2.7 to 3.0 m / min, the upper layer portion 61a. In the initial state of contact with the outer surface is pressed about 1mm, 3.0 to 3.2m / min, 2mm is pressed, 3.2 to 3.4m / min is pressed about 3mm, 3.4m / min or more is pressed to 4mm or more A raw material upper layer pressing device of the sintering machine.